A kind of glass-ceramic and chemically strengthened glass-ceramic and application thereof

A glass-ceramic and chemical technology, applied in the field of glass-ceramics, can solve problems such as low magnetic loss, use, and large magnetic loss.

Active Publication Date: 2021-08-10
GLASS TECH RES INST OF SHAHE CITY OF HEBEI PROVINCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

5G communication technology will increase the transmission signal to a higher frequency. If a metal back cover is used, it will seriously affect the transmission of the signal
Although the problem of poor color balance is solved, and sufficient compressive stress value can be obtained through ion exchange process, it still cannot form a deep stress layer, which makes it easy to be damaged during the falling process, and cannot be used as a front cover or back of a mobile phone. cover use
[0007] CN107963815A discloses a glass-ceramic, which has relatively high thermal conductivity and strength, but for the back cover used for 5G mobile communication terminals involved, it requires high wireless charging technology, and low magnetic loss is not considered However, its mechanical properties, transmittance, and magnetic properties cannot meet the requirements of 5G mobile communication and wireless charging technology for back cover materials.
[0008] Therefore, in the existing comparable inventions, there are usually the following problems: low mechanical properties, poor impact resistance, unable to meet the development needs of mobile terminals; low visible light transmittance, low hardness, not resistant to scratches, not It is suitable for the front cover protection component; the magnetic loss is large and the magnetic performance is poor, and it is not suitable for the rear cover protection component and 5G communication technology; the viscosity of the basic glass is high, it is difficult to form, the productivity is low, the cost is high, and it is difficult For mobile terminal front or back cover

Method used

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  • A kind of glass-ceramic and chemically strengthened glass-ceramic and application thereof

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Experimental program
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Effect test

Embodiment 1

[0050] A kind of glass ceramics, in terms of mass percentage of oxide, the composition of the glass ceramics is SiO 2 50%, Al 2 o 3 15.5%, Na 2 O 14%, K 2 O 2%, MgO 13.2%, ZrO 2 2%, P 2 o 5 4.3%. The glass-ceramic of this embodiment can be used as a high-transparency and high-strength basic glass-ceramic for the front cover of a 5G communication mobile terminal. The light transmittance of a sample with a thickness of 1mm and a wavelength of 550nm is 92%. The microhardness is 5.7GPa, the four-point bending strength is 180Mpa, and the fracture toughness is K IC Up to 0.6MPa·mm 0.5 .

Embodiment 2

[0052] A kind of glass ceramics, in terms of mass percentage of oxide, the composition of the glass ceramics is SiO 2 48.2%, Al 2 o 3 20.6%, Na 2 O 13.5%, K 2O 1%, MgO 7.5%, ZrO 2 2%, Li 2 O3.7%, P 2 o 5 1.5%, Sb 2 o 3 1%, RbO 2 1%. The glass-ceramic of this embodiment can be used as a high-transparency and high-strength basic glass-ceramic for the front cover of a 5G communication mobile terminal. The light transmittance of a 1mm-thick sample at a wavelength of 550nm is 91.5%, the microhardness is 5.9GPa, the four-point bending strength is 160Mpa, and the fracture toughness is K IC Up to 0.8MPa·mm 0.5 .

Embodiment 3

[0054] A kind of glass ceramics, in terms of mass percentage of oxide, the composition of the glass ceramics is SiO 2 70%, Al 2 o 3 10%, Na 2 O 8%, K 2 O 2%, MgO 2%, TiO 2 4%, ZnO 1%, Eu 2 o 3 1%, P 2 o 5 1%, Fe 2 o 3 1%. The glass-ceramic of this embodiment can be used as the base glass-ceramic of high strength and low magnetic loss for the back cover of a 5G communication mobile terminal, with a microhardness of 5.6GPa, a four-point bending strength of 163Mpa, and a fracture toughness of K IC Up to 0.6MPa·mm 0.5 ; For 7GHz high-frequency communication electromagnetic wave loss coefficient is 18dB / cm, magnetic susceptibility is 3.5×10 -9 m 3 / mol, the magnetic moment is 5.6×10 -24 J / T.

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Abstract

A glass-ceramic and chemically strengthened glass-ceramics and applications thereof, belonging to the technical field of glass-ceramics, the components of the glass-ceramics are calculated by mass percentage of oxides, including SiO 2 45~75%, Al 2 o 3 10-25%, Na 2 O 8~20%, K 2 O 1~4%, MgO 0~20%, ZrO 2 0~20%, Li 2 O 0~5%, TiO 2 0-8%, ZnO 0-10%, Eu 2 o 3 0~3%, P 2 o 5 0~5%, Sb 2 o 3 0~3%, Fe 2 o 3 0~5%. The present invention is suitable for protective components such as portable electronic equipment and optical equipment of 5G mobile communication terminals. Through glass composition design, a front cover glass-ceramic material with high visible light transmittance and high strength and hardness is obtained, and has High strength, low magnetic loss glass-ceramic material for the back cover.

Description

technical field [0001] The invention belongs to the technical field of glass-ceramics, and relates to applications in 5G communication mobile terminals or other glass application occasions that require antimagnetism, light transmittance, and strength. Background technique [0002] On the portable electronic equipment of communication mobile terminal, glass material is usually used as the front cover to play a corresponding protective role. However, as the size of the display screen of the mobile terminal increases day by day, the glass front cover becomes more and more easy to break. The mechanical properties of the existing high-alumina glass can no longer meet the needs of the development of mobile terminals. [0003] In addition, the back cover of the mobile terminal usually uses a metal material as the back cover. With the development of communication technology, 5G communication will soon become the mainstream of the industry. 5G communication technology will increas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C10/00C03C21/00
CPCC03C10/0018C03C10/0045C03C21/001
Inventor 袁坚郑伟宏田培静彭志钢
Owner GLASS TECH RES INST OF SHAHE CITY OF HEBEI PROVINCE
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