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

概要

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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 PbTeO_3, 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 PbTeO_3 was obtained by hydrolysis of the PbTe-bisamide and PbTe-alkoxide. Heat-treatment of the resulting amorphous PbTeO_3 powder at 250℃ and 400℃ in air resulted in the transformation to a cubic PbTeO_3 phase and to a tetragonal PbTeO_3 phase, respectively. PbTe was obtained by heat-treatment of calcined amorphous and crystallized PbTeO_3 at 400℃-500℃ in H_2. The Pb/Te ratios of the products were chemically stoichiometric.
社団法人日本セラミックス協会の論文
2005-04-01