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Sr含量对La1–xSrxMnO3–δ导电陶瓷结构与性能的影响
作者:张小珍 索帅峰 江瑜华 胡学兵 汪永清 周健儿 
单位:景德镇陶瓷大学材料科学与工程学院 江西 景德镇 333403 
关键词:锰酸镧锶 导电陶瓷 电导率 抗弯强度 热膨胀性能 
分类号:TQ174.75
出版年,卷(期):页码:2017,45(9):0-0
DOI:
摘要:

 采用乙二胺四乙酸(EDTA)-柠檬酸络合法合成了钙钛矿结构La1–xSrxMnO3–δ (LSM)粉体,通过干压成型和高温烧结制备了LSM导电陶瓷。研究了Sr含量对制备LSM陶瓷的物相组成、微观结构、烧结特性、电导率、抗弯强度和热膨胀性能等的影响。结果表明:1 425 ℃保温4 h烧成后,未添加Sr的样品组成为斜方晶系LaMnO3–δ,随着Sr含量提高,LSM陶瓷样品物相晶体结构向六方、四方和立方等不同晶系转变。Sr的添加可促进样品烧结致密化,随着Sr含量增加,样品的室温电导率和抗弯强度表现出先升高后降低变化趋势,但Sr含量对热膨胀性能的影响较小。样品在x=0.6时可获得最大电导率131.4 S/cm,而x=0.8时抗弯强度最高,为101.0 MPa。

 
基金项目:
国家自然科学基金(51462012);江西省青年科学基金重大项目(20143ACB21022);江西省教育厅科技落地计划项目(KJLD14076)。
作者简介:
张小珍(1978—),男,博士,副教授。
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