Ceramic filter

摘要

A ceramic filter ( 1 ) comprising a porous body ( 2 ) and filtration membranes ( 5 ), wherein the cross section shapes of plural main flow passages ( 3 ) provided in a direction perpendicular to the flow direction of fluid to be purified or purified fluid are aligned in rows. The cross section shape of a specific partition wall part ( 18 ) is formed in perpendicular to flow direction of the fluid formed as to be encompassed by a shape defined by two parallel lines apart at a specified distance from each other. The cross section shape of a first specific main flow ( 3 a) perpendicular to the fluid flow direction is formed in a polygon of heptagon or more arranged in a specified state. The angles theta₁, theta₂, theta₃, and theta₄ are within the range of 110 to 160° , and the symbols A and B satisfy the relation 0.3 B<=A<=0.7 B.