CHEMICAL SYNTHESES BY MEANS OF MICROWAVE DIGESTION AS A FOCUSED OPEN-VESSEL SYSTEM - STRUCTURAL-PROPERTIES OF OXIDES AND HYDROXIDES AS POWDERS

被引：20

作者：

GASGNIER, M

ALBERT, L

DEROUET, J

BEAURY, L

LOUPY, A

PETIT, A

JACQUAULT, P

机构：

[1] UNIV PARIS 11,REACT SELECT SUPPORTS LAB,CNRS,UA 478,F-91405 ORSAY,FRANCE

[2] PROLABO,F-75011 PARIS,FRANCE

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 1993年 / 198卷 / 1-2期

关键词：

D O I：

10.1016/0925-8388(93)90148-G

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

By means of a focused microwave (monomode system) apparatus, it is possible to carry out some chemical syntheses in very short times. Various kinds of oxides and hydroxides have been irradiated by this method. Different transition phases and different reduction and oxidation reactions have been observed in the course of the heating treatments. The most important results are provided by black powder, which absorbs the microwave energy and quickly becomes incandescent red at low temperature. However, the absorptance is a function of the dielectric constant and dielectric loss values, which vary from one oxide to another. Compared with some previous results obtained using multimode closed-vessel domestic ovens, the focused system allows us to homogenize the heating inside the powder and to reach higher temperatures in the cases of a few absorbent materials (particularly white powders).

引用

页码：73 / 83

页数：11

共 28 条

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