Invention Grant
- Patent Title: Crack-resistant glass-ceramic articles and methods for making the same
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Application No.: US15641875Application Date: 2017-07-05
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Publication No.: US10822267B2Publication Date: 2020-11-03
- Inventor: Lionel Joel Mary Beunet , Marie Jacqueline Monique Comte , Allan Mark Fredholm , Qiang Fu , Anne Paris , Sophie Peschiera , Charlene Marie Smith
- Applicant: CORNING INCORPORATED
- Applicant Address: US NY Corning
- Assignee: CORNING INCORPORATED
- Current Assignee: CORNING INCORPORATED
- Current Assignee Address: US NY Corning
- Agent Kevin M. Johnson
- Main IPC: C03C10/00
- IPC: C03C10/00 ; C03B32/02 ; C03C3/093 ; C03C21/00

Abstract:
Glass-ceramics exhibiting a Vickers indentation crack initiation threshold of at least 15 kgf are disclosed. These glass-ceramics may be ion exchangeable or ion exchanged. The glass-ceramics include a crystalline and amorphous phases generated by subjecting a thin precursor glass article to ceramming cycle having an average cooling rate in the range from about 10° C./minute to about 25° C./minute. In one or more embodiments, the crystalline phase may comprise at least 20 wt % of the glass-ceramics. The glass-ceramics may include β-spodumene ss as the predominant crystalline phase and may exhibit an opacity ≥about 85% over the wavelength range of 400-700 nm for an about 0.8 mm thickness and colors an observer angle of 10° and a CIE illuminant F02 determined with specular reflectance included of a* between −3 and +3, b* between −6 and +6, and L* between 88 and 97.
Public/Granted literature
- US20170341974A1 CRACK-RESISTANT GLASS-CERAMIC ARTICLES AND METHODS FOR MAKING THE SAME Public/Granted day:2017-11-30
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