Effects of Substrate Temperatures on the Structure and UV-shielding Properties of TiO_2-CeO_2 Films Deposited on Glass by Radio-frequency Magnetron Sputtering

1Introduction Theultravioletrays(UV)insunlight(-4%)cantransmitintoroomthroughcommonfloatglass,theUVcanmakethematerialsintheroom,eg,paper,furni ture,textilefabricandplastics,becoloredanddeterio rated.ShieldingfromUVirradiationisofinterestinmanyfields.Formu…     

校园网认证802.1X

大部分高校采用的是802.1X认证上网,借助电信的拨号器会有诸多限制,本文通过系统自身配置802.1X认证,轻松实现上网。国内大部分高校均采用IEEE 802.1X认证方式对校内宽带接入进行认证,我所在的高校亦不例外。在学校的中国电信开网以后会得到一个802.1X拨号器软件。安装这     

溅射气氛中O2／Ar比及热处理对直流反应磁控溅射法制备玻璃基TiO2薄膜结构与亲水性的影响

在工作气压为0．80Pa的氧氩气混合气氛下，改变氧与氩的流量比(O2／Ar：0．10，0．20，0．30)，在预先镀10nm左右SiO2的普通玻璃基片上用直流(D．C．)磁控溅射法制备了300nm左右的TiO2薄膜试样。离线在500℃、氧气氛下对试样热处理2h。用X射线光电子能谱(XPS)和X射线衍射仪(XRD)分别研究了试样热处理前后的表面元素组成、离子状态和物相组成，用接触角分析仪测试了试样在紫外光(UV)照射后的水润湿角。     

射频磁控溅射法在玻璃上制备紫外吸收和透明导电双功能薄膜

制备了SnO2:Sb(6%,摩尔分数)靶材和一系列不同摩尔比的CeO2-TiO2靶材;以所制靶材用射频磁控溅射法在普通玻璃基片上沉积了CeO2-TiO2单层和CeO2-TiO2/SnO2:Sb双层薄膜.用紫外-可见光谱、Raman光谱、X射线光电子能谱和X射线衍射对CeO2-TiO2薄膜进行了表征.结果表明:在CeO2/TiO2摩尔比为0.5:0.5和0.6:0.4时沉积得到的CeO2-TiO2薄膜为非晶态结构,并具有高的紫外吸收(平均值＞99%)和高的可见光透过率(平均值＞80%).在CeO2-TiO2薄膜表面存在Ce4 ,Ce3 和Ti4 .对CeO2-TiO2/SnO2:Sb双层薄膜,除具有高的紫外吸收(平均值＞99%)和可见光透过率(平均值＞75%)性能外,还具有导电性,方块电阻在80～90 Ω/口之间,电阻率在(3.2～3.6)×10-3Ω·cm之间.该双层镀膜玻璃具有截止紫外线和透明导电双功能.     

镀SiO2膜玻璃基片上化学气相沉积法制备SnO2:Sb薄膜

采用化学气相沉积法在镀有SiO2膜的钠钙硅玻璃基片上制备了Sb掺杂SnO2(antimony-doped tin oxide,ATO)薄膜.研究了基板温度、基板输送速度和氮气流量对ATO薄膜结构和性能的影响.用X射线衍射仪、扫描电镜、X射线光电子能谱仪、紫外-可见光谱仪、双光束红外分光光度计对薄膜的结构、形貌和成分进行了表征.结果表明:沉积温度为490 ℃以上时,薄膜主要以四方相金红石结构存在.随着基板输送速度的提高,薄膜择优取向由(110)转变为(200).薄膜中掺杂的Sb以Sb5 的形式存在;当基板温度为530 ℃时,薄膜表面的C没有完全燃尽,以C-O形式存在于薄膜中.薄膜的可见光透过率随基板温度的升高而增大.具有(110)择优取向的薄膜的红外反射性能较好.     

氧气分压对磁控溅射法制备ZAO膜的影响

利用直流磁控溅射技术在无机玻璃衬底上制备了ZAO透明导电薄膜。研究了溅射过程中氧气分压对ZAO薄膜的结构和光电特性的影响，结果表明：当氧气分压为0Pa时，薄膜结晶度良好，具有最小电阻率和较高的可见光透过率。     

溶胶-凝胶法制备TiO2纳米薄膜的晶粒长大机理研究

通过sol-gel法在普通钠钙玻璃表面制备了均匀透明的锐钛矿型TiO2纳米薄膜.用透射电镜(TEM)、X射线衍射(XRD)和紫外可见吸收光谱(UV-VIS)等对薄膜的晶粒大小和透光率进行了表征.结果表明:随着镀膜次数和热处理时间的增加,薄膜中的平均晶粒大小接近线性增加.仅增加TiO2薄膜的热处理时间,薄膜中晶粒长大不明显,其吸收阀值未发生明显的红移.因此, 薄膜中晶粒长大的机理可能是: 上一次镀的TiO2晶粒成了下一次镀TiO2溶胶的晶核, 并在此基础上逐渐长大.     

釉面砖表面掺铅TiO2涂层的溶胶——凝胶法制备及其光催化性能

用溶胶－凝胶法在釉面砖上制备了均匀的ＴｉＯ２及掺铅ＴｉＯ２涂层，讨论了影响涂层质量的某些因素，用Ｘ射线光电子能谱仪（ＸＰＳ）研究了釉面涂层的化学组成。在紫外线及日光照射下，ＴｉＯ２涂层奥面砖可以对有机磷农药光催化降解。掺铅ＴｉＯ２涂层釉面砖的光催化降解率明显高于未掺铅的ＴｉＯ２涂层釉面砖的光催化降解率。该类材料可望在环境保护、污水处理等方面有广阔的应用前景。     

Ultraviolet-shielding and conductive double functional films coated on glass substrates by sol-gel process

Ultraviolet-shielding and conductive double functional films were composed of CeO2-TiO2 film and SnO2:Sb film deposited on glass substrates using sol-gel process.Ce(NO3)3·6H2O and Ti(C4H9O4),SnCl4 and SbCl3 were used as precursors of the two different functional films respectively.The CeO2-TiO2 films were deposited on glass substrates by sol-gel dip coating method,and then the SnO2:Sb films with different thickness were deposited on the pre-coated CeO2-TiO2 thin film glass substrates,finally,the substrates coated with double functional films were annealed at different temperatures.The optical and electrical properties of the CeO2-TiO2 films and the double films were measured by UV-Vis spectrometer and four probe resistance measuring instrument.The crystal structures and surface morphology of the films were characterized using XRD and optical microscope,respectively.The obtained results show that the ultraviolet-shielding rate of the glass substrates with CeO2-TiO2 films is not less than 90%,and transmittance in visible lights can reach 65%.With the thickness of the SnO2:Sb film increasing,its conductivity became better,and the surface resistance is about 260 Ω/ when the SnO2:Sb films were deposited 11 cycles of the dip on the pre-coated CeO2-TiO2 glass.The ultraviolet-shielding rate of the glass substrates with double functional films is higher than 97%,and the peak transmittance in the visible lights is 72%.Additionally,with increasing the heat treatment time,the Na+ of the glass substrates diffuses into the films,resulting in the particle size of SnO2 crystal smaller.