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The thermal decomposition of huntite and hydromagnesite—A review
Hollingbery, L.A. ; Hull, T.R.
Thermochimica acta, 2010-09, Vol.509 (1), p.1-11
[Periódico revisado por pares]
Oxford: Elsevier B.V
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Título:
The thermal decomposition of huntite and hydromagnesite—A review
Autor:
Hollingbery, L.A.
;
Hull, T.R.
Assuntos:
Aluminium hydroxide
;
Applied sciences
;
Carbon dioxide
;
Chemistry
;
Compounding ingredients
;
Crystal structure
;
Decomposition
;
Exact sciences and technology
;
Fire
;
Fireproof agents
;
Flame
;
Huntite
;
Hydromagnesite
;
Inorganic chemistry and origins of life
;
Magnesium carbonate
;
Magnesium oxide
;
Mineral
;
Minerals
;
Miscellaneous
;
Polymer industry, paints, wood
;
Preparations and properties
;
Retardant
;
Technology of polymers
;
Thermal decomposition
É parte de:
Thermochimica acta, 2010-09, Vol.509 (1), p.1-11
Notas:
ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
Descrição:
Naturally occurring mixtures of hydromagnesite and huntite are important industrial minerals. Their endothermic decomposition over a specific temperature range, releasing water and carbon dioxide, has lead to such mixtures being successfully used as fire retardants, often replacing aluminium hydroxide or magnesium hydroxide. The current understanding of the structure and thermal decomposition mechanism of both minerals and their combination in natural mixtures is reviewed. The crystalline structure of both minerals has been fully characterised. The thermal decomposition of huntite has been characterised and is relatively simple. However, the thermal decomposition mechanism of hydromagnesite is sensitive to many factors including rate of heating and the composition of the atmosphere. The partial pressure of carbon dioxide significantly affects the decomposition mechanism of hydromagnesite causing magnesium carbonate to crystallise and decompose at a higher temperature instead of decomposing directly to magnesium oxide.
Editor:
Oxford: Elsevier B.V
Idioma:
Inglês;Holandês
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