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- Shi Xue Dou (4)
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Articles 1 - 30 of 124
Full-Text Articles in Science and Technology Studies
Improved Hydrogen Storage Properties Of Mgh2 Doped With Chlorides Of Transition Metals Hf And Fe, M Ismail Ismail, Yue Zhao, Xuebin Yu, S X. Dou
Improved Hydrogen Storage Properties Of Mgh2 Doped With Chlorides Of Transition Metals Hf And Fe, M Ismail Ismail, Yue Zhao, Xuebin Yu, S X. Dou
Shi Xue Dou
The effects of HfCl4 and FeCl3 addition on the de/rehydrogenation properties of MgH2 were investigated. Both HfCl4 and FeCl3-doped MgH2 samples started to released hydrogen at about 270 °C, a decreased of about 70 °C and about 140 °C compared to as-milled and as-received MgH2, respectively. In terms of the desorption kinetics, the HfCl4-doped MgH2 sample showed significant improvement, with 6.0 wt.% hydrogen released within 10 min at 300 °C, while the FeCl3-doped MgH2 and undoped MgH2 samples released 3.5 and 0.2 wt.% hydrogen, respectively, under the same conditions. In terms of the absorption kinetics, 5.5 wt.% hydrogen was charged …
Electrospun P2-Type Na 2/3 (Fe 1/2 Mn 1/2 )O 2 Hierarchical Nano Fibers As Cathode Material For Sodium-Ion Batteries, Sujith Kalluri, Kuok Hau Seng, Wei Kong Pang, Zaiping Guo, Zhixin Chen, Hua-Kun Liu, S X. Dou
Electrospun P2-Type Na 2/3 (Fe 1/2 Mn 1/2 )O 2 Hierarchical Nano Fibers As Cathode Material For Sodium-Ion Batteries, Sujith Kalluri, Kuok Hau Seng, Wei Kong Pang, Zaiping Guo, Zhixin Chen, Hua-Kun Liu, S X. Dou
Shi Xue Dou
Sodium-ion batteries can be the best alternative to lithium-ion batteries, because of their similar electrochemistry, nontoxicity, and elemental abundance and the low cost of sodium. They still stand in need of better cathodes in terms of their structural and electrochemical aspects.
Large Piezoelectric Coefficient And Ferroelectric Nanodomain Switching In Ba(Ti0.80zr0.20)O3-0.5(Ba0.70ca 0.30)Tio3 Nanofibers And Thin Films, A Jalalian, A Grishin, Xiaolin Wang, Zhenxiang Cheng, S X. Dou
Large Piezoelectric Coefficient And Ferroelectric Nanodomain Switching In Ba(Ti0.80zr0.20)O3-0.5(Ba0.70ca 0.30)Tio3 Nanofibers And Thin Films, A Jalalian, A Grishin, Xiaolin Wang, Zhenxiang Cheng, S X. Dou
Shi Xue Dou
Currently available low-dimensional piezoelectric materials show a low piezoelectric coefficient d33 of merely 100 pm V-1 with Pb(Zr, Ti)O3-based materials at the high end. Here, we report very large piezoelectricity in Ba(Ti0.80Zr0.20)O 3-0.5(Ba0.70Ca0.30)TiO3 (BTZ-0.5BCT) lead-free nanostructures sintered as thin films (d33 = 140 pm V -1) and nanofibers (d33 = 180 pm V-1). The influences of lateral size, geometry, and the clamping effect on the piezoelectric performance were investigated for both thin films and nanofibers. Combining a high piezoelectric coefficient with environmental benefits, the BTZ-0.5BCT nanostructures provide the superior functions sought for highly efficient piezoelectric devices and electromechanical systems. 2014 …
Alternative Al Production Methods: Part 2 - Thermodynamic Analyses Of Indirect Carbothermal Routes, M A. Dewan, M A. Rhamdhani, G A. Brooks, B J. Monaghan, L Prentice
Alternative Al Production Methods: Part 2 - Thermodynamic Analyses Of Indirect Carbothermal Routes, M A. Dewan, M A. Rhamdhani, G A. Brooks, B J. Monaghan, L Prentice
Brian Monaghan
It has been widely claimed that direct and indirect carbothermic reduction of alumina for the production of aluminium have the potential to consume less energy, generate fewer perfluorocarbons and have lower total greenhouse gas emissions compared to the Hall-He´ roult process. A review of alternative aluminium production techniques focusing on the indirect carbothermal reduction routes has been presented in the Part 1 paper. In this Part 2 paper, systematic thermodynamic analyses of indirect carbothermal reduction routes are presented. These include the analyses of the Stage 1 of the process where alumina is converted to intermediate aluminium compounds before they are …
Blast Furnace Hearth Refractory And Coke Ash Mineral Interactions, P B. Drain, M W. Chapman, R J. Nightingale, B J. Monaghan
Blast Furnace Hearth Refractory And Coke Ash Mineral Interactions, P B. Drain, M W. Chapman, R J. Nightingale, B J. Monaghan
Brian Monaghan
