| 摘要 |
This invention relates to a method for making a composite opal glass article exhibiting very high mechanical strength and being composed of an interior portion and an integral surface layer containing crystals having a lower coefficient of thermal expansion than the glass such that the surface layer is under compression, the glass falling within the Li2O-Al2O3-SiO2-CeO2 composition area and including at least one photosensitive metal selected from the group consisting of copper, silver, and gold.
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