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本文介绍了氟化物玻璃和硫系玻璃的化学组成、特征温度和透射光谱。总结了一些稀土掺杂氟化物玻璃光纤激光器和放大器的性能.并具体阐述了硫系玻璃光纤在红外波段的被动化学传感应用。 相似文献
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采用飞秒激光直写显微加工方法,基于优化的激光参数,在超低膨胀微晶玻璃中制备了插入损耗为4.94 dB的单线型波导。利用拉曼散射光谱仪、X射线衍射仪和分光光度计对激光辐照前后微晶玻璃的结构及透过率进行了表征,利用扫描电镜和能谱仪表征了样品的截面形貌及元素分布,基于2%(质量分数)HF稀溶液腐蚀试验,对样品的抗化学腐蚀能力进行了表征,利用X射线光电子能谱仪对样品中锆离子和钛离子的价态进行了表征。结果表明,微晶玻璃经激光辐照后抗化学腐蚀性能下降,透过光谱中出现了微小但不可忽略的吸收带。结合X射线光电子能谱分析,证实这些现象是由微晶玻璃中Zr4+或Ti4+受激光辐照还原为具有更高化学活性的低价亚稳Zr3+或Ti3+造成的。 相似文献
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Ge-Ga-Sb-S硫系玻璃的二阶非线性光学效应研究 总被引:2,自引:2,他引:0
用传统的熔融冷却法制备了4种不同镓、锑比例的Ge-Ga-Sb-S硫系玻璃,研究了其透过率、热学属性、拉曼特性及其二阶非线性光学性能。结果发现:在GeS2玻璃中,引入镓能更好地提高其在紫外波段的截止波长,而引入锑能大大提高玻璃的二阶非线性光学性能;同时加入不同镓、锑比例导致在可见光波段透过率的不同使玻璃表现出透射和反射二次谐波的差别。 相似文献
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初步确定了GeS2-Ga2S3-CdI2准三元系统玻璃的形成区,并对其进行了XRD,DSC和TG综合热分析及红外、紫外一可见、密度和耐水性分析。玻璃转变温度大约在300~370℃之间,密度大约在2.900g/cm^3到3.300g/cm^3之间,耐水性较差。根据对所研究玻璃的紫外和红外光谱的系统研究,得出了Cdl2对GeS2-Ga2S3硫系玻璃的光学性质的影响如下:随CdI2的掺入,玻璃的红外和紫外截止波长基本不变,玻璃的透过范围大约为0.48-11.5μm。 相似文献
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GeS4 bulk glasses were prepared by the melt-quench technique and the samples were irradiated by 532-nm linearly polarized light. After the laser treatment, the photo-induced changes of the samples were investigated by UV-1601 speetrophotometer and optical second-order nonlinear tester. The results show that the transmittance of the samples around 532 nm obviously decreases and Bragg reflector forms, which is due to the production of photon-generated carriers. With the increase of laser pulse energy or the extension of irradiation duration, the Bragg reflector increases and gradually tends to be stable. These can be ascribed to the excitation- capture process of the carriers. After irradiation, the relaxation phenomenon results from the release of part of the absorbed energy in the glass matrix. And the fitting equation of the relaxation process is consistent with a conventional Kohlrausch stretched exponential function. The origin of the second harmonic generation (SHG) is because of the dipole reorientation caused by the photo-induced anisotropy in the glass. 相似文献
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Highly Penetrable Silicone Emulsion for Water-Repellent Concrete with Reserved Surface Recoatability
Highly stable and permeable silicone emulsions were prepared by encapsulating N-octyl triethoaysilane microdroplets into micelles of NH2-PDMS/SiO2.The conversion of siloxane to sub-1 μm emulsions,on one hand,endows the concrete with a highly hydrophobic internal surface.While,its outside surface maintains relatively high surface energy,which is beneficial for the post-coating of other polymers.As a result,the coated concreted can simultaneously acquire water repellency and ... 相似文献
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通过拉伸还原法制备出了含银和铜R2O-B2O3-SiO2系统的红外偏振玻璃,通过正交实验研究工艺参数对偏振玻璃消光比的影响,确定了合理的工艺参数为:热处理温度650℃左右、热处理时间24h左右、拉伸温度570℃左右、拉伸速度100~120mm/min。并在该组参数下制备出消光比达到46dB以上,透过率80%以上的红外偏振玻璃。 相似文献
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钇铝石榴石Y3Al5O12(Yttrium Aluminum Garnet, 简记为YAG)材料具有优异的光、热和电学性能, 引起了广泛关注。但高熔点和冷却过程中复杂的相选择机制, 使YAG熔体特别是熔点以下过冷区内的热物理性能参数获得困难。利用自主搭建的气动悬浮无容器激光加热装置, 基于受迫振动和光学描影等原理, 在1750~2650 K宽达900 K的温区内, 评测了YAG熔体的黏度、表面张力和密度。研究表明, 与Al2O3熔体相比, YAG熔体密度具有更高的温度敏感性, 具有高约1倍的平均线膨胀系数; 不同于表面张力随温度变化不敏感的Al2O3熔体, YAG熔体的表面张力随温度升高产生略微降低; 与Al2O3熔体的黏温关系相比, 在熔点以下的过冷区内发现YAG熔体具有更陡峭的黏温变化趋势。 相似文献