In the blast furnace hearth the calcium aluminate by-products of coke dissolution can react with the hearth refractories. Reactions between these coke ash minerals and the aluminosilicate and alumina-carbon hearth refractories may result in increased refractory wear reducing the blast furnace campaign life. Hence improved understanding of these interactions may have implications for the campaign life of the blast furnace hearth refractory materials. The interactions between the coke ash minerals and aluminosilicate hearth refractory have been assessed by heating samples of calcium aluminates (CA, CA2 & CA6) coupled with aluminosilicate refractory to temperatures representative of the blast furnace hearth (1450 …
Thermodynamic Considerations Of The Corrosion Of Nickel Ferrite Refractory By Na3alf6-Alf3-Caf2-Al 2o3 Bath, Raymond Longbottom, Sharon Nightingale, Brian Monaghan
Thermodynamic Considerations Of The Corrosion Of Nickel Ferrite Refractory By Na3alf6-Alf3-Caf2-Al 2o3 Bath, Raymond Longbottom, Sharon Nightingale, Brian Monaghan
Brian Monaghan
Thermodynamic analysis was carried out to interpret the results of corrosion testing of nickel ferrite samples in cryolite-based baths. The equilibrium between cryolite-based baths and nickel ferrite was considered. Isopleths between cryolite-based baths and nickel ferrite confirmed that for the temperature range of interest (1223-1273 K) there was limited solubility of nickel ferrite in the bath. To better understand the formation of the metal from nickel ferrite, the effect of reducing potentials on nickel ferrite and nickel ferrite-cryolite-based bath systems were considered. The formation of a metal phase was predicted at relatively high pO2. The metal phase was nickel-rich at …
Flow Of Molten Slag Through Coke Channels, Hazem Labib George, Brian Joseph Monaghan, Raymond James Longbottom, Sheng Jason Chew, Peter Richard Austin
Flow Of Molten Slag Through Coke Channels, Hazem Labib George, Brian Joseph Monaghan, Raymond James Longbottom, Sheng Jason Chew, Peter Richard Austin
Brian Monaghan
In the lower zone of the iron making blast furnace, liquid iron and slag descend counter-current to reducing gases through a packed bed of coke. The characteristics of the flow of these liquids and their holdup influence product quality and furnace operation. The present study aimed to establish the criteria for the passage of slag through the narrow pore necks that form between coke particles. The flow of slag through coke pore necks has been simulated using an experimental technique that assesses slag flow from a funnel entering a narrow channel of known diameter. Synthetic coke was mainly used to …
Alternative Al Production Methods: Part 1 - A Review Of Indirect Carbothermal Routes, M A. Rhamdhani, M A. Dewan, G A. Brooks, B J. Monaghan, L Prentice
Alternative Al Production Methods: Part 1 - A Review Of Indirect Carbothermal Routes, M A. Rhamdhani, M A. Dewan, G A. Brooks, B J. Monaghan, L Prentice
Brian Monaghan
The production of Al from its ores at present relies on the Bayer (alumina production) and the Hall- Heroult (Al production) process. The cost associated with alumina production and apparent disadvantages of the Hall-Heroult process have led to intensive research to find alternative routes for Al production. The direct carbothermal reduction process has been thoroughly investigated as an alternative technique. Another alternative includes the indirect carbothermal reduction route where alumina (or aluminous ores) is first reduced to intermediate Al compounds before reduced further to Al. The present study reviews and provides systematic thermodynamic analyses of alternative Al production routes. In …
The Dynamic Wetting Characteristics Of Ladle Slags On Spinel, Hamed Abdeyazdan, Neslihan Dogan, Muhammad Rhamdhani, Michael W. Chapman, Brian Monaghan
The Dynamic Wetting Characteristics Of Ladle Slags On Spinel, Hamed Abdeyazdan, Neslihan Dogan, Muhammad Rhamdhani, Michael W. Chapman, Brian Monaghan
Brian Monaghan
Inclusion removal by slag is primarily achieved by optimizing process conditions that promote slag contact with the inclusion. For efficient inclusion removal the inclusions must adhere to the slag phase. The strength of the attachment can be characterised by the wettability of the slag on the inclusions.
