薄水铝石固相反应法制备Na-β"-Al_2O_3固体电解质  

Synthesis of Na-β"-Al_2O_3 powders by solid-state reaction from boehmite

作　　者：魏晓玲[1] 颉莹莹[1] 帅莉芳[1] 王瑾[1] 杨晖[1] 沈晓冬[1] 

机构地区：[1]南京工业大学材料科学与工程学院,江苏南京210009

出　　处：《电源技术》2011年第1期59-62,共4页Chinese Journal of Power Sources

基　　金：江苏省自然科学基金项目(BK200718)

摘　　要：以薄水铝石为原料制备Al2O3前驱粉体,随后添加Na2CO3和稳定剂MgO,并通过固相反应法来制备Na-β"-Al2O3电解质。研究中通过改变前驱粉体制备时的预烧温度和保温时间,以及高温烧结制度优化烧结工艺。用X射线衍射(XRD)和综合热分析仪(TG-DSC)等手段对粉末的结构和热性能进行了表征;样品的电导率测试用交流阻抗进行测试。结果表明,预烧温度和保温时间对产物的纯度有显著影响。1150℃保温2h所得到的前驱粉料,经高温烧结后所得到的产物中β"-Al2O3相含量最高,达到96.1%,300℃时样品电导率为0.013S/cm。The synthesis of Na-β＂-Al2O3 solid electrolyte powders with high purity was carried out by sintering the mixture of Na2CO3/MgO and precursors which was obtained from calcining boehmite.The synthesis process was optimized by varying the boemite calcine temperature,calcine time and the high-temperature sintering process.The crystal structure and thermoanalysis of the samples were characterized by XRD and TG-DSC.The results demonstrate that the purity of the targets is significantly affected by the calcine temperature and the calcine time.The products sintered from the precursor powders calcined at 1 150 ℃ for 2 h exhibits the highest purity of β＂-Al2O3 phase（96%）.The ionic conductivity of this sample is determined to 0.013 S/cm at 300 ℃ by the AC impedance measurement.

关 键 词：固相反应 Na-β"-Al2O3 固体电解质 钠-氯化镍电池 

分 类 号：TM912[电气工程—电力电子与电力传动]