THERMAL-BEHAVIOR OF AMMONIUM POLYPHOSPHATE INORGANIC COMPOUND MIXTURES .1. TALC

被引：16

作者：

LEVCHIK, GF

SELEVICH, AF

LEVCHIK, SV

LESNIKOVICH, AI

机构：

[1] Research Institute for Physico-Chemical Problems, Byelorussian University, Minsk, 220050

来源：

THERMOCHIMICA ACTA | 1994年 / 239卷

关键词：

D O I：

10.1016/0040-6031(94)87054-3

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The chemical interaction between ammonium polyphosphate (APP) and talc was studied under dynamic or isothermal heating conditions. The products of interaction were identified by X-ray methods or separated by thin layer chromatography and analysed. It was shown that APP decomposes above 280-degrees-C and starts to interact with talc above 300-degrees-C, giving binary ammonium silicon tetrapolyphosphate and ammonium magnesium polyphosphate or cyclophosphate depending on the initial APP/talc ratio in the mixture. The formation of magnesium cyclotetraphosphate, magnesium ultraphosphate, silicon oxymonophosphate and silicon diphosphate is observed after further heating at 400-800-degrees-C. A glass of magnesium silicon phosphate is formed at 1000-degrees-C. The schemes of chemical reactions occurring at different temperatures are proposed for various APP/talc ratios.

引用

页码：41 / 49

页数：9

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