提高多组份玻璃光学纤维透过率的工艺研究

本文分析了影响多组份玻璃光学纤维光学透过率的因素,提出了生产多组份玻璃光学纤维时,通过对原料的预处理,多组份玻璃纤维光学结构的设计,双坩埚液面的控制及坩埚温度场控制等几方面的综合分析考虑,确定了光学纤维的生产工艺及其控制参数,光纤透过率比原来提高近１０个百分点。     

一种超耐切削液UV玻璃保护油墨的研制

针对光学玻璃显示屏在加工制备过程中玻璃表面易损伤等问题,研究并制备了一种超耐切削液UV玻璃保护油墨,并探究了不同光引发剂配比,UV树脂配比,活性稀释剂单体配比以及不同的附着力促进剂使用,对该玻璃油墨表干,附着力,耐切削液性能以及碱退性能研究。本文研制的超耐切削液UV保护油墨,其固化速度快,硬度适中2H,在玻璃基材上附着力良好,碱退时间为60 s,具有优异的耐切削液性能,即耐切削液时间为1.2 h。     

防眩玻璃制备工艺的研究

通过对玻璃侵蚀前后质量及光学性能变化的测试,系统地研究了在防眩玻璃的制备过程中,玻璃的腐蚀速率及其光学性能(包括透过率、反射率)等随侵蚀时间和温度等工艺条件变化的规律。研究结果表明,采用论文中选定的侵蚀液配方,效果最佳的防眩玻璃的制备工艺条件为20℃下侵蚀10 min。     

水平井腐蚀油管打捞工艺研究

气井作业过程中井内流体对井内油管存在腐蚀现象,导致油管出现管壁变薄、穿孔甚至断裂现象的发生,严重影响气井正常生产及后期的施工作业,同时也会对天然气开采的施工安全带来重大影响,需要将已腐蚀油管打捞出井筒。选取国内某气田发生油管腐蚀的水平井为研究对象,通过分析打捞施工过程中存在的问题,总结打捞过程及技术要点。     

(溶)氧腐蚀--一种容易被忽视的腐蚀形式

钢铁材料在大气中的氧腐蚀是人所共知的,人们对它的研究比较透彻。本文讲述的是另一种形式的氧腐蚀——溶解氧的腐蚀,即由于水中氧含量较高在一定外加条件作用下(如温度、酸碱度、固含量、水力冲刷等)而引起金属壁面的氧化破坏。在某些场合(如敞开式循环冷却水系统中),它成了设备损坏的主要原因。     

Seeded Stage III glass dissolution behavior of a statistically designed glass matrix

The dissolution rate of some glasses accelerates after prolonged time spent at a slow, residual dissolution rate. This phenomenon is referred to as Stage III behavior. The acceleration in glass dissolution rate linked to Stage III behavior is significant and may be the most impactful behavior to long-term performance of glass in a repository. This work is aimed at understanding the effect of glass composition on Stage III behavior to add a level of technical defensibility to glass disposal. To this end, a set of 24 glass compositions were statistically designed, where eight glass components (SiO₂, B₂O₃, Al₂O₃, CaO, Na₂O, SnO₂, ZrO₂, and Others) have been independently varied in order to study the individual effects of each glass component. These glasses have been subjected to static dissolution tests at 90°C in deionized water and then seeded with zeolite Na-P2 28 days into the testing to induce Stage III behavior. The response of the glasses to the zeolite seeds fell into four primary types: (1) no response to seeds; (2) an immediate linear sustained acceleration in the rate; (3) an immediate linear acceleration in the rate followed by a decrease; and (4) a progressive acceleration in the rate that is concurrent with the addition of the seeds. The main glass components observed to influence these behaviors were CaO, Al₂O₃, B₂O₃, and ZrO₂, where (1) CaO influenced which glasses showed a Stage III response to seeds (high CaO: types 2, 3, and 4) or did not respond to seeds (low CaO: type 1), (2) Al₂O₃ and B₂O₃ influenced which glasses showed a sustainable Stage III response (high Al₂O₃: types 2 and 4) versus transitory response (low Al₂O₃ and high B₂O₃: type 3), and (3) ZrO₂ concentration influenced whether glasses showed a linear (high ZrO₂: type 2) versus progressive (low ZrO₂: type 4) response to seeds.     

