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采用溶胶 -凝胶法成功制备出纳米尺寸的 Ti O2 /Al2 O3复合体 ,并用 XRD、XPS和 IR等手段研究了复合体的结构组成及 Ti O2 和 Al2 O3的分布状态 ,进一步探讨了机械研磨法制备 Ti O2 /Al2 O3复合体等因素对其组成的影响。 XRD分析表明 ,在 [Al+ 3 ]∶ [Ti+ 3 ]=1∶ 1 (或 0 .5)情况下 ,改进的溶胶 -凝胶法制备纳米 Ti O2 /Al2 O3复合体 ,其 Ti O2 主要分布在 Al2 O3的表面层 ,在含 Ti O2 很少的 Ti O2 /Al2 O3复合体的 IR谱中在 4 0 0～60 0 cm- 1区间能出现 Ti O2 特征吸收峰 ,并随着样品中含 Ti O2 量增加 ,Ti O2 特征吸收峰从 592 .8cm- 1～540 .3cm- 1 逐渐变化 ,也说明该法制备的 Ti O2 /Al2 O3复合体中 Ti O2 主要分布在 Al2 O3表面层。机械研磨法制备的 Ti O2 /Al2 O3复合体的组成则不同 ,在 1 2 0 0℃烧结的 Al2 O3衍射峰明显升高 ,在 1 2 50℃烧结有 Al2 Ti O5生成 ,这说明制备方法和制备条件对复合体的组成有很大影响
The nano-size Ti O2 / Al 2 O 3 composite was successfully prepared by sol-gel method. The structure and the distribution of Ti 2 O and Al 2 O 3 were studied by means of XRD, XPS and IR. The mechanical grinding Influence of Factors on the Composition of Ti O2 / Al 2 O 3 Composite Prepared by the Method of. XRD analysis showed that the Ti0 2 / Al 2 O 3 composite was prepared by the improved sol-gel method under the condition of [Al + 3]: [Ti + 3] = 1: 1 The surface layer of Al 2 O 3 shows the characteristic absorption peak of Ti O 2 in the IR spectrum of the Ti O 2 / Al 2 O 3 complex containing little TiO 2 in the range of 400 ~ 60 0 cm-1. With the increase of Ti The amount of O2 increased and the characteristic absorption peak of Ti O2 gradually changed from 592.8cm-1 to 540.3cm-1, indicating that the Ti O2 in the Ti O2 / Al 2 O 3 composite prepared by the method was mainly distributed in the surface layer of Al 2 O 3. The composition of Ti O2 / Al 2 O 3 composite prepared by mechanical milling is different. The diffraction peak of Al 2 O 3 sintered at 1200 ℃ increases obviously, and Al 2 Ti O 5 is sintered at 1250 ℃, which shows that the preparation method and The preparation conditions have a great influence on the composition of the complex