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Study on Thermal Conductivity of Li_2O-Al_2O_3-SiO_2 Glass-Ceramics

Feng Cuiying (Analysis and Research Centre,Tongji University)Zheng Hong Zhao Mingzhou (Pohl Institute on Solid State Physics,Tongji University)  
The specific heat of Li_2O-Al_2O_3-SiO_2 glass ceramics was measured by DTA,andits thermal diffusivity by laser-flash diffusivity technique,from which the relation-ship between thermal conductivity coefficient and crystallinity was obtained.Furthe-rmore,the regularity in the variation of phonon mean free path with increase incrystallinity was obtained by calculation.
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