添加稀土Gd的氧化锆的物相分析

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刘树信
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1 王海滨 已出版文章查询
王海滨
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1绵阳师范学院化学与化学工程学院 四川绵阳621010


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以硝酸锆、硝酸钆和柠檬酸为原料,按n(Gd):n(Zr)分别为1:99、3:97、5:95、8:92和10:90的配比在1 200℃煅烧6h制备了稀土Gd掺杂ZrO2试样,以研究Gd与ZrO2的化学相容性进而按n(Gd2Zr2O7):n(ZrO2)分别为1:10、1:8、1:4、1:2、1:1、4:1和8:1的配比于1 200℃煅烧6h原位合成了Gd2 Zr2O7-ZrO2复合材料.采用XRD和拉曼光谱研究了稀土Gd掺杂ZrO2和Gd2 Zr2O7-ZrO2复合材料的物相组成和结构.结果表明:稀土Gd容易进入ZrO2晶格形成固溶体,当稀土Gd掺杂量较少时,随着稀土Gd掺杂量的增加,m-ZrO2逐渐转变为t-ZrO2当稀土Gd添加量较多时,随着Gd量的增加,逐渐原位生成了萤石结构的稀土锆酸盐Gd2Zr2O7,从而合成了由Gd2 Zr2O7和t-ZrO2构成的Gd2 Zr2 O7 - ZrO2复合材料.

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