Study on Microwave-assisted Hydrothermal Synthesis and the Properties of KNbO3 Powders
Source abstract
Abstract
以氢氧化钾(KOH)和五氧化二铌(Nb 2 O 5 )为原料, 通过微波水热法在200℃下合成出具有不同晶相、形貌的铌酸钾粉体(KNbO 3 ). 当KOH浓度在10~14mol/L时, 可以制备出纯相的KNbO 3 粉体. X射线衍射(XRD)、场发射扫描电镜(FESEM)和透射电镜(TEM)分析可知, KOH浓度由10mol/L增大到15mol/L时, KNbO 3 粉体由斜方六面体变为正交相, 再转变为四方相, 对应的形貌也由金字塔状变为棒状, 再转变为立方状. 当KOH浓度增大到15mol/L时, 出现了Nb 2 O 5 杂相. 常压烧结制备了KNbO 3 陶瓷, 其介电常数达到302, 介电损耗为0.023, 压电常数达到80 pC/N, 平面机电耦合系数为0.17, 机械品质因数为70, 居里温度为420℃, 正交?四方相变温度为223℃.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Ferroelectric and Piezoelectric Materials · Microwave Dielectric Ceramics Synthesis · Advanced ceramic materials synthesis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (19)
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