Synthesis of Nanometer-Sized SnO<SUB>x</SUB> Particles by NAS-FAS Method and Their Electric Conductivity

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  • NAC-FAS法による酸化スズ超微粒子の合成とその電気伝導性
  • NAC FASホウ ニ ヨル サンカ スズ チョウ ビリュウシ ノ ゴウセイ ト ソノ デンキ デンドウセイ
  • Synthesis of Nanometer-Sized SnOx Particles by NAS-FAS Method and Their Electric Conductivity

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Abstract

SnOx (x =1, 2) particles with high electric conductivity were prepared from tin (II) acetate and antimony (III) chloride in alkaline ethanol-water solution under reflux. Crystal form and crystallite size of nanometer-sized SnOx particles strongly depended on sample preparation conditions such as ethanol to water ratio (Rs), tin acetate to sodium hydroxide ratio (Rc) in media, and Sb content. At Rs= 50/50, SnO2 single crystals of 3-5 nm in diameter were formed at Rc =10, whereas SnO particles of 20-30 nm in diameter were synthesized in addition to SnO2 fine particles at Rc = 15. No precipitate was obtained at Rc = 5 and 25. After heated above 800°C, the electric resistance of SnO2 particles doped with antimony ion (<102cm) became much less than that of non doped SnO2 particles (103-105Ωcm).

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