高折射率光色玻璃性能的研究

在普通光色玻璃的基础上,加入用于提高光色玻璃折射率的高价氧化物,制得了折射率大于1 60的光色玻璃.实验发现,高价氧化物的加入,明显提高了光色玻璃的折射率,并对玻璃的光色性能产生影响;同时讨论了热处理温度高低和热处理时间长短对高折射率光色玻璃光色性能的影响.结果表明:高价氧化物含量较高时,使得光色玻璃的光色性能变劣;热处理温度对高折射率光色玻璃光色性能的影响要比对普通光色玻璃的影响显著得多,玻璃的饱和透光率随着热处理时间的不同而不同.     

Al_2O_3对铋硼酸盐玻璃结构和性能的影响

通过FTIR、Raman、~(27)Al NMR、XRD、DSC等测试方法,研究了Al_2O_3含量对Bi_2O_3-B_2O_3-ZnO-SiO_2-Al_2O_3系统低熔点封接玻璃结构及热性能的影响。结果表明:玻璃转变温度及软化温度随着Al_2O_3含量的增加逐渐降低。当Al_2O_3含量≤3%时Al_2O_3在玻璃中主要以[AlO_4]四面体结构存在,充当网络结构形成体,热膨胀系数减小;当Al_2O_3含量3%时Al_2O_3在玻璃中主要以[AlO_6]八面体结构存在,破坏玻璃网络结构,热膨胀系数增大。当Al_2O_3含量为7%时,样品析出ZnAl_2O_4晶体,热膨胀系数随之减小。综上所述,当Al_2O_3含量为3%时,该系统低熔点玻璃具有较低的特征温度及较低的热膨胀系数且可避免高铋含量玻璃的析晶。     

晶化时间对ZnO-BaO-B_2O_3-SiO_2-TiO_2系统玻璃析晶和性能的影响

ZnO-BaO-B_2O_3-SiO_2系统玻璃可作为钛酸盐功能材料的烧结助剂来使用,通过研究ZnO-BaOB_2O_3-SiO_2-TiO_2玻璃析晶性能,可进一步研究其作为钛酸盐功能材料的烧结助剂所起到的作用。采用XRD、SEM等测试方法,对ZnO-BaO-B_2O_3-SiO_2-TiO_2系统玻璃析晶性能进行了研究,讨论了不同的晶化时间对该系统玻璃的析晶行为、微观结构、热膨胀性能及其化学稳定性的影响。结果表明,该系统玻璃中析出的是TiO_2晶体,随着晶化时间的加长,由单一的圆球状晶体转变为针状,晶化时间为18h时,TiO_2晶体颗粒发生团聚。晶化时间的延长,玻璃的热膨胀系数及特征温度降低,化学稳定性变好。     

Sb_2O_3对Cr、Mn离子在Na_2O-CaO-SiO_2系统玻璃的着色及性能影响

用传统熔融冷却法制备Cr离子和Mn离子着色的Na_2O-CaO-SiO_2系统玻璃。利用分光光度计分析不同含量的Sb_2O_3对Na_2O-CaO-SiO_2系统玻璃中Cr离子和Mn离子的着色影响,并利用热膨胀仪等测试分析了不同含量的Sb_2O_3对Na_2O-CaO-SiO_2系统玻璃的性能影响。结果表明,随着Sb_2O_3含量的增加,添加Cr离子的Na_2O-CaO-SiO_2系统玻璃由黄绿色转变为绿色,添加Mn离子的玻璃由紫色转变为无色。在Na_2O-CaO-SiO_2系统中,热膨胀系数及密度随着Sb_2O_3含量的增加而增大,但耐酸性逐渐降低。     

用正交法研究B_2O_3—La_2O_3—R_mO_n系统玻璃的着色与组成关系

本文用正交表试验方法[L_(18)(6~1×3~6)]来研究 B_2 O_3—La_2 O_3—RmOn 系统玻璃中不同组分和含量对近紫外—可见光谱区透过性能的影响规律,讨论了正交法在玻璃组成与性能研究中的高效性,并从本试验结果提出了改善玻璃吸收的途径。     

Er_2O_3对锂锌硅微晶玻璃热膨胀及力学性能的影响

使用晶化法制备以二硅酸锂为主晶相,P_2O_5为主要形核剂的锂锌硅微晶玻璃。引入稀土Er_2O_3掺杂Li_2OSiO_2-P_2O_5-ZnO系统基础玻璃。通过测试该系统微晶玻璃的差热曲线、X射线衍射图谱、高温粘度曲线和扫描电镜图像,研究引入Er_2O_3含量的变化对该系统微晶玻璃析晶性能、次晶相的种类和含量、高温粘度变化、析出晶粒的大小及分布情况和微晶玻璃抗弯强度的影响。结果表明:引入Er_2O_3提高该系统微晶玻璃的玻璃转化温度,提高锂锌硅微晶玻璃晶化热处理的温度,影响了次晶相偏硅酸锂晶相的析出,通过改变微晶玻璃次晶相的种类和含量,降低了体系的热膨胀系数,掺杂0.3%的Er_2O_3提高了二硅酸锂的析晶速率,并降低了该系统微晶玻璃的高温粘度,当Er_2O_3的掺杂量为0.3%时,该体系微晶玻璃获得最大的抗弯强度310 MPa。     

