GLASS CERAMIC ARTICLES HAVING IMPROVED PROPERTIES AND METHODS FOR MAKING THE SAME

• Main Authors: KITTLESON, ANDREW PETER, KROEMER, KATHERINE WEBER, RIDGE, JOHN RICHARD, FU, QIANG, SALTZER, JR, HALL, JILL MARIE, TROSA, MATTHEW DANIEL, WILSON, SHELBY KERIN, CLICK, CAROL ANN, HUBERT, MATHIEU GERARD JACQUES, SMITH, CHARLENE MARIE, MOORE, GALAN GREGORY, ZHENG, ZHEMING, JOSHI, DHANANJAY, STAPLETON, ERIKA LYNN, EDMONSTON, JAMES HOWARD, RAI, ROHIT, YANG, BIN, UKRAINCZYK, LJERKA
• Format: Patent
• Language: English; French
• Published: 23.01.2020
• Subjects: CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS; CHEMISTRY; DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; FREQUENCY-CHANGING; GLASS; JOINING GLASS TO GLASS OR OTHER MATERIALS; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; METALLURGY; MINERAL OR SLAG WOOL; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; PERFORMING OPERATIONS; PHYSICS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS; SURFACE TREATMENT OF GLASS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; TRANSPORTING

A glass ceramic article including a lithium disilicate crystalline phase, a petalite crystalline phased, and a residual glass phase. The glass ceramic article has a warp (µm) < (3.65x10-6/µm diagonal2) where diagonal is a diagonal measurement of the glass ceramic article in µm, a stress of less than 30 nm of retardation per mm of glass ceramic article thickness, a haze (%) < 0.0994t + 0.12 where t is the thickness of the glass ceramic article in mm, and an optical transmission (%) > 0.91 10(2-0.03t) of electromagnetic radiation wavelengths from 450 nm to 800 nm, where t is the thickness of the glass ceramic article in mm. L'invention concerne un article en vitrocéramique comprenant une phase cristalline de disilicate de lithium, une phase cristalline de pétalite et une phase vitreuse résiduelle. L'article en vitrocéramique présente un gauchissement (µm) < (3,65x10-6/µm diagonale2) où diagonale est une mesure diagonale de l'article en vitrocéramique en µm, une contrainte inférieure à 30 nm de retard par mm d'épaisseur d'article en vitrocéramique, un voile (%) < 0,0994t + 0,12, où t est l'épaisseur de l'article en vitrocéramique en mm, et une transmission optique (%) > 0,91 10(2-0,03t) de longueurs d'onde de rayonnement électromagnétique de 450 nm à 800 nm, t étant l'épaisseur de l'article en vitrocéramique en mm.