Glass ceramic and temp. compensation parts

Application Number  00129499 Application Date  2000.12.29
Publication Number  1345700 Publication Date  2002.04.24
Priority Information   2000/9/28 JP 296684/00  
Applicant(s) Name  Ohara K.K.  
Inventor(s) Name  Shinto Saiko  
Patent Agency Code  72001 Patent Agent  lu xinhua
AbstractA glass ceramic comprises a main crystal phase which comprises at least one selected from a group consisting of beta-eucryptite (beta-Li2O.Al2O3.2SiO2), beta-eucryptite solid solution (beta-Li2O.Al2O3.2SiO2 solid solution), beta-quartz (beta-SiO2), and beta-quartz solid solution (beta-SiO2 solid solution), wherein an average grain size of the main crystal phase is less than 5 mum, and a coefficient of thermal expansion thereof is -30×10-7 to -90×10-7/ DEG C. in a temperature range of -40 DEG C. to +160 DEG C., and a hysteresis of the coefficient of thermal expansion is not more than 20 ppm.