Method for manufacturing crystallized glass member having curved shape
AssigneeKabushiki Kaisha Ohara
InventorsMoriji Nozaki, Toshitaka Yagi, Yutaka Yamashita, Naoyuki Goto
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Abstract
A method for manufacturing a crystallized glass member having a curved shape includes a deforming step of deforming at least a portion of a glass plate into a curved shape by an external force that acts on the glass plate while maintaining the temperature of the glass plate within a first temperature range and precipitating crystals from the glass plate. In the method for manufacturing a crystallized glass member having a curved shape according to Claim 1, the first temperature range is from [At−40]° C. to [At+40]° C., wherein At (° C.) is a yield point of the glass plate.
Claims15
A method for manufacturing a crystallized glass member having a curved shape, comprising a deforming step of deforming at least a portion of a glass plate into a curved shape by an external force that acts on the glass plate while maintaining a temperature of the glass plate within a first temperature range that is from 705° C. to 790° C. and precipitating a crystal from the glass plate, and after the deforming step, a crystallizing step of further precipitating a crystal from the deformed glass plate while maintaining a temperature of the deformed glass plate within a second temperature range,
- wherein the glass plate is the one in which crystals precipitate at a temperature in a range of [Tg]° C. to [At+50]° C., wherein Tg (° C.) is a glass transition point of the glass plate and At (° C.) is a yield point of the glass plate,
- the upper limit of temperature of the glass plate to complete a crystallization of the glass plate is 790° C., and
- an upper limit of the second temperature range is lower than an upper limit of the first temperature range.
Dependencies are inferred from the claim text.