摘要
采用阶梯热处理的方式对Bi2O3-SiO2基玻璃进行析晶处理,得到了具有不同结晶率和透明度的Bi4Si3O12(BSO)基玻璃陶瓷。实验表明,分段热处理有利于控制BSO基玻璃陶瓷中晶粒的数量和尺寸,从而影响玻璃陶瓷的透明度和发光性质。分段热处理后样品的透射谱显示,BSO基玻璃陶瓷(在600℃保温1h,然后升温至8000C保温1h)的透过率可达73.1%(λ〉500nm)。制备出的BSO基玻璃陶瓷具有和BSO单晶相似的发光性质,在可见光波段(380-680nm)有发光,且发光强度与结晶率成正比。低温(14K)下,该BSO基玻璃陶瓷的发光强度较室温下提高了约12倍。
Bi4Si3O12-based glass-ceramics with different crystalline volume fractions and transparency were prepared by the two-step heat-treatment of Bi2O3-SiO2 based glass. The experimental results show that the two-step heat-treatment is favorable to control the amount and size of crystallized grains in BSO-based glass-ceramics, which correspondingly affects the transparency and optical properties of the obtained glass-ceramics. The transmission spec- tra of these samples indicate that the transparency of B SO-based glass-ceramic (annealed at 600~C for 1 h, then heated to 800~C and held for 1 h) can reach 73.1% (〉 500 nm). The BSO-based glass-ceramics maintain similar optical prop- erty as that of BSO single crystal, that is, the emission of such glass-ceramics is located in visible light wavelength of 380-680 nm, and their optical intensities are almost proportional to the crystalline volume fraction. The optical intensity of BSO-based glass-ceramic at low temperature (14 K) is increased by 12 times as against that at room temperature.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2014年第2期167-171,共5页
Journal of Inorganic Materials
基金
国家自然科学基金(50990304)~~