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首页> 外文期刊>日本セラミックス協会学術論文誌 >Low-Temperature Synthesis of Gd-Doped Ceria Powder by Polymeirzed Precursor Solutions
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Low-Temperature Synthesis of Gd-Doped Ceria Powder by Polymeirzed Precursor Solutions

机译：聚合前驱体溶液低温合成Synthesis掺杂的二氧化铈粉

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摘要

Synthesis of the Ce_(0.9)Gd_(0.1)O_(1.95) (CGO) powder by polymeric precursor solution with mixing of nitrates, nitric acid and ethylene glycol was investigated with emphasis on the effect of polymerization of the precursor solution on the crystallization and morphology of the derived solid intermediate and the final oxide powder. It is first evidenced that the solid intermediate derived from the polymerized solution exists in the form of well-crystallized cerium-gadolinium formate solid solution, Ce_(1-x)Gd_x(HCOO)_3, exhibiting the polycrystalline and anisotropic growth morphology. Moreover, the intensive polymerization of the precursor solution results in the direct formation of the loosely agglomerated nano-scaled CGO oxide powder at the temperature as low as 130 deg C. The effects of nitric acid and nitrates on the polymerization of the precursor solution are identified experimentally, based on which, a polymerization mechanism of the ethylene glycol process is proposed.
机译：研究了聚合前体溶液与硝酸盐，硝酸和乙二醇的混合，合成了Ce_（0.9）Gd_（0.1）O_（1.95）（CGO）粉末，着重研究了前体溶液的聚合对结晶和结晶的影响。衍生的固体中间体和最终氧化物粉末的形态。首先证明，聚合溶液衍生的固体中间体以良好结晶的甲酸铈-甲酸固溶体Ce_（1-x）Gd_x（HCOO）_3的形式存在，表现出多晶和各向异性的生长形态。此外，前体溶液的强烈聚合导致在低至130℃的温度下直接形成松散团聚的纳米级CGO氧化物粉末。确定了硝酸和硝酸盐对前体溶液聚合的影响通过实验，提出了乙二醇工艺的聚合机理。

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