Abstract: The present invention provides a porous body having a pH adjusting function. This porous body can be obtained by a method including the steps of preparing a mixture including a glass powder A containing an alkali component, a powder B including at least one crystal selected from a) a clay mineral that has a layered crystal structure and b) a zeolite, and a powder C of a water-soluble inorganic salt, the mixture containing 0.05 to 3 parts by mass of the powder B and 0.2 to 4 parts by mass of the powder C with respect to 1 part by mass of the glass powder A; forming the mixture into a shaped body; firing the shaped body at a temperature lower than a melting point of the water-soluble inorganic salt and equal to or higher than a softening point of the glass contained in the glass powder A to obtain a fired body; and leaching the water-soluble inorganic salt from the fired body to obtain a granular porous body.

Abstract: An object of the present invention is to provide a separation membrane for a battery, which is excellent in heat resistance, does not expand and shrink depending on a temperature history, has no problem that, even when pressure is applied at a point due to external pressure, dendrite growth or the like, it is broken at the pressure point and its function is damaged at the broken part, and has no problem that the ionic conductivity decreases to decrease the battery performance, and to provide a battery equipped with such a separation membrane for a battery. A separation membrane for a battery which is constructed by binding a scaly inorganic porous material comprising silica, alumina or the like with a binder in a membrane shape, the separation membrane for a battery being provided on the surface of a positive electrode, a negative electrode or a separator of a battery.

Abstract: The present invention provides a method for producing a porous silica ceramic material, wherein the method includes a step of forming a mixture including silica particles, a binder and a plasticizer, a step of imparting porosity to a green obtained by the forming of the mixture, by extracting the plasticizer from the green, a step of impregnating the green to which the porosity has been imparted with a sintering aid, and a step of firing the green impregnated with the sintering aid.