CAJ | 학술논문

采用pechini方法合成了Sc、Bi共掺的氧化锆粉体,并且在1050～1500 ℃下进行烧结.通过XRD、拉曼光谱和交流阻抗等测试研究了物相组成和电导率.研究发现,Bi_2O_3的加入在降温过程,部分抑制了t'→t的相变,而且作为助烧剂提高了样品密度.当烧结温度为1400 ℃时,样品电导率最高 (大约10~(-2) S/cm, 500 ℃),这可能是由于在此温度下m相的消失和亚稳相t'的抑制分解所致.
채용pechini방법합성료Sc、Bi공참적양화고분체,병차재1050～1500 ℃하진행소결.통과XRD、랍만광보화교류조항등측시연구료물상조성화전도솔.연구발현,Bi_2O_3적가입재강온과정,부분억제료t'→t적상변,이차작위조소제제고료양품밀도.당소결온도위1400 ℃시,양품전도솔최고 (대약10~(-2) S/cm, 500 ℃),저가능시유우재차온도하m상적소실화아은상t'적억제분해소치.
Sc-stabilized zirconia doped with 2 mol% Bi_2O_3 (Bi-8ScSZ) was synthesized by Pechini method, and sintered at 1050～1500 ℃. The phases and electrical conductivity were investigated using XRD, visible Raman spectroscopy, and AC impedance spectroscopy. The addition of Bi_2O_3 partly suppressed the phase transitions (t'→t) in cooling process from elevated sintering temperatures, and improved the densities of the samples as a sintering aid. When the sintering temperature was 1400℃, the Bi-8ScSZ exhibited a high total electrical conductivity (about 10~(-2) S/cm, at 500 ℃), which may be due to the elimination of m-phase and the suppression of the decomposition of a meta-stable phase t'