| 摘要 |
PURPOSE:To obtain an inorg. lamellar porous body having superior heat insulating characteristic by inserting specifically modified silica sol and quat. ammonium salt into the space between layers of swellable lamellar compd. which has been swollen, and forming fine voids between the layers by calcination. CONSTITUTION:Silica sol 5 having surface modified with quat. ammonium ion or ammonium ion 6, quat. ammonium salt 7 (e.g. octadecyl trimethyl ammonium chloride), and/or water-soluble polymer (e.g. polyethylene glycol) are inserted into a space between the layers 1, 1 of a swellable lamellar compd. (e.g. Na montmorillonite) which has been swollen. Then, the compd. is dried and calcined to remove the quat. ammonium ion 6, quat. ammonium salt 7, etc., by the thermal decomposition, forming fine voids between the layers 1, 1. Thus, an inorg. lamellar porous body is obtd. The porous body is usable suitably for a heat insulating material.
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