Li2O-ZnO-SiO2系高膨胀微晶玻璃的制备和研究

利用传统熔体冷却方法制得了以P2O5为晶核剂的Li2O-ZnO-SiO2系统玻璃，并探索了该系统微晶玻璃的制备工艺。同时借助X-射线衍射仪和膨胀系数测定仪确定了试样的晶相种类、基础玻璃的转化和软化温度并对玻璃膨胀系数进行了测定，探讨了热处理时间对微晶玻璃膨胀系数的影响，从而对该系统玻璃焊料与金属封接的应用前景作了分析。     

含Bi2O3低熔点玻璃的制备及性能研究

采用熔融急冷法制备了含有Bi2O3的B2O3-SiO2系玻璃，确定了Bi2O3-B2O3-SiO2玻璃的成玻性能、转变温度（Tg）和热膨胀系数，通过XRD、DTA及热膨胀仪确定了该系统易熔封接玻璃的玻璃化范围，以及玻璃的转变温度和玻璃的热膨胀系数与玻璃组成的关系。     

Na2O-Al2O3-B2O3系统低熔点玻璃的热学性质研究

介绍了Na2O-Al2O3-B2O3系统玻璃的制备，确定了Na2O-Al2O3-B2O3系统玻璃的成玻范围，研究了玻璃的转变温度（Tg）、软化温度（Tf）和热膨胀系数（α），以及玻璃的Tg、Tf、α与玻璃组成的关系。     

磷酸盐钕玻璃化学稳定性的研究

建立了一种测定磷酸盐钕玻璃对水的化学稳定性的新方法。用此法研究了P_2O_5-BaO系统、P_2O_5-Al_2O_3-BaO系统以及P_2O_5-Al_2O_3-Li_2O-BaO系统玻璃的化学稳定性及以八种金属氧化物替代部分BaO对玻璃化学稳定性的影响,由玻璃结构和玻璃中阳离子的极化能力对实验结果进行了解释。在实验结果和对玻璃侵蚀机理的简要讨论的基础上指出了磷酸盐玻璃加速侵蚀的现象。     

MgO-Al2O3-SiO2系统微晶玻璃晶化行为及性能研究

制备了MgO-Al2O3-SiO2系微晶玻璃，用XRD．DTA，SEM等方法对该系统微晶玻璃材料的析晶过程进行了研究。在此基础上，讨论了晶化行为对微晶玻璃的热学及力学性能的影响。结果表明：材料的热学性能及力学性能取决于热处理工艺。晶化温度950～980℃段，微晶玻璃武样的致密性好，力学强度优良。     

氧化物自身的耐碱性与氧化物对玻璃耐碱性的影响

通过测定SiO2-TiO2-Al2O3-MO-R2O系统逆性玻璃的耐碱性,及由玻璃转入碱侵蚀液中的各氧化物的量,分析了氧化物自身的耐碱性与氧化物对玻璃耐碱性的影响关系,得出了该系统中氧化物自身的耐碱性序列及氧化物对玻璃耐碱性影响的序列.     

Na-Ti-Si氧化物Ti元素的化学状态分析

利用熔融方法制备了Na2O-TiO2-SiO2系统玻璃样品，用IR以及XPS等测试手段对系统玻璃样品结构进行了分析。结果表明：Na2O-SiO2-SiO2系统玻璃中Ti^4 离子可以部分地取代Si^4 离子的位置而以网络形成体的形式参与成玻。此外，通过对该系统玻璃的XPS钛元素的化学状态分析，认为该系统玻璃中Ti^4 离子存在[TiO4],[TiO6]等几种不同的微结构单元，并且随着玻璃中TiO2含量的增加，该系统玻璃中四方双锥结构的[TiO6]与正四面体结构的[TiO4]之比增大。     

多孔玻璃微珠的研制及其吸附性能研究

对多孔玻璃微珠作为多孔性固体吸附剂的研制及其在液相中的吸附性能作了初步研究，研制出适合于制作多孔玻璃微珠的Na2O-B2O3-SiO2系统玻璃组分，设计了新型的玻璃微珠成珠设备及工艺，利用该组分的玻璃经研磨，成珠、分相、酸溶和膜化等处理方法，制得了直径为1～10μm，孔径约为10nm的多孔玻璃微珠，用氮吸附静态容量法，测得了多孔玻璃微珠的氮吸附等温线、比表面和孔分布曲线，通过多孔玻璃微珠对苯酚、聚氧乙烯醚和聚丙二醇等有机物的吸附实验，给出多孔玻璃微珠对它们的吸附等温线，并指出合理的吸附温度，大的比表面和适当的膜化工艺对提高多孔玻璃微珠的吸附量都是有效的。     

