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Chemical toughened glass capable of carrying out subsequent cutting

A chemical tempered glass and follow-up technology, applied in high-strength fields, can solve problems such as glass debris residue, peeling, glass surface damage, etc.

Inactive Publication Date: 2011-08-31
SCHOTT GLASS TECH (SUZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using this method, there will be microcracks, peeling, damage to the glass surface and glass debris remaining on the edge of the glass

Method used

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  • Chemical toughened glass capable of carrying out subsequent cutting
  • Chemical toughened glass capable of carrying out subsequent cutting
  • Chemical toughened glass capable of carrying out subsequent cutting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0139] The main component of glass is SiO 2 63%, Al 2 o 3 16%, Na 2 O 13%, K 2 O 3.55%, MgO 3.95%, the rest is SnO 2 .

[0140] First, mix the corresponding raw materials according to the ingredients given in the examples in Table 1, melt the raw materials through a platinum crucible at 1600-1640°C and keep them warm for 5-15 hours, then clarify at 1640-1660°C, and then cool down to Around 1600°C. The platinum crucible was taken out from the high-temperature furnace, and the glass melt was poured into a cold stainless steel mold to obtain a bulk glass with a size of approximately 50×50×40 mm. Then put the glass along with the stainless steel mold into an annealing furnace at about 600°C for 2 to 8 hours for annealing.

[0141] The annealed glass is polished, then cut, edged, and finely planed to the required sample size, ie 40×40×0.7mm. The surface roughness after polishing is below 1 nanometer.

[0142] The coefficient of thermal expansion and the transition point ...

Embodiment 2

[0147] Glass samples were prepared in the same manner as in Example 1.

[0148] The thickness of the glass sample is 0.7mm. Pure KNO chemically tempered at 440°C 3 6 hours in a salt bath. The surface stress is 700Mpa, the central stress is 45Mpa, and the stress layer depth is 40μm.

[0149] Using CO 2 The laser is used for cutting. After adjusting the laser beam power and moving speed, the glass cannot be cut smoothly. The reason is that the depth of the stress layer and the central tensile stress are too large.

Embodiment 5

[0151] Glass samples were prepared in the same manner as in Example 1.

[0152] The thickness of the glass sample is 1.0mm. Pure KNO chemically tempered at 390°C 3 8 hours in a salt bath. The surface stress is 1000Mpa, the central stress is 10Mpa, and the stress layer depth is 10μm.

[0153] Using CO 2 The laser is used for cutting, the power of the laser is 100W, the moving speed of the laser beam is 180mm / s, and the glass can be cut smoothly. Edge quality is good. Glass edge quality is visible Figure II shown.

[0154] At the same time, the glass can also be cut using a conventional glass cutting table with a knife wheel, such as Figure three shown. However, there are a large number of tiny gaps at the edges, which cannot be mass-produced.

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Abstract

The invention discloses chemical toughened glass capable of carrying out subsequent cutting, which is characterized in that the Young modulus of the glass is 70-100MPa, the Knoop hardness (0.1 / 20, 100 gram force, 20s) of the glass is 500-800Kg / mm<2>, and the CTE (Coefficient of Thermal Expansion) of the glass is 5.0-11.0*10<-6> / DEG C.

Description

technical field [0001] The present invention relates to thin glass that can be cut after chemical toughening. Specifically, the present invention relates to silicate glass with high strength, high fracture toughness, and high wear resistance, which has the property of being chemically tempered, and can be laser cut after tempering. More specifically, the present invention relates to glass that can be used in electronic product screens and other fields involving high-strength thin glass, and after chemical toughening, it can be well followed by laser cutting. At the same time, the invention also relates to a method for chemically tempering the silicate glass. Background technique [0002] High-strength glass is required in many technical fields. The most typical way to increase the strength of glass is to perform surface treatment on the glass, such as acid etching. Another method is to introduce permanent stress in the glass, which is known as physical tempering (or therm...

Claims

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Application Information

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IPC IPC(8): C03C3/076C03C3/093C03C3/091C03C3/089C03C3/097
CPCC03C21/002C03C3/093C03C3/097C03C3/095C03C3/091
Inventor 王冲雷蒙德·尚乔斯·西默马蒂亚斯·巴塞尔
Owner SCHOTT GLASS TECH (SUZHOU) CO LTD
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