摘要
采用传统无压烧结工艺,以MgO为烧结助剂,制备出了透明性良好的α-Al2O3透明多晶陶瓷,测定了其吸收光谱、荧光光谱、激发光谱,并做了热释光测试.结果表明,吸收光谱存在192nm和225—250nm吸收峰,分别对应于F色心和F+色心.在荧光光谱的410nm处发现有明显的发射峰.结合对其激发光谱的研究,证明了对应于F和F+色心.热释光谱中存在368,456,614K三个热释光峰,其中456K的峰值是受热激发的电子与F+色心复合产生的.
Transparent polycrystalline α-Al2O3 ceramics were fabricated by conventional solid-state processing with MgO as additive. The absorption, excitation, emission spectra and thermoluminescence of α-Al2O3 transparent ceramics were investigated. There are two characteristic absorptions, one is centered at 192 nm, and the other at from 230 to 250 nm, which are caused by F＋ and F color centers, respectively. There is one obvious emission peak located at 410 nm. Based on the excitation spectra, it is shown that the emission peaks are caused by the absorption of F^＋ and F color centers. The thermoluminescence curves show three peaks centered at 368, 456 and 614 K, respectively. The peak centered at 456 K may be caused by F and F^＋ centers.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2010年第2期1333-1337,共5页
Acta Physica Sinica
基金
国家自然科学基金(批准号:60578041)
上海市科委国际合作基金(批准号:08520707300)资助的课题~~
