| LaCrO_3－NiMn_2O_4复合陶瓷的结构分析 |
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| 引用本文： | 刘树英,周东祥,杨文,张毓武,黄安荣.LaCrO_3－NiMn_2O_4复合陶瓷的结构分析[J].硅酸盐学报,1995(2). |
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| 作者姓名： | 刘树英 周东祥 杨文 张毓武 黄安荣 |
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| 作者单位： | 中国科学院新疆物理研究所，华中理工大学固体电子学系 |
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| 基金项目： | 国家自然科学基金,北京中关村地区联合分析测试中心部分资助 |
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| 摘 要： | 将尖晶石型ＮｉＭｎ＿２Ｏ＿４及钙钛矿型ＬａＣｒＣ＿３这二者电阻个较高的半导体陶瓷热敏材料复合并经高温烧结后，其复合体电阻率大幅度降低。应用ＸＲＤ，ＸＰＳ，ＴＥＭ和ＳＥＭ对复合体结构进行较为系统的研究，结果表明：ＮｉＭｎ＿２Ｏ＿４与ＬａＣｒＯ＿３按一定比例复合后，在烧结过程中两者之间有离子迁移发生，离子迁移的结果使钙钛矿结构的ＬａＣｒＯ＿３转变为高导电相的Ｌａ［Ｃｒ＿（１－ｘ－ｙ）Ｎｉ＿ｘＭＮ＿ｙ］Ｏ＿３（０＜ｙ＜０，０＜ｘ＋ｙ＜０），它使复合体电阻率大幅度降低。
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| 关 键 词： | 铬酸镧，锰酸镍，夏合陶瓷，光电子能谱，晶相结构 |
STRUCTURAL ANALYSIS OF LaCrO_3-NiMO_2O_4 COMPOSITE CERAMICS |
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| Liu Shuying,Zhou Dongxiang,Yang Wen,Zhang Yuwu,Huang Anyong.STRUCTURAL ANALYSIS OF LaCrO_3-NiMO_2O_4 COMPOSITE CERAMICS[J].Journal of The Chinese Ceramic Society,1995(2). |
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| Authors: | Liu Shuying Zhou Dongxiang Yang Wen Zhang Yuwu Huang Anyong |
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| Abstract: | NiMn_2O_4 spinel and LaCrO_3 perovskite are semiconductive ceramic materials which have highresistivity,but the resistivity of the composite ceramics composed of NiMn_2O_4 and LaCrO_3 and sintered at hightemperature reduces significantly. By means of XRD, XPS, TEM and SEM,the microstructure of compositeceramics is studied,it is shown that ion migration exists in the composite ceramics. By ion migration,LaCrO_3perovskite structure changes into(0
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| Keywords: | lanthanurn chromate nickel manganate composite ceramic X-ray photoelectron spectroscopy(XPS) crystal-phase structure |
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