Behaviour Of New Zealand Ironsand During Iron Ore Sintering, Zhe Wang, Harold Rogers, David Pinson, Brian J. Monaghan, Sheng Chew, Paul Zulli, Sharon Nightingale, Guangqing Zhang
Behaviour Of New Zealand Ironsand During Iron Ore Sintering, Zhe Wang, Harold Rogers, David Pinson, Brian J. Monaghan, Sheng Chew, Paul Zulli, Sharon Nightingale, Guangqing Zhang
Brian Monaghan
Titanium-bearing burdens are commonly introduced into blast furnaces to protect the hearlh because the so-called "titanium bear" which is a precipitate of carbide, nitride and carbonitride of titanium may form in the blast furnace hearth if Ti02 is present in the feed [1 , 2J. New Zealand ironsand is a titanomagnetite, containing around 60 wt.% iron, 8 wt.% titanium and other substances such as silica, phosphorus and lime [3, 4]. Since it is competitive in price, introduction of the ironsand into the ferrous feed can reduce the production cost and potentially increase blast furnace campaign life. An appropriate method of …
Inclusion Reactivity: Morphology And Composition Changes Of Spinel (Mgal2o4) In Steel, Neslihan Dogan, Raymond Longbottom, Mark Henry Reid, Michael W. Chapman, Paton Wilson, Les Moore, Brian Monaghan
Inclusion Reactivity: Morphology And Composition Changes Of Spinel (Mgal2o4) In Steel, Neslihan Dogan, Raymond Longbottom, Mark Henry Reid, Michael W. Chapman, Paton Wilson, Les Moore, Brian Monaghan
Brian Monaghan
Due to an ever increasing demand for cleaner, high quality steels, there is an increasing push for steelmakers to lower the non-metallic inclusion contents of the steel they produce. Understanding inclusion reactivity in steel is key in producing high quality steels at high production rates. Our current knowledge in controlling and predicting inclusion development during liquid steel processing is limited. In this study, spinel (MgAI204) inclusions of close to stoichiometric MgO.AI2O3 and known size distribution where added to the liquid steel bath prior to assessing their reactivity. The pO2 of the gas phase was controlled to 10-13 atm throughout the …
Interfacial Assessment Of Cao-Al2o3-Sio2-Mgo Slags On Mgal2o4 Spinel, Hamed Abdeyazdan, Neslihan Dogan, M Akbar Rhamdhani, Michael Chapman, Brian J. Monaghan
Interfacial Assessment Of Cao-Al2o3-Sio2-Mgo Slags On Mgal2o4 Spinel, Hamed Abdeyazdan, Neslihan Dogan, M Akbar Rhamdhani, Michael Chapman, Brian J. Monaghan
Brian Monaghan
Steel cleanness is an important and growing research area driven by the demands to produce high quality steel. Lowering the inclusion content in steel is an important criterion for clean steel. It is therefore important to better understand the interaction between inclusions and slag to improve the removability of inclusions from liquid steel. For efficient inclusion removal the inclusions must attach/bond with the slag phase. The strength of the attachment can be characterised by the wettability of the slag on the inclusions. In this study, the dynamic wetting of ladle slags of the CaO-Al2O3-SiO2- MgO system on a solid spinel …
Strength And Bonding In Reduced Ironsand-Coal Compacts, R J. Longbottom, B J. Monaghan, S A. Nightingale, J G. Mathieson
Strength And Bonding In Reduced Ironsand-Coal Compacts, R J. Longbottom, B J. Monaghan, S A. Nightingale, J G. Mathieson
Brian Monaghan
In this investigation, the strength and bonding within reduced ironsand-coal compacts were studied, with the aim of better understanding the binding mechanisms in the reduced compacts and, based on this understanding, to improve their strength. Ironsand ore and sub-bituminous coal were mixed and pressed into compacts, which were reduced by heating in a thermogravimetric furnace to temperatures between 1273 and 1573 K under argon. The progress of the reaction was monitored by measuring the weight loss with time. The reduced compacts were found to have low strength in compression testing. The main form of bonding between the reduced ironsand particles …
Modeling Of Thin Strip Profile During Cold Rolling On Roll Crossing And Shifting Mill, A Aljabri, Z Y. Jiang, D B. Wei, X D. Wang, H Tibar
