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3d Printing Of Lunar Regolith Based Ceramics Via The Dlp Method, Ricardo Vasquez 2022 Florida International University

3d Printing Of Lunar Regolith Based Ceramics Via The Dlp Method, Ricardo Vasquez

2022 MME Undergraduate Research Symposium

Ceramic parts generally have poor machinability due to their high hardness and high brittleness. Researchers and industries have overcome the difficulty of machining ceramics and have manufactured parts with intricate geometry by using pre-ceramic polymers in stereolithography (SLA) 3D printing and using slurries based on ceramic powder and photopolymer resin in digital light processing (DLP) 3D printing, among other methods. This presentation will discuss the processes involved in the 3D printing of ceramic and ceramic composite parts via the DLP technique. A vital step in ceramic 3D printing is to optimize the printing parameters for a specific slurry formulation in …


Fracture Strength Of Multi-Component Ultra-High Temperature Carbides, Gia Garino 2022 Florida International University

Fracture Strength Of Multi-Component Ultra-High Temperature Carbides, Gia Garino

2022 MME Undergraduate Research Symposium

Ultra-high temperature ceramics (UHTCs) have emerged as a promising material for next generation re-entry hypersonic vehicles due to high melting point (>3000 °C), and high mechanical properties and oxidation resistance. Yet none of the unary UHTCs can satisfy the whole gamut of demanding requirements for aerospace applications. Recently, the single-phase solid-solution formation in a multi-component ultra-high temperature ceramic (MC-UHTC) materials have gained interest due to their superior thermo-mechanical properties compared to conventional UHTCs. Herein, a systematic approach was used to fabricate binary (Ta, Nb)C, ternary (Ta, Nb, Hf)C, and quaternary (Ta, Nb, Hf, Ti)C UHTCs by gradual addition of …


Developing Positive Thermal Coefficient (Ptc) Heaters For Solar Electric Cooking, Katarina Ivana Brekalo, Andrew Shepherd 2022 California Polytechnic State University, San Luis Obispo

Developing Positive Thermal Coefficient (Ptc) Heaters For Solar Electric Cooking, Katarina Ivana Brekalo, Andrew Shepherd

Physics

Positive Thermal Coefficients, PTCs, are materials that abruptly change in resistance in response to changes in temperature. The purpose of this experiment is to explore the viability of using the switching type ceramic PTC thermistor as a replacement for current resistive heaters. These types of PTCs have a nonlinear change in resistance with increases in temperature. This device will be used as a temperature-controlling heating element intended to power an Insulated Solar Electric Cooker (ISEC). The ISEC is designed to cook meals throughout the day for impacted communities as an alternative cooking method that doesn’t require biofuel as an energy …


Synthesis And Consolidation Of The Aluminosilicate Mineral Anorthite, Lauren E. Eccles 2022 University of Tennessee, Knoxville

Synthesis And Consolidation Of The Aluminosilicate Mineral Anorthite, Lauren E. Eccles

Pursuit - The Journal of Undergraduate Research at The University of Tennessee

Solid-state ceramic synthesis is a fabrication process involving high temperature reactions of solid component powders and is used to prepare materials with novel and advanced properties. Regarding synthetic mineral ceramics, the solid-state process makes it possible to design synthetic minerals with specific compositions and properties not commonly found in their natural, comparatively impure, counterparts. This study focuses on the synthesis of the feldspar anorthite, CaAl2Si2O8, via solid-state procedures and the densification of the synthesized powders using the technique of uniaxial hot-pressing. Constituent powders of aluminum sesquioxide (Al2O3), silicon dioxide (SiO …


The Effects Of Curing Temperature On The Hydration Kinetics Of Plain And Fly Ash Pastes And Compressive Strength Of Corresponding Mortars With And Without Nano-Tio2 Addition., Dan Huang, Mirian Velay-Lizancos, Jan Olek 2022 Purdue University

The Effects Of Curing Temperature On The Hydration Kinetics Of Plain And Fly Ash Pastes And Compressive Strength Of Corresponding Mortars With And Without Nano-Tio2 Addition., Dan Huang, Mirian Velay-Lizancos, Jan Olek

