Study of the Bimodal Pore Structure of Ceramic Powder Compacts by Mercury Porosimetry
Study of the Bimodal Pore Structure of Ceramic Powder Compacts by Mercury Porosimetry
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水银孔隙率法研究陶瓷粉末压块的双峰孔结构
DOI：
10.1111/j.1151-2916.1992.tb04460.x
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发表时间：
1992
期刊：
影响因子：
--
通讯作者：
J. S. Reed
中科院分区：
文献类型：
--
作者：
Jingmin Zheng;J. S. Reed
用压汞法研究了生坯和部分烧结氧化铝压坯的孔径分布。实验表明，对于孔径呈双峰分布的压坯，用压汞体积数据研究烧结过程中的孔结构变化可能会导致错误的结论，因为压汞体积与孔隙率不成线性关系。相反，应该使用孔隙度分布。当大孔的孔隙率为<；10%时，观察到压坯中的一些大孔变得孤立或通向压坯表面；这导致了用汞孔隙率测量的孔隙率分布的误差。
Mercury porosimetry was used to study the pore-size distribution of both green and partially sintered alumina compacts. Experiments showed that using the mercury-penetration volume data to study the pore structure changes during sintering for a compact with a bimodal pore-size distribution could lead to wrong conclusions because the mercury-penetration volume was not linearly proportional to the porosity. Instead, the porosity distribution should be used. When the porosity of large pores was <10%, some large pores within the compact were observed to become isolated or channeled to the compact surface; this caused errors in the porosity distribution measured by mercury porosity.