摘要
高硅氧发光玻璃因具有较好的热稳定性、化学稳定性等优点,成为极具潜力的荧光材料。针对其仍存在发光强度较弱的问题,从与发光性质紧密相关的制备工艺出发,分析各关键工艺参数对高硅氧玻璃发光性质的影响具有重要的意义。本文制备了关键工艺参数不同的Eu2+/Dy3+共掺高硅氧发光玻璃,通过测试微孔表面结构参数、发射光谱和红外吸收光谱等,研究了分相温度、溶液离子浓度和烧结温度等制备关键工艺参数对高硅氧发光玻璃光致发光性质的影响。当分相温度不同时,多孔玻璃微孔表面结构参数和高硅氧玻璃的发射光谱表明,分相温度通过影响多孔玻璃的比表面积间接的影响高硅氧玻璃的发光性质,多孔玻璃比表面积数值越大,高硅氧玻璃发光强度越大。当溶液离子浓度不同时,高硅氧玻璃的发射光谱表明,当溶液中Dy3+浓度增加,高硅氧玻璃中Dy3+和Eu2+发光增强;当Dy3+浓度大于0.1mol·L-1时,由于Dy3+的发光出现浓度猝灭效应,高硅氧玻璃整体发光强度减弱。当烧结温度不同时,高硅氧玻璃的发射光谱和红外吸收光谱表明,随着烧结温度升高,高硅氧玻璃中—OH残留量减少,发光强度增强;当烧结温度大于1 000℃时,高硅氧玻璃出现析晶,发光强度减弱。
In the present work, Eu2＋/Dy3＋ co-doped high silica glasses with different process parameters were prepared and the effect of critical process parameters including phase separation temperature, solution concentration and sintering temperature on the luminescence properties of Eu2＋/Dy3＋ co-doped high silica glasses was investigated by means of measuring pore surface parameters of porous glasses, emission spectra, infrared absorption spectra and densities of high silica glasses. Pore structure parameters of porous glass samples and emission spectra of corresponding high silica glass samples with different phase separa- tion temperatures show that the phase separation temperature has indirect effect on luminescence properties of high silica glass by influencing specific surface area value of corresponding porous glass. Specific surface area of porous glass changes when phase separation temperature changes. High silica glass achieves maximum emission intensity when the maximum specific surface area of porous glass is obtained. Luminescence intensity of high silica glass increases when specific surface area of porous glass increa- ses. Emission spectra of high silica glass samples with different solution concentrations show that the emission intensities of Eu2＋ and Dy3＋ in high silica glass are enhanced with the increase in the Dy3＋ concentration in solution; when the Dy3＋ concentra- tion is beyond 0. 1 mol . L-1 , the emission intensities of Eu2＋ and Dy3＋ in high silica glass are both decreased due to the occur- ring of concentration quench of Dy3＋ in the glass. Emission spectra and infrared absorption spectra of high silica glass samples with different sintering temperatures show that the emission intensity of high silica glass is increased with the increase in the sin- tering temperature because the content of residual hydroxyl groups --OH in the glass is decreased; when the sintering tempera- ture is beyond 1 000 ℃, the high silica glass exhibits crystalline and the luminescence intensity decreases.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2014年第1期34-38,共5页
Spectroscopy and Spectral Analysis
基金
国家自然科学基金项目(61007030)
中央高校基本科研业务费项目(CDJZ11120002
CDJXS11122218)资助
关键词
高硅氧
发光强度
发射光谱
发光玻璃
High silica
Luminescence intensity
Emission spectra
Luminescence glass
