異なる組成の積層によるアルミナ配合磁器素地の高強度化

概要

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Strengthening of alpha alumina containing porcelain bodies was investigated by lamination with different compositions by two techniques. One was coating tech nique, in which the test bars were dip coated with slur ry of different batches, containing less amount of alpha alumina. Coating caused an increase in bending strength of 24% with adequate coating thickness. Nevertheless, a formation of a crack at the surface led to a decrease in strength remarkably if the surface lay er exceeded a critical thickness. The other was "double slip casting" technique laminated bodies were made from two batches designated as surface and internal layers by sequential slip casting. Double slip casting yielded thick surface layer without any crack, thus sub stitution of zircon for alumina at the surface layer in creased the mean bending strength from 38 to 44 kgf/ mm^2 and Weibun modulus from 6 to 17.
社団法人日本セラミックス協会の論文
1994-04-01