Spontaneous reduction of Eu3+ ion in Al co-doped sol-gel silica matrix during densification
Spontaneous reduction of Eu3+ ion in Al co-doped sol-gel silica matrix during densification
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DOI：
10.1016/s0167-577x(99)00011-7
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发表时间：
1999-05
影响因子：
3
通讯作者：
A. Biswas;C. Friend;P. Prasad
中科院分区：
文献类型：
--
作者：
A. Biswas;C. Friend;P. Prasad
通过用Eu和Al的硝酸盐浸渍碱催化的正硅酸乙酯（TEOS）凝胶的孔并随后在1125至1150°C左右致密化来制备Eu和Eu-Al共掺杂的二氧化硅玻璃。这些玻璃的吸收、发射和激发光谱表明，在高于1000°C的烧结过程中，在Al 3+的存在下，Eu 3+离子自发地还原为Eu 2+。
Eu and Eu-Al co-doped silica glasses have been prepared by impregnating the pores of a base catalysed tetraethylorthosilicate (TEOS) gel with the nitrate salt of Eu and Al and subsequent densification around 1125 to 1150°C. Absorption, emission and excitation spectra of these glasses indicate that Eu3+ions are spontaneously reduced to Eu2+in the presence of Al3+during sintering of the glasses above 1000°C.