International Conference on Durability of Concrete Structures

Incorporation of fly ash in cementitious systems containing ordinary portland cement (OPC) increases their long-term strength and durability. However, replacement of cement by fly ash also reduces the heat of hydration of such systems and reduces early-age strength development. The reduced rate of strength development can increase the risk of durability problems, e.g. scaling, in cases when young concrete is exposed to low temperatures and deicing chemicals. This study investigated the potential of nano-titanium dioxide (nano-TiO2) particles to modify the hydration kinetics of fly ash pastes and compressive strength development of corresponding mortars cured under low (4°C) and …


Corrosion Performance Of Embedded Steel Bar In Cl--Contaminated Limestone Calcined Clay Cement (Lc3) At Initial Stage Of Hydration, Weiwen Li, Zuhua Xu, Yaocheng Wang, Xin Wang, Feng Xing 2022 Shenzhen University

Corrosion Performance Of Embedded Steel Bar In Cl--Contaminated Limestone Calcined Clay Cement (Lc3) At Initial Stage Of Hydration, Weiwen Li, Zuhua Xu, Yaocheng Wang, Xin Wang, Feng Xing

International Conference on Durability of Concrete Structures

Limestone Calcined Clay Cement (LC3) presents brilliant properties in binding Cl- so that the embedded steel bars are probably protected in Cl--contaminated condition, which meets the need of sea sand application. However, the corrosion performance of steel bars embedded in LC3 paste with Clis unclear, especially in early age hydration. Thus, a series of experiments were carried out to evaluate the corrosion performance of steel bars on initial and hardened stages of hydration, including concentration of OH- and Cl- in real pore solution, open circuit potential (OCP) and chemical elements of steel bars. …


Progress In Ceramic Materials And Structure Design Toward Advanced Thermal Barrier Coatings, Zhi-Yuan WEI, Guo-Hui MENG, Lin CHEN, Guang-Rong LI, Mei-Jun LIU, Wei-Xu ZHANG, Li-Na ZHAO, Qiang ZHANG, Xiao-Dong ZHANG, Chun-Lei WAN, Zhi-Xue QU, Lin CHEN, Jing FENG, Ling LIU, Hui DONG, Ze-Bin BAO, Xiao-Feng ZHAO, Xiao-Feng ZHANG, Lei GUO, Liang WANG, Bo CHENG, Wei-Wei ZHANG, Peng-Yun XU, Guan-Jun YANG, Hong-Neng CAI, Hong CUI, You WANG, Fu-Xing YE, Zhuang MA, Wei PAN, Min LIU, Ke-Song ZHOU, Chang-Jiu LI 2022 State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi’an Jiaotong University, Xi’an 710049, China

Progress In Ceramic Materials And Structure Design Toward Advanced Thermal Barrier Coatings, Zhi-Yuan Wei, Guo-Hui Meng, Lin Chen, Guang-Rong Li, Mei-Jun Liu, Wei-Xu Zhang, Li-Na Zhao, Qiang Zhang, Xiao-Dong Zhang, Chun-Lei Wan, Zhi-Xue Qu, Lin Chen, Jing Feng, Ling Liu, Hui Dong, Ze-Bin Bao, Xiao-Feng Zhao, Xiao-Feng Zhang, Lei Guo, Liang Wang, Bo Cheng, Wei-Wei Zhang, Peng-Yun Xu, Guan-Jun Yang, Hong-Neng Cai, Hong Cui, You Wang, Fu-Xing Ye, Zhuang Ma, Wei Pan, Min Liu, Ke-Song Zhou, Chang-Jiu Li

Journal of Advanced Ceramics

Thermal barrier coatings (TBCs) can effectively protect the alloy substrate of hot components in aeroengines or land-based gas turbines by the thermal insulation and corrosion/erosion resistance of the ceramic top coat. However, the continuous pursuit of a higher operating temperature leads to degradation, delamination, and premature failure of the top coat. Both new ceramic materials and new coating structures must be developed to meet the demand for future advanced TBC systems. In this paper, the latest progress of some new ceramic materials is first reviewed. Then, a comprehensive spalling mechanism of the ceramic top coat is summarized to understand the …


A Versatile Defect Engineering Strategy For Room-Temperature Flash Sintering, Angxuan WU, Ziyang YAN, Xilin WANG, Zhiyang YU, Rongxia HUANG, Nianping YAN, Zhidong JIA 2022 Engineering Laboratory of Power Equipment Reliability in Complicated Coastal Environments, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China

A Versatile Defect Engineering Strategy For Room-Temperature Flash Sintering, Angxuan Wu, Ziyang Yan, Xilin Wang, Zhiyang Yu, Rongxia Huang, Nianping Yan, Zhidong Jia

