公开(公告)号：WO2015054456A2

公开(公告)日：2015-04-16

申请号：PCT/US2014059833

申请日：2014-10-09

Applicant: CORNING INC

Inventor： BEUNET LIONEL JOEL MARY ,  COMTE MARIE JACQUELINE MONIQUE ,  FREDHOLM ALLAN MARK ,  FU QIANG ,  PARIS ANNE ,  PESCHIERA SOPHIE ,  SMITH CHARLENE MARIE

IPC: C03C3/093

CPC classification number: C03C10/0027 ,  C03B32/02 ,  C03C3/093 ,  C03C10/0018 ,  C03C10/0045 ,  C03C10/0054 ,  C03C21/002 ,  Y10T428/315

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 400-700nm for an about 0.8mm 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.

Abstract translation: 公开了具有至少15kgf的维氏体压痕裂纹起始阈值的玻璃陶瓷。 这些玻璃陶瓷可以是离子交换的或离子交换的。 玻璃陶瓷包括通过使薄的前体玻璃制品经受平均冷却速度在约10℃/分钟至约25℃/分钟范围内的陶瓷循环而产生的结晶和非晶相。 在一个或多个实施方案中，结晶相可以包含至少20wt％的玻璃陶瓷。 玻璃陶瓷可以包括作为主要结晶相的β-锂辉石β，并且在400-700nm的波长范围内可以表现出大约85％的不透明度，约0.8mm厚度，并且观察角度为10°，CIE光源 F02用包括-3和+3之间的* *，-6和+6之间的b *，以及88和97之间的L *的镜面反射率确定。