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	Thermal stability and phase transformation of barium orthotitanate (Ba2TiO4)
	Chen, Bo ; Liao, Fu-Hui ; Jiao, Huan ; Jing, Xi-Ping
刊名	phase transitions
	2013
关键词	Ba2TiO4 thermal stability phase transformation doping effect CRYSTAL-STRUCTURE TITANATE ZIRCONIA SYSTEM BA2-XSRXTIO4
DOI	10.1080/01411594.2012.677448
英文摘要	Barium orthotitanate (Ba2TiO4) was prepared by heating at 1250 degrees C for 2h. The thermal stability of Ba2TiO4 and the phase transformation between the low-temperature monoclinic polymorph (-Ba2TiO4) and the high-temperature orthorhombic polymorph (-Ba2TiO4) were examined by X-ray diffraction. Ba2TiO4 can be corroded by CO2 below 700 degrees C forming BaCO3 and BaTiO3, which is reversible above 750 degrees C. A martensitic transformation from -Ba2TiO4 to -Ba2TiO4 starts at approximate to 100 degrees C and ends at approximate to 220 degrees C in heating process. The transformation hysteresis loop is approximate to 200 degrees C. -Ba2TiO4 can be stabilized to room temperature by doping small amount of aliovalent ion Nd3+ (1.5 mole%) or relatively large amount of isovalent ion Sr2+ (10 mole%). After annealing the doped samples at low temperatures (e.g., below 1100 degrees C), for the Nd-doped sample, -Ba2TiO4 can be partially transformed to -Ba2TiO4, whereas the Sr-doped sample is stably kept as -Ba2TiO4.; Crystallography; Physics, Condensed Matter; SCI(E); EI; 0; ARTICLE; 4; 380-390; 86
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/150772]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Chen, Bo,Liao, Fu-Hui,Jiao, Huan,et al. Thermal stability and phase transformation of barium orthotitanate (Ba2TiO4)[J]. phase transitions,2013.
APA	Chen, Bo,Liao, Fu-Hui,Jiao, Huan,&Jing, Xi-Ping.(2013).Thermal stability and phase transformation of barium orthotitanate (Ba2TiO4).phase transitions.
MLA	Chen, Bo,et al."Thermal stability and phase transformation of barium orthotitanate (Ba2TiO4)".phase transitions (2013).

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