Process for producing alumina silica sintered ceramics having im

Details Process for producing alumina silica sintered ceramics having im Process for producing alumina silica sintered ceramics having im

1987-06-24

1990-01-23

Dixon, Jr., William R.

Compositions: ceramic

Ceramic compositions

Refractory

501133, 423327, 264 66, C04B 3518

Patent

active

048958140

ABSTRACT:
An alumina silica sintered ceramic that is produced by the normal sintering method and which has bending strength of at least 300 MPa at room temperature and at least 400 MPa at an elevated temperature, for example, 1,300.degree. C. is disclosed.
This sintered ceramic is produced by a process comprising the following steps: providing a chiefly amorphous starting powder that consists of 62-73 wt % Al.sub.2 O.sub.3 and correspondingly 38-27 wt % SiO.sub.2 ; calcining this starting powder to make a calcined product that is chiefly composed of a crystalline phase and which contains oxides of an alkali metal and an alkaline earth metal in a total amount of no more than 1,500 ppm; pressing the ground particles of the calcined product into a compact; and sintering the compact at 1,500.degree.-1,750.degree. C. and at atmospheric pressure.

REFERENCES:
patent: 3533738 (1970-10-01), Rundell et al.
patent: 3857923 (1974-12-01), Gardner et al.
patent: 3922333 (1975-11-01), Mazdiyasni et al.
patent: 4266978 (1981-05-01), Prochazka
patent: 4272500 (1981-06-01), Eggerding et al.
patent: 4286024 (1981-08-01), Yoldas
patent: 4384046 (1983-05-01), Nakagami
patent: 4418024 (1983-11-01), Prochazka et al.
patent: 4418025 (1983-11-01), Prochazka et al.
patent: 4427785 (1984-01-01), Prochazka et al.
patent: 4593007 (1986-06-01), Novinski
Mah et al, "Mechanical Prop. of Mullite", J. Am. Ceramic Soc., vol. 66, pp. 699-703 (10-83).
Dokko et al, High Temp. Mech. Prop. of Mullite Under Compression, J. Am. Ceramic Soc., vol. 60, pp. 150-155 (Mar.-Apr. 1977).
Mazdiyasni et al, "Synthesis & Mech. Props. of Stoichiometric Aluminum Silicate", Report on 14th Annual Meeting of Am. Ceramic Soc. (1972), pp. 548-552.
Kanzaki et al, "Sintering & Mech. Prop. of Stoich. Mullite", J. Am. Ceramic Soc., 68(1), C-6-C-7 (1985).
Kanzaki et al, "Effects of Mullite Comp. on Its Microstructure and Strength", Preprint distributed at 23rd Symposium on Ceramic Basic Science, Tokyo, 1985 (5 pages).
Roy et al, "Preparation of Fine Oxide Powders by Evaporative Decomposition of Solutions" Ceramic Bulletin, vol. 56, No. 11 (1977), pp. 1023-1024.
Kanzaki et al, "Characterization of Spray-Pyrolyzed Spinel Powders" Yogyo-Kyokai-Shi, vol. 91(2), 1983, pp. 81-86 (English language translation of Abstract only).

Affiliated with

Also associated with

Rating

Process for producing alumina silica sintered ceramics having im does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for producing alumina silica sintered ceramics having im, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for producing alumina silica sintered ceramics having im will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-645210