摘要
在ＢＺＮ系陶瓷中，立方焦绿石结构的α相与低对称结构的β相是２个重要的基本物相．以差热分析（ＤＴＡ）与Ｘ射线衍射（ＸＲＤ）分析为研究手段，明确了α相与β相的熔融物性．结果表明：α相是同成分熔融化合物，熔点１１９０℃；β相是异成分熔融化合物，在１１００℃吸热分解为α相与液相．在自然冷却时，发生转熔过程，α相转入熔融液相中，析出β相，转熔温度１１００℃；在淬火冷却时，液相中析出ＢＺＮ系立方萤石相．
Cubic pyrochlore structure phase and low symmetry structure phase are the basic phases of BZN-based ceramics. The melting behavior of phase and phase were explored by means of DTA and XRD. The results show that BZN-based phase is a congruent compound and the congruent point is 1 190 . BZN-based phase is an incongruent compound, decomposing into phase and liquid phase when absorpted with heat at the incongruent melting point (peritectic temperature) 1 100 . In cooling, phase reacts with liquid phase to form phase by peritectic reaction. In quenching, BZN-based cubic fluorite phase precipitates in the liquid phase.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
1999年第3期362-364,共3页
Journal of The Chinese Ceramic Society
基金
国家863计划新材料领域资助
关键词
熔融物性
BZN
陶瓷
氧化物陶瓷
melting behavior, congruent compound, incongruent compound, peritectic reaction
