| 摘要 |
PROBLEM TO BE SOLVED: To provide a crystallized glass article excellent in both mechanical strength and fanciness for an exterior material of an architectural structure, an interior material or an object for interior design, and to provide a method for manufacturing the same. SOLUTION: A crystallized glass plate 1 of this invention comprises crystallized glass whose volume ratio of a glassy phase is at least 70%, wherein a compressive stress lamina 2 having a stress value of at least 100 MPa and at least 20μm thickness is formed on a free surface 1a by an ion exchange treatment. In addition, in the manufacture method of this invention, a crystallized glass body of a desired profile is made in contact with a molten salt adjusted near the strain point temperature of the crystallized glass, and an alkali metal ion of R<SB>2</SB>O in a glassy phase of the side of the free surface 1a is substituted by an alkali metal ion having a larger ionic radius than it to form the compressive stress lamina 2. COPYRIGHT: (C)2006,JPO&NCIPI
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