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首页> 外文会议>Symposium on Nanophase and Nanocomposite Materials III held November 29-December 2, 1999, Boston, Massachusetts, U.S.A. >Synthesis of cubic and rhombohedral phased nanocrystalline SnO_2 doped In_2O_3 ITO powders with coprecipitation method
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Synthesis of cubic and rhombohedral phased nanocrystalline SnO_2 doped In_2O_3 ITO powders with coprecipitation method

机译：共沉淀法合成立方相和菱面相的纳米SnO_2掺杂的In_2O_3 ITO粉末

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摘要

Nanocrystalline ITO powders have been prepared by a hydroxide coprecipitation method. Through the variation of aging time after precipitation, we have characterized the size, morphology and the structure of the precipitates. It was found that the precipitates are in the state of InOOH at first. Further aging up to 48 h changed it to In(OH)_3 structure. After calcinations of the precipitates, rhombohedral nanocrystalline ITO powder with spherical shape was produced from InOOH structured precipitates, while cubic nanocrystalline ITO powder was produced from In(OH)_3. Fraction of the rhombohedral ITO powder decreased as the aging time increased. The particle size of the cubic ITO increased with aging time but that of rhombohedral ITO (approx15 nm) was almost invariant.
机译：纳米晶体ITO粉末已经通过氢氧化物共沉淀法制备。通过沉淀后老化时间的变化，我们表征了沉淀物的大小，形态和结构。首先发现沉淀物处于InOOH状态。进一步老化至48 h使其变成In（OH）_3结构。在沉淀物煅烧之后，由InOOH结构的沉淀物产生球形的菱形纳米晶ITO粉末，而由In（OH）_3产生立方纳米晶状ITO粉末。随老化时间的增加，菱面体ITO粉末的分数降低。立方ITO的粒径随老化时间的增加而增大，而菱面体ITO的粒径（约15 nm）几乎不变。

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