Systematic study of microwave absorption, heating, and microstructure evolution of porous copper powder metal compacts

被引：98

作者：

Ma, J. ^{[1
]}

Diehl, J. F. ^{[1
]}

Johnson, E. J. ^{[1
]}

Martin, K. R. ^{[1
]}

Miskovsky, N. M. ^{[1
]}

Smith, C. T. ^{[1
]}

Weisel, G. J. ^{[1
]}

Weiss, B. L. ^{[1
]}

Zimmerman, D. T. ^{[1
]}

机构：

[1] Penn State Univ, Altoona Coll, Altoona, PA 16601 USA

来源：

JOURNAL OF APPLIED PHYSICS | 2007年 / 101卷 / 07期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1063/1.2713087

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We present a systematic study of the absorption, heating behavior, and microstructure evolution of porous copper powder metal compacts subjected to 2.45 GHz microwave radiation and explain our observations using known physical mechanisms. Using a single-mode microwave system, we place the compacts in pure electric (E) or magnetic (H) fields and compare the heating trends. We also investigate the effect of particle size on the same. The observed trends and the differences between E- and H-field heating are reflected in the dramatic changes in the conductivity, permittivity, and permeability of the samples. These property changes are effected by the microstructure evolution during heating in the two types of fields. We also find that the observed dependence of the initial microwave heating on particle size is suggestive of single-particle behavior. (c) 2007 American Institute of Physics.

引用

页数：8

共 27 条

[1] High-temperature microwave processing of materials [J].