Roughness of oxide glass subcritical fracture surfaces

An original setup combining a very stable loading stage, an atomic force microscope and an environmental chamber, allows to obtain very stable subcritical fracture propagation in oxide glasses under controlled environment, and subsequently to finely characterize the nanometric roughness properties of the crack surfaces. The analysis of the surface roughness is conducted both in terms of the classical root mean square roughness to compare with the literature, and in terms of more physically adequate indicators related to the self‐affine nature of the fracture surfaces. Due to the comparable nanometric scale of the surface roughness, the AFM tip size and the instrumental noise, a special care is devoted to the statistical evaluation of the metrologic properties. The roughness amplitude of several oxide glasses was shown to decrease as a function of the stress intensity factor, to be quite insensitive to the relative humidity and to increase with the degree of heterogeneity of the glass. The results are discussed in terms of several modeling arguments concerning the coupling between crack propagation, material's heterogeneity, crack tip plastic deformation and water diffusion at the crack tip. A synthetic new model is presented combining the predictions of a model by Wiederhorn et al (J Non‐Cryst Solids, 353, 1582‐1591, 2007) on the effect of the material's heterogeneity on the crack tip stresses with the self‐affine nature of the fracture surfaces.     

蒙砂粉熟化过程与蚀刻玻璃表面的研究

固体蒙砂粉的熟化质量是决定玻璃蚀刻效果的重要因素。用X射线衍射（XRD）、能谱仪（EDS）、拉曼光谱、粘度计、Zeta电位和碱滴定等方法研究了用柠檬酸和氟化氢铵为主要成分配制的蒙砂粉的理化性质随熟化时间的变化规律,考察和评价了熟化时间对GG6手机盖板玻璃蚀刻效果的影响。结果表明：熟化时间为36 h,得到的熟化液的黏度和氢离子浓度最大,GG6玻璃蚀刻后的粗糙度为265 nm、雾度为84%、透光率为92.4%、光泽度为11.7%,符合工业上手机玻璃盖板的蚀刻加工质量要求,蚀刻后的GG6玻璃表面形成一层微量的氟硅酸物晶体,构成的微纳蚀孔结构更均匀。测定蒙砂液的理化性质能有助于更好地了解蒙砂粉的熟化过程,对蒙砂粉蚀刻工艺具有指导作用,提高玻璃防眩工艺的生产效率。     

Dissolution of silica component of glass network at early stage of corrosion in initially silica-saturated solution

Corrosion of glass in silica-saturated solution has been performed with the assumption that dissolution of silicate species from the glass network would not occur. Using surface-sensitive analytical techniques, we report experimental evidence suggesting the dissolution of silicate network species from a model nuclear waste glass, called international simple glass (ISG), in an aqueous solution initially saturated with soluble silica species. Results from low energy ion scattering and X-ray photoelectron spectroscopy reveal a complete depletion of mobile element species (B, Na) from the ISG surface and an enrichment of Zr on the outmost surface. In support of spectroscopic analyses, results from topographic imaging with atomic force microscopy show a stochastic dissolution of glass surface resulting in a higher surface roughness with increasing corrosion time in aqueous solution. This study shows that a true equilibrium between soluble silica species in the solution phase and silicate species in the glass network could not be warranted by performing corrosion experiments in the solution where dissolved silica species are initially equilibrated with amorphous silica in the presence of KOH. The leaching of mobile species (B, Na) could affect the saturation level of aqueous solution and induce further dissolution of the glass surface.     

