Title:
【発明の名称】ガラスセラミック製品
Document Type and Number:
Japanese Patent JP2648673
Kind Code:
B2
Abstract:
This invention is concerned with the production of glass-ceramic articles wherein enstatite constitutes the predominant crystal phase. Compositions exhibiting a high modulus of rupture, a use temperature in excess of 1200 DEG C, and a high fracture toughness consist essentially, expressed in terms of weight percent on the oxide basis, of about 20-35% MgO, 2-12% Al2O3, 40-70% SiO2, and at least one metal oxide in the indicated proportions selected from the group consisting of 0-2% Li2O, 0-4% CaO, 0-12% SrO, and 0-17% BaO, at least 0.5% Li2O being required when present alone and at least 1% SrO and/or BaO being required in the absence of Li2O. Compositions exhibiting a use temperature of 1500 DEG C consist essentially, expressed in terms of weight percent on the oxide basis, of about 30-35% MgO, 53-58% SiO2, and 10-14% ZrO2.
Inventors:
JOOJIHARUSHIIBIOORU
Application Number:
JP25705987A
Publication Date:
September 03, 1997
Filing Date:
October 12, 1987
Export Citation:
Assignee:
KOONINGU INC
International Classes:
C03C3/085; C03B32/00; C03B32/02; C03C10/00; C03C10/04; C03C10/06; C03C10/12; C03C10/14; (IPC1-7): C03C10/06; C03B32/02; C03C10/12; C03C10/14
Domestic Patent References:
| JP54111517A |
Attorney, Agent or Firm:
Seiji Yanagida (1 person outside)