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)     

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。     

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。     

太阳能电池银浆中玻璃粉的性能研究

通过研究玻璃粉的几个重要控制指标如析晶、玻璃化温度,确定了玻璃粉的最佳配比．以总质量为20g的玻璃粉计算,m（Ph0）控制在16．634～17．188g,m（Pb0）：m（SiO2）=7．56-9．55．试验表明,Al2O3可增加玻璃粉的化学稳定性、韧性;ZrO2能显著提高玻璃的耐碱性;P2O5是典型的网络形成剂之一．经试验,由银粉最佳性能参数决定的玻璃粉配比量制备的玻璃粉不析晶,且在形成玻璃粉的前提下使玻璃化温度控制在最佳温度区380～400℃,满足银浆的使用要托     

纳米TiO2-SiO2自清洁复合薄膜制备及其光催化机理

采用溶胶-凝胶法在普通载玻片上制备TiO2-SiO2复合薄膜,研究SiO2添加量对光催化活性的影响,探讨TiO2光催化的机理．结果表明：光催化性随SiO2含量的增加而增加。但SiO2添加量过大,煅烧过程中对TiO2锐钛矿相晶粒生长有抑制作用,而且光催化活性有所下降．当SiO2添加量为30％时,在紫外光照1h时TiO2-SiO2薄膜的光催化活性最佳．     

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。     

TiO_2薄膜的亲水性及光催化自清洁效果

以溶胶-凝胶法为基础,在普通玻璃表面制备了具有纳米尺寸气孔、纳米及微米尺寸复合气孔结构的TiO2薄膜或TiO2/SiO2复合薄膜,并考察了它们的亲水性能及表面经空气中灰尘污染后,其超亲水性能在紫外光照射下的恢复能力。所有纯TiO2薄膜于制备后测试的表面水接触角均达到0°。SiO2的掺杂量较小（10%）时,SiO2的掺入增大了薄膜的水接触角,但随着SiO2掺杂量的增大,接触角减小,可达到超亲水效果。表面污染的薄膜经紫外光照射后,其超亲水性的光致恢复能力基本不受前驱体溶胶的陈化时间、SiO2掺杂浓度、表面形态的影响,但与薄膜的光催化活性有关。4层以上的薄膜或带有SiO2中间隔离层的薄膜由于可以抑制玻璃基底中Na＋扩散至薄膜表面,光催化降解灰尘污染物的能力较高,紫外光照射后均能恢复其超亲水性能。     

Preparation of TiO_2 Thin Film and Its Antibacterial Activity

1　IntroductionInrecentyears ,theuseofinorganicantimicrobialagentshasattractedinterestforthecontrolofmicrobes[1-3 ] .Thekeyadvantagesofinorganicantimicro bialagentsareimprovedsafetyandstability ,ascomparedwithorganicantimicrobialagents .Atpresent,mostanti…     

溶胶-凝胶法制备高透光SiO2/ATO-SiO2双层疏尘薄膜

为了避免灰尘在户外玻璃上的粘附导致透过率下降的现象,采用溶胶一凝胶法在石英玻璃上制备高透光SiO2/ATO-SiO2双层疏尘薄膜,研究SiO2基层薄膜对薄膜组织和性能的影响;利用原子力显微镜、紫外-可见-近红外分光光度计、霍尔效应测量仪、自制落灰实验装置对薄膜的三维表面形貌进行表征,并对其光电性能、疏尘性能进行了测试....     

The Effect of SiO_2 Additive on Super-hydrophilic Property of TiO_2-SiO_2 Thin Film by Sol-gel Method

TiO2-SiO2 thin films have been prepared on slide glass substrates by sol-gel method, and the effect of SiO2 additive on photo-generated hydrophilicity of TiO2 thin film was investigated by measuring the contact angle of water, the microstructure, the transmittance, the photocatalytic activity and the specific surface area . The results showed that 10mol% of SiO2 additive was the most effective for decreasing contact angle of water. The SiO2 additive of less than 30mol% has a suppressive effect on the crystal growth of anatase in calcinations, resulting in a large surface area. Consequently, the super-hydrophilicity was improved.     

The Effect of SiO2 Additive on Super-hydrophilic Property of TiO2-SiO2

TiO2-SiO2 thin films have been prepared on slide glass substratesby sol-gel method, and the effect of SiO2 additive on photo-generated hydrophilicity of TiO2 thin film was investigated by measuring the contact angle of water, the microstructure, the transmittance, the photocatalytic activity and the specific surface area. The results showed that 10mol% of SiO2 additive was the most effective for decreasing contact angle of water. The SiO2 additive of less than 30mol% has a suppressive effect on the crystal growth of anatase in calcinations, resulting in a large surface area. Consequently, the super-hydrophilicity was improved.     

CaO-Al_2O_3-SiO_2系统微晶玻璃晶化行为的研究

以CaO Al2 O3 SiO2 系统为基础玻璃 ,以粉煤灰为主要原料制得以透辉石 (CaO·MgO·2SiO2 )和钙黄长石 (2CaO·Al2 O3 ·SiO2 )、霞石 (NaAlSiO4 )为主晶相的微晶玻璃。用DTA、XRD和SEM等现代测试方法 ,研究了Fe2 O3 ,TiO2 ,Cr2 O3 对粉煤灰玻璃的晶化行为的影响。结果表明 :Fe2 O3 有利于形成尖晶石型MgFe2 O4 晶核剂 ,从而促进玻璃的微晶化。Cr2 O3 、TiO2 均是有效的晶核剂     

The Mixed-Alkali Effect on The Resistance of Glass to Water

Based on the composition of float glass, the resistance of glass to water, in which a small amount of K2O (0-1.0 wt% ) was substituted for equivalent amount of Na2O, was investigated by means of glass grains testing. The components extracted from the glass and total alkalinities in extraction solution were determined by atomic absorption spectroscopy and neutralizing method, respectively. The composition of the glass was 14.4 K2O Na2O, 4.0MgO, 8.2CaO, 1.4Al2 O3, 72.0 SiO2, and the minimum extraction ratio of oxides (maximum durability) occurred at a K2 O/Na2O ratio of 0.051( by weight) due to the presence of the mixed-alkali effect. The relative extraction ratio of alkali oxides (R2O) was greater than that of alkaline earth oxides (RO) . By means of mixed-alkali effect and lowing relative contents of R2O in the glass, the resistance of float glass to water was improved and its mildew-proof ability was therefore increased.     

