Control of by-products in the reduction reaction process
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As the title suggests, how can control be exercised during the reduction reaction to reduce the by-product SiCL4?
1. Control the feeding ratio. 2. Control the temperature well. 3. Control the pressure well.
This is a great topic: what kind of controls can reasonably and effectively increase the conversion rate while reducing the amount of by-products generated.
Reply to 2# luoye888: Could the senior please explain in more detail?
Reply to 4# chengerqing2272: The ratio of TCS to hydrogen as well as the flow rate are important factors. The flow rate affects the quality of the silicon rods, such as their density; pressure influences the gas field, while temperature affects the temperature field. Too high a temperature can cause the rods to collapse, whereas too low a temperature impacts the reaction rate.
Reply to 5# luoye888: Yeah, thanks a lot
I can’t say this here out of self-respect
I can’t say it here; it’s also a matter of professional ethics. Besides, each factory is different.
There are eunuchs upstairs. . . Is that really the case? Besides, just because you say it doesn’t mean it’s necessarily true! ! !
If silicon tetrachloride can really be controlled well, then what’s the need for thermal hydrogenation and cold hydrogenation?
The large amount of by-product SiCl4 is still generated during the thermal decomposition reaction; appropriate adjustment of the proportions can effectively reduce its formation