Low-dielectric constant microwave ceramic dielectric material and preparation method thereof

A technology of microwave ceramics and dielectric materials, applied in ceramics, inorganic insulators, etc., can solve the problems of low dielectric constant, inability to manufacture microwave dielectric devices, small Q f value, etc., and achieve the effect of excellent dielectric properties

Inactive Publication Date: 2012-09-12
XIAMEN SUNYEAR ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the frequency range of mobile communication is 800-2000MHz, and the corresponding microwave dielectric devices tend to be mature. Large (εr≥20) and small Q f value, it is imposs

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  • Low-dielectric constant microwave ceramic dielectric material and preparation method thereof
  • Low-dielectric constant microwave ceramic dielectric material and preparation method thereof
  • Low-dielectric constant microwave ceramic dielectric material and preparation method thereof

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Embodiment Construction

[0014] A microwave ceramic dielectric material with a low dielectric constant εr=3~8 and its preparation method described in the present invention will be further described below in combination with examples according to the above-mentioned content of the invention.

[0015] (1) To analyze the pure raw material BaCO 3 、TiO 2 , Mg(OH) 2 , SiO 2 According to the composition ratio in Table 1, according to the preparation process of the main material described in 1 of the Summary of the Invention, (1-X)Mg was prepared after ball milling, drying, pre-calcination, crushing, filtration, etc. 2 SiO 4 -XBaTiO 3 .

[0016] Table 1 Main material (1-X) Mg 2 SiO 4 -XBaTiO 3 Example recipe of

[0017]

[0018] (2) According to the composition of Table 2, the main material is (1-X) Mg 2 SiO 4 -XBaTiO 3 , where X=0.001~0.25 add analytically pure SrCO 3 , ZrO 2 、 Ta 2 o 5 , Nb 2 0 5 , MnO 2 , CaO, La 2 o 3 、WO 3 、 Bi 2 o 3 , B 2 o 3 、Al 2 o 3 , ZnO, SiO 2 , addi...

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Abstract

This invention provides a microwave ceramic dielectric material with a low dielectric constant [epsilon]r of 3-8 and a preparation method thereof, and the material is composed of (1-X)Mg2SiO4-XBaTiO3 as a main component, a modification adulterant and a sintering promoter. 1) The said major constituent is a (1-X)Mg2SiO4-XBaTiO3 solid solution, wherein the X=0.001-0.25; 2) The said modification adulterant comprises one or a mixture of more than one of SrCO3, ZrO2, Ta2O5, Nb205, MnO2, CaO, La2O3 and WO3; 3) The said sintering promoter comprises low-melting oxides such as Bi2O3, B2O3, ZnO, SiO2, Al2O3 and Nb2O5,and one or more kinds of the glass powder with a low melting point. After reasonably reasonable formulation, optimizing synthesis and ball milling, the microwave medium material prepared from the method can be sintered at a relatively low temperature of 1340 DEG C to 1380 DEG. C.A microwave capacitor made by this method has an excellent dielectric property: [epsilon]r=3-8>Qf) 60000GHZ, [epsilon] f(-40DEG C. -25DEG C./25 DEG C-125 DEG C)<=20PPM/DEG C.

Description

technical field [0001] The invention relates to a low dielectric constant εr=3~8 microwave ceramic dielectric material and a preparation method thereof. Background technique [0002] Microwave dielectric ceramics refer to ceramics that are used as dielectric materials in microwave frequency (mainly UHF, SHF frequency) circuits and perform one or more functions. They are widely used as resonators, filters, and dielectric substrates in modern communications. Chips, dielectric antennas, dielectric waveguide loops, etc. Compared with metal cavity resonators, microwave dielectric resonators have the advantages of small size, light weight, good temperature stability, and low price. [0003] With the rapid development of microwave communication, microwave communication systems urgently need high-performance microwave dielectric devices. At present, the frequency range of mobile communication is 800-2000MHz, and the corresponding microwave dielectric devices tend to be mature. La...

Claims

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Application Information

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IPC IPC(8): C04B35/20C04B35/622H01B3/12
Inventor 邹海雄张军志林康李太坤
Owner XIAMEN SUNYEAR ELECTRONICS CO LTD
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