Bi_2O_3-P_2O_5二元系统玻璃性能

采用高温熔融的方法制备xBi_2O_3-(100-x)P_2O_5二元系统玻璃,研究了Bi_2O_3含量变化对该体系玻璃的结构、热膨胀系数、密度和化学稳定性等的影响。在二元系统中随着Bi_2O_3含量的增加,熔融温度不断升高。当Bi_2O_3摩尔分数达到30%,在1 200℃下熔制且保温2h的玻璃液均化程度高、成玻性能良好,化学稳定性达到最好。随着Bi_2O_3含量的增加,热膨胀系数呈先减小后增大的趋势,在Bi_2O_3摩尔分数为25%出现最小值。     

异相型玻璃中热应力—光色性研究

研究了一种含ＺｒＯ２的ＡｇＸ光色玻璃在不同冷却条件下所产生的宏观热应力对玻璃光色性能的影响。实验结果表明：宏观热应力对玻璃饱和变暗光密度未见明显影响。     

R_2O-CaO-Al_2O_3-B_2O_3-SiO_2-P_2O_5玻璃的制备及性能

采用高温熔融的方法制备R_2O-CaO-Al_2O_3-B_2O_3-SiO_2-P_2O_5多元系统乳浊玻璃,运用FT-IR、SEM和XRD对玻璃的结构和分相进行了分析,测试了玻璃的热膨胀曲线、耐水性、显微硬度和釉烧性能。研究了以MgO-CaO取代Na_2O对玻璃乳浊程度以及其结构与性能的影响。结果表明,随着Na_2O含量的降低和MgO-CaO含量的增加,玻璃的乳浊程度逐渐降低最后趋于透明,热膨胀系数表现出递减的趋势,而转变温度和软化温度呈逐渐升高的趋势;化学稳定性优异且逐渐增强,玻璃水解等级均为一级。     

钠钙玻璃中引入钨尾矿对其性能的影响

钨尾矿是钨矿选矿过程中排放出的废料,呈砂粒状,含有 SiO_2、Al_2O_3、CaO、K_2O、Na_2O、CaF_2和 WO_3.在钠钙玻璃配料中引入钨尾矿后,玻璃熔体中的气泡和砂粒数量减少,玻璃的粘度和软化点降低.研究了引入不同量的钨尾矿对玻璃性能的影响,获得了令人满意的结果.     

Preparation,Structures,Thermal Properties and Sintering Behaviors of B_2O_3-SiO_2-ZnO-BaO-Al_2O_3 Glass

B_2O_3-SiO_2-ZnO-BaO-Al_2O_3 glass with different Al_2O_3 contents(1mol%, 3mol%, 5mol%, and 7mol%) was prepared, and it was intended to be used as lead-free and low-melting glass sealants for solid oxide fuel cells. The effects of Al_2O_3 content on the structures, thermal properties, and sintering behaviors of the B_2O_3-SiO_2-ZnO-BaO-Al_2O_3 glass were investigated in detail. The Al_2O_3 content largely influenced the structures and thermal properties of the glass. When the Al_2O_3 content 5mol%, the transition temperature of the glass decreased with the Al_2O_3 content, while the crystallization temperature increased with the Al_2O_3 content. However, higher Al_2O_3 content degraded the stability of the glass. The B_2O_3-SiO_2-ZnO-BaO-Al_2O_3 glass with 5 mol% Al_2O_3 content exhibits the optimal sintering densification characteristics and can be used as glass sealants for solid oxide fuel cells.     

光色玻璃AgX析出动力学探讨

本文研究了光色玻璃变暗深度随显色热处理时间的变化规律。通过假定玻璃初始透明态到饱和变暗状态吸光度的增加值与玻璃中AgX的析出量成正比,分析了显色热处理过程中AgX从玻璃基体中析出的动力学特征。     

THE INFLUENCE OF HEAT TREATMENT ON OPTICAL PROPERTY OF ION EXCHANGE PHOTOCHROMIC GLASS

In this paper, the influence of heat treatmenton transmittance and the photochromic of ion exchange pho-tochromic glass was studied, the microstructure of glass aswell as the forming of AgX crystals were discussed. It is be-lieved that heat treatment temperature affects precipitating ofAgX crystal .and the AgX crystal is a dominant factor af-fecting surface photochromic properties of ion exchange pho-tochromic glass.     

