摘要
研究了微波对陶瓷材料的作用，综合了Ｍａｘｗｅｌ电磁理论及介质理论，从理论上分析了微波与物质相互作用的机理。指出了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。即使在介质吸收为零的情况下，由于介质的反射，微波也不能百分之百穿过介质。利用微波加热物质，物质的损耗有一定的限制，对于２．４５ＧＨｚ的微波，物质电导率应在１０－４～１Ω－１ｃｍ－１之间。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 to substance was analyzed with classical Maxwell electromagnetic theory and dielectric theory. The results show that the microwave absorption of substance is caused by the conductive loss and dielectric relaxation loss of substance, and the conductive loss will be main loss at high temperature. Microwave can not completely pass unabsorbing microwave materials for the surface reflecting. Heating with 2.45GHz microwave the substance conductivity is 10 -4 ～1Ω -1 ·cm -1 . The behavior of nonhomogeneous solid under microwave irradiation was simply evaluated and predicted.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
1998年第12期76-78,82,共4页
Journal of Tsinghua University(Science and Technology)
基金
国家自然科学基金
关键词
微波加热
介质损耗
陶瓷
烧成
microwave heating
dielectric loss
ceramic materials
