書誌事項
- タイトル別名
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- Formation Mechanism of Ultrafine Tungsten Oxide Particle during Thermal Decomposition of Ammonium Paratungstate.
- パラ タングステンサン アンモニウム ノ ネツ ブンカイ ニ オケル チョウ
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説明
The determing factor of tungsten oxide particle size during thermal decomposition of monoclinic ammonium paratungstate (APT) has been studied. APT was decomposed by thermobalance in nitrogen, oxygen, air and mixture of ammonia and nitrogen atmosphere. Formation mechanism of ultrafine tungsten oxide particle was investigated using X-ray diffraction analysis, scanning electron microscopy and specific surface area measurement. The relationship of particle size between hexagonal ammonium tungsten bronze (ATB) and tungsten oxide was discussed. Formation of ATB was controlled by parameters such as heating rate, sample mass and kind of atomosphere. Particle size of tungsten oxide was affected with amount of ATB formed in the intermediate, that is, particle size was very fine when ATB was formed in large quantities. Ultarfine individual particle of tungsten oxide was formed by a decomposing reaction from ATB to W03 or WO2.9, and grain growth of its particle took place at temperatures above 873 K.
収録刊行物
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- 粉体および粉末冶金
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粉体および粉末冶金 40 (8), 784-788, 1993
一般社団法人 粉体粉末冶金協会
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詳細情報 詳細情報について
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- CRID
- 1390282681285918848
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- NII論文ID
- 130000819332
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- NII書誌ID
- AN00222724
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- COI
- 1:CAS:528:DyaK2cXhtFWrug%3D%3D
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- ISSN
- 18809014
- 05328799
- http://id.crossref.org/issn/05328799
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- NDL書誌ID
- 3840795
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDLサーチ
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可