Halloysite powder is a natural clay mineral powder renowned for its unique properties and wide - ranging applications. It is composed mainly of hydrated aluminum silicate with a chemical formula approximately Al₂Si₂O₅(OH)₄·nH₂O.
Structurally, halloysite features a tubular or cylindrical morphology. These nanotubes have an inner hollow core and a diameter typically in the range of 10 - 100 nanometers, with lengths reaching several micrometers. This distinct nanostructure endows halloysite powder with a large specific surface area, often exceeding 80 - 100 m²/g.
In terms of properties, halloysite powder shows good thermal stability. It can withstand relatively high temperatures without significant decomposition or loss of its structural integrity, making it suitable for applications in high - temperature environments. It also exhibits chemical stability, being resistant to many common acids and alkalis to a certain extent.
