Thermal change of magnesium highpolyphosphate coacervates.
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概要
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The thermal change of magnesium highpolyphosphate coacervates with various sodium contents was studied by means of DTA, TGA and high temperature X-ray diffraction technique. Most of the highpolyphosphates in the coacervates were degraded into hydrated orthophosphates up to about 100 °C, the pyrophosphates and tetrametaphosphates being formed at 200–300 °C and 300–500 °C, respectively. The formation temperature of "X" (a mixture of Mg<SUB>2</SUB>P<SUB>2</SUB>O<SUB>7</SUB> and MgNa<SUB>2</SUB>P<SUB>4</SUB>O<SUB>12</SUB>) was lowered with an increase of sodium content in the coacervate samples. Mg(H<SUB>2</SUB>PO<SUB>4</SUB>)<SUB>2</SUB>·2H<SUB>2</SUB>O, Mg(H<SUB>2</SUB>PO<SUB>4</SUB>)<SUB>2</SUB>, MgH<SUB>2</SUB>P<SUB>2</SUB>O<SUB>7</SUB>, "X" and Mg<SUB>2</SUB>P<SUB>4</SUB>O<SUB>12</SUB> were determined in the crystalline substances obtained by the isothermal heat treatment of coacervates at various temperatures.
- 公益社団法人 日本化学会の論文
著者
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Umegaki Takao
Department Of Applied Chemistry Graduate School Of Engineering Tokyo Metropolitan University
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Nakayama Yukihiro
Department of Industrial Chemistry, Faculty of Technology, Tokyo Metropolitan University
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Kanazawa Takafumi
Department of Industrial Chemistry, Faculty of Technology, Tokyo Metropolitan University
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