CAJ | 학술논문

低对称β相陶瓷是BZN系陶瓷的基本物相之一。本工作以粉末XRD分析和断面SEM分析为研究手段，采用不同的冷却方式以及不同承烧垫板，研究了BZN系低对称β相陶瓷在1 100℃附近的熔融分解、转熔等相转变行为以及相应的显微结构变化。研究表明，低对称β相是异成分熔融化合物，在1 100℃吸热分解为a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；在淬火冷却时，液相中析出BZN系立方萤石相。对应于低对称β相陶瓷在转熔温度1 100℃附近的熔融分解、转熔等相转变行为，其显微结构也表现出相应的显著变化。
저대칭β상도자시BZN계도자적기본물상지일。본공작이분말XRD분석화단면SEM분석위연구수단，채용불동적냉각방식이급불동승소점판，연구료BZN계저대칭β상도자재1 100℃부근적용융분해、전용등상전변행위이급상응적현미결구변화。연구표명，저대칭β상시이성분용융화합물，재1 100℃흡열분해위a상여액상；재자연냉각시，발생전용과정，α상전입용융액상중，석출β상；재쉬화냉각시，액상중석출BZN계립방형석상。대응우저대칭β상도자재전용온도1 100℃부근적용융분해、전용등상전변행위，기현미결구야표현출상응적현저변화。
Low symmetryβ phase is one of the basic phases of BZN-based ceramics. In this paper, the phase transition and microstructure of β phase were explored under different conditions at about 1 100 ℃ with the help of XRD and SEM. The results show that BZN-based low symmetry β phase is an incongruent compound, dissociating to form α phase and liquid phase with absorption of heat, at peritectic temperature of 1 100 ℃. On cooling, the α phase reacts with liquid phase to form β phase by peritectic reaction. On quenching, BZN- based cubic fluorite phase precipitates from the liquid phase. The observable microstructure changes of phase correspond to the phase transition at about 1 100 ℃.