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고상반응에 의한 표면 및 체적확산 계수측정
Diffusion in and on Solid Oxides
HWAHAK KONGHAK, June 1973, 11(3), 157-163(7), NONE
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Abstract
Electron microprobe analysis was used to measure the distribution profile of nickel ion in and on the spinel layer during the spinel formation reaction from nickel oxide and alumina single crystals in the temperature range from 1,260o to 1,470 ℃. The volume and surface diffusion coefficients of nickel ion（Dv, Ds） obtained are:
Dv = 8.54×10-4 exp（-(48.6±5.8Kcal/mol / RT）) ㎠/sec,
Ds = 2.7×10-1 exp（-(20.5±1.2Kcal/mol / RT）) ㎠/sec,
A confits model was proposed for measurement of surface diffusion coefficient under free sintering of powder and the application was carried out for free sintering data of zinc oxide.
Dv = 8.54×10-4 exp（-(48.6±5.8Kcal/mol / RT）) ㎠/sec,
Ds = 2.7×10-1 exp（-(20.5±1.2Kcal/mol / RT）) ㎠/sec,
A confits model was proposed for measurement of surface diffusion coefficient under free sintering of powder and the application was carried out for free sintering data of zinc oxide.
