| 微波水热法制备KNbO3粉体及其性能研究（英文） |
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| 引用本文： | 秦波,谈国强,苗鸿雁,夏傲,程蕾.微波水热法制备KNbO3粉体及其性能研究（英文）[J].无机材料学报,2011(8):892-896. |
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| 作者姓名： | 秦波 谈国强 苗鸿雁 夏傲 程蕾 |
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| 作者单位： | 陕西科技大学教育部轻化工助剂化学与技术重点实验室; |
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| 基金项目： | National Natural Science Foundation of China(50872077); Natural Science Foundation Research Project of Shaanxi Province(SJ08E104,2010JM6013); Foundation of Shaanxi University of Science and Technology(SUST-A04,ZX08-11) |
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| 摘 要： | 以氢氧化钾(KOH)和五氧化二铌(Nb2O5)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(KNbO3).当KOH浓度在10~14mol/L时,可以制备出纯相的KNbO3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,KNbO3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Nb2O5杂相.常压烧结制备了KNbO3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℃.
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| 关 键 词： | 铌酸钾 微波水热 压电性能 介电性能 |
Study on Microwave-assisted Hydrothermal Synthesis and the Properties of KNbO_3 Powders |
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| QIN Bo,TAN Guo-Qiang,MIAO Hong-Yan,XIA Ao,CHENG Lei.Study on Microwave-assisted Hydrothermal Synthesis and the Properties of KNbO_3 Powders[J].Journal of Inorganic Materials,2011(8):892-896. |
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| Authors: | QIN Bo TAN Guo-Qiang MIAO Hong-Yan XIA Ao CHENG Lei |
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| Affiliation: | QIN Bo,TAN Guo-Qiang,MIAO Hong-Yan,XIA Ao,CHENG Lei(Key Laboratory of Auxiliary Chemistry & Technology for Chemical Industry,Ministry of Education,Shaanxi University of Science and Technology,Xi'an 710021,China) |
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| Abstract: | |
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| Keywords: | KNbO3 microwave-assisted hydrothermal synthesis piezoelectric dielectric |
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