| abstract |
(57) [Summary] The present invention provides a method of reacting a compound of the general chemical formula R 1+ (y / 2) Zr 4 P 6-y Si y O 24 (where 0 ≦ y ≦ 1.0 and R is a metal Ca , Sr, and Ba), a metal oxide source capable of forming a reaction product composed of an NZP-type phase having the same general chemical formula as above, and a pre-reacted powder thereof. Preparing a mixture from an NZP-forming raw material powder selected from the group consisting of a mixture and a precursor additive selected from the group consisting of a silica precursor, a zirconia precursor, and a mixture thereof; forming into a green structure Calcining the green structure to obtain a diesel particulate filter having an open porosity of at least 35% by volume, a median pore size of at least 8 micrometers and a permeability of at least 0.30 × 10 −12 m 2. Ceramics that are suitable as By producing Kufiruta, it provides a method for manufacturing a ceramic filter. |