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INTRODUCTION In powder compaction, the characteristics ofthe powder affect the compaction behavior and thequality of the pressed green body and its relativedensity, porosity, pore size distribution, sinteringand the consequent microstructure of the final sin-tered body. Superfine powder is prerequisite forpreparing high performance ceramic materials (Liu,1996; Lange et al., 1983; Lange, 1989). At present,most of the chemosynthesis methods are not suit-able for preparing industrial … 相似文献
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Silicon carbide ceramics were prepared with SiC powder treated by the fluidized bed opposed jet mill as rawmaterials, and the effects of the ultra-fine treatment mechanism on the compaction and sintering behavior of SiC ceramicswere investigated. The results showed that the compacts had higher density and microstructure homogeneity when thesintering temperature of the compact was decreased; and that the surface microstructure, densification and mechanicalproperties of the sintered body could be ameliorated obviously. 相似文献
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郭兴忠 《雁北师范学院学报》2002,18(5):61-62
分部积分法是一种很重要的积分方法.有些积分必须反复使用分部积分公式才能求出结果,计算冗长繁杂.列表法就可以解决这一问题. 相似文献
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郭兴忠 《大同职业技术学院学报》2003,(3)
有些不等式运用常规的代数方法证明感到非常棘手,但是通过直观的几何图形来分析,可获 得简捷方法,我们可以把这种方法充分运用到教学中. 相似文献
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