Tellurite glass with low thermal expansion and high thermal stability and preparation method thereof

Abstract

Tellurite-based glass with low thermal expansion and high thermal stability and a preparation method thereof. The tellurate-based glass is made from TeO2, Na2O, ZnO, B2O3 and GeO2. The preparation method provided by the invention comprises the following steps of: carrying out ball milling on raw materials corresponding to each of the above oxides, sieving through a sieve of 80 meshes, and uniformly mixing to obtain a batch material; placing the batch material into a corundum crucible, immersing by the use of CCl4, placing into an electric resistance furnace for melting, casting the molten glass liquid into a metal (such as stainless steel and the like) or nonmetal (such as graphite and the like) die for moulding, and annealing to obtain transparent and uniform bulk glass with no bubble. Er<3+> ion also can be doped into the tellurate-based glass. The Er<3+> ion-doped tellurate glass material prepared in the invention has the following characteristics: the thermal expansion coefficient is 8.67-14.99*10<-6> / DEG C; the glass transition temperature is 330-414 DEG C; the crystallization peak temperature is greater than or equal to 552 DEG C; the softening temperature is greater than or equal to 371 DEG C; delta T is greater than or equal to 152 DEG C; the fluorescence half-width is 57-63; the stimulated emission cross section is 6.829-10.864*10<-21>cm<2>; and the comprehensive properties are excellent. In the meanwhile, the preparation method provided by the invention is simple and requires low melting temperature and low production cost, and the prepared tellurite glass with low thermal expansion and high thermal stability can replace currently used fiber materials in the field of optical communication.

Description

technical field [0001] The invention relates to tellurite glass with low thermal expansion and high thermal stability and a preparation method thereof, belonging to the technical field of glass materials and its preparation. technical background [0002] The rapid development of informatization requires communication networks to have higher transmission capacity, and an effective way to increase transmission energy is to use optical fiber amplifiers. Optical fiber amplifiers have real-time, high-gain, broadband, online, low-noise, and low-loss all-optical amplification functions, and are indispensable key components in the new generation of optical fiber communication systems. Among them, since the erbium-doped fiber amplifier (EDFA) can amplify multiple WDM optical signals at the same time, there is no need for follow-up work related to photoelectric conversion, which makes WDM long-distance transmission possible and paves the way for the realization of long-distance and la...

AI Technical Summary

Problems solved by technology

[0006] 1) The thermal expansion coefficient is high, which is not conducive to the production of optical fiber core materials, optical fiber cladding materials or other optical components. The materials are brittle, low in strength, and difficult to draw optical fibers; during use, optical fibers are easily affected by temperature changes

[0007] 2) The thermal stability is poor. Due to the narrow range of crystallization temperature and glass transition temperature, the optical fiber drawing process is difficult to control. During the optical fiber drawing process, glass is prone to crystallization, which is not conducive to practical application and industrialization

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