研究了草酸加入对TiO_2-1wt%V_2O_5复合粉体相变的影响,利用TG-DTA和XRD对凝胶的相变过程进行了研究,分析了产物的晶体结构、晶粒尺寸和金红石的相对含量。结果表明,少量的草酸可以促进锐钛矿相向金红石相的转变,草酸加入量对金红石相的生成影响为:促进→抑制,当加入0.1moL/L的草酸1mL时,金红石晶粒尺寸最小为65.41nm。 The effect of oxalic acid addition on the phase transition of TiO_2-1wt% V_2O_5 composite powders was studied. The phase transition of the gel was studied by TG-DTA and XRD. The crystal structure, grain size and relative content of rutile . The results showed that a small amount of oxalic acid could promote the transformation from anatase phase to rutile phase. The effect of oxalic acid addition on the formation of rutile phase was promoted → inhibited. When 0.1 mL / L oxalic acid was added into 1 mL, the minimum rutile crystal size was 65.41 nm.