微波与无机非金属介质的相互作用

无机材料学报, 1998, 13(3): 282-290.

微波与无机非金属介质的相互作用

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北京onclick="TPI_openwindow('/GRID20/knowledgenet.aspx?sdb=CJFD&

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State Key Laboratory of New Ceromics and Fine Processing

Department of Materials Science andEngineering

Tsinghua University Beijing 100084 China

关键词：微波加热 , null , null

Microwave Interaction with Inorganic Nonmetallic Substance

HUANG Xiang-Dong , LI Jian-Bao , XIE Zhi-Peng , HUANG Yong

Keywords： microwave heating, dielectric loss, inorganic nonmetallic substance , 介质损耗 , 无机非金属材料

本文从麦克斯韦电磁理论出发，理论上分析了微波与物质相互作用机理，指出介质吸收微波源于介质对微波的电导损耗和极化损耗，高温下，电导损耗将占主要地位．利用微波加热物质，物质的损耗有一定的限制，对干2．45GHz的微波，物质电导率应在1Ω^-1cm^－1以下，根据现有的无机非金属材料的电导率数据，对某些无机非金属材料的微波加热特性进行了简单的评估；在一些简单的假设下，对微波加热样品时，样品内部温度分布情况作了简要描述，对微波场中非均匀固体的行为进行了简单的分析和预测．

The mechanism of microwave interaction with substance was analyzed by means of Maxwell electromagnetic theory. The results showed that the microwave absorption
of substance was caused by the conductive loss and dielectric relaxation loss of substance, at high temperatures the conductive loss will be main loss. Heating
with 2.45GHz microwave, the substance conductivity must be lower than 1Ω^-1cm^-1. With the conductive data. The microwave heating charaeteristic of some inorganic
nonmetallic materials were evaluated. The temperature distribution within a sample was described with some hypothesis when microwave heating. The behavior of
nonhomogeneous solid under microwave irradiation was simply evaluated and predicted.

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