LTCC ceramic material as well as preparation method and application thereof

Abstract

The invention discloses an LTCC ceramic material as well as a preparation method and application thereof. The LTCC ceramic material disclosed by the invention comprises the following components in percentage by mass: 30 to 40 percent of KBS glass powder and 60 to 70 percent of spherical SiO2. By adding the spherical SiO2, the dielectric constant of the LTCC is effectively reduced, so that the dielectric constant of the material is as low as 3.7, and the dielectric loss is as low as 0.2%; the sphericity degree of the spherical SiO2 is greater than or equal to 98%, and the spherical SiO2 is graded by SiO2 with three particle sizes, so that the sintering compactness of the material is improved, and the porosity of a sintered ceramic body is as low as 0.09%. The LTCC ceramic material disclosed by the invention has the advantages of ultralow dielectric constant, low loss and good compactness, and is suitable for the fields of high-frequency communication and radio frequency.

Description

technical field [0001] The invention relates to the technical field of electronic ceramic materials, in particular to an LTCC ceramic material and a preparation method and application thereof. Background technique [0002] With the advent of 5G communication and the era of Internet of Everything, high-frequency applications have become a trend. In order to reduce signal transmission loss and speed up signal transmission rate, low dielectric constant LTCC ceramic materials have received more and more attention. The widely used low dielectric ceramic powder is mostly made of glass + Al 2 o 3 system material, due to Al 2 o 3 The dielectric constant is relatively high (9-11), and the dielectric constant of existing material systems is generally higher than 5.0. It is difficult to further reduce the dielectric constant of porcelain powder. Although the method of increasing the proportion of glass in the system can effectively reduce the dielectric constant, the excessive add...

AI Technical Summary

Problems solved by technology

The widely used low dielectric ceramic powder is mostly made of glass+Al2O3 system material, because Al2O3The dielectric constant is high (9~11), the dielectric constant of the existing material system is generally higher than 5.0, and it is difficult to further reduce the dielectric constant of ceramic powder

Although the method of increasing the proportion of glass in the system can effectively reduce the dielectric constant, the excessive addition of glass will lead to more pores in the sintered ceramics, which greatly reduces the reliability of the ceramics

In the previous patent CN201910155188X, a material was disclosed, adding SiO2 to the glass+Al2O3 system to reduce the Dielectric constant and improve density, but in this method, the minimum dielectric constant can only reach 4.3, and the minimum porosity can only reach 0.11%, which is difficult to further reduce

The dielectric constant of the organic-inorganic composite ceramic material under development can be as low as 4 or less, but the temperature resistance of organic polymers is poor, and it does not match the current LTCC integration process and cannot meet the needs of high-density integration

Images