The synthesis of crystalline zirconium phosphate with large particle size by the direct-precipitation method.
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概要
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The direct-precipitation method was studied as a possible way to synthesize crystalline zirconium phosphate of a large and uniform crystal size. The yield and the crystal size were examined as functions of the initial hydrofluoric-acid and phosphoric-acid concentrations and the warming temperature. The conditions for preparing the largest crystal were: ZrOCl<SUB>2</SUB>·8H<SUB>2</SUB>O, 0.13 M; hydrofluoric acid concentration, 0.715 M; phosphoric acid concentration, 5 M; temperature, 50 °C. Those for preparing the material with uniform crystal-size distribution and a possibly large-mean crystal size were: ZrOCl<SUB>2</SUB>·8H<SUB>2</SUB>O, 0.13 M; hydrofluoric acid concentration, 0.715 M; phosphoric acid concentration, 9 M; temperature, 60 °C. The product was confirmed to be crystalline Zr(HPO<SUB>4</SUB>)<SUB>2</SUB>·H<SUB>2</SUB>O by means of chemical, thermal, and X-ray analyses, and by an examination of the titration curve.
- 公益社団法人 日本化学会の論文
著者
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Inoue Yasushi
Department of Applied Physics, Osaka University
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Yamada Yoshimune
Department of Nuclear Engineering, Faculty of Engineering, Tohoku University
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