A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
METHOD FOR MANUFACTURING ALUMINA SINTERED BODY AND ALUMINA SINTERED BODY
A method for manufacturing an alumina sintered body, according to the present invention, includes the steps of (a) obtaining a compact by putting a slurry containing an Al2O3 powder, a MgO powder, a MgF2 powder, a solvent, a dispersing agent, and a gelatinizer into a mold, gelatinizing the slurry by a chemical reaction of the gelatinizer in the mold, and causing mold release, (b) obtaining a calcined body by drying the compact, performing degreasing, and further performing calcination, and (c) obtaining a ceramic sintered body by subjecting the calcined body to hot-press firing at 1,150° C. to 1,350° C. In the step (a), the Al2O3 powder having a purity of 99.9 percent by mass or more is used and 0.1 to 0.2 parts by mass of MgO powder and 0.13 parts by mass or less of MgF2 powder relative to 100 parts by mass of Al2O3 powder are used.
METHOD FOR MANUFACTURING ALUMINA SINTERED BODY AND ALUMINA SINTERED BODY
A method for manufacturing an alumina sintered body, according to the present invention, includes the steps of (a) obtaining a compact by putting a slurry containing an Al2O3 powder, a MgO powder, a MgF2 powder, a solvent, a dispersing agent, and a gelatinizer into a mold, gelatinizing the slurry by a chemical reaction of the gelatinizer in the mold, and causing mold release, (b) obtaining a calcined body by drying the compact, performing degreasing, and further performing calcination, and (c) obtaining a ceramic sintered body by subjecting the calcined body to hot-press firing at 1,150° C. to 1,350° C. In the step (a), the Al2O3 powder having a purity of 99.9 percent by mass or more is used and 0.1 to 0.2 parts by mass of MgO powder and 0.13 parts by mass or less of MgF2 powder relative to 100 parts by mass of Al2O3 powder are used.
METHOD FOR MANUFACTURING ALUMINA SINTERED BODY AND ALUMINA SINTERED BODY
NOBORI KAZUHIRO (author) / KIMURA TAKUJI (author)
2016-09-29
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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