Porous microstructure modification of La_{1 鈭?#xa0;x}Sr_xCoO₃ (0 鈮?#xa0;x 鈮?#xa0;1) ceramics via Sr content

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• 作者：Yong Wang^a ; Lan Yu^a ; ^{yulan000@hotmail.com} ; Jianhua Wang^a ; Liangwei Chen^a ; Wengui Gao^b ; Xiaoli Du^a ; Linhai Biao^a
• 关键词：Ceramics ; Microstructure
• 刊名：Materials Letters
• 出版年：2012
• 期刊代码：59_0167577x
• 类别：ms
• 出版时间：15 May, 2012
• 卷：75
• 期：Complete
• 页码：39-41
• 文件大小：628 K

摘要

La_{1 鈭?#xA0;x}Sr_xCoO₃ (0 鈮?#xA0;x 鈮?#xA0;1) ceramics have been prepared by a solid-state reaction method. Crystal structure has been checked by X-ray diffraction and the results indicate that the rhombohedral phase of La_{1 鈭?#xA0;x}Sr_xCoO₃ turns into cubic phase in the range of Sr content x = 0.3-0.4, and the lattice parameter continually increases with increasing Sr content. La_{1 鈭?#xA0;x}Sr_xCoO₃ (x 鈮?#xA0;0.8) ceramics with cubic phases have been synthesized in air. Microstructure analysis shows that both the grain size and the pore size enlarge, the grains are more well-bonded and the quantity of grain boundaries becomes small with increasing Sr content. The change of porous microstructure with different Sr content has been discussed preliminarily.