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首页> 外文期刊>Journal of Materials Engineering and Performance >Composition-Property Correlation in B2O3-SiO2 Preform Rods Produced Using Modified Chemical Vapor Deposition Technique
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Composition-Property Correlation in B2O3-SiO2 Preform Rods Produced Using Modified Chemical Vapor Deposition Technique

机译：改进的化学气相沉积技术制备的B 2 O 3 -SiO 2 预成型棒的成分-性能相关性

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摘要

Due to unique optical properties of high birefringent (Hi-Bi) fibers for sensing and coherent optical communications, there is a strong interest in process optimization at preform fabrication and fiber drawing stages. Boron-doped silica cladding acts as stress-applying part resulting in polarization properties of Hi-Bi fibers that are strongly dependent on chemical composition. Using modified chemical vapor deposition (MCVD) technique, B2O3-doped silica preform rods were synthesized under different precursor gas flow conditions. Qualitative information about B2O3-SiO2 system composition was derived from etching behavior in nonbuffered HF solution and subsequent microstructural examination using scanning electron microscope. Significant degree of B2O3 incorporation was seen in case of high BCl3:SiCl4 ratio and mild oxygen-deficient processing conditions. Increasing the B2O3 content to ~26 mol% led to a corresponding increase in coefficient of thermal expansion (CTE) to a maximum value of 2.35 ppm/K. The value of refractive index (RI), on the other hand, was found to decrease with increased B2O3 incorporation. A qualitative correlation between B2O3 and SiO2 system composition and physical properties such as CTE and RI was established.
机译：由于用于传感和相干光通信的高双折射（Hi-Bi）光纤具有独特的光学特性，因此对瓶坯制造和光纤拉伸阶段的工艺优化产生了浓厚的兴趣。掺硼的二氧化硅包层用作应力施加部件，导致Hi-Bi光纤的偏振特性强烈依赖于化学成分。利用改进的化学气相沉积（MCVD）技术，在不同的前驱体气体流动条件下，合成了掺有B 2 O 3 的二氧化硅预制棒。关于B 2 O 3 -SiO 2 系统组成的定性信息来自于非缓冲HF溶液中的蚀刻行为以及随后使用扫描电子显微镜进行的显微组织检查。当BCl 3 ：SiCl 4 比例高且温和时，B 2 O 3 的掺入程度显着氧气不足的加工条件。将B 2 O 3 的含量增加到〜26 mol％会导致热膨胀系数（CTE）相应增加，达到最大值2.35 ppm / K。另一方面，发现折射率（RI）的值随B 2 O 3 掺入的增加而降低。建立了B 2 O 3 和SiO 2 系统组成与CTE和RI等物理性质的定性关系。

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