Mg-Al-Si spinelle crystallized glass

A technology of glass-ceramics and spinel, which is applied in glass furnace equipment, glass manufacturing equipment, manufacturing tools, etc., can solve the problems of high performance requirements of zirconia powder, insufficient strength and hardness, and low yield rate of products. Achieve the effect of light weight, low cost and superior dielectric properties

Inactive Publication Date: 2019-05-28
温州市康尔微晶器皿有限公司
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  • Application Information

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Problems solved by technology

[0010] In addition, the disadvantages of the glass back cover are also very obvious. Its thermal conductivity is not good, its strength and hardness are not enough (Mohs hardness is lower than 7), it is fragile and easy to crack, and its drop resistance is weak, and it is easy to leave large areas of irreversible scars; The zirconia ceramic back cover has many problems such as high performance requirements for zirconia powder, insufficient production capacity, and high price; moreover, zirconia ceramics need to go through nano-scale powder preparation, slurry, granulation, molding, sintering, and post-processing And other manufacturing processes, the process is long and complicated, resulting in low product yield, and its proportion is relatively large

Method used

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  • Mg-Al-Si spinelle crystallized glass
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  • Mg-Al-Si spinelle crystallized glass

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Embodiment Construction

[0033] Attached below Figure 1-3 The present invention is further illustrated by the various examples in the table of examples and examples.

[0034]A magnesium-aluminum-silicon spinel glass-ceramic, which uses magnesium-aluminum spinel as the main crystal phase, and can be mainly used for ultra-thin white spinel glass-ceramics for smart 5G mobile phone back covers. Its basic components are composed of SiO2, Al2O3, MgO, TiO2, ZrO2, P2O5, Li2O and Na2O or K2O, plus clarifier Sb2O3. The composition of the glass-ceramics of the present invention is by weight percent: Al2O3 20-45wt%, SiO225-60wt%, MgO8-18wt%, TiO23-10wt%, ZrO20-5wt%, P2O50-3wt%, Li2O 0-2wt%, Na2O0~2wt%, K2O0~2wt%, Sb2O30.5-3wt%.

[0035] SiO2, Al2O3, and MgO have certain composition ranges in the glass-ceramic with magnesium-aluminum spinel as the main crystal phase. According to its three-phase diagram and comprehensive analysis of its melting and main crystal phase, the content of SiO2 is limited to 25-60wt%...

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Abstract

The invention provides Mg-Al-Si spinelle crystallized glass, which is prepared from the following ingredients in percentage by weight: 20 to 45 weight percent of Al2O3, 25 to 60 weight percent of SiO2, 8 to 18 weight percent of MgO, 3 to 10 weight percent of TiO2, 0 to 5 weight percent of ZrO2, 0 to 3 weight percent of P2O5, 0 to 2 weight percent of Li2O, 0 to 2 weight percent of Na2O, 0 to 2 weight percent of K2O and 0.5 to 3 weight percent of Sb2O3. The product has the characteristics of high intensity, high hardness, dropping resistance, low expansion and excellent dielectric property.

Description

technical field [0001] The invention relates to the field of glass-ceramics, in particular to a magnesium-aluminum-silicate spinel glass-ceramics and a preparation method thereof. Background technique [0002] Glass-ceramics is a polycrystalline solid material formed by the controlled crystallization of specific glass components. It has both the structural characteristics and properties of glass and ceramics. It is a new type of inorganic non-metallic material that is developing and has broad application prospects. Spinel glass-ceramics is a kind of glass-ceramics with spinel as the main crystal phase. It has a low thermal expansion coefficient, good corrosion resistance, high mechanical strength, high hardness (Mohs hardness ~ 8), and resistance to corrosion. Good abrasion resistance, good thermal shock resistance, excellent dielectric properties and other excellent properties, can be used as circuit substrates, device casings, capacitor materials, solid-state lasers, etc.,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/02C03B5/16C03B25/00C03B32/02
Inventor 章锦明郭兴忠
Owner 温州市康尔微晶器皿有限公司
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