Porous cordierite ceramics, a process for producing same and use of the porous cordierite ceramics.

摘要

New type porous cordierite ceramics having a new characteristic interconnecting open cellular structure and a hollow microspherical cordierite glass powder with a shell devoid of any pores or provided with a few or plenty of open pores which is used as a starting material for the porous cordierte ceramics. The porous cordierite ceramics are produced by subjecting a starting solution containing an alkyl silicate, an aluminium salt and an magnesium salt optionally with other compounds in an organic or acqueous organic solvent to spray thermal decomposition to prepare the hollow microspherical cordierte glass powder, and then processing the cordierte glass powder to a shaped body after or before an optional heat treatment and firing the shaped body at a temperature below the melting point of cordierte. The porous cordierte ceramics are useful as a carrier for gas' chromatography or various chemical reactions.