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本文用热分析法结合 X-射线衍射分析对共沉掺锑四水合草酸钛氧钡[BaTiO(C_2O_4)_2·4H_2O]的热分解过程进行了研究。我们发现在共沉淀中锑以Sb_4O_5Cl_2相单独存在。为了对共沉掺锑四水合草酸钛氧钡热分解机理进行探讨,我们对 Sb_4O_5Cl_2、BaTiO(C_2O_4)_2·4H_2O 和共沉掺锑四水合草酸钛氧钡进行了热重(TG)与差热(DTA)的分析。根据实验数据,提出了 Sb_4O_5Cl_2热分解过程的机理,对BaTiO(C_2O_4)_2·4H_2O 发现失水是分步进行的,在90℃左右失去一分子水,然后失去三分子水。锑在800℃掺入 BaTiO_3晶格。最后提出了共沉掺锑四水合草酸钛氧钡的热分解机理。
In this paper, the thermal decomposition of BaTiO (C_2O_4) _2 · 4H_2O was investigated by thermal analysis and X-ray diffraction analysis. We found that antimony Sb_4O_5Cl_2 phase exists alone in coprecipitation. In order to investigate the thermal decomposition mechanism of coprecipitated antimony tetrahydrate titanyl oxalate, TG and DTA of Sb_4O_5Cl_2, BaTiO (C_2O_4) _2 · 4H_2O and coprecipitated antimony antimony tetrahydrate titanyl oxalate were investigated. (DTA) analysis. According to the experimental data, the mechanism of thermal decomposition of Sb_4O_5Cl_2 was proposed. It was found that the dehydration of BaTiO (C_2O_4) _2 · 4H_2O was carried out in a stepwise manner, losing one molecule of water at about 90 ℃ and then losing three molecules of water. Sb doped BaTiO_3 lattice at 800 ℃. Finally, the thermal decomposition mechanism of coprecipitation antimony titanate titanyl oxalate is proposed.