Glass ceramic containing micro nano crystals and preparation method of glass ceramic

Abstract

The invention discloses glass ceramic containing micro nano crystals and a preparation method of the glass ceramic. The micro nano crystals are formed in a glass substrate by post-processing, the average crystal size of the micro nano crystals is less than or equal to 100 nm, the crystal phase includes at least one selected from a beta-quartz solid solution, nepheline and a nepheline solid solution, the glass ceramic has a Vickers hardness higher than 600 kgf / mm<2>, the post-processing refers to introducing a crystal nucleus element into the glass substrate by ion exchange and promoting growthof the micro nano crystals by the crystal nucleus through external energy, and the glass substrate can form a surface compressive stress depth of more than 80 [mu]m after the ion exchange. The glassceramic provided by the invention has the Vickers hardness improved by 10% or more than that of the glass substrate, and can obtain higher strength by chemical strengthening treatment; the preparationmethod of the glass ceramic can realize continuous production, and the preparation method has high universality; and the glass ceramic has an antibacterial function, an expanded application range andwider applicability.

Description

technical field [0001] The invention relates to the technical field of glass production and manufacturing, in particular to a glass ceramic containing micro-nano crystals and a preparation method thereof. Background technique [0002] With the popularity of large-area touch-screen electronic products such as smart phones and tablet computers, consumers have higher requirements for the anti-destructive performance of the display screen, such as impact resistance, drop resistance, and scratch resistance. The protective cover material needs to be further increased in strength and hardness to meet the requirements. With its excellent transparency, hardness, corrosion resistance, and easy processing and molding, glass will soon replace polymer materials such as acrylic in the field of screen protection. [0003] Glass ceramics is a new material that can be crystallized as a whole with a large number of microcrystals by adding a crystal nucleating agent to the glass raw material a...

AI Technical Summary

Problems solved by technology

However, in the production process of glass ceramics, due to the need to add a crystal nucleating agent to the glass, the tendency of glass devitrification is serious, and it is easy to produce devitrification during the molding process, resulting in difficulties in continuous production and high costs.

Moreover, the traditional glass ceramics containing crystal nucleating agents, due to their high strength and hardness, are difficult to cut, grind and polish in the cold section of the product; Problems such as growth and crystal change occur, which affect product quality and reduce product yield

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