Systematic study of microwave absorption, heating, and microstructure evolution of porous copper powder metal compacts
Systematic study of microwave absorption, heating, and microstructure evolution of porous copper powder metal compacts
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DOI：
10.1063/1.2713087
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发表时间：
2007-04-01
影响因子：
3.2
通讯作者：
Zimmerman, D. T.
中科院分区：
文献类型：
--
作者：
Ma, J.;Diehl, J. F.;Zimmerman, D. T.
我们系统地研究了多孔铜粉末金属压坯在2.45 GHz微波辐射下的吸收、加热行为和微结构演变，并用已知的物理机制解释了我们的观察结果。使用单模微波系统，将压坯放置在纯电场(E)和磁场(H)中，并比较其加热趋势。我们还考察了颗粒大小对此的影响。样品的电导率、介电常数和磁导率的急剧变化反映了所观察到的趋势和电场加热和磁场加热之间的差异。这些性能变化受两种场加热过程中显微组织演变的影响。我们还发现，观察到的初始微波加热对粒子尺寸的依赖关系暗示了单粒子行为。(C)2007年美国物理研究所。
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.