Porosity in Spinel Compacts Using Small‐Angle Neutron Scattering
作者:
KATHARINE G. FRASE,
KAY HARDMAN‐RHYNE,
期刊:
Journal of the American Ceramic Society
(WILEY Available online 1988)
卷期:
Volume 71,
issue 1
页码: 1-6
ISSN:0002-7820
年代: 1988
DOI:10.1111/j.1151-2916.1988.tb05752.x
出版商: Blackwell Publishing Ltd
数据来源: WILEY
摘要:
Unfired spinel (MgAl2O4) compacts and sintered materials with small hard agglomerates (<5 μm) were studied using small‐angle neutron scattering (SANS) techniques. The SANS results were compared with those from mercury porosimetry and gas adsorption. The results from green‐state samples are consistent with interconnected “ink‐bottle”‐type porosity. In the latter stages of densification the average void size is significantly larger than that found in the unfired compact. The presence of the hard agglomerates affects the observed SANS scattering much more in the partially densified samples than in the unfired compacts. It was demonstrated that the use of multiple SANS techniques to study large voids (<0.1 μm) and large pore fractions (45%) is a useful, sensitive, nondestructive diagnostic probe for the evaluation of porosity dur
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