Ceramic material and preparation method thereof

Abstract

The invention discloses a ceramic material and a preparation method thereof, and belongs to the technical field of electronic functional materials and devices. The ceramic material is prepared by the following steps: mixing a main crystalline phase material and a doping phase material through ball milling, then subjecting the mixture to dry pressing and moulding, and finally sintering. The ceramic material comprises the following components in percentage by weight: 85 to 97% of MgSiO3, 1 to 8% of borosilicate glass, 1 to 3% of Al2O3, 0.5 to 2% of ZnO, and 0.5 to 2% of La2O3; wherein the MgSiO3 is the main crystalline phase, and the doping phase comprises borosilicate glass, Al2O3, ZnO, and La2O3. Compared with the similar ceramic material in the prior art, the provided ceramic material has excellent properties: the ceramic-forming density (rho) is larger than 2.7 g / cm3, the dielectric constant [epsilon]<r> is low (less than 7.0), and the flexure strength is high (higher than 150 MPa). The preparation method has the advantages of simple technology, low price, and good production repeatability. The low-cost, massive, and stable production of MgSiO3 ceramic substrate material becomes possible.

Description

technical field [0001] The invention belongs to the technical field of electronic information functional materials and devices, and specifically relates to a ceramic substrate material with low dielectric constant, high ceramic density, high bending strength and high body resistance. It can be used to make components such as circuit substrates, ceramic dielectric substrates, dielectric filters, and dielectric antennas in modern electronics and communication technologies. Background technique [0002] Due to the strong demand in the consumer electronics market, higher technical requirements are constantly being put forward, such as high-speed information transmission, integrity, multi-functionality and miniaturization of products. In traditional electronic product applications, most of the application frequencies are concentrated below 1GHz, and PCB and terminal manufacturers designers tend to ignore the negative impact of the high dielectric constant of the substrate materia...

AI Technical Summary

Problems solved by technology

[0006] Common magnesia porcelain is mostly made of mineral materials, with many miscellaneous phase components, and MgSiO 3 There will be a phase change, MgSiO 3 There are four isomers, Proto-enstatile (enstatite) is a high-temperature form, has good mechanical strength and low thermal expansion coefficient, and is commonly used on circuit substrates; Ortho-enstatile (orthogonal pyroxene), Clino- enstaticile (monoclinopyroxene) and Monoclinicamphibole (monoclinic amphibole) are MgSiO 3 low-temperature form; orthorhombic pyroxene (α-MgSiO 3 ) and monoclinic pyroxene (β-MgSiO 3 ) is interactively transformed, compared to Mg 2 SiO 4 Ceramic, MgSiO 3 Ceramics have a lower dielectric constant, but have poor sinterability and are difficult to densify

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