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在分析Ｂａ~（２＋）、ＴｉＯ~（２＋）与草酸混合体系热力学平衡的基础上，提出了将ＴｉＯ~（２＋）与草酸混合，在一定的ｐＨ值时生成钛配阴离子，再与ＢａＣｌ_２进行复分解反应，直接沉淀出ＢａＴｉＯ_３的前驱体－草酸氧钛钡，最终经煅烧得ＢａＴｉＯ_３粉体的合成新工艺。用化学分析法及Ｘ荧光法对ＢａＴｉＯ_３的Ｂａ／ｒｉ比及有害杂质进行了分析；用ＸＲＤ、ＴＥＭ对ＢａＴｉＯ_３的晶型、粒径及形貌进行了表征。结果显示：用该工艺所合成的ＢａＴｉＯ_３粉体纯度高、粒径小，经正电阻温度系数元件（简称ＰＴＣ）及多层陶瓷电容器应用试验均显示出优良的性能。
Based on the analysis of the thermodynamic equilibrium of Ba ~ (2 +) and TiO ~ (2+) mixed with oxalic acid, it is proposed to mix TiO ~ (2+) with oxalic acid to produce titanium anions at a certain pH and then react with BaCl_2 Metathesis reaction, directly precipitated BaTiO_3 precursor - titanyl oxalate, the final calcined BaTiO_3 powder synthesis of new technology. Ba / ri ratio and harmful impurities of BaTiO_3 were analyzed by chemical analysis and X-ray fluorescence. The crystal structure, particle size and morphology of BaTiO_3 were characterized by XRD and TEM. The results show that the BaTiO_3 powder synthesized by this process has high purity and small particle size. The positive temperature coefficient (PTC) and multi-layer ceramic capacitors show excellent performance.