What is the difference for ceramic fiber and aluminum silicate fiber?

Aluminum silicate fiber is mainly made from melted alumina and silicon oxide, inwhich the alumina take a large part, and the alumina is the main component of the porcelain, so was also call it as ceramic fiber.  When we talk about ordinary ceramic fiber we often refer to aluminum silicate fiber, they are the same kind of product. And in the market, there are a lot of people call ceramic fiber board as fireproof board, insulation board; and call ceramic fiber blanket as thermal insulation blanket, thermal blanket, fireproof blanket, etc., they are refractory ceramic fiber material in nature although in different names.