玻璃表面镀制增透膜的机理分析

本文论述了纳钙硅酸盐玻璃表面加镀增透膜层后形成的减反射原理，并介绍了增透膜在不同镀膜工艺中的多层膜材设计与优势。     

硼硅玻璃与可伐合金的封接机理与工艺探索

根据玻璃烧结原理和固溶体扩散原理,通过对硼硅玻璃烧结和4J29可伐合金氧化膜的分析,阐述了硼硅玻璃与可伐合金封接的机理。为解决普通封接所存在的玻璃电性能不高,以及封接界面密封性差、结合强度低等问题,建立了"回火→保温1→急冷→保温2→降温"的封接后处理工艺,以促进二次结晶。试验表明,该工艺有效提高了封接质量。     

浅谈平板的玻璃发霉机理与防护

本文综迷和探讨了平板玻璃发霉的机理和造成玻璃发霉的内外因素及条件。从八个方面阐述了玻璃受侵蚀的反应机理。提出了玻璃的各种防霉措施。     

钠钙玻璃药瓶的耐水性

钠钙玻璃输液药瓶是与人的生命攸关的包装产品,内表面耐水性符合HC2级,玻璃颗粒耐水性标志HGB值控制在限定值之内,在存储运输装卸过程中要避免发生碰撞。它是输液行业中盛装生理盐水、葡萄糖溶液等药液最安全的包装品。     

酸浸析对多孔玻璃性能的影响

以Na2O·B2O3·SiO2为玻璃制备系统,采用原子力显微镜、扫描电镜和氮气吸附仪分析了酸处理工艺制度对多孔玻璃孔容、平均孔径和孔径分布的影响,经过热处理和酸腐蚀后多孔玻璃的孔容可达0.8845cm3·g-1、平均孔径达76.55nm;相同H+离子浓度的盐酸和硫酸酸处理得到的多孔玻璃,其比表面积、孔容和平均孔径相差不大;用浓度为0.1mol·L-1的硫酸处理后多孔玻璃的平均孔径比浓度为1mol·L-1的略大,并对酸处理参数对多孔玻璃性质的影响进行了分析和讨论,为制备较大孔径的多孔玻璃介质奠定了基础.     

硼硅玻璃电熔炉设计和调试过程的体会

总结了设计和调试生产中性药用硼硅玻璃全电熔炉的经验,介绍了中性药用硼硅玻璃全电熔炉的结构,料方的调整经验,冷炉顶的保持和出料量的稳定等。     

全电熔硼硅3.3玻璃池窑的使用与维护

目前国内生产太阳能毛坯管的硼硅3．3玻璃全电熔玻璃池窑百座有余,怎样维护好、使用好,能够生产出高质量的产品,是一个十分迫切的问题。本文就全电熔玻璃池窑的使用与维护应注意的几个问题作一下介绍。     

浅析水玻璃涂料固化机理及提高其耐水性的途径

综述了近几年所研究的水玻璃的固化机理,以及提高其耐水性的途径,以促进和拓宽水玻璃的改性研究及应用领域。     

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.     

硼硅酸盐泡沫玻璃研究

以C和Sb2O3组合作为发泡剂,通过粉末烧结发泡工艺制备了硼硅酸盐泡沫玻璃,采用SEM观察了试样的微观结构形貌,并研究了试样的耐酸腐蚀性能.结果表明:当发泡剂C的质量分数为0.9%、Sb2O3的质量分数为8.1%时,在1200 ℃、保温30 min条件下,可以制备出平均孔径为0.2～1.0 mm、气孔分布较均匀的硼硅酸盐泡沫玻璃.试样中气孔结构主要与气泡内的气体压力、玻璃的表面张力和粘度有关.将试样浸泡在0.1 mol/L的稀硫酸中做耐酸腐蚀性实验,60 d内试样的质量先有微量增加后保持不变,这主要是由于稀硫酸进入试样的气孔结构中后形成了一层保护膜,从而阻碍了进一步的侵蚀.     

高强耐热平板玻璃的现状及前景展望

随着技术的进步,高强耐热平板玻璃的应用越来越广泛,需求也不断增加。文章对高强耐热平板玻璃的现状及我国现有实际情况进行了分析,指出了未来发展方向及一系列亟待解决的实际问题。     

Intumescent Fireproof Coating Based on Water Glass

Abstract

The effectiveness of fireproof intumescent coatings based on water glass can be considerably increased if the coagulated sodium water glass is used as an intumescent component. When heated, the coagulated sodium water glass creates a steam-gas cloud above the protected surface which together with foam formation decreases the temperature of the protected surface. The mixture of sodium water glass, portland cement and dehydrated clay which, besides adhesion, maintain the durability of the composition are used as binders due to their cohesive properties.     

Chemical durability of borosilicate pharmaceutical glasses: Mixed alkaline earth effect with varying [MgO]/[CaO] ratio

Glass for pharmaceutical packaging requires high chemical durability for the safe storage and distribution of newly developed medicines. In borosilicate pharmaceutical glasses which typically contain a mixture of different modifier ions (alkali or alkaline earth), the dependence of the chemical durability on alkaline earth oxide concentrations is not well understood. Here, we have designed a series of borosilicate glasses with systematic substitutions of CaO with MgO while keeping their total concentrations at 13 mol% and a fixed Na₂O concentration of 12.7 mol%. We used these glasses to investigate the influence of R = [MgO]/([MgO] + [CaO]) on the resistance to aqueous corrosion at 80°C for 40 days. It was found that this type of borosilicate glass undergoes both leaching of modifier ions through an ion exchange process and etching of the glass network, leading to dissolution of the glass surface. Based on the concentration analysis of the Si and B species dissolved into the solution phase, the dissolved layer thickness was found to increase from ~100 to ~170 nm as R increases from 0 to 1. The depth profiling analysis of the glasses retrieved from the solution showed that the concentration of modifier ions (Na⁺, Ca²⁺, and Mg²⁺) at the interface between the solution and the corroded glass surface decreased to around 40%–60% of the corresponding bulk concentrations, regardless of R and the leaching of modifier cations resulted in a silica-rich layer in the surface. The leaching of Ca²⁺ and Mg²⁺ ions occurred within ~50 and <25 nm, respectively, from the glass surface and this thickness was not a strong function of R. The leaching of Na⁺ ions varied monotonically; the thickness of the Na⁺ depletion layer increased from ~100 nm at R = 0 to ~200 nm at R = 1. Vibrational spectroscopy analysis suggested that the partial depletion of the ions may have caused some degree of the network re-arrangement or re-polymerization in the corroded layer. Overall, these results suggested that for the borosilicate glass, replacing [CaO] with [MgO] deteriorates the chemical durability in aqueous solution.     

水玻璃中可溶性碳酸盐的滴定分析法

研究了硅酸钡和ＢａＣＯ３的酸解条件，以及硅酸钠在加入强碱后体系的性质。建立了水玻璃中可溶性碳酸盐的滴定分析法。相对误差可在０．２％以下。     

大件厚壁玻璃陶瓷制品的成形问题

概述了影响大件厚壁玻璃陶瓷制品成形速度的一些主要因素，并指出了电泳法的优越性及其应用前景。     

单片硼硅酸盐防火玻璃使用澄清剂探索

针对硼硅酸盐防火玻璃熔化温度高、黏度大、澄清均化困难等特点,对硼硅酸盐防火玻璃澄清剂的选择和使用量加以探索研究,以满足浮法成形工艺生产硼硅酸盐玻璃的要求.