玻璃熔窑鼓泡技术

介绍了鼓泡技术强制熔化的作用和机理,指出了玻璃熔制选用鼓泡技术时应注意的几个问题。     

Optical properties of bismuth tellurite based glass

A series of binary tellurite based glasses (Bi(2)O(3))(x) (TeO(2))(100-) (x) was prepared by melt quenching method. The density, molar volume and refractive index increase when bismuth ions Bi(3+) increase, this is due to the increased polarization of the ions Bi(3+) and the enhanced formation of non-bridging oxygen (NBO). The Fourier transform infrared spectroscopy (FTIR) results show the bonding of the glass sample and the optical band gap, E(opt) decreases while the refractive index increases when the ion Bi(3+) content increases.     

绿色本体着色玻璃的光学变形

介绍了改善绿玻光学变形质量的经验、措施和体会.     

Effect of alkali and alkaline earth metal ion as glass modifiers on the spectroscopic characteristics of Er3+-ion doped lead silicate glasses

The spectroscopic characteristics of Er-doped lead silicate glasses were investigated with respect to the effects of glass modifiers (Li⁺, Na⁺, K⁺, Mg²⁺, Ca²⁺, Sr²⁺, and Ba²⁺) with various optical basicities. Using the absorption spectra of the glasses, the Judd–Ofelt parameters of the glasses were calculated and examined, with an emphasis on the glass emission intensity ratio at 1572 nm. The spectra of the samples at low temperatures were examined, and the Stark splitting of Er3+ was investigated. The McCumber method was used to determine the emission cross sections of glasses. The SPM glass exhibited high values of full width at half maximum (51.24 nm) and the emission cross section at 1572 nm (1.908 × 10⁻²¹ cm²), with potential applications for guiding component design of 1.5-μm fiber lasers and amplifiers.     

Silica-free sealing glass for sodium-beta alumina battery

A CaO-Bi₂O₃-Al₂O₃-B₂O₃ glass system was studied as a sealant for sodium-sulfur battery. The thermal properties such as thermal expansion coefficient, glass transition, and softening temperature were determined by dilatometry and differential scanning calorimetry. Selected glasses, based on the thermal properties, were bonded with α-alumina substrate followed by aging in air at 400°C for 100 hours and in sodium vapor at 350°C for 100 hours. The interfacial compatibility and resistance to sodium vapor corrosion of the bonded and aged samples were evaluated by structural and microstructural analysis using X-ray diffractometer (XRD) and scanning electron microscope (SEM) attached with energy dispersive spectroscope (EDS). Helium leakage test was performed at room temperature to examine the sealing ability of the select glass. It is found that Bi₂O₃ increases the thermal expansion coefficient, decreases the glass transition and softening temperature, shows excellent interfacial compatibility and thermal cycling resistance, improves sealing ability, and degrades sodium corrosion resistance.     

Corrosion of ISG fibers in alkaline solutions

The corrosion behavior of glass fibers synthesized from the International Simple Glass (ISG) reference ingot, an international High‐Level Waste (HLW) borosilicate glass standard, is reported. Bundles of glass fibers were submerged in 120 mL of four different solutions of initial pH values (pH_i) of 9.5, 10.5, 11.5, and 12.5 for static corrosion testing. While all the experiments reached a residual corrosion rate after ~50 days, which remained approximately constant for the duration of the pH_i 9.5‐11.5 experiments, the pH_i 12.5 experiment underwent a Stage II→III dissolution transition after 57 days. This transition was preceded by a decrease in the Al concentration in solution followed by an increase in B and Si concentration in the leachate. Zeolite NaP2 was observed to form on these fibers via scanning electron microscopy and X‐ray diffraction—the crystallinity of the fibers was estimated to be ~40%‐45% (relative to amorphous component) after the Stage II→III transition. Transmission electron microscopy cross‐sectional imaging of sampled fibers revealed several porous layers on the pH_i 9.5‐11.5 samples, and a more aggressive alteration mechanism in the pH_i 12.5 fibers. Potential markers that indicate a transition from Stage II→Stage III corrosion are shown to occur based on experimental observations.