Glass ceramic with high elasticity modulus, and reinforced glass ceramic and preparation method thereof

A technology of glass ceramics and strengthened glass, applied in the field of glass ceramics, can solve the problems of poor strength, easy to break, impact resistance, bending strength and other performance limitations, and achieve the effect of tight network structure

Active Publication Date: 2020-05-01
CHONGQING XINJING SPECIAL GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is: the elastic modulus of ordinary high-alumina-silicate glass is 60-75Gpa, the elastic modulus of lithium-aluminosilicate glass is 75-85Gpa, and there are limita

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The present embodiment provides a glass-ceramic with a high modulus of elasticity, and the glass-ceramic comprises 30% Li by mole percent 2 O,

[0052] Specifically, in terms of mole percentage, the glass-ceramic is prepared from the following components: SiO 2 55%, Al 2 o 3 5%, P 2 o 5 2%, B 2 o 3 0%, MgO 1.1%, ZnO 0%, ZrO 2 5%, Na 2 O 1.5%, Li 2 O 30%, CeO 2 0.3%, SnO 2 1%, Ta 2 o 3 0%.

[0053] The first heat treatment temperature is 500°C, and the time is 2h; the second heat treatment temperature is 620°C, and the time is 1h; Lithium disilicate + ZrO 2 Glass ceramics with main crystal phase, the crystal size of glass ceramics is between 25 and 30nm, and the Young's modulus is 110Gpa.

[0054] The glass-ceramics prepared above were treated with NaNO 3 :KNO 3 :LiNO 3 Ion exchange at 450°C for 4 hours in a mixed salt bath of 10:90:0, the tensile stress line density of the obtained strengthened glass ceramics is 60000Mpa / mm; the depth of the stre...

Embodiment 2

[0056] The present embodiment provides a glass-ceramic with a high modulus of elasticity, and the glass-ceramic comprises 18 mole percent Li 2 O,

[0057] Specifically, in terms of mole percentage, the glass-ceramic is prepared from the following components: SiO 2 70%, Al 2 o 3 3%, P 2 o 5 1%, B 2 o 3 1%, MgO 0%, ZnO 0.5%, ZrO 2 1.5%, Na 2 O 3%, Li 2 O 18%, CeO 2 0.05%, SnO 2 0.15%, Ta 2 o 3 1.8%.

[0058] The first heat treatment temperature is 600°C, and the time is 0.5h; the second heat treatment temperature is 700°C, and the time is 2h; the glass ceramic with lithium disilicate + lithium silicate as the main crystal phase is produced, and the crystal size of the glass ceramic is 70-80nm Between, Young's modulus 90Gpa.

[0059] The glass-ceramics prepared above were treated with NaNO 3 :KNO 3 :LiNO 3 In the first mixed salt bath of 100:0:0, ion exchange was carried out at 450°C for 3 hours, and then in NaNO 3 :KNO 3 :LiNO 3 Ion exchange was carrie...

Embodiment 3

[0061] The present embodiment provides a glass-ceramic with a high modulus of elasticity, and the glass-ceramic comprises 20% Li by mole percent 2 O,

[0062] SiO 2 65%, Al 2 o 3 7%, P 2 o 5 3%, B 2 o 3 0.8%, MgO 0%, ZnO 0%, ZrO 2 2%, Na 2 O2%, Li 2 O 20%, CeO 2 0.2%, SnO 2 0%, Ta 2 o 3 0%.

[0063] The first heat treatment temperature is 580°C for 4 hours; the second heat treatment temperature is 650°C for 6 hours; glass ceramics with lithium disilicate + lithium permealite as the main crystal phase are produced, and the crystal size of glass ceramics is 30-40nm Between, Young's modulus 95Gpa.

[0064] The glass-ceramics prepared above were treated with NaNO 3 :KNO 3 :LiNO 3 In the first mixed salt bath of 98:2:0, ion exchange was carried out at a temperature of 500 °C for 4 hours, and then in NaNO 3 :KNO 3 :LiNO 3 Ion exchange was carried out at 500°C for 4 hours in the second mixed salt bath of 0:100:0; the tensile stress line density of the obt...

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Abstract

The invention provides a glass ceramic with high elasticity modulus. The principal crystalline phase of the glass ceramic is composed of at least two selected from the group consisting of lithium silicate, lithium disilicate, petalite and ZrO2. The glass ceramic comprises 18%-30% of Li2O in molar percentage, and the crystal size of the glass ceramic is 10-80 nm; the elastic modulus of the glass ceramic is at least 90 Gpa. The glass ceramic comprises the following components in percentage by mol: 55-70% of SiO2, 3-10% of Al2O3, 1-6% of P2O5, 0.5-5% of ZrO2, 0.5-5% of Na2O, 18-30% of Li2O and 0-3% of Ta2O5. The glass ceramic further comprises at least one of the following oxides: 0 to 0.5% of CeO2, 0 to 0.5% of SnO2, 0 to 5% of B2O3, 0 to 5% of ZnO and 0 to 5% of MgO. The invention relates to the glass ceramic with high Li content; the network structure of the glass ceramic is compact; the obtained principal crystalline phase is composed of lithium disilicate and a beta quartz solid solution; due to the high crystallization ratio and crystal type of the glass ceramic, a material with elasticity modulus higher than 90 Gpa can be obtained; and a glass ceramic material with visible light transmittance higher than 90% can be obtained by controlling the crystal size, and the glass ceramic material can be used for window materials of aviation airplanes, high-speed rails, subways, carsand the like.

Description

technical field [0001] The invention belongs to the technical field of glass products, in particular to a glass ceramic with high elastic modulus. Background technique [0002] Ceramic glass, also known as glass-ceramic, is a kind of composite material combined with crystal phase and glass made through high-temperature melting, molding and heat treatment. [0003] With high mechanical strength, adjustable thermal expansion, thermal shock resistance, chemical corrosion resistance, low dielectric loss and other superior properties, it is widely used in machinery manufacturing, optics, electronics and microelectronics, aerospace, chemistry, industry, biomedicine and Construction and other fields; due to the complex manufacturing process and high technical requirements of glass ceramic panels, the high-quality glass ceramic production process and control technology are basically monopolized by foreign countries, and the domestic glass ceramic production process has problems such...

Claims

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Application Information

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IPC IPC(8): C03C10/02C03C10/04C03C10/12
CPCC03C10/0027
Inventor 胡伟张延起谈宝权陈芳华
Owner CHONGQING XINJING SPECIAL GLASS CO LTD
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