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中文摘要：
用SiO2和La2O3作为原料,KC1为熔盐,合成中温固体氧化物燃料电池电解质La9.33Si6O26粉体.通过X线衍射仪（XRD）和场发射扫描电子显微镜（FESEM）等分析方法对合成粉体进行物相测定和形貌观察,在不同温度下考察粉体的烧结性能,利用交流阻抗对电解质的电性能进行测试.结果表明：通过工艺参数的设计,利用熔盐法在900℃成功合成了平均粒径为120 nm的单相La9.33 Si6 026超细粉体,1 450℃烧结4h后,La9.33 Si6 O26电解质的相对致密度达到92.7％,此烧结温度比传统固相法降低了250℃,烧结体在750℃的电导率为4.14×10-4S/cm,电导活化能为0.83 eV.
英文摘要：
Single-phase and uhrafine Lag. 33 Si6026 powders were synthesized by molten salt method using silicon dioxide and lanthanum oxide as reactants, potassium chloride as flux. X-ray diffraction （XRD） and field emission scanning electron microscopy （FESEM） were employed for the phase identification and morphological observations of the obtained powders. The sintering performance of the powders was studied and the ionic conductivity of the sintered sample was measured by AC impedance method. Results showed that single-phase La9.33 Si6026 powders with average particle size of 120 nm could be successfully synthe- sized at 900 ℃. These uhrafine powders possessed high sintering activities and their pressed pellets fired in 4 h had an apparent density equal to 92.7% of the theoretical values at 1 450 %, indicating at least 250 ~C lower than that for the powders obtained by solid state reactions. The La9.33Si6026 electrolyte was found to have an oxide ion conductivity of 4. 14 × 10-4 S/cm at 750 ℃with an activation energy of 0. 83 eV.
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