Modeling Of Thin Strip Profile During Cold Rolling On Roll Crossing And Shifting Mill, A Aljabri, Z Y. Jiang, D B. Wei, X D. Wang, H Tibar
Abdulrahman Daifullah Aljabri
Strip profile control in cold rolling of thin strip is a difficult and challenge problem found in industry. Currently using the novel type of strip rolling mill, such as the work roll crossing and shifting is the one of the main methods to control the strip profile quality in cold rolling. In this paper, 3-D finite element simulation models of the thin strip profile in cold rolling for the work roll crossing and shifting system were successfully developed. The strip profile and edge drop are discussed considering both crossing angle and shifting value of the work rolls. The research shows …
Analysis Of Thin Strip Profile During Asymmetrical Cold Rolling With Roll Crossing And Shifting Mill, Abdulrahman Aljabri, Zhengyi Jiang, Dongbin Wei
Analysis Of Thin Strip Profile During Asymmetrical Cold Rolling With Roll Crossing And Shifting Mill, Abdulrahman Aljabri, Zhengyi Jiang, Dongbin Wei
Abdulrahman Daifullah Aljabri
Strip profile control during rolling is required to assure the dimensional quality of rolled thin strip is acceptable for customers. Throughout rolling, the strip profile is controlled by using the advanced shape control rolling mill, such as the combination of work roll crossing and shifting during asymmetrical rolling, the one of the valuable methods to control the strip profile quality in rolling process. In this paper, the influences of cold rolling parameters such as the crossing angle and axial shifting value of work rolls on the strip profile are analysed. The strip shape control is discussed under both symmetrical and …
Thin Strip Profile Control Capability Of Roll Crossing And Shifting In Cold Rolling Mill, Abdulrahman Aljabri, Zhengyi Jiang, Dongbin Wei, Xiaodong Wang, Hassan Tibar
Thin Strip Profile Control Capability Of Roll Crossing And Shifting In Cold Rolling Mill, Abdulrahman Aljabri, Zhengyi Jiang, Dongbin Wei, Xiaodong Wang, Hassan Tibar
Abdulrahman Daifullah Aljabri
Controlling cold strip profile is a difficult and significant problem has been found in industry during thin strip rolling. At present choosing the new type of strip rolling mill is the one of main methods to control the strip shape quality in cold rolling. The influences of rolling process parameters such as the work roll cross angle and work roll shifting on the strip shape and profile of thin strip are recognised throughout this study. The results show that the roll crossing and shifting is efficient way to control the strip shape. The increase of the work roll crossing angle …
Vessel Traffic Service (Vts): A Maritime Information Service Or Traffic Control System? Understanding Everyday Performance And Resilience In A Socio-Technical System Under Change, Gesa Praetorius
Gesa Praetorius
Vessel Traffic Service (VTS) is a shore-side maritime assistance service that supports bridge teams in their safe navigation of port approaches and other areas that present navigational difficulties. The VTS is implemented in national waters and provides vessels with information through transmissions and broadcasts on Very High Frequency (VHF) radio. With a continued growth in the number, size and cargo volumes of merchant vessels, the role of the VTS has recently become a matter of discussion, and it has been argued that changes, such as implementing an aviation-like control system, would be of an enormous benefit for stakeholders and guarantee …
The Asian Evolution Of High Speed Rail, Philip G. Laird
The Asian Evolution Of High Speed Rail, Philip G. Laird
Dr Philip Laird
In Australia, in 2001, the Howard government released an East Coast HSR Scoping Study. This followed two major investigations by the private sector into HSR options for Australia; the first being a Sydney Canberra Melbourne Very Fast Train as proposed in 1984 by CSIRO, and the second being the Sydney Canberra Speed HSR proposal.