Influence of addition of B2O3 on properties of Yb^3＋-doped phosphate laser glass

The three host glasses doped with Yb^3＋ were prepared by means of conventional melt quenching technology, and the influence on physical and spectral properties of phosphate glass due to addition of B2O3 was investigated and compared with silicate glass. The results show that due to the existence of OH^- impurities which induce the non-radiative route, the fluorescence lifetime of phosphate glass is shorter, so silicate glass has better spectral properties than phosphate glass. Silicate glass has more excellent thermal-mechanical properties than phosphate glass, but with the addition of B2O3, thermal-mechanical properties of phosphate glass are improved greatly without fluorescence quenching effect, and this kind of borophosphate glass will be the candidate to be used in high average power solid state laser.     

Preliminary Study on Combining K_2O-Al_2O_3-SiO_2 System Dental Glass Ceramic with Al_2O_3 Ceramic

Relationship between K_2O-Al_2O_3-SiO_2 system dental glass ceramics and Al_2O_3 ceramics was investigated. 4 groups of glass ceramic with the same components but different thickness(0.8, 1.2, 1.6, and 2.0 mm) were sintered on Al_2O_3 base ceramics according to the same thermal treatment system of leucite micro-crystallization reported in previous literatures. The products of each group were analyzed by polarizing microscope, X-ray diffractometer, and an INSTRON material testing machine. Under the thermal treatment system, leucite crystals were formed in samples of each group, and dispersed evenly. Meanwhile, the compressive strengths of group 3 and group 4 were higher than those of group 1 and group 2. Samples of group 3 showed better mechanical properties than others. The conclusions are drawn that Leucite crystals can be controlled in K_2O-Al_2O_3-SiO_2 system glass ceramic-Al_2O_3 ceramic composite material, and the thickness of glass ceramic has a notable influence on the compressive strength of this ceramic composite material.     

Effect of B2O3 on the Structure and Photoluminescence Properties of Sol-gel Glass Doped with Terbium Organic Complex

Both silica and boron-silica glass materials doped with terbium organic complex were prepared by in situ sol-gel method respectively. XRD and SEM measurements were performed to verify the non-crystalline structure of the glass. The influence of the glass contents on the structure of the glass and the erwrgy level of the doped Tb （Ⅲ） ions was analyzed by the emission spectra and IR spectra. The effect of B2O3 on the photolumirwscence properties of rare earth organic complex in silica- based glass was investigated. The IR spectra indicate that the in situ sylthesized rare earth complex molecule was confined to the micropores of the bost and the vibration of the ligands was frozen. When B2O3 was added into the silica host gel, B2O3 had little influence on the noncrystallirw structure of the glass, and BO3 triangle, which had a layer structure different from the silica framework, could form. So the silica network became more inhomogenous, and the luminescence of terbium complexes was quenched with the increase of the B2O23 amount.     

煤矸石工业燃料的燃烧产物及其燃烧反应

利用红外光谱和X射线衍射对华北某热电厂高岭石型煤矸石工业燃料炉渣样品的化学成分和矿物组成进行了实验分析,用SiO2-Al2O3相图研究了高岭石型煤矸石燃料的燃烧反应以及炉渣在冷却过程中发生的变化及其反应产物。高岭石型煤矸石工业燃料炉渣的主要化学成分：W（SiO2）48．70％,W（Al2O3）40．37％,W（CaO）2．92％,全铁3．32％;燃烧产物有莫来石、SiO2和Al2O3玻璃体,有时含有一定的α-石英。     

生物活性微晶玻璃结构与性能研究

本文以K_2O—MgO—Al_2O_3—B_20_3—SiO_2—F系统玻璃作为基础玻璃,添加适量的CaO和P_2O_5,制得了一种具有良好生物活性、生物相容性和可切削加工性能的微晶玻璃。并利用DTA、XRD、SEM、EDAX及偏、反光显微镜技术,研究了结晶化处理前后玻璃的显微结构、分相形貌和元素分布等。对玻璃分相与析晶机理进行了理论探讨,测定了材料的各项理化性能和可切削性能。对材料进行了动物骨内种植和肌肉包埋实验,并做了Ames致突变试验,以检测材料的生物活性和生物相容性。结合以上实验结果,对材料的生物活性机理进行了分析和讨论,得出了一些有益的结论。     

高温吸波涂层的制备及其力学性能研究

以BaO-La2O3-B2O3系玻璃为粘结剂,S iCN纳米吸收剂作为添加剂,采用热压粘涂法在钛合金板表面制备了一系列涂层。文中分析了BaO-La2O3-B2O3系玻璃的性能,探索了粘涂工艺和S iCN纳米粉含量对涂层抗拉强度的影响机理。结果表明含有吸收剂的涂层粘接强度低于不含吸收剂的涂层,由于涂层内存在S iCN纳米粉团聚现象,拉伸时趋于内聚破坏,而界面的结合则比较致密。随着吸收剂含量的增加,涂层的抗拉强度明显降低。     

微晶搪玻璃釉的研制

以Na1O-B1O3-TiO2-SiO2、Li2O-Al2O3-SiO2玻璃系统为基础，制备微晶搪瓷，借助于XRD、SEM、耐酸性测试、密着性测试等分析测试方法确定了析晶与组成的关系，并对搪玻璃釉的耐酸性能以及搪玻璃的缺陷进行了探讨。