کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5367118 | 1388361 | 2007 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Strengthening sapphire at elevated temperatures by SiO2 films Strengthening sapphire at elevated temperatures by SiO2 films](/preview/png/5367118.png)
SiO2 films have been prepared on sapphire by radio frequency magnetron reactive sputtering in order to increase the optical and mechanical properties of infrared windows and domes of sapphire at elevated temperatures. Infrared transmission and flexural strength of uncoated and coated sapphires have been investigated at different temperatures. SiO2 films were shown to have apparent antireflective effect on sapphire substrate at room temperature. With increasing temperature, the coated sapphires have larger average transmission than the uncoated ones. The temperature was proven to only weakly affect the absorption coefficient and antireflection capability of the deposited films. It is also indicated that the flexural strengths of the c-axis sapphire samples coated with SiO2 films are increased by 1.2 and 1.5 times than those of uncoated at 600 and 800 °C, respectively.
Journal: Applied Surface Science - Volume 253, Issue 12, 15 April 2007, Pages 5363-5367