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Low-temperature co-sintered ceramic microwave and millimeter wave dielectric powder

A low-temperature co-fired ceramic and millimeter-wave technology, applied in the field of low-temperature co-fired ceramic microwave and millimeter-wave dielectric powder, can solve the problems of reduced quality factor and increased loss.

Active Publication Date: 2019-08-27
SYNERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the biggest difficulty in this development is that the matching of the glass is very important. If there is no way to develop a suitable matching glass, the amount of glass needs to be added to more than 30-40wt% to effectively sinter and compact, and the amount of glass increases. , the loss will still increase and the quality factor will decrease

Method used

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  • Low-temperature co-sintered ceramic microwave and millimeter wave dielectric powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] When 1-x-ywt%Zn 2 SiO 4 Ceramic material mixed with 1wt% CaTiO 3 and 1-10wt% SrTiO 3 Compound with 8wt% Li 2 O-MgO-B 2 o 3 -SiO 2 When the glass is sintered at 800℃, it can be found that the ceramics are dense after sintering, the range of dielectric constant is 6.2-10.3, the quality factor is 27,123GHz to 28,109GHz, the temperature frequency coefficient is -28 to -54ppm / ℃, the temperature capacitance The coefficient is 56 to 107ppm / ℃, and the insulation resistance reaches 1.2×10 12 to 6.9×10 12 Ω, material and suitable for co-firing with silver.

Embodiment 2

[0055] When 1-x-ywt%Zn 2 SiO 4 Ceramic material mixed with 4wt% CaTiO 3 and 1-10wt% SrTiO 3 Compound with 8wt% Li 2 O-MgO-B 2 o 3 -SiO 2 When the glass is sintered at 800℃, it can be found that the ceramics are dense after sintering, the range of dielectric constant is 7.1-9.8, the quality factor is 26,112GHz to 26,567GHz, the temperature frequency coefficient is -17 to -32ppm / ℃, the temperature capacitance The coefficient is 34 to 64ppm / ℃, and the insulation resistance reaches 3.1×10 12 to 7.2×10 12 Ω, material and suitable for co-firing with silver.

Embodiment 3

[0057] When 1-x-ywt%Zn 2 SiO 4 Ceramic material mixed with 7wt% CaTiO 3 and 1-10wt% SrTiO 3 Compound with 8wt% Li 2 O-MgO-B 2 o 3 -SiO2 When the glass is sintered at 800°C, it can be found that the ceramics are dense after sintering, the range of dielectric constant is 7.3-10.1, the quality factor is 25,678GHz to 26,142GHz, the temperature frequency coefficient is 0 to -3ppm / °C, and the temperature capacitance coefficient 1 to 6ppm / ℃, insulation resistance up to 3.2×10 12 to 8.1×10 12 Ω, material and suitable for co-firing with silver.

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Abstract

The invention discloses low-temperature co-sintered ceramic microwave and millimeter wave dielectric powder. After a CaTiO3 ceramic material and a SrTiO3 ceramic material are added to a Zn2SiO4 ceramic material and then a Li2O-MgO-B2O3-SiO2 glass material is added, Li2O-MgO-B2O3-SiO2 glass has high stability and cannot have reaction with water or alcohol or adhesives or other high-molecular materials, and therefore no gel effect can be generated; in addition, the Li2O-MgO-B2O3-SiO2 glass only has the liquid-phase sintering characteristic with a Zn2SiO4+CaTiO3+SrTiO3 ceramic material, and the material system meets the requirement for the low-temperature co-sintered ceramic preparing temperature and can be sintered to be compact at the temperature of 800-900 DEG C. The material has the highquality factor Qf larger than 20 thousand GHz and the temperature frequency coefficient smaller than 30 ppm / DEG C under the microwave and millimeter wave characteristics at the frequency of 1-100 GHzand the dielectric constant of 6-13 and can be effectively co-sintered in the atmospheric environment and a noble metal electrode (silver) and applied to microwave dielectric components.

Description

technical field [0001] The invention relates to a low-temperature co-fired ceramic technology to manufacture microwave dielectric materials, in particular to a low-temperature co-fired ceramic microwave and millimeter wave dielectric powder. Background technique [0002] The development of low temperature co-fired ceramic technology (Low temperature co-fired ceramic, LTCC) is mainly used in ceramic materials that can be co-fired with silver electrodes at a low temperature ≤ 900 degrees, and after co-fired, it can be made into multilayer ceramics ( Multi-layer co-firedceramics, MLCC) structure of electronic ceramic components, generally speaking, the sintering temperature of ceramic materials is quite high, so if you want to reduce the sintering temperature, there are usually several ways, including <1> glass matrix Adding ceramics, <2> glass ceramics, <3> ceramics doped with glass or low melting point oxides, the introductions are as follows: [0003] <...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/16
CPCC04B35/16C04B2235/3236C04B2235/3284C04B2235/365C04B2235/408
Inventor 金雷张春芹孔维彬谷书峰宋康
Owner SYNERGY TECH
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