Patent ID: 8454887
Filing Date: 2013-06-04
Classification: B29B,C04B,Y10T

Abstract:
1. A method for pore size distribution control in a fired ceramic article comprising: selecting a batch composition for a green body precursor to the fired ceramic article; selecting a pore size distribution in the fired ceramic article comprising a first, a second, and a third pore size distribution; calculating a heating-rate (HR) in ° C./hour for firing the green body precursor at a first temperature range (A) of 950 to 1,050° C., a second temperature range (B) of 1,050 to 1,150° C., a third temperature range (C) of 1,150 to 1,250° C., and a fourth temperature range (D) of 1,250 to 1,350° C., respectively, according to: where P is the pore size distribution in % vol, a, b and e represent the first, second, and third pore size distributions of <2, 2 to 5, and 5 to 10 microns, respectively, for low to high % intrusion volumes of: Av is the average of the low and high P values, R is the range of the low and high P values divided by 2; and firing a green body precursor having the selected batch composition according to the calculated heating-rate, the median pore size diameter (MPD) of the fired ceramic article being greater than or equal to 5 micrometers.