耐碱SiO_2－TiO_2－RO玻璃中的逆性现象

本文研究了耐碱４０ＳｉＯ２·３０ＴｉＯ２·３０ＲＯ（ＢａＯ，ＳｒＯ，ＣａＯ）玻璃在耐碱性和结构两方面的逆性现象。即在桥氧数小于３的玻璃中，随着ＲＯ的种类增多，玻璃结构变得致密，耐碱性能得到改善。通过玻璃摩尔体积计算，玻璃致密化过程得到进一步且更精确的证实（逆性现象符合离子半径规律）。玻璃的耐碱性通过粉末失重法和分光光度法测定，玻璃结构通过红外光谱进行研究。上述现象可用以改善玻璃的耐碱性能。     

Na2O.CaO.2P2O5玻璃水解性研究

在３７℃，ｐＨ＝６的模拟体液中对Ｎａ２Ｏ．ＣａＯ．２Ｐ２Ｏ５玻璃水解性进行了探讨。借助红外光谱，研究了玻璃结构与水解性关系。分析了玻璃水解后的结构变化。     

GeO_2－SiO_2－TiO_2－K_2O系统玻璃反常色散区的探索研究

本文利用红外分光光度仪，测定了ＧｅＯ２－ＳｉＯ２－ＴｉＯ２－Ｋ２Ｏ系统在４０００～２５０ｃｍ（－１）波数范围的反射比（Ｒ）。通过Ｋ－Ｋ关系式、数学处理和计算机运算、求出消光系数和红外折射率的方法，研究了本系统玻璃的反常色散规律。对结果进行了理论上的分析。发现本系统玻璃在１０００～４００ｃｍ（－１）波数区域内存在折射率（ｎ）小子１的现象，可用于研制传输ＣＯ２激光（９４０ｃｍ（－１））的空芯光纤材料。     

K_2O－B_2O_3－SiO_2系统玻璃结构的光谱研究

本文应用红外光谱和喇曼光谱分析技术，研究了Ｋ２Ｏ－Ｂ２Ｏ３－ＳｉＯ２系统玻璃的结构．结果表明，在ＳｉＯ２／Ｂ２Ｏ３＞２的情况下，无论Ｋ２Ｏ／Ｂ２Ｏ３＞１、≈１、还是＜１，玻璃结构中均存在［ＢＯ３］，Ｓｉ－Ｏ－－Ｏ－Ｓｉ－Ｏ－及各种硼酸盐基团，在实验组成范围内，玻璃结构以硅氧网络为主，硅氧网络和硼氧网络上均带有非桥氧，并且对这种结构特征产生的原因进行了分析．另外，实验结果还说明ＳｉＯ２／Ｂ２Ｏ３和Ｋ２Ｏ／Ｂ２Ｏ３是影响网络结构的主要原因．     

烧结法生产CaO—Al2O3—SiO2—R2O—ZnO红色微晶玻璃板

以ＣａＯ－Ａｌ２Ｏ３－ＳｉＯ２－Ｒ２Ｏ－ＺｎＯ系统为基础玻璃成分，利用高岭土尾矿为主要原料，采用硒粉及镉红为着色剂用，烧结法生产出颜色艳丽的枣红色微晶玻璃装饰板。并研究和讨论了影响其生产的因素。     

烧结法生产 CaO-Al_2O_3-SiO_2-R_2O-ZnO 红色微晶玻璃板

以ＣａＯ－Ａｌ２Ｏ３－ＳｉＯ２－Ｒ２Ｏ－ＺｎＯ系统为基础玻璃成分，利用高岭土尾矿为主要原料，采用硒粉及镉红为着色剂用，烧结法生产出颜色艳丽的枣红色微晶玻璃装饰板。并研究和讨论了影响其生产的因素。     

B2O3对磷酸盐生物玻璃水解性的影响

采用化学分析、热膨胀测试及红外光谱分析,研究了适量引入Ｂ２Ｏ３对磷酸盐玻璃水解性的影响,并从组成、结构－性质的关系上进行了分析。结果表明,Ｂ２Ｏ３的适量引入,使玻璃水解率和热膨胀系数都出现反常现象。Ｂ２Ｏ３主要以［ＢＯ４］四面体进入以［ＰＯ４］四面体为主体的偏磷酸盐玻璃网结构中,使玻璃既具有一定的生物活性,又具有一定的化学稳定性。     

