Title:
GLASS-CERAMIC PRODUCT AND ITS PRODUCTION
Document Type and Number:
Japanese Patent JP2954865
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain a low alkali glass-ceramic product having a high modulus of elasticity and contg. a crystal phase gathered body consisting essentially of uniformly distributed superfine spinel type crystals of uniform size by imparting a specified compsn.
SOLUTION: This glass-ceramic product has about 14×106-24×106psi Young's modulus and >1.0MPa.m1/2 fracture toughness, is formed from a crystal gathered body consisting essentially of spinel type crystals of uniform size uniformly dispersed in a highly siliceous residual glass matrix phase and has a compsn. consisting essentially of, by weight, 35-60% SiO2, 20-35%Al2O3, 0-25% MgO, 0-20% ZnO, 0-20% TiO2, 0-10% ZrO2, 0-2%Li2O and 0-8% NiO (expressed in terms of oxides). The total amt. of MgO and ZnO is at least about 10%, and when the amt. of Al2O3 is about <25%, the total amt. of TiO2, ZrO2 and NiO is ≥5%.
Inventors:
JOOJI HORUSEI BIIRU
RINDA RUUSU PINKUNII
RINDA RUUSU PINKUNII
Application Number:
JP28509995A
Publication Date:
September 27, 1999
Filing Date:
November 01, 1995
Export Citation:
Assignee:
KOONINGU INC
International Classes:
C03B27/00; C03C10/00; C03C10/02; G11B5/66; G11B5/73; (IPC1-7): C03C10/00; G11B5/66
Attorney, Agent or Firm:
Seiji Yanagida (1 person outside)