Too Many Loads On Our Roads When Rail Is The Answer, Philip Laird
Too Many Loads On Our Roads When Rail Is The Answer, Philip Laird
Dr Philip Laird
“Without trucks, Australia stops” is now a fact of modern life. But when all costs are considered, road freight is an expensive way of moving large amounts of freight. And, as shown by ongoing fatal crashes involving large trucks, road freight can also be dangerous. The main beneficiaries of road freight are not the truck drivers who work hard in a dangerous occupation, but the companies that choose to consign large quantities of freight by road. Road freight has seen strong growth, in part, due to good service levels and major road improvements that include highways with dual carriageways and …
Railroad Privatization And Deregulation: Lessons From Three Decades Of Experience Worldwide, Randolph Resor, Philip Laird
Railroad Privatization And Deregulation: Lessons From Three Decades Of Experience Worldwide, Randolph Resor, Philip Laird
Dr Philip Laird
Railroads exist worldwide, on all inhabited continents. The rail industry began nearly 200 years ago as a series of privately financed ventures in the United Kingdom and the United States, but the ownership model rapidly evolved during the 19th Century. By the middle of the 20th Century, railroads in most parts of the world were government-owned.
A Balanced Approach Is Needed For Sydney - Brisbane Freight, Philip Laird
A Balanced Approach Is Needed For Sydney - Brisbane Freight, Philip Laird
Dr Philip Laird
No abstract provided.
High Speed Rail In Australia - Much Studied And Slow To Start, Philip Laird
High Speed Rail In Australia - Much Studied And Slow To Start, Philip Laird
Dr Philip Laird
High Speed Rail or HSR with electric passenger trains operating at speeds of 250km/h or more is now operational in 11 countries and has been under recent consideration in Australia for future operation between Melbourne, Canberra, Sydney and Brisbane. The paper outlines HSR studies in Australia and conditionally quantifies the potential reduction of aviation fuel use at up to 0.5m litres per annum from the introduction of HSR by 2020 in Australia with a reduction of external costs at $540m per annum by 2020. In addition, HSR in Eastern Australia by 2020 could allow for some 300 slots to be …
Shifting Freight To Rail Could Make The Pacific Highway Safer, Philip G. Laird
Shifting Freight To Rail Could Make The Pacific Highway Safer, Philip G. Laird
Dr Philip Laird
Articulated trucks such as semi-trailers and "B-Doubles" are involved in about 30% of fatal road accidents on the Pacific Highway. As the number of trucks carrying freight between Sydney and Brisbane increases, we will see more tragic incidents like the fatal crash involving a B-Double on 8 January 2012 near Urunga.
Faster Out Of The Station: Asia Surges Ahead On Rail, Philip Laird
Faster Out Of The Station: Asia Surges Ahead On Rail, Philip Laird
Dr Philip Laird
It is interesting to see the progressmade by Asian countries since 2001 in developing high-speed rail (HSR),while Australia is missing out.
