Synthesis of PbTe by Reduction of Corresponding Oxide with Metal Bis(trimethylsilyl)amide as Starting Chemicals

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  • SATOH Coji
    Department of Applied Chemistry, Faculty of Engineering, Seikei University
  • WATANABE Tomokazu
    Department of Applied Chemistry, Faculty of Engineering, Seikei University
  • KAWASAKI Kenji
    Department of Applied Chemistry, Faculty of Engineering, Seikei University
  • OZAKI Yoshiharu
    Department of Applied Chemistry, Faculty of Engineering, Seikei University

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  • 金属ビスアミドを原料ケミカルとする酸化物還元法によるＰｂＴｅの合成
  • キンゾク ビスアミド オ ゲンリョウ ケミカル ト スル サンカブツ カンゲンホウ ニ ヨル PbTe ノ ゴウセイ

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A new synthetic route based on solution chemistry was developed for a compound semiconductor lead telluride (PbTe). Lead telluride was synthesized by reduction of PbTeO3, which was prepared by hydrolysis of the corresponding metal organic solution as starting material. Two kinds of metal organic solution, metal bis(trimethylsilyl)amide and metal alkoxide were used as starting chemicals. PbTe-bisamide solution was prepared by the reaction of lead chloride with Li-bisamide in the presence of Te-bisamide. PbTe-alkoxide solution was prepared by the alcoholysis reaction of PbTe-bisamide with BuOH. Amorphous PbTeO3 was obtained by hydrolysis of the PbTe-bisamide and PbTe-alkoxide. Heat-treatment of the resulting amorphous PbTeO3 powder at 250°C and 400°C in air resulted in the transformation to a cubic PbTeO3 phase and to a tetragonal PbTeO3 phase, respectively. PbTe was obtained by heat-treatment of calcined amorphous and crystallized PbTeO3 at 400°C-500°C in H2. The Pb/Te ratios of the products were chemically stoichiometric.<br>

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