摘要
采用熔融淬冷法制备了20GeSe2-(80-x)Sb2Se3-xCsCl(x=2,4,8,10mol%)硫卤玻璃系统,测试了样品在可见至中远红外区域的透过光谱,研究了硫卤玻璃中CsCl对玻璃短波吸收限的影响;并测试了典型的20GeSe2-76Sb2Se3-4CsCl样品在不同升温速率下的DTA曲线,利用非等温方法研究了其析晶动力学;结果表明,引入CsCl后降低了非键孤对电子所处的能级能量,导致禁带宽度Eg变大,短波吸收限蓝移.而较之经典的Johnson-Mehl-Avrami(JMA)模型,双参数的自催化est偄k-Berggren(SB)模型可以更好地描述样品的析晶动力学过程.
Chalcohalide glasses 20GeSe_2-（80-x）Sb_2Se_3-xCsCl（x=2,4,8 ,10 mol%）were synthesized by the conventional melt-quenching method. The optical transmission spectra were measured from the visible to the far-infrared range. The effect of CsCl content on the short-edged wavelength was investigated. Moreover,the differential thermal analysis curves of a typical 20GeSe_2-76Sb_2Se_3-4CsCl glass were measured under different heating rates,and its cryst allization kinetics was analyzed under the non-isothermal condition. The results show that,the introduction of CsCl into the glass lowers the non-bonding energy level,which leads to the increase of the electronic bandgap E_g,and blue-shift of the short edged wavelength. Compared with the conventional Johnson-Mehl-Avrami model, the autocatalytic model gives a better description of the kinetic process for the glass sample.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2010年第3期2045-2050,共6页
Acta Physica Sinica
基金
国家自然科学基金(批准号:60878042
60908032)
浙江省自然科学基金(批准号:Y1090996)
宁波市自然科学基金(批准号:2007A610004)
宁波大学人才基金(批准号:2006494)
宁波大学王宽诚幸福基金资助的课题~~
关键词
硫卤玻璃
非等温过程
析晶动力学
chalcohalide glass
non-isothermal process
crystallization kinetics