Journal of Advanced Ceramics

In this study, we reported that flash sintering (FS) could be efficiently triggered at room temperature (25 ℃) by manipulating the oxygen concentration within ZnO powders via a versatile defect engineering strategy, fully demonstrating a promising method for the repaid prototyping of ceramics. With a low concentration of oxygen defects, FS was only activated at a high onset electric field of ~2.7 kV/cm, while arcs appearing on the surfaces of samples. Strikingly, the onset electric field was decreased to < 0.51 kV/cm for the activation of FS initiated, which was associated with increased oxygen concentrations coupled with increased electrical conductivity. Thereby, a general room-temperature FS strategy by introducing intrinsic structural defect is suggested for a broad range of ceramics that are prone to form high concentration of point defects.


Equiatomic 9-Cation High-Entropy Carbide Ceramics Of The Ivb, Vb, And Vib Groups And Thermodynamic Analysis Of The Sintering Process, Yuan QIN, Ji-Xuan LIU, Yongcheng LIANG, Guo-Jun ZHANG 2022 State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China;Institute of Functional Materials, Donghua University, Shanghai 201620, China

Equiatomic 9-Cation High-Entropy Carbide Ceramics Of The Ivb, Vb, And Vib Groups And Thermodynamic Analysis Of The Sintering Process, Yuan Qin, Ji-Xuan Liu, Yongcheng Liang, Guo-Jun Zhang

Journal of Advanced Ceramics

The preparation of high-entropy (HE) ceramics with designed composition is essential for verifying the formability models and evaluating the properties of the ceramics. However, inevitable oxygen contamination in non-oxide ceramics will result in the formation of metal oxide impurity phases remaining in the specimen or even escaping from the specimen during the sintering process, making the elemental compositions of the HE phase deviated from the designed ones. In this work, the preparation and thermodynamic analysis during the processing of equiatomic 9-cation HE carbide (HEC9) ceramics of the IVB, VB, and VIB groups were studied focusing on the removing of the …


Al-Modification For Ps-Pvd 7ysz Tbcs To Improve Particle Erosion And Thermal Cycle Performances, Xiaofeng ZHANG, Ming LI, Ao ZHANG, Shuangquan GUO, Jie MAO, Chunming DENG, Panpan WANG, Changguang DENG, Junli FENG, Min LIU, Kesong ZHOU, Cheng LAI 2022 National Engineering Laboratory for Modern Materials Surface Engineering Technology & the Key Lab of Guangdong for Modern Surface Engineering Technology, Institute of New Materials, Guangdong Academy of Science, Guangzhou 510650, China

Al-Modification For Ps-Pvd 7ysz Tbcs To Improve Particle Erosion And Thermal Cycle Performances, Xiaofeng Zhang, Ming Li, Ao Zhang, Shuangquan Guo, Jie Mao, Chunming Deng, Panpan Wang, Changguang Deng, Junli Feng, Min Liu, Kesong Zhou, Cheng Lai

Journal of Advanced Ceramics

Plasma spray-physical vapor deposition (PS-PVD) as a novel process was used to prepare feather-like columnar thermal barrier coatings (TBCs). This special microstructure shows good strain tolerance and non-line-of-sight (NLOS) deposition, giving great potential application in aero-engine. However, due to serious service environment of aero-engine, particle erosion performance is a weakness for PS-PVD 7YSZ TBCs. As a solution, an Al-modification approach was proposed in this investigation. Through in-situ reaction of Al and ZrO2, an α-Al2O3 overlay can be formed on the surface of 7YSZ columnar coating. The results demonstrate that this approach can improve particle erosion …


Boron-Modified Perhydropolysilazane Towards Facile Synthesis Of Amorphous Sibn Ceramic With Excellent Thermal Stability, Ying ZHAN, Wei LI, Tianshu JIANG, Claudia FASEL, Emmanuel III RICOHERMOSO, Jan BERNAUER, Zhaoju YU, Zhenghao WU, Florian MÜLLER-PLATHE, Leopoldo MOLINA-LUNA, Ralf GROTTENMÜLLER, Ralf RIEDEL 2022 Department of Materials and Earth Sciences, Technical University of Darmstadt, D-64287 Darmstadt, Germany

