Silicon nitride can also be applied to solar cells. After the silicon nitride film is plated by PECVD, not only can it be used as an anti-reflection film to reduce the reflection of incident light, but also, in the deposition process of the silicon nitride film, hydrogen atoms of the reaction product enter the silicon nitride film and the silicon wafer. It acts as a passivation defect. Here, the silicon nitride nitrogen atomic number ratio is not strictly 4:3, but varies within a certain range depending on the process conditions, and the physical properties of the film corresponding to different atomic ratios are different. Silicon Nitride Ceramic Disc,Black Silicon Nitride Ceramic Disc,Ceramic Structure Disc,Plate Silicon Nitride Disc Dongguan Haikun New Material Co., Ltd. , https://www.hkceram.com
For ultra-high temperature gas turbines, aircraft engines, electric furnaces, etc.
Overnight, the trend of aluminum was flat. In the intraday repression of the strong US dollar, aluminum prices reached $1,727. After reluctantly driven by the disappearance of selling, aluminum prices returned to the $1,740 line. However, the market does not expect aluminum prices to be fundamental. Supportive background, the current price range is difficult to maintain, today LME inventory does not appear in the expected continuous increase in inventory, aluminum prices can be slightly adjusted. Technically, the support level of $ 1,720 is effective, but in the further fundamental changes Under the impetus, aluminum prices may effectively break through the support of $1,700. Shanghai's spot aluminum prices are strong. Under the combined effect of reluctant sellers of aluminum plants and favorable spending in Shanghai, aluminum prices are bullish in the future. Aluminum is expected to fall under the previous period. Form the pattern of long-term discount, look forward to the current spot strength, to establish confidence in speculative funds, to make up for nearly 100 yuan in premium status. (Li Ling)