氧化鉍基固態氧化物燃料電池電解質之製備與分析

Abstract

本研究利用膠粒分散及強迫析出之製程，製出鈮添加於氧化鉍、以及添加釔的鈮酸鉍材料，以達到良好的成分均勻以及相穩定的要求。首先研究三種起始粉之膠粒性質，找出最適合的製程條件；之後測試燒結樣品表面及縱切面之均勻度，得出的結果以統計學的方法進行分析。此外，以XRD來進行相鑑定，並與電子繞射的結果對照。導電度量測方面，燒結後之B15N-6Y樣品在500oC可達到10-2 S/cm水準。對於水溶液中膠粒分散機制會有深入討論。

In order to achieve compositional homogeneity and phase stability, colloidal processing and forced-precipitation method were utilized to prepare various Y2O3- and Nb2O5-doped Bi2O3 materials. Colloidal properties of three starting powders were investigated with respect to the homogeneity on the bulk sample surface and cross-sectional areas by a statistical approach. The crystalline phases were determined by XRD and electron diffraction. Besides, electric conductivity of the samples was measured. The results show acceptable conductivity of sintered B15N6Y, exceeds 10-2 S/cm, at 500oC. The dispersion mechanism of fine oxide powders will be discussed in this work.