| 摘要 |
PCT No. PCT/JP95/00762 Sec. 371 Date Dec. 20, 1995 Sec. 102(e) Date Dec. 20, 1995 PCT Filed Apr. 19, 1995 PCT Pub. No. WO95/29141 PCT Pub. Date Nov. 2, 1995A zirconia-based sinter containing a boron compound and stabilized with a rare earth metal oxide is provided which has excellent fracture toughness, mechanical strength and thermal stability. A zirconia-based sinter comprising ZrO2 as the main component, one or more rare earth metal oxides, R2O3, selected from Yb2O3, Er2O3, Ho2O3, Y2O3, and Dy2O3, and a boron compound or a boron compound and Al2O3 and/or SiO2, wherein the molar proportion of R2O3/ZrO2 is from 1.3/98.7 to 2/98, excluding 2/98, and the content of boron components is from 0.05 to 8% by mole in terms of B2O3 or in addition thereto the content of Al2O3 is from 0.1 to 5% by mole and/or the content of SiO2 is from 0.05 to 1.5% by mole. A grinding part material and a bracket material for dental correction constituted of the zirconia-based sinter are provided. |
