I know that the raw material is silicon tetrachloride or monomethyltrichlorosilane. Which kind of raw material is better?

For the technology of white carbon black, there is no such thing as good or bad. Only for white carbon black enterprises whose domestic technology cannot be penetrated, monomethyltrichlorosilane is more difficult to handle, and the heat release is high, and the particle size is not well controlled. But for the best technology in the country, that kind of raw materials can be used, even mixed production. When the STC is short, the raw materials are more abundant.