固体可逆接触式微型玻璃电极的成分与性能

体可逆接触式玻璃电极以固体合金代替溶液，可解决常用的液体接触式玻璃电极安全性问题，而且易于微型化。本文研究了固体可逆接触式玻璃电极敏感玻璃所用Li2O—La2O3—Ta2O5—SiO2系统成分及物理化学性质，用La2O3代SiO2对玻璃析晶、软化点、膨胀系数、耐水性和电导率的影响。用所研究成分制成的微型玻璃电极在pH1～7间转换系数96％以上，与pH值对应的响应电势E呈直线关系，有较好的氢离子选择功能，滞后误差小，测定数据的重复性也较好，符合医用微型玻璃电极的性能要求。     

含Cu^＋离子的低膨胀微晶玻璃

本文研究了Cu_2O-Al_2O_3-nSiO_2系统和Li_2O-Cu_2O-Al_2O_3-nSiO_2系统玻璃的性能及热处理条件。用DTA,X射线衍射及SEM研究了该系统的主晶相。测定了玻璃及微晶玻璃的热膨胀系数,讨论了组成、结构和性能之间的关系。     

Controllable Formation of the Crystalline Phases in Ge–Ga–S Chalcogenide Glass‐Ceramics

We prepared chemically stoichiometric, S‐poor and S‐rich Ge–Ga–S glasses and annealed them at a temperature that was 20°C higher than its respective glass transition temperature. We aimed at tuning the formation of the different crystals in chalcogenide glass‐ceramics. Through systematic characterization of the structure using X‐ray diffraction and Raman scattering spectra, we found that, GeS₂ and GeS crystals only can be created in S‐rich and S‐poor glass‐ceramics, respectively, while all GeS, Ga₂S₃, and GeS₂ crystals exist in chemically stoichiometric glass‐ceramics. Moreover, we demonstrated the homogeneous distribution of the crystals can be formed in the S‐rich glass‐ceramics from the surface to the interior via composition designing. The present approach blazes a new path to control the growth of the different crystals in chalcogenide glass‐ceramics.     

Characterization of New Categories of Bioactive Based Tellurite and Silicate Glasses

New types of tellurite glass ceramics were prepared and studied from the viewpoint of bioactivity. The obtained results were compared with those of silicate glass ceramics. The crystallization behaviors of both silicate and tellurite glass ceramics with equal ratio of CaO/P₂O₅ were investigated. The silicate glass samples were transformed to glass ceramics by a thermal treatment process. While the tellurite glass ceramics were directly obtained without any thermal treatment. The microstructure of these materials was characterized by X-ray diffraction (XRD), Fourier transform infrared absorption spectroscopy (FTIR) and a scanning electron microscope (SEM) equipped with an energy dispersive spectrometer (SEM/EDX). The results revealed clear proof that TeO₂ promoted the nucleation and crystallization processes which led to the formation of different crystalline bio-phases. While the silicate glasses showed a much lower degree of crystallinity than that presented by the tellurite glass ceramics. The crystals of tellurite containing glass were needle- like morphology, which is attributed to the one-dimensional rapid growth of the apatite-tellurite phase. On the other hand, a particle-like morphology is shown in the silicate glass matrix. Bioactivity of the glasses in simulated body fluids (SBF) was investigated. Tellurite containing glass ceramics showed a better bioactivity during the in vitro test than that of the silicate one. This was attributed to a great analogous between the morphology of crystals of tellurite glass and the morphology of hydroxyapatite in human bone, since both possess a needle-like morphology.     

透明氟铝酸盐微晶玻璃研究

为改善氟化物玻璃的物理化学性能,对氟铝酸盐玻璃进行了晶化实验,制备了透明氟铝酸盐微晶玻璃.对微晶玻璃进行了X射线衍射(XRD)、透射光谱研究和扫描电镜(SEM)观察.结果表明:热处理温度不同,玻璃中析出的晶相会有差异.微晶玻璃中有一些异常的大尺寸晶体,这些晶体的存在影响玻璃中晶体的均匀性,降低微晶玻璃的红外透过能力.     

Molded Glass–Ceramics for Infrared Applications

In this paper, the feasibility to make molded glass–ceramics transparent in the second and third atmospheric window has been investigated. The thermodynamical and viscosity properties of the base glass have been measured confirming the possibility of generating crystals during molding at different temperatures. ⁷¹Ga nuclear magnetic resonance confirms that gallium plays the role of nucleating agent of gallium in this glass. Examination of X-rays diffraction patterns and optical properties indicates that the generation of nanocrystals of GeGa₄Se₈ allows the glass–ceramics to keep a wide transparency in the infrared range from 2 to 15 μm. The crystallization of large GeSe₂ crystals of at higher temperature induces scattering and a reduced transparency window. The mechanical and structural properties of the as-prepared glass ceramics show an increase of toughness from 0.188 to 0.387 MPa m^1/2 and elastic modulus from 22.7 to 26.55 GPa while the number and size of crystals increase. As a result, the preparation of molded IR glass–ceramics with high resistance to thermal and mechanical shocks has been clearly demonstrated.     

