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- NARIAI HIROYUKI
- Department of Chemical Science and Engineering, Faculty of Engineering, Kobe University
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- MOTOOKA ITARU
- Department of Chemical Science and Engineering, Faculty of Engineering, Kobe University
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- TSUHAKO MITSUTOMO
- Kobe Women's College of Pharmacy
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説明
The thermal behavior of various cobalt cyclo-phosphates, Co2P4O12·8H2O(P4m), Co3P6O18·14H2O(P6m), and Co4P8O24·18H2O (P8m), was investigated using TG-DTA, HPLC, X-ray diffraction analysis, and IR. P4m decomposed perfectly to short-chain phosphates and oligo phosphates (Poligo:chain length n=5-14) with the elimination of water of crystallization. With an increase in temperature, their phosphates condensed to insoluble highpolyphosphates (Phigh poly). The decomposition of P4m proceeded faster under humid air than dry air. P6m, also decomposed to short-chain phosphates and Poligo (n=7-14). Although the water vapor accelerated the decomposition of P6m, it prevented the condensation of phosphates. At temperatures above 540°C, all the phosphates changed to Phigh poly. P8m lost the most of water of crystallization to decompose to short-chain phosphates and oligophosphates at about 150°C. An increase of oligo phosphates (n=9-17) and soluble polyphosphates (n=18-20) was observed at 400 °C. Under a higher water vapor pressure, the decomposition of P8m proceeded rather faster than in a lower one, while the rate of condensation reactions slower than in the higher one. At 400°C, a little amount of P6m formed. At higher temperatures, all the phosphates changed to Phigh poly.
収録刊行物
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- Phosphorus Research Bulletin
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Phosphorus Research Bulletin 2 (0), 45-50, 1992
Japanese Association of Inorganic Phosphorus Chemistry
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詳細情報 詳細情報について
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- CRID
- 1390282680440019456
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- NII論文ID
- 130004992530
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- ISSN
- 09184783
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- Crossref
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- OpenAIRE
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- 使用不可