Corning Incorporated

Anne Paris

Charlene Marie Smith

Qiang Fu

Allan Mark Fredholm

Marie Jacqueline Monique Comte

Sophie Peschiera

Thierry Luc Alain Dannoux

Thierry L Dannoux

Lionel Joel Mary Beunet

Antoine Gaston Denis Bisson

Antoine Bisson

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.

Crack-resistant glass-ceramic articles and methods for making the same

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&#xb0; C./minute to about 25&#xb0; 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 &#x3b2;-spodumene ss as the predominant crystalline phase and may exhibit an opacity &#x2265;about 85% over the wavelength range of 400-700 nm for an about 0.8 mm thickness and colors an observer angle of 10&#xb0; and a CIE illuminant F02 determined with specular reflectance included of a* between &#x2212;3 and +3, b* between &#x2212;6 and +6, and L* between 88 and 97.

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&#xb0; C./minute to about 25&#xb0; 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 &#x3b2;-spodumene ss as the predominant crystalline phase and may exhibit an opacity &#x2267;about 85% over the wavelength range of 400-700 nm for an about 0.8 mm thickness and colors an observer angle of 10&#xb0; and a CIE illuminant F02 determined with specular reflectance included of a* between &#x2212;3 and +3, b* between &#x2212;6 and +6, and L* between 88 and 97.

A microfluidic device () made from glass, ceramic or vitroceramic, comprises an upper layer (), a lower layer () and an intermediate layer (), the intermediate layer () comprising an upper face () and a lower face (), the lower face () comprising a first open structured surface defining a first microfluidic channel () and the upper face () comprising a second open structured surface defining a second microfluidic channel (); the lower surface of the intermediate layer () cooperating with a first planar layer closing the first microchannel (); the upper face () of the intermediate layer () cooperating with a second planar layer (), closing the second microfluidic channel () in a sealed manner, and the second planar layer constituting an intermediate layer () which cooperates, on its face opposite the intermediate layer (), with another layer () comprising on its inner face () a structured surface defining a third microfluidic channel ().

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Thomery, France

Anne Paris