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Dynamic Distribution of Wood Moisture Content during Microwave Drying and Hot Air Drying
Author(s): 
Pages: 98-102,113
Year: Issue:  6
Journal: Journal of Central South Forestry University

Keyword:  木材科学 黑胡桃 木材干燥 微波干燥 X射线扫描 含水率分布;
Abstract: 以黑胡桃木材为对象,采用X射线扫描含水率分布测试方法,分析、比较了微波干燥与常规热风干燥过程中木材内部含水率动态分布规律.结果表明:在微波干燥和常规热风干燥过程中,木材内层含水率均高于表层,存在着整体性的内高外低的含水率梯度场;在整个微波干燥过程中,木材内部虽然出现了部分内层含水率低于外层的情况,存在着含水率分布的局部不均匀,但并未出现与常规热风干燥相反的含水率梯度;在微波干燥中,木材内部各层与表层含水率的差值随着干燥时间的延长逐渐降低.随着干燥过程的进行,常规热风干燥中木材芯层与表层含水率差呈现出先增加后减小的变化趋势.
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