Transparent spinel glass ceramic and preparation method therefor and use thereof

Abstract

Disclosed in the invention is transparent spinel glass ceramic, in mole percentage of oxides, the glass ceramic comprising: LizO: 3.50˜6.00 mol %, Na2O: 2.00˜4.00 mol %. A crystal phase of the glass ceramic has a spinel crystal and a zirconia crystal, and does not have a crystal containing Li. According to the invention, components of a spinel glass ceramic material are optimized by introducing into the spinel glass ceramic more Li ions and Na ions used for chemical strengthening via ion exchange to obtain the spinel glass ceramic without an impurity crystal phase, and the glass ceramic does not exhibit phenomena of atomization, devitrification and the like, ensuring that the glass ceramic material has an excellent transmittance. More Li ions and Na ions are introduced into the spinel glass ceramic components, so that the prepared spinel glass ceramic can be chemically strengthened to obtain transparent strengthened glass ceramic having high CS, DOL_0, CT_AV and CT_LD, and the strengthened glass ceramic shows excellent drop resistance performance.

Dependencies are inferred from the claim text.