Boron-Modified Perhydropolysilazane Towards Facile Synthesis Of Amorphous Sibn Ceramic With Excellent Thermal Stability, Ying Zhan, Wei Li, Tianshu Jiang, Claudia Fasel, Emmanuel Iii Ricohermoso, Jan Bernauer, Zhaoju Yu, Zhenghao Wu, Florian Müller-Plathe, Leopoldo Molina-Luna, Ralf Grottenmüller, Ralf Riedel

Journal of Advanced Ceramics

SiBN ceramics are widely considered to be the most promising material for microwave-transparent applications in harsh environments owing to its excellent thermal stability and low dielectric constant. This work focuses on the synthesis and ceramization of single-source precursors for the preparation of SiBN ceramics as well as the investigation of the corresponding microstructural evolution at high temperatures including molecular dynamic simulations. Carbon- and chlorine-free perhydropolysilazanes were reacted with borane dimethyl sulfide complex at different molar ratios to synthesize single-source precursors, which were subsequently pyrolyzed and annealed under N2 atmosphere (without ammonolysis) to prepare SiBN ceramics at 1100, 1200, and …


Efficient Photocatalytic Hydrogen Evolution Coupled With Benzaldehyde Production Over 0d Cd0.5Zn0.5S/2d Ti3C2 Schottky Heterojunction, Junnan TAO, Mingyuan WANG, Guiwu LIU, Qinqin LIU, Lei LU, Neng WAN, Hua TANG, Guanjun QIAO 2022 School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China

Efficient Photocatalytic Hydrogen Evolution Coupled With Benzaldehyde Production Over 0d Cd0.5Zn0.5S/2d Ti3C2 Schottky Heterojunction, Junnan Tao, Mingyuan Wang, Guiwu Liu, Qinqin Liu, Lei Lu, Neng Wan, Hua Tang, Guanjun Qiao

Journal of Advanced Ceramics

Converting water into hydrogen fuel and oxidizing benzyl alcohol to benzaldehyde simultaneously under visible light illumination is of great significance, but the fast recombination of photogenerated carriers in photocatalysts seriously decreases the conversion efficiency. Herein, a novel dual-functional 0D Cd0.5Zn0.5S/2D Ti3C2 hybrid was fabricated by a solvothermally in-situ generated assembling method. The Cd0.5Zn0.5S nano-spheres with a fluffy surface completely and uniformly covered the ultrathin Ti3C2 nanosheets, leading to the increased Schottky barrier (SB) sites due to a large contact area, which could accelerate the electron-hole separation …


High-Temperature Transport Properties Of Basn1-XScXO3-Δ Ceramic Materials As Promising Electrolytes For Protonic Ceramic Fuel Cells, Inna A. ZVONAREVA, Alexey М. MINEEV, Natalia A. TARASOVA, Xian-Zhu FU, Dmitry A. MEDVEDEV 2022 Institute of High Temperature Electrochemistry, Ural Branch of the Russian Academy of Sciences, Yekaterinburg 620066, Russia;Ural Federal University, Yekaterinburg 620002, Russia

High-Temperature Transport Properties Of Basn1-XScXO3-Δ Ceramic Materials As Promising Electrolytes For Protonic Ceramic Fuel Cells, Inna A. Zvonareva, Alexey М. Mineev, Natalia A. Tarasova, Xian-Zhu Fu, Dmitry A. Medvedev

Journal of Advanced Ceramics

Protonic ceramic fuel cells (PCFCs) offer a convenient means for electrochemical conversion of chemical energy into electricity at intermediate temperatures with very high efficiency. Although BaCeO3- and BaZrO3-based complex oxides have been positioned as the most promising PCFC electrolytes, the design of new protonic conductors with improved properties is of paramount importance. Within the present work, we studied transport properties of scandium-doped barium stannate (Sc-doped BaSnO3). Our analysis included the fabrication of porous and dense BaSn1-xScxO3-δ ceramic materials (0 ≤ x ≤ 0.37), as well as a comprehensive analysis …


Carrier And Microstructure Tuning For Improving The Thermoelectric Properties Of Ag8Snse6 Via Introducing Snbr2, Zhonghai YU, Xiuxia WANG, Chengyan LIU, Yiran CHENG, Zhongwei ZHANG, Ruifan SI, Xiaobo BAI, Xiaokai HU, Jie GAO, Ying PENG, Lei MIAO 2022 Guangxi Key Laboratory of Information Materials, Electronical Information Materials and Devices Engineering Research Center of Ministry of Education, School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China

