Ultrathin toughened glass with low curvature radius, preparation method thereof, glass device, and mother glass

Abstract

The invention discloses an ultrathin toughened glass with a low curvature radius, a preparation method thereof, a glass device, and a mother glass. The thickness of the toughened glass is in a range of 30 to 150 [mu]m; the surface pressure stress of any surface of the toughened glass is in a range of 300 to 1200 MPa; in a toughened glass 2PB test, the minimal value of the curvature radius of a formed curved surface is in a range of 2 to 12 mm; in a toughened glass 2PB bending test, the toughened glass can bear a maximal bending pressure of 200 to 800 MPa; the absolute value of the linear density integral of the tensile stress of unit thickness of the toughened glass is 5000 to 160000 MPa/mm; and the Vickers hardness of the toughened glass is in a range of 580 to 780 kgf/mm2. A conventionaltoughening technology is optimized to reduce or eliminate micro-cracks in the glass surface and reduce the internal stress of glass; at the same time, the pressure stress on the glass surface and thedepth of an ion exchange layer are controlled in a certain range to realize high flexibility and strong thermal shock resistant performance, and the toughened glass can be bended in a small curvatureradius or can be repeatedly folded.

Description

technical field [0001] The invention relates to the technical field of glass production and manufacturing, in particular to an ultra-thin strengthened glass with a low curvature radius, a preparation method thereof, a glass device and plain glass. Background technique [0002] At present, the domestic smartphone industry is developing rapidly, and consumers have higher and higher requirements for mobile phone innovation. In recent years, the concept of foldable screens and foldable mobile phones has been valued by major manufacturers, which is the development direction of smart phones. The form of foldable mobile phones has the potential to detonate both in terms of attracting the attention of market users and media, and in terms of its technological innovation itself. The potential of the market and the improvement of screen display technology have been changing the way humans receive information. The screen changes brought about by foldable technology have obviously subver...

AI Technical Summary

Problems solved by technology

For the flat panel display industry, the screen glass used must meet certain strength requirements. The strength of the glass can be greatly improved by using traditional chemical strengthening methods, but the requirements for ultra-thin glass used in foldable screens are far from being met.

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