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Full-Text Articles in Mechanical Engineering
Preparation Of La0.8sr0.2ga0.83mg0.17o2.815 Powders By Microwave-Induced Poly(Vinyl Alcohol) Solution Polymerization, Yuling Zhai, Chang Ye, Feng Xia, Jianzhong Xiao, Lei Dai, Yifan Yang, Yongqian Wang
Preparation Of La0.8sr0.2ga0.83mg0.17o2.815 Powders By Microwave-Induced Poly(Vinyl Alcohol) Solution Polymerization, Yuling Zhai, Chang Ye, Feng Xia, Jianzhong Xiao, Lei Dai, Yifan Yang, Yongqian Wang
Dr. Chang Ye
A new and simple chemical route, named microwave-induced poly(vinyl alcohol) (PVA) solution polymerization, has been used to prepare fine, homogeneous and high-density pellets of purer La0.8Sr0.2Ga0.83Mg0.17O2.815 (denoted as LS0.2GM0.17). The effect of different contents of PVA as the polymeric carrier, was studied and we obtained an optimal amount of PVA (1.65:1 ratio of positively charged valences of the cations (Men+) to negatively charged hydroxyl (–OH−) groups of the organics), which could ensure homogenous distribution of the metal ions in the polymeric network structure and inhibit segregation. The behavior of the powder after calcination at different temperatures was studied. The PVA …
A Microwave-Induced Solution-Polymerization Synthesis Of Doped Lagao3 Powders, Yuling Zhai, Chang Ye, Jianzhong Xiao, Lei Dai
A Microwave-Induced Solution-Polymerization Synthesis Of Doped Lagao3 Powders, Yuling Zhai, Chang Ye, Jianzhong Xiao, Lei Dai
Dr. Chang Ye
A new method, called the microwave-induced solution-polymerization synthesis (denoted as MW), and the conventional Pechini (denoted as PH) method have been used to prepare powders of La0.8Sr0.2Ga0.83Mg0.17O2.815 (denoted as LS0.2GM0.17) and La0.8Sr0.2(Ga0.9Co0.1)0.83Mg0.17O2.815(denoted as LS0.2GCM0.17). A higher heating rate and a more homogenous heating manner without thermal gradients in the microwave oven resulted in a pure LSGCM powder after calcination at 1400 °C for 9 hours (h) and purer LSGM (6.2% secondary phases). The grain size of the pellets of the above two powders was 2–3 μm without segregation. The densities of LS0.2GM0.17/MW and LS0.2GCM0.17/MW pellets, sintered at 1400 °C for …