Fe_2O_3－MnO－Li_2O－SiO_2系统凝胶－玻璃的转变研究

用溶胶－凝胶方法制备了Ｆｅ２Ｏ３－ＭｎＯ－ＬｉＯ２－ＳｉＯ２系统凝胶。用Ｘ射线衍射，ＤＴＡ－ＴＧ分析和红外光谱分析研究了从凝胶到玻璃的结构转变。研究表明，随热处理温度升高凝胶从典型的水解聚合产物向具有连续网络的玻璃转变，５００℃开始析晶，析出的晶型依赖于组分和温度，据此讨论了凝胶晶化过程的特性。     

R2O—BaO—TiO2—SiO2系统高折射低密度玻璃若干性能的探讨

研究了影响Ｒ２Ｏ－ＢａＯ－ＴｉＯ２－ＳｉＯ２系高折射低密度玻璃的理化性能，特别是透光曲线的有关规律。分析了含钛玻璃易带色的调的原因。并提出了减少着色的途径。     

添加物对CaO—Al2O3—SiO2系统玻璃析晶性能的影响

借助ＩＲ,ＤＴＡ,ＸＲＤ及ＯＭ分析手段,研究了ＺｎＯ,Ｎａ２Ｏ对ＣａＯ－Ａｌ２Ｏ３－ＳｉＯ２系统玻璃析晶性能的影响。结果表明,随（Ｎａ２Ｏ＋ＺｎＯ）／（Ａｌ２Ｏ３＋ＳｉＯ２）的量比增大,玻璃结构由致密转向疏松,且不均匀性增加,析晶活化能下降。     

STUDY ON THE HYDROLIZATION OF THE Na_2O-CaO-P_2O_5-SiO_2 BIOLOGICAL GLASSES

The bio-glass in the Na_2O-Ca_2O-P_2O_5-SiO_2 system involved in this paper is highly bio-active.The hydrolization of this glass with calcium phosphateand low silica is studied.The structure-compositicon-property relation of the glass is discussed by means ofIR spectrum,DTA and SEM.This study shows that:(a)the structure of the glass is mainly chain-like orlayer-like;(b)the glass is separated into a calciumphosphate-rich phase and a silica-rich phase;(c)thechain-or layer-like structure and the separation hareadvantages with hydrolization.     

B_2O_3对磷酸盐生物玻璃水解性的影响

采用化学分析、热膨胀测试及红外光谱分析．研究了适量引入B2O3对磷酸盐玻璃水解性的影响．并从组成-结构-性质的关系上进行了分析．结果表明,B2O3的适量引入．使玻璃水解率和热膨胀系数都出现反常现象．B2O3主要以[BO4]四面体进入以[PO4]四面体为主体的偏磷酸盐玻璃网络结构中,使玻璃既具有一定的生物活性,又具有一定的化学稳定性。     

含锆逆性玻璃及 TiO_2、PbO、SiO_2 的耐碱性以及氧化物耐碱性的评估

利用粉末失重法、分光光度法及原子吸收光谱法研究了含锆逆性玻璃及ＴｉＯ２、ＰｂＯ、ＳｉＯ２的耐碱性。在对比现存玻璃、氧化物耐碱性表示方法的基础上，研究得出了比较合理的评价氧化物耐碱性的指标。     

含锆耐碱玻璃中 SiO_2、ZrO_2 碱蚀动力学的研究

用分光光度法测定了耐碱玻璃中ＳｉＯ２、ＺｒＯ２转入碱侵蚀液的量，在此基础上，系统地研究了该玻璃中ＳｉＯ２、ＺｒＯ２的表观活化能Ｅａ和频率因子实验值Ｋ０对速率常数的影响，并讨论了影响碱蚀过程的动力学因素。实验表明：评价氧化物自身的耐碱性，不能仅根据Ｅａ值，还应考虑Ｋ０的大小。     