Carrier And Microstructure Tuning For Improving The Thermoelectric Properties Of Ag8Snse6 Via Introducing Snbr2, Zhonghai Yu, Xiuxia Wang, Chengyan Liu, Yiran Cheng, Zhongwei Zhang, Ruifan Si, Xiaobo Bai, Xiaokai Hu, Jie Gao, Ying Peng, Lei Miao

Journal of Advanced Ceramics

The argyrodite compounds (A(12−n)/mm+Bn+X62−(Am+ = Li+, Cu+, and Ag+; Bn+ = Ga3+, Si4+, Ge4+, Sn4+, P5+, and As5+; and X2-= S2-, Se2-, or Te2-)) have attracted great attention as excellent thermoelectric (TE) materials due to their extremely low lattice thermal conductivity (κl). Among them, Ag8SnSe6-based TE materials have high potential for TE applications. However, the pristine Ag8 …


Fabrication, Microstructure, And Properties Of 8 Mol% Yttria-Stabilized Zirconia (8ysz) Transparent Ceramics, Penghui CHEN, Xiaoying LI, Feng TIAN, Ziyu LIU, Dianjun HU, Tengfei XIE, Qiang LIU, Jiang LI 2022 Key Laboratory of Transparent Opto-functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201899, China;Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China

Fabrication, Microstructure, And Properties Of 8 Mol% Yttria-Stabilized Zirconia (8ysz) Transparent Ceramics, Penghui Chen, Xiaoying Li, Feng Tian, Ziyu Liu, Dianjun Hu, Tengfei Xie, Qiang Liu, Jiang Li

Journal of Advanced Ceramics

Fine grained 8 mol% yttria-stabilized zirconia (8YSZ) transparent ceramics with high optical and mechanical properties were fabricated by air pre-sintering and hot isostatic pressing (HIP) using commercial 8YSZ powders as the raw material. The pre-sintered ceramics with fine grains and appropriate relative density play a key role to achieve high transparency and suppressed grain size after HIP post-treatment at relatively low temperatures. With the increase of HIP temperature from 1350 to 1550 ℃, the in-line transmittance of 8YSZ ceramics at 600 nm increases from 56.9% to 71.5% (2.5 mm in thickness), and the average grain size increases from 2.4 to …


Robust Joule-Heating Ceramic Reactors For Catalytic Co Oxidation, Fangsheng LIU, Zhibo ZHAO, Yuyao MA, Yi GAO, Jiajie LI, Xun HU, Zhengmao YE, Yihan LING, Dehua DONG 2022 School of Materials Science and Engineering, University of Jinan, Jinan 250022, China

Robust Joule-Heating Ceramic Reactors For Catalytic Co Oxidation, Fangsheng Liu, Zhibo Zhao, Yuyao Ma, Yi Gao, Jiajie Li, Xun Hu, Zhengmao Ye, Yihan Ling, Dehua Dong

Journal of Advanced Ceramics

Joule-heating reactors have the higher energy efficiency and product selectivity compared with the reactors based on radiative heating. Current Joule-heating reactors are constructed with electrically-conductive metals or carbon materials, and therefore suffer from stability issue due to the presence of corrosive or oxidizing gases during high-temperature reactions. In this study, chemically-stable and electrically-conductive (La0.80Sr0.20)0.95FeO3 (LSF)/Gd0.1Ce0.9O2 (GDC) ceramics have been used to construct Joule-heating reactors for the first time. Taking the advantage of the resistance decrease of the ceramic reactors with temperature increase, the ceramic reactors heated under current …


Pyrochlore-Based High-Entropy Ceramics For Capacitive Energy Storage, Yiying CHEN, Junlei QI, Minhao ZHANG, Zixi LUO, Yuan-Hua LIN 2022 State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China

Pyrochlore-Based High-Entropy Ceramics For Capacitive Energy Storage, Yiying Chen, Junlei Qi, Minhao Zhang, Zixi Luo, Yuan-Hua Lin

Journal of Advanced Ceramics

High-performance dielectrics are widely used in high-power systems, electric vehicles, and aerospace, as key materials for capacitor devices. Such application scenarios under these extreme conditions require ultra-high stability and reliability of the dielectrics. Herein, a novel pyrochlore component with high-entropy design of Bi1.5Zn0.75Mg0.25Nb0.75Ta0.75O7 (BZMNT) bulk endows an excellent energy storage performance of Wrec≈ 2.72 J/cm3 together with an ultra-high energy efficiency of 91% at a significant enhanced electric field Eb of 650 kV/cm. Meanwhile, the temperature coefficient (TCC) of BZMNT (~ -220 ppm/℃) is also …


