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首页> 外文期刊>European Journal of Glass Science and Technology, PartA. Glass Technology >Raw materials purification for the development of high performance infrared transmitting germanate glass fibres
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Raw materials purification for the development of high performance infrared transmitting germanate glass fibres

机译：用于开发高性能红外透射锗酸盐玻璃纤维的原料纯化

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摘要

Purification of raw materials by heat treatment of the precursor chemicals before melting has been investigated with the aim of lowering the hydroxyl (OH~-) content in germanium oxide (GeO2)-based glasses and hence producing correspondingly low loss germanate fibres. The process involved the introduction of an oxygen (O2) atmosphere over the raw materials during drying at 400°C, followed by prefusing at 900°C and then melting at 1200°C. In order to further decrease the OH~- content in this glass system, PbO was partially replaced by PbF2 in the following compositions: 56GeO2-(31-x) PbO-9Na2O-4Ga2O3-xPbF2 (x=0, 3, 6, 9, 15, 25, 31). Melting time, as another crucial parameter, was also studied and a further reduction of the OH~ absorption was achieved. Fourier transform infrared (FTIR) absorption spectroscopy was utilised for the analysis of OH~-absorption before and after purification and melting. These results suggest that a minimum loss of 6 dB/m is expected at a wavelength of 3·1 μm.
机译：为了降低氧化锗（GeO2）基玻璃中的羟基（OH〜-）含量，从而生产相应的低损耗锗酸盐纤维，已经研究了在熔融前对前体化学品进行热处理来纯化原材料的方法。该过程包括在400°C的干燥过程中在原料上引入氧气（O2）气氛，然后在900°C的温度下预熔融，然后在1200°C的温度下熔融。为了进一步降低该玻璃体系中的OH_-含量，在以下成分中PbO被PbF2部分取代：56GeO2-（31-x）PbO-9Na2O-4Ga2O3-xPbF2（x = 0，3，6，9 ，15，25，31）。还研究了熔融时间作为另一个关键参数，并进一步降低了OH〜的吸收。傅立叶变换红外吸收光谱用于纯化和熔化前后的OH〜吸收。这些结果表明，在3·1μm的波长下，预期的最小损耗为6 dB / m。

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