TiO_2/ZnO超细粉体对PET纤维抗紫外性能及力学性能的影响

采用硅改性法对TiO2/ZnO复合粉体进行表面改性。通过在聚酯中添加改性TiO2/ZnO复合粉体形成共混体系,对TiO2/ZnO复合粉体的抗紫外性及其与聚酯共混纺丝后改性涤纶纤维的力学性能进行了研究。研究表明,经过表面改性后的改性剂最佳质量分数为0.1%,TiO2和ZnO粉体的添加量为1∶1时抗紫外线的效果最好,且粉体添加量越大,纤维的力学性能下降越多。     

CeO_2对PbO－ZnO－B_2O_3－SiO_2－TiO_2系统玻璃析晶性能

利用差热分析、Ｘ射线衍射、扫描电镜等实验手段研究了ＣｅＯ２对添有ＴｉＯ２的玻璃组成ＰｂＯ７５．０、ＺｎＯ、５．０、Ｂ２Ｏ１２．５、ＳｉＯ２７．５（ｗ％）的析晶性能的影响。结果表明ＣｅＯ２在该组成玻璃中不能作晶核剂使用，但它能影响玻璃的析晶温度和促进玻璃的析晶．     

TiO_2和Cr_2O_3复合晶核剂对微晶玻璃晶化行为的影响

通过差热分析、X射线衍射分析、偏光显微镜和扫描电镜观察等测试方法 ,研究了TiO2 和Cr2 O3作晶核剂对金属尾矿微晶玻璃晶化行为的影响 .研究表明 :Cr2 O3 和TiO2 复合晶核剂能有效地促进CaO -MgO -Al2 O3-SiO2 系统玻璃在较低温度下即开始晶化 ,且形成以透辉石为主晶相的微晶玻璃 ,晶核剂质量浓度不同对玻璃析晶的影响不同 .     

Effect of nucleating agents on microstructure and mechanical properties of SiO2-Al2O3-ZrO2 glass-ceramics

SiO2-Al2O3-ZrO2 glasses with different nucleating agents were crystallized under special processing schedule. The microstructure and mechanical properties of the glass-ceramics in SiO2-Al2O3-ZrO2 system were investigated by differential scanning calorimetry, scanning electron microscopy, X-ray diffraction and three-point bending method. The results show that ZrO2 is not an effective nucleating agent in SiO2-Al2O3-ZrO2 system, while TiO2 is effective for the separation of spinel, and P2O5 facilitates solubility of ZrO2 in glass and crystallization. The main crystalline phases of the glass-ceramics are spinel, anorthite and tetragonal zirconia. With the increase of ZrO2 content in the glass, glass-ceramics show higher bending strength （120 MPa） than others.     

金红石型TiO2/锐钛矿型TiO2/SiO2三元复合薄膜的合成

采用水热法,以钛酸正丁醑为初始原料,在FTO基底上沉积了金红石型TiO2纳米棒阵列,然后利用锐钛矿型TiO2纳米粒子及无定形SiO2对纳米棒进行了表面修饰,获得金红石型TiO2/锐钛矿型TiO2/SiO2三元复合薄膜.扫描电镜及X射线衍射分析结果表明,在FTO表面上沉积的TiO2为金红石型单晶纳米棒,其尺寸随反应时间的增加而增大.电化学测试结果表明,随着纳米棒尺寸的增大,相应复合薄膜的电化学反应电荷转移阻力增大.2种TiO2晶型混合引起的电子-空穴分离效应及混合的均匀程度直接影响到复合薄膜的光催化活性.水热反应7h得到的纳米棒阵列相应的复合薄膜显示了较好的电化学性能及光催化活性.     

Preparation and photocatalytic activity of Cu^2＋-doped TiO2/SiO2

Cu2+-doped nanostructured TiO2-coated SiO2. (TiO2./SiO2) particles were prepared by the layer-by-layer assembly technique and their photocatalytic property was studied. TiO2 colloids were synthesized by the sol-gel method using TiOSO4 as a precursor. The experimental results showed that TiO2 nanopowders on the surface of SiO2 particles were well distributed and compact. The amount of TiO2 increased with the increase in coating layers. The shell structure appeared to be composed of anatase titania nanocrystals at 550℃. The 2-layer coated TiO2 particles on the surface showed a higher degradation rate compared with all the dif-ferent-layer samples. The photocatalytic activity of Cu2+-doped TiO2/SiO2 was higher than that of undoped TiO2/SiO2. The optimum dopant content was about 0.10wt%.     

SnO_2对浮法玻璃耐水性的影响

本文在洛阳浮法玻璃组成中添加一定比例的ＳｎＯ２取代相同质量的ＳｉＯ２，用粉末法测定各试样的耐水性。结果表明，在玻璃组成中添加２％左右的ＳｎＯ２时，玻璃的耐水性有明显提高，为浮法玻璃的防霉提供了一条可能的途径。