Coupling Of Piezocatalysis And Photocatalysis For Efficient Degradation Of Methylene Blue By Bi0.9Gd0.07La0.03Feo3 Nanotubes, Angom Devadatta MANI, Jie LI, Ziquan WANG, Jiale ZHOU, Huaicheng XIANG, Jinlai ZHAO, Libo DENG, Haitao YANG, Lei YAO 2022 Shenzhen Key Laboratory of Special Functional Materials, Shenzhen Engineering Laboratory for Advanced Technology of Ceramics, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518071, China;Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China

Coupling Of Piezocatalysis And Photocatalysis For Efficient Degradation Of Methylene Blue By Bi0.9Gd0.07La0.03Feo3 Nanotubes, Angom Devadatta Mani, Jie Li, Ziquan Wang, Jiale Zhou, Huaicheng Xiang, Jinlai Zhao, Libo Deng, Haitao Yang, Lei Yao

Journal of Advanced Ceramics

Photocatalytic degradation of organic pollutants is of great significance for wastewater remediation but is still hindered by the poor catalytic efficiency of the catalysts. Herein, we report a strategy to simultaneously introduce piezocatalysis and to enhance the intrinsic photocatalysis in a single catalyst, which improved the performance for catalytic degradation of methylene blue (MB) significantly. Specifically, piezoelectric BiFeO3 (BFO) nanotube doped with different contents of Gd and La (Bi0.9(GdxLa1-x)0.1FeO3) were produced by electrospinning. The doping led to a higher concentration of surface oxygen vacancy (OV) in Bi0.9Gd …


Patterned Glass Ceramic Design For High-Brightness High-Color-Quality Laser-Driven Lightings, Qiugui HUANG, Hang LIN, Bo WANG, Shisheng LIN, Pengfei WANG, Ping SUI, Ju XU, Yao CHENG, Yuansheng WANG 2022 Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China;College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350007, China

Patterned Glass Ceramic Design For High-Brightness High-Color-Quality Laser-Driven Lightings, Qiugui Huang, Hang Lin, Bo Wang, Shisheng Lin, Pengfei Wang, Ping Sui, Ju Xu, Yao Cheng, Yuansheng Wang

Journal of Advanced Ceramics

Up-to-date laser-driven lightings confront a challenge of simultaneously achieving good photometric and chromatic performances. Herein, the coupling of "patterned package design" and "phosphor wheel" was proposed and demonstrated effectively to deal with this tough issue, based on a new architecture of CaAlSiN3:Eu2+ (CASN:Eu) glass ceramic film (GCF) on Y3Al5O12:Ce3+ (YAG:Ce) GC plate. The fabricated composite has no interface between the two functional layers and retains the admirable luminescent features from CASN:Eu and YAG:Ce for the microstructural integrity during co-sintering. The studies on laser-microcrystalline interactions reveal that the luminescence saturation is …


High Transparency Pr:Y2O3 Ceramics: A Promising Gain Medium For Red Emission Solid-State Lasers, Qing LI, Ying WANG, Jun WANG, Jie MA, Meng NI, Hui LIN, Jian ZHANG, Peng LIU, Xiaodong XU, Dingyuan TANG 2022 Jiangsu Key Laboratory of Advanced Laser Materials and Devices, School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, China

High Transparency Pr:Y2O3 Ceramics: A Promising Gain Medium For Red Emission Solid-State Lasers, Qing Li, Ying Wang, Jun Wang, Jie Ma, Meng Ni, Hui Lin, Jian Zhang, Peng Liu, Xiaodong Xu, Dingyuan Tang

Journal of Advanced Ceramics

Highly transparent 0.5 and 1.0 at% Pr-doped Y2O3 ceramics were fabricated by vacuum sintering plus hot isostatic pressing (HIP) treatment. The selection of suitable pre-sintering temperatures and right microstructures before HIP was critical to obtain high density of the final sintered bodies. The well-densified ceramics had pore-free microstructures with an average grain size of about 1 μm. It was also found that the charge states of the Pr ions could be changed through regulating the annealing atmospheres, resulting in different absorption and emission characteristics in the visible wavelength region. Annealing in reducing atmosphere (5% H2/95% …


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