CAJ | 학술논문

以150nm Al2 O3粉为原材料，用真空烧结的方法来烧结Al2 O3陶瓷。实验发现：在真空条件下烧结时，氧化铝与石墨间会发生还原反应，使真空烧结得到的样品质量明显小于常压烧结样品的质量；而且，真空烧结样品的颜色由白色变成了灰色。其原因是在真空条件下烧结时，烧结气氛为还原性气氛，在样品表面产生氧空位。氧空位捕获电子，产生带有一个电子氧空位的F＋色心。
이150nm Al2 O3분위원재료，용진공소결적방법래소결Al2 O3도자。실험발현：재진공조건하소결시，양화려여석묵간회발생환원반응，사진공소결득도적양품질량명현소우상압소결양품적질량；이차，진공소결양품적안색유백색변성료회색。기원인시재진공조건하소결시，소결기분위환원성기분，재양품표면산생양공위。양공위포획전자，산생대유일개전자양공위적F＋색심。
In this paper ,using 150nm Al2 O3 powder as raw material ,Al2 O3 ceramics were fabri-cated by vacuum sintering method .It was found that :the reduction reaction can occurs between alu-minum and graphite under vacuum sintering ,so the quality of the samples obtained by vacuum sinte-ring were significantly less than those of the normal sintered ones ;Further ,the sample color varied from white to gray under vacuum sintering .The reason is that :under vacuum sintering conditions , the sintering atmosphere was reducing ,and then the oxygen vacancies were generated on the sample surface .Because the oxygen vacancy caught electrons ,the F+ color centers were formed with an elec-tron oxygen vacancy .