• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Materials Research >Compositional tailored sol-gel SiO_2-TiO_2 thin films: Crystallization, chemical bonding configuration, and optical properties
【24h】

Compositional tailored sol-gel SiO_2-TiO_2 thin films: Crystallization, chemical bonding configuration, and optical properties

机译：量身定制的溶胶凝胶SiO_2-TiO_2薄膜：结晶，化学键合结构和光学性质

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Thin films of SiO_2-TiO_2 composite oxides with various SiO_2:TiO_2 compositions were prepared by the sol-gel method, using tetraethylorthosilicate (TEOS) and titanium tetraisopropoxide (TTIP) as precursors. The composition, crystal structure, and chemical bonding configuration of the as-deposited and annealed SiO_2-TiO_2 thin films were analyzed using Rutherford backscattering spectrometry (RBS), glancing incident angle x-ray diffraction (GIAXRD) and Fourier transform infrared spectroscopy (FTIR), respectively. Optical properties of the films were characterized by spectroscopic ellipsometry and ultraviolet-visible spectropho tome try. The Si/Ti ratios in the SiO_2-TiO_2 films agree with the TEOS/TTIP molar ratio in the sol-gel precursor. When the TEOS/(TEOS + TTIP) ratio is greater than 40 percent, the SiO_2-TiO_2 thin films remain amorphous (without formation of TiO_2 crystalline phase) after annealing at temperatures as high as 700 deg C. FTIR spectra indicate that the quantity of Si-O-Ti bonding can be maximized when the TEOS:TTIP in the precursor is 80 percent : 20 percent. The refractive index of the SiO_2-TiO_2 films ncreases approximately linearly to the mixing ratio of TTIP/(TEOS + TTIP). However, SiO_2-rich films possess higher ultraviolet-visible transmittance than the TiO_2-rich films. The modification of microstructure and chemical bonding configuration in the SiO_2-TiO_2 films by the composition and its influence on the optical properties are discussed.
机译：以原硅酸四乙酯（TEOS）和四异丙氧基钛（TTIP）为前驱体，通过溶胶-凝胶法制备了具有多种SiO_2：TiO_2组成的SiO_2-TiO_2复合氧化物薄膜。使用卢瑟福背散射光谱（RBS），掠射入射角X射线衍射（GIAXRD）和傅里叶变换红外光谱（FTIR）分析了沉积和退火后的SiO_2-TiO_2薄膜的组成，晶体结构和化学键构型， 分别。膜的光学性质通过光谱椭圆偏振和紫外可见分光光度法表征。 SiO_2-TiO_2薄膜中的Si / Ti比与溶胶-凝胶前体中的TEOS / TTIP摩尔比一致。当TEOS /（TEOS + TTIP）的比率大于40％时，SiO_2-TiO_2薄膜在高达700摄氏度的温度下退火后仍保持非晶态（不形成TiO_2晶相）。FTIR光谱表明当前体中的TEOS：TTIP为80％：20％时，Si-O-Ti键可以最大化。 SiO_2-TiO_2薄膜的折射率随TTIP /（TEOS + TTIP）的混合比线性增加。然而，富含SiO 2的膜比富含TiO 2的膜具有更高的紫外-可见光透射率。讨论了SiO_2-TiO_2薄膜的微结构和化学键合构型的改变及其对光学性能的影响。

著录项

  • 来源
    《Journal of Materials Research》 |2005年第11期|p.3141-3149|共9页
  • 作者

    Li-Lan Yang; Yi-Sheng Lai; J.S. Chen;

  • 作者单位

    Department of Materials Science and Engineering, National Cheng Rung University, Tainan, Taiwan, People's Republic of China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 工程材料学;
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号