| 摘要 |
A HIGH RIGIDITY GLASS-CERAMIC SUBSTRATE FOR A MAGNETIC INFORMATION STORAGE MEDIUM HAS A RATIO OF YOUNG'S MODULUS TO SPECIFIC GRAVITY WITHIN A RANGE FROM 37 TO 63 AND COMPRISES AL2O3 WITHIN A RANGE FROM 10% TO LESS THAN 20%. A PREDOMINANT CRYSTAL PHASE OF THE GLASS-CERAMIC SUBSTRATE CONSISTS OF ONE OR MORE CRYSTALS SELECTED FROM THE GROUP CONSISTING OF - ß QUARTZ, ß - QUARTZ SOLID SOLUTION, ENSTATITE, ENSTATITE SOLID SOLUTION, FORSTERITE AND FORSTERITE SOLID SOLUTION. |
