Influence of the thermal conductivity on the growth of halide single-crystal fibers

Yiding Wang; TieCheng Liu; Hong-Bo Sun; Yu-Dong Li; TianQuan Lu; Shiyong Liu

doi:10.1117/12.252023

20 September 1996 Influence of the thermal conductivity on the growth of halide single-crystal fibers

Yiding Wang, TieCheng Liu, Hong-Bo Sun, Yu-Dong Li, TianQuan Lu, Shiyong Liu

Proceedings Volume 2893, Fiber Optic Components and Optical Communication; (1996) https://doi.org/10.1117/12.252023
Event: Photonics China '96, 1996, Beijing, China

Abstract

Some conclusions have been drawn from the growth of KCl and AgCl optical fiber in the present paper. There is a temperature region with gradient near the solid-melt interface. The phase change latent heat is transmitted by the grown crystal. According to thermal transmission equation, the thermal conductivity (TC) in crystal, K_s, and that in melt, K_m, near the solid-melt interface affect strongly on the temperature gradient along the grown axis in crystal and melt. Generally, thermal conductivity in crystal K_s is greater than that in the melt, K_m. Similarly, K (metal) > K (nonmetal). TC of non-conducting crystal and metal will reduce with temperature increased TC in conducting liquid is 10 - 1000 times greater than that of non-conducting liquid. Halide ionic crystal with NaCl-type structure is nonconductor, whose TC K_s 1/T, in vicinity of melting point. However halid melt is conducting and its TC, K_m, increases as greatly as to transcend the value of K_g. Therefore the temperature gradient in crystal is inevitably greater than that in melt near the solid-melt interface.

Citation Download Citation

Yiding Wang, TieCheng Liu, Hong-Bo Sun, Yu-Dong Li, TianQuan Lu, and Shiyong Liu "Influence of the thermal conductivity on the growth of halide single-crystal fibers", Proc. SPIE 2893, Fiber Optic Components and Optical Communication, (20 September 1996); https://doi.org/10.1117/12.252023

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