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本文用 TG—DTA,IR,Raman 和 XRD 等手段研究了共沉淀法合成烧绿石型复合氧化物 Y_2Su_2O_7的过程.实验结果表明,溶液中 Y~(3+)和 SnCl_6~(2-)离子可能同时沉淀,各自形成微晶,随后相互作用形成复合胶体微晶,形成共沉淀的初始产物 YSn_2.它的 X 射线衍射是非晶态的.对YSn_2进行热处理时,Y 和 Sn 的氧化物发生固体反应.最后生成烧绿石型复合氧化物 Y_2Sn_2O_7粉晶.
In this paper, the synthesis process of pyrochlore composite oxide Y 2 Su 2 O 7 by coprecipitation method was studied by means of TG-DTA, IR, Raman and XRD.The experimental results show that Y 3 O 3 and SnCl 6 2- ions May precipitate at the same time, form microcrystals each, and then interact to form composite colloid crystallites to form coprecipitated initial product YSn 2. Its X-ray diffraction is amorphous. When the YSn 2 is heat-treated, the oxides of Y and Sn solidify Reaction finally generated pyrochlore composite oxide Y_2Sn_2O_7 powder.