BiFeO3粉体的固相合成及其微观结构研究
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国家“八六三”计划基金资助项目(2013AA031202);北京市自然科学基金资助项目(3122013);北京市教育委员会科技计划基金资助项目(KM201210009004);北京市属高等学校高层次人才引进与培养计划基金资助项目(CIT&TCD20130301)

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Microstructure Study on Bismuth Ferrite Synthesized by SolidState Reaction
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    摘要:

    采用固相反应法制备了BiFeO3陶瓷粉体,研究了BiFeO3粉体在不同煅烧条件下的相结构与微观形貌的演变。结果表明,过低的煅烧温度和过短的煅烧时间得到的产物以杂相Bi25FeO40为主,提高煅烧温度和延长煅烧时间使杂相逐渐减少,有效地促进BiFeO3相的合成,但过高的煅烧温度和过长的煅烧时间则生成大量杂相Bi2Fe4O9并出现颗粒异常团聚及长大现象,800 ℃、1 h为最佳的煅烧条件。另外,利用稀硝酸可有效清除产物中的杂相,获得较均匀、纯净的BiFeO3粉体,有利于进一步研究和应用。

    Abstract:

    The Bismuth ferrite (BiFeO3) ceramic powders were synthesized by solidstate reaction method. The evolution of phase structure and micromorphology of BiFeO3 powders at various calcining conditions were investigated.Results showed that the dominated impurity phase Bi25FeO40 was observed at low calcining temperature and short calcining time. With increasing calcining temperature and time,the impurity phase was reduced and the BiFeO3 phase was significantly increased.However, when the calcining temperature was too high or the calcining time was too long, a large number of impurity phase Bi2Fe4O9 was presented and the agglomeration and abnormal growth of particle was observed.800 ℃ and 1 h was found to be the optimum reaction condition.In addition, dilute nitric acid was used to eliminate the impurity phase in products and the relatively uniform and pure BiFeO3 powder could be obtained for further study and application.

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王大伟,张旭,王美丽,秦继,赵全亮,崔岩. BiFeO3粉体的固相合成及其微观结构研究[J].压电与声光,2014,36(4):541-543. WANG Dawei, ZHANG Xu, WANG Meili, QIN Ji, ZHAO Quanliang, CUI Yan. Microstructure Study on Bismuth Ferrite Synthesized by SolidState Reaction[J]. PIEZOELECTRICS AND ACOUSTOOPTICS

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  • 在线发布日期: 2014-07-22
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