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High-fracture-toughness microcrystalline glass for mobile phone backboard and preparation method of high-fracture-toughness microcrystalline glass

A glass-ceramic and high-fracture technology, which is applied in the field of high-fracture-toughness glass-ceramic for mobile phone backplanes and its preparation, can solve the problem that glass-ceramic cannot have both fracture toughness and chemical strengthening, and meets the requirements of chemical strengthening. , Improve the anti-drop performance and highlight the effect of fracture toughness

Active Publication Date: 2021-05-28
GLASS TECH RES INST OF SHAHE CITY OF HEBEI PROVINCE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention proposes a glass-ceramic with high fracture toughness for mobile phone backplanes and a preparation method thereof, which solves the problem that glass-ceramics in the prior art cannot have both fracture toughness and chemical strengthening

Method used

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  • High-fracture-toughness microcrystalline glass for mobile phone backboard and preparation method of high-fracture-toughness microcrystalline glass
  • High-fracture-toughness microcrystalline glass for mobile phone backboard and preparation method of high-fracture-toughness microcrystalline glass
  • High-fracture-toughness microcrystalline glass for mobile phone backboard and preparation method of high-fracture-toughness microcrystalline glass

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048]S1, weigh the raw material as various components, select the corresponding oxide, hydroxide, carbonate, nitrate, fluoride, chloride, hydroxide, and spermatic compounds, etc., according to the following weight percentage: 50% SIO25% Al2O319.2% CaO, 12% NA2O, 2% K2O, 4.7% li2O, 3% CAF21% Zro23% B2O30.1% SB2O3Preparation of basic glass, 1350 ° C for 12 hours; (Lii);2O) / (NA2O + K2O) = 0.34, CAF2 / (Tio2+ Zro2) = 3;

[0049]S2, forming, annealing, cold processing;

[0050]S3, low temperature verification, high temperature crystallization, low temperature detection temperature is 650 ° C, the holding time is 0.5 h, the high temperature crystallization temperature is 950 ° C, the holding time is 0.5 h;

[0051]S4, two-step chemistry strengthening: first 85% nano3+ 15% KNO3350 ° C in a composite melting salt for 12 h, then 10% nano3+ 90% KNO3The composite melting salt was soaked in 480 ° C for 0.5 h.

Embodiment 2

[0053]S1, weigh the raw material as various components, select the corresponding oxide, hydroxide, carbonate, nitrate, fluoride, chloride, hydroxide, and spermatic compounds, etc., according to the following weight percentage: 63% SiO21% Al2O315% CaO, 6% NA2O, 2% K2O, 3% li2O, 3% CAF21% Zro23% B2O31% TIO20.5% SB2O3, 1.5% P2O5Preparation of base glass, 1450 ° C for 6 hours, molten; "where (Lii2O) / (NA2O + K2O) = 0.38, CAF2 / (Tio2+ Zro2) = 1.5;

[0054]S2, forming, annealing, cold processing;

[0055]S3, low temperature nucleation, high temperature crystallization, low temperature calibration temperature of 500 ° C, the holding time is 12 h, the high temperature crystallization temperature is 730 ° C, the holding time is 12 h;

[0056]S4, two-step chemistry strengthening: first 85% nano3+ 15% KNO3350 ° C in a composite melting salt for 12 h, then 10% nano3+ 90% KNO3The composite melting salt was soaked in 480 ° C for 0.5 h.

Embodiment 3

[0058]S1, weigh the raw material as various components, select the corresponding oxide, hydroxide, carbonate, nitrate, fluoride, chloride, hydroxide, and spermatic compounds, etc., according to the following weight percentage: 50% SIO21% Al2O320% CaO, 6% NA2O, 6% K2O, 5% li2O, 3% CAF22% Zro23% B2O30.1% SB2O30.9% Y2O33% P2O5Preparation of basic glass, 1350 ° C for 12 hours; (Lii);2O) / (NA2O + K2O) = 0.42, CAF2 / (Tio2+ Zro2) = 1.5;

[0059]S2, forming, annealing, cold processing;

[0060]S3, low temperature nucleation, high temperature crystallization, low temperature calibration temperature of 600 ° C, the holding time is 3 h, the high temperature crystallization temperature is 800 ° C, the holding time is 4 h;

[0061]S4, two-step chemistry strengthening: first 85% nano3+ 15% KNO3400 ° C for 15 h in a composite melting salt, then 10% nano3+ 90% KNO3Soak 480 ° C in a composite melting salt for 4 h.

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Abstract

The invention relates to the technical field of glass ceramics, and provides high-fracture-toughness microcrystalline glass for a mobile phone backboard. The glass comprises the following components in percentage by mass: 30-60% of primary crystal phase which is silicalite, 5-10% of secondary crystal phase which is one or two of xonotlite and calcium fluoride, and the balance of glass phase. The glass comprises the following components in percentage by mass: 50 to 63 percent of SiO2, 1 to 5 percent of Al2O3, 15 to 20 percent of CaO, 6 to 12 percent of Na2O, 2 to 6 percent of K2O, 3 to 5 percent of Li2O, 3 to 6 percent of CaF2, 0 to 2 percent of TiO2, 1 to 3 percent of ZrO2, 0 to 3 percent of Y2O3, 3 to 7 percent of B2O3, 0 to 3 percent of P2O5 and 0.1 to 0.5 percent of Sb2O3. According to the technical scheme, the problem that microcrystalline glass in the prior art cannot have fracture toughness and chemical strengthening property at the same time is solved.

Description

Technical field[0001]The present invention relates to the field of microcrystalline glass techniques, and in particular, a high-breaking toughness microcrystalline glass for a mobile phone backplane and a preparation method thereof.Background technique[0002]With the arrival of the 5G era, as an important communication tool smartphone has become an essential part, and the glass / glass ceramic material is one of the indispensable components in these electronic devices. It is well known that the current aluminosilicate high-strength glass has a very important position on smartphone cover materials, while the phone backplane is also protected by important components. In recent years, the demand for 5G communication and wireless charging technologies has been, in order to reduce the electromagnetic shielding effect generated by the front metal material backplane, high-intensity glass / microcrystalline glass material is considered a strong competition for mobile rear cover materials. Be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/00C03C21/00C03B32/02
CPCC03C10/0009C03B32/02C03C21/002
Inventor 彭志钢袁坚郑伟宏杜晓欧张茂森刘皓薛瑞峰史连莹陈晖
Owner GLASS TECH RES INST OF SHAHE CITY OF HEBEI PROVINCE
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