Effect of Antimony Oxide on the Deposition and Dispersion of Metallic Copper Nanoparticles in Phosphate Glasses

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  • Murata Takahiro
    Department of Applied Science for Electronics and Materials, Kyushu University
  • Sato Masanori
    Department of Applied Science for Electronics and Materials, Kyushu University
  • Fukano Yosifumi
    Department of Materials Science and Technology, Kyushu University
  • Morinaga Kenji
    Department of Applied Science for Electronics and Materials, Kyushu University

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Other Title
  • リン酸塩系ガラスにおける銅微粒子の析出と分散に及ぼす酸化アンチモンの添加効果
  • リンサンエンケイ ガラス ニ オケル ドウ ビリュウシ ノ セキシュツ ト ブンサン ニ オヨボス サンカ アンチモン ノ テンカ コウカ

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Metallic copper nanoparticles in phosphate glasses were prepared by melt-quenching and heat treatment method. Morphology of deposition and dispersion of metallic copper nanoparticles in phosphate glass were investigated by UV-Vis absorption and transmission electron microscopy (TEM) measurements. The time-temperature-deposition (TTD) diagram for the glass dispersed with metallic copper nanoparticles was proposed on the basis of the UV-Vis absorption measurement. The TTD diagram shows that the region in which metallic copper nanoparticles are deposited and mono-dispersed is narrow near the crystallization temperature in 50BaO·50P2O5+6Cu2O+6SnO (mol%) glasses. The TEM photograph of heat-treated 50BaO·50P2O5+6Cu2O+6SnO glass indicates that the amount of deposited metallic copper nanoparticles is small and the average diameter of the particles is approximately 20 nm. We obtained a large amount of uniform matallic copper particles dispersed in 50BaO·50P2O5+6Cu2O+6SnO+2Sb2O3 (mol%) glass samples heated below the glass transition temperature. In order to control the deposition and dispersion of metallic copper nanoparticles in the glass, we discussed the deposition and growth mechanisms of metallic copper nanoparticles in 50BaO·50P2O5+6Cu2O+6SnO and 50BaO·50P2O5+6Cu2O+6SnO+2Sb2O3 glasses in terms of the redox reactions between Cu+ ions and reducing oxides, i.e. SnO and Sb2O3.

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