The flexibility of the present invention, there is heat resistance, is porous, it is non-conductive for electricity, excellent insulation, has adsorbability, it intensional allow various chemicals clay material inside I will provide a novel porous clay material. Preparing a clay paste is dispersed in a solvent mainly composed of water or water, a reinforcement and a small amount of additive and the clay clay major component, or additive, and clay, the bottom plate of metal and the clay paste By poured into a mold and a resin mold, subliming and lyophilized after freezing to obtain a porous clay material which constitutes a through hole in the thickness direction, having a specific surface area and a large porosity.本発明は柔軟性が高く、耐熱性があり、多孔質であり、電気に対して不導体であり、断熱性に優れ、吸着能を有し、粘土材内部に種々の化学物質を内包可能な新規多孔質粘土材料を提供する。主要成分の粘土、粘土と添加物、又は粘土と添加物と少量の補強材を、水又は水を主成分とする溶媒に分散させた粘土ペーストを調製し、この粘土ペーストを金属製の底板と樹脂製型枠とを有する成形型に流し込み、凍結後凍結乾燥し昇華させることによって、厚み方向に貫通孔を構成し、大きな気孔率と比表面積を持つ多孔質粘土材料を得る。
