SPS制备纳米晶Bi_(0.75)Er_(0.25)O_(1.5)固体电解质  

Preparation of Bi_(0.75)Er_(0.25)O_(1.5) nanocrystalline solid electrolyte by SPS

作　　者：李榕[1,2] 甄强[1,3] 袁强[3] Michel Drache Rose-Noelle Vannier 鲁雄刚[1] 

机构地区：[1]上海大学材料科学与工程学院,上海200444 [2]法国里尔科技大学固体化学与催化国家实验室,法国里尔59652 [3]上海大学纳米科学与技术研究中心,上海200444

出　　处：《功能材料》2010年第11期1857-1860,共4页Journal of Functional Materials

基　　金：教育部重点资助项目(208043);上海市教委重点资助项目(07zz10);白玉兰科技人才基金资助项目(2008B049);上海市教育委员会重点学科建设资助项目(J50102);中国人民解放军总装备部武器装备预研基金资助项目(9140C5601010701;9140C5601010801)

摘　　要：以分析纯Bi2O3和Er2O3为原料,采用反向滴定共沉淀法合成Bi和Er的氢氧化物前驱体,并对共沉淀的pH值条件进行了分析。将该前驱体在500℃焙烧3h后得到Bi0.75Er0.25O1.5的纳米粉体,高温XRD结果表明该粉体主要为β相,谢乐公式计算平均晶粒尺寸为10nm,并且随温度升高在650℃转变为δ相。通过热力学计算,确定了SPS下烧结Bi0.75Er0.25O1.5陶瓷适宜的温度和氧分压条件,最后在测试温度为500℃保温1min得到了相对密度达到96%的δ相纳米晶的Bi0.75Er0.25O1.5陶瓷,平均晶粒尺寸为18nm。Using analytical pure Bi2O3 and Er2O3 as raw materials,the precursor of Bi and Er can be precipitated by reverse titration co-precipitation method,and the adequate pH value for co-precipitation was also analyzed.Bi0.75Er0.25O1.5 nano-powder was obtained after calcining this precursor at 500℃ for 3h.High temperature XRD results showed that this nanopowder was mainly in β form,with an average grain size of 10nm calculated by Scherrer Equation,which transformed into δ form completely at 650℃.According to the thermodynamic calculation,the suitable temperature and partial pressure of oxygen was chose.Finally,dense δ-Bi0.75Er0.25O1.5 solid electrolyte was sintered at 500℃（measured temperature）for 1min,with a relative density of 96% and an average grain size of 18nm.

关 键 词：反向滴定共沉淀 纳米晶Bi0.75Er0.25O1.5 SPS 相转变 优势区图 

分 类 号：TQ135.3[化学工程—无机化工]