セリア/ジルコニアセラミックス対のカチオン相互拡散に及ぼすミリ波照射の影響

抄録

We investigated the influence of millimeter-wave irradiation on the cation interdiffusion of ceria/zirconia ceramic couple. The interdiffusion coefficient as well as the moving distance of Matano interface under the millimeter-wave radiation increased in comparison with those under conventional heating method. The activation energy of interdiffusion under millimeter-wave irradiation was found to be lower than that obtained under conventional heating. The intrinsic diffusion for Ce⁴⁺ was enhanced, although that for Zr⁴⁺ remained almost unchanged. The relative degrees of enhancement could be interpreted by differences in MMW absorptivity between the two ceramics.