Tb3+掺杂钼酸盐玻璃陶瓷的制备及发光性能表征

采用熔融-晶化法制备了Tb3+掺杂的CaMoO4为主晶相的透明钼酸盐玻璃陶瓷。利用DSC、XRD、SEM确定了该体系玻璃样品的最佳热处理制度：715℃保温2.5 h;随着热处理时间的增加,玻璃陶瓷中的晶粒尺寸逐渐变大;利用UV-Vis-NIR得到样品玻璃陶瓷在可见光区的透过率可达80%;并利用荧光光谱讨论了在相同热处理条件下,不同Tb3+掺杂浓度对玻璃陶瓷样品发光性能的影响,研究表明Tb3+掺杂浓度为7.0mol%时样品的荧光强度最大。     

P2O5‐Fe2O3‐CaO‐SiO2 ferromagnetic glass‐ceramics for hyperthermia

Ferromagnetic glass‐ceramics are an important kind of thermoseed material for hyperthermia treatments. In order to investigate the applications of glass‐ceramics in magnetic hyperthermia, P₂O₅‐Fe₂O₃‐CaO‐SiO₂ (PFCS) glass‐ceramics with different compositions were prepared by the sol‐gel method. The crystal phase, magnetic properties, induction heating ability, and cytotoxicity of the as‐prepared glass‐ceramics were investigated. The results show that all the samples exhibit low cytotoxicity and good induction heating ability. Moreover, it was found that the phosphorus content affected the crystal phase component of the sample, and thus influenced the induction heating ability. Results of the magnetic hyperthermia experiments showed that the PFCS glass‐ceramic samples induced significant cell death of the LoVo cancer cells. The highest cell death rate for sample B2P7 was more than 95%, which suggests good application prospects in the field of hyperthermia therapy.     

Spectroscopic properties of Er/Yb co-doped glass ceramics containing nanocrystalline Bi2ZnB2O7 for broadband near-infrared emission

Er/Yb co-doped transparent glass ceramics containing nanocrystalline Bi₂ZnB₂O₇ were successfully prepared by a high-temperature melting method. X-ray diffraction analysis confirmed the structural properties of the crystal and glass phases of the glass ceramics. Scanning electron microscope images indicated that nanocrystalline Bi₂ZnB₂O₇ with an average size of 30–40 nm was uniformly distributed in the glass matrix. Infrared spectroscopy demonstrated that the glass and glass ceramics had different vibrational peaks. The absorption spectra showed the absorption peaks of the samples, and the main spectral parameters of each absorption peak were calculated using the Judd–Ofelt theory. The emission spectra of the samples showed ultra-wideband fluorescence from 1400 to 1700 nm under excitation at 980 nm, which was enhanced by precipitation of nanocrystalline Bi₂ZnB₂O₇ and the addition of Yb³⁺ ions. Our research showed that Er/Yb co-doped glass ceramics containing nanocrystalline Bi₂ZnB₂O₇ are a promising material for application in near-infrared optical amplifiers.     

添加剂对钢渣微晶玻璃抗弯强度及颜色的影响

介绍了在微晶玻璃中引入添加剂后对其性能以及颜色的影响.实验结果表明:随着ZrO2引入量的增加,抗弯强度先是增大然后又有所下降,ZrO2的最佳引入量为1%.通过引入不同的着色剂可以制得不同颜色的微晶玻璃.     

添加Li_2O的CaO-B_2O_3-SiO_2系微晶玻璃的性能研究

以Li_2O为烧结助剂,采用DTA、XRD、SEM等分析手段研究了添加1.0～2.5 wt%Li_2O对CaO-B_2O_3-SiO_2(CBS)系微晶玻璃性能的影响.结果表明:Li_2O降低了CBS系微晶玻璃的玻璃转变温度和析晶温度.未添加Li_2O的试样在930 ℃烧结,而添加Li_2O的试样可以在820 ℃以下烧结,Li_2O显著降低了试样的烧结温度.当Li_2O添加量为1.0wt%时,试样可以在760～820 ℃范围内烧结,800 ℃烧结试样介电常数为5.71,介电损耗为0.0024(测试频率为10 MHz).     

Bioactivity of Fe2O3-CaO-SiO2 glass ceramics modified through the addition of P2O5 and TiO2

The bioactivity of ferromagnetic glass ceramics is one key factor affecting the success of hyperthermia treatments. In order to investigate the effect of the addition of a nucleating agent on the bioactivity of the resulting glass ceramics, two different nucleating agents were used for the fabrication of Fe₂O₃-CaO-SiO₂ glass ceramics, and their short-term and long-term effects on the cytotoxicity of human fetal normal colonic mucosa cells were evaluated. The results show that P₂O₅ promotes the formation of an apatite-like phase on the surface of Fe₂O₃-CaO-SiO₂ glass ceramics immersed in simulated body fluid. While TiO₂ had some adverse effect on the cell viability, P₂O₅ had little effect on the cell viability over a certain concentration range. In this paper, the prepared Fe₂O₃-CaO-SiO₂ glass ceramics with P₂O₅ added as nucleating agent are demonstrated to exhibit a good bioactivity and low cytotoxicity, which suggests good application prospects in the field of hyperthermia.