Government Rail Asset Sales, And Return To The Public Sector, In New Zealand And Tasmania, Philip G. Laird
Government Rail Asset Sales, And Return To The Public Sector, In New Zealand And Tasmania, Philip G. Laird
Dr Philip Laird
The paper outlines the sale, with a track lease, in 1993 of the state owned New Zealand Railways Corporation to a consortium, TranzRail Holdings formed by the United States and New Zealand interests. It also notes increases in productivity and traffic levels to 1999 with subsequent problems leading to the New Zealand Government agreeing in 2003 to repurchase and rehabilitate the track. The paper then outlines transfer of effective ownership of the trains and related services in 2003 to an Australian company, and in 2008 back to the New Zealand Government at appreciable net cost.After a brief outline of railways …
Column Experiments Carried Out For The Treatment Of Acidic Groundwater In Acid Sulfate Soil Terrain At The Shoalhaven Floodplain, Buddhima Indraratna, Punyama Pathirage, Laura Banasiak, Long Nghiem
Column Experiments Carried Out For The Treatment Of Acidic Groundwater In Acid Sulfate Soil Terrain At The Shoalhaven Floodplain, Buddhima Indraratna, Punyama Pathirage, Laura Banasiak, Long Nghiem
Laura J Banasiak Dr
No abstract provided.
Coupled Hydro-Geochemical Modelling Of A Permeable Reactive Barrier For Treating Acidic Groundwater, Buddhima Indraratna, Punyama Pathirage, Kerry Rowe, Laura Banasiak
Coupled Hydro-Geochemical Modelling Of A Permeable Reactive Barrier For Treating Acidic Groundwater, Buddhima Indraratna, Punyama Pathirage, Kerry Rowe, Laura Banasiak
Laura J Banasiak Dr
This study focuses on coupling geochemistry with geo-hydraulics to enable time-dependent modelling of the remediation of acidic groundwater using an alkaline permeable reactive barrier (PRB). Chemical clogging due to secondary mineral precipitates reduces the porosity and hydraulic conductivity of the reactive medium. The governing equations are incorporated into commercial numerical codes, MODFLOW and RT3D. An original algorithm was developed for RT3D to simulate geochemical reactions occurring in the PRB. The results and the model predictions are in agreement, confirming that the hydraulic conductivity reduction due to mineral precipitation occurs at the start of permeation and continues until halfway through the …
Remediation Of Acidic Groundwater From Acid Sulfate Soil Terrain By Permeable Reactive Barrier Technology, Laura Banasiak, Buddhima Indraratna
Remediation Of Acidic Groundwater From Acid Sulfate Soil Terrain By Permeable Reactive Barrier Technology, Laura Banasiak, Buddhima Indraratna
Laura J Banasiak Dr
No abstract provided.
An Outlier Robust Block Bootstrap For Small Area Estimation, Payam Mokhtarian, Ray Chambers
An Outlier Robust Block Bootstrap For Small Area Estimation, Payam Mokhtarian, Ray Chambers
Payam Mokhtarian
Small area inference based on mixed models, i.e. models that contain both fixed and random effects, are the industry standard for this field, allowing between area heterogeneity to be represented by random area effects. Use of the linear mixed model is ubiquitous in this context, with maximum likelihood, or its close relative, REML, the standard method for estimating the parameters of this model. These parameter estimates, and in particular the resulting predicted values of the random area effects, are then used to construct empirical best linear unbiased predictors (EBLUPs) of the unknown small area means. It is now well known …
I-125 Ropes Eye Plaque Dosimetry: Validation Of A Commercial 3d Ophthalmic Brachytherapy Treatment Planning System And Independent Dose Calculation Software With Gafchromic Ebt3 Films, Joel Poder, Stephanie Corde
I-125 Ropes Eye Plaque Dosimetry: Validation Of A Commercial 3d Ophthalmic Brachytherapy Treatment Planning System And Independent Dose Calculation Software With Gafchromic Ebt3 Films, Joel Poder, Stephanie Corde
Stéphanie Corde
Purpose: The purpose of this study was to measure the dose distributions for different Radiation Oncology Physics and Engineering Services, Australia (ROPES) type eye plaques loaded with I-125 (model 6711) seeds using GafChromic R EBT3 films, in order to verify the dose distributions in the Plaque SimulatorTM (PS) ophthalmic 3D treatment planning system. The brachytherapy module of RADCALC R was used to independently check the dose distributions calculated by PS. Correction factors were derived from the measured data to be used in PS to account for the effect of the stainless steel ROPES plaque backing on the 3D dose distribution. …