CHEMICALLY STRENGTHENED LITHIUM DISILICATE-PETALITE GLASS-CERAMICS

• Main Authors: SMITH CHARLENE MARIE, NONI LISA MARIE, UKRAINCZYK LJERKA, WILSON SHELBY KERIN, ANDREWS RYAN CLAUDE, FAHEY ALBERT JOSEPH, ROUSSEV ROSTISLAV VATCHEV
• Format: Patent
• Language: Chinese; English
• Published: 30.10.2020
• Subjects: CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS; CHEMISTRY; GLASS; JOINING GLASS TO GLASS OR OTHER MATERIALS; METALLURGY; MINERAL OR SLAG WOOL; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS; SURFACE TREATMENT OF GLASS

Ion-exchanged glass ceramic articles described herein have a stress that decreases with increasing distance according to a substantially linear function from a depth of about 0.07t to a depth of about0.26t from the outer surface of the ion-exchanged glass ceramic article from a compressive stress to a tensile stress. The stress transitions from the compressive stress to the tensile stress at a depth of from about 0.18t to about 0.25t from the outer surface of the ion-exchanged glass ceramic article. An absolute value of a maximum compressive stress at the outer surface of the ion-exchanged glass article is from 1.8 to 2.2 times an absolute value of a maximum central tension (CT) of the ion-exchanged glass article, and the glass ceramic article has a fracture toughness of 1 MPa*m or more as measured according to the double cantilever beam method. 本文所述的离子交换玻璃陶瓷制品具有应力，所述应力根据基本线性函数，在距离离子交换玻璃陶瓷制品外表面约0.07t的深度到约0.26t的深度，随着距离增加从压缩应力减小到拉伸应力。所述应力在距离离子交换玻璃陶瓷制品的外表面约0.18t至约0.25t的深度处从压缩应力转变成拉伸应力。离子交换玻璃制品的外表面处的最大压缩应力的绝对值是离子