| Ba-K-Bi-O和Ba-K-Pb-O氧化物的碘量滴定 |
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| 引用本文： | 谢民,赵良仲. Ba-K-Bi-O和Ba-K-Pb-O氧化物的碘量滴定[J]. 分析化学, 1996, 0(11) |
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| 作者姓名： | 谢民 赵良仲 |
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| 作者单位： | 中国科学院化学研究所!北京，100080，中国科学院化学研究所!北京，100080 |
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| 摘 要： | 本文提出了碘量法滴定Ba－K－Bi-O和Ba－K－Pb－O氧化物中Ba和Pb的名义价态，然后据此计算这些氧化物中K和Ba含量的方法。该法适用于正常条件下合成的具有ABO3型钙钛矿结构的Ba－K－Bi-O和Ba－K－Pb－O晶体。用本法的滴定结果表明，Tc为31K的Ba－K－Bi-O超导体的K含量为0．4，当K含量减少时，Tc随之下降。
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| 关 键 词： | 钡－钾－铋－氧超导体 钡－钾－铅－氧氧化物 碘量滴定法 |
Iodometric Titration of Ba-K-Bi-O and Ba-K-Pb-O Oxides |
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| Xie Min'''', Zhao Liangzhong. Iodometric Titration of Ba-K-Bi-O and Ba-K-Pb-O Oxides[J]. Chinese Journal of Analytical Chemistry, 1996, 0(11) |
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| Authors: | Xie Min'''' Zhao Liangzhong |
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| Abstract: | A method of iodometric titration has been used to determine the nominal valenceof Bi and Pb in Ba-K-Bi-O and Ba-K-Pb-O oxides. The contents of Ba and K in these oxidescan also be calculated according to the nominal valences. This method is suitable for theanalysis of Ba-K-Bi-O and Ba-K-Pb-O crystals, which are prepared under normal syntheticconditions and have ABO, type perovskite structure. Results show that the K content is 0. 4for Ba-K-Bi-O superconductor with Tc = 31 K, and TC falls off as the K content is decreased. |
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| Keywords: | Barium-potassium-bismuth-oxygen superconductor barium-potassium-lead-oxygen oxide iodometric titration |
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