Influence of TiO_2 on the Alkali Resistance and Structure of Invert Glass

1　IntroductionTheinvertglassisakindofglasswhosenumberofbridgeoxygenyisnotbiggerthan 3.WhenthereisonlyoneglassformerSiO2 ,itsmolarcontentisnomorethan66 .7% .Onthisoccasion ,theglassstructuremaychangefromthree dimensionalconsecutivenetworktolaminarnetwork (y =3) ,chainstructure (y =2 ) ,andislandstructure (y =0 ) [1].TheinfluenceofTiO2 onthealkaliresistanceandstructureintheinvertglasshasnotbeenreported .Thispaperwilldiscussitindetail.2　ExperimentalThematerialsusedwerechemicalpureSiO2 ,TiO…     

Influence of TiO<Subscript>2</Subscript> on the alkali resistance and structure of invert glass

Through measuring the alkali resistance of the invert glass and the quanity of SiO₂ and TiO₂ migrating fron the glass into the solution, the influence of TiO₂ on the alkali resistance of the glass is discussed and its structure is also analyzed by infrared spectroscopy. It is concluded that TiO₂ has double functions for the alkali resistance of the invert glass. On the one hand, both TiO₂ polarizing the secondary ions in glass and TiO₂ isomorphism replacement of SiO₂ make the alkali resitance of the glass decrease. On the ther hand, TiO₂ patching network and anti-erosion covering help to increase the alkali resistance. ZHAO Qing-lin: Born in 1972 Funded by the National Natural Science Foundation of China(No. 59372081)     

Preparation and Performance of Magneto-optical Glasses Doped with Tb3＋/Dy3＋

In order to increase the content of rare-earth oxides in magneto-optical glass and improve the Verdet constant, the rare-earth doped ternary Ga2O3-B2O3-SiO2(GBS) system magneto-optical glasses were prepared by the melt quenching technique. The infl uence of Tb3+ and Dy3+ ions on the structure of GBS glasses was investigated using FTIR, DSC and Faraday rotations. The experimental results showed that the content of rare-earth oxides in the glasses with the double incorporation of Tb2O3 and Dy2O3 was higher. The crystallization parameter β achieved the maximum 0.48 with Tb3+/Dy3+ content of 35mol%. Terbium oxide existed mainly in [TbO3] units in the glasses and [TbO4] units were converted into [TbO3] with increasing Tb2O3 content. As Ga3+ ion is larger than B3+ ion in radius, leading to an increasing of the glass network gap and improvement in the ability of accommodating rare earth ions, Verdet constant increased.     

Structure of Bi2O3-ZnO-B2O3 system low-melting sealing glass

Bi_2O_3-ZnO-B_2O_3 system glass is a kind of lead-free low melting sealing glasses. The structure of Bi_2O_3-ZnO-B_2O_3 system low-melting sealing glass was investigated by DSC, FT-IR, XRD and SEM. The results show that with the increase of B_2O_3 content, the transition temperature Tg and softening temperature T_f of Bi_2O_3-ZnO-B_2O_3 system low-melting sealing glasses increase, which leads to the liquid phase precipitation temperature increasing and promotes the structure stability in the glass. With increasing the heat treatment temperature, a large number of liquid phases appear in samples and the sinter efficiency of the samples increases. The FT-IR spectra of the glasses show the presence of some bands that are assigned to vibrations of Bi-O bond from [BO_3] pyramidal and [BiO_6] octahedral units and B-O from [BO_3] and [BO_4] units. With the decrease of B_2O_3 content, the crystallization tendency of the glass increases. In glass samples B_1 and B_2, crystallization starts at 460 ℃ and 540 ℃, respectively. Both of them precipitate Bi-(24)B_2O_(39) phases.     

ZnO-Sb2O3-P2O5系统玻璃的制备与性能

用熔体冷却方法制备了xSb2O3-(70-x)P2O5-30ZnO(x=0~40mol)和xSb2O3-(65-x)ZnO-35P2O5(x=0~40mol)系统无铅易熔玻璃,研究了ZnO-Sb2O3-P2O系统玻璃的形成区。采用热膨胀仪和红外光谱仪等对ZnO-Sb2O3-P2O5系统玻璃的结构及性能进行了研究和分析。结果表明,在ZnOSb2O3-P2O5系统玻璃中,Sb2O3参与网络结构。随着Sb2O3含量的增加,玻璃的软化点降低,密度和化学稳定性增加。在Sb2O3摩尔分数为35%左右时,系统玻璃的结构和性能比较优异。