Evolution of the pore size distribution in final stage sintering of alumina measured by small-angle x-ray scattering.

Journal Article · Tue Jan 01 04:00:00 EST 1991 · J. Am. Ceram. Soc.

DOI:https://doi.org/10.1111/j.1151-2916.1991.tb06796.x· OSTI ID:937600

Krueger, S; Long, G G; Black, D R; Minor, D; Jemian, P R; Nieman, G W; Page, R A; NIST,

Small-angle X-ray scattering was used to follow the evolution of the pore size distribution during final-stage sintering of alumina and of alumina doped with 0.25 wt% magnesia. The volume-weighted (Guinier) results indicate that the effective size of the largest pores increases as the body goes from 97% to more than 99% dense. The surface-area-weighted (Porod) results show that the median size of the smallest pores decreases slightly over the same density range. Taken together, these data indicate that the pore size distribution becomes broader as final-stage densification proceeds. This was confirmed by a maximum entropy analysis, which was used to derive pore size distributions directly from the data. Finally, the evolution of the pore size distributions in alumina, with and without sintering aid, were compared.

• Research Organization: Argonne National Laboratory (ANL)
• Sponsoring Organization: ER
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 937600
• Report Number(s): ANL/MSD/JA-657
• Journal Information: J. Am. Ceram. Soc., Journal Name: J. Am. Ceram. Soc. Journal Issue: 10 ; 1991 Vol. 74; ISSN 0002-7820; ISSN JACTAW
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM OXIDES
DISTRIBUTION
DOPED MATERIALS
MAGNESIUM OXIDES
PORE STRUCTURE
SINTERING
SIZE
SMALL ANGLE SCATTERING
X-RAY DIFFRACTION