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Dielectric adjustable low-temperature co-fired composite microwave ceramic material and preparation method thereof

A technology of low-temperature sintered ceramics and microwave ceramics, which is applied in the direction of ceramics and inorganic insulators, can solve the problems of no dielectric adjustable characteristics and low dielectric constant, achieve high dielectric adjustable characteristics, low sintering temperature, and broaden applications range effect

Inactive Publication Date: 2008-04-23
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, most of the ceramic powders for LTCC developed at home and abroad are ordinary powders, which are applied to LTCC substrate materials, have no dielectric adjustable characteristics, and the dielectric constant is relatively low (ε r ≤50), there are few reports on microwave dielectric materials and their preparation methods with both dielectric tunable properties and low-temperature co-firing properties

Method used

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  • Dielectric adjustable low-temperature co-fired composite microwave ceramic material and preparation method thereof
  • Dielectric adjustable low-temperature co-fired composite microwave ceramic material and preparation method thereof

Examples

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preparation example Construction

[0028] xB provided by the present invention 2 o 3 ·yLi 2 O glass doped with Ba 1-x Sr x TiO 3 -M 2 TiO 4 (M=Mg, Zn) the preparation method of low-temperature co-fired composite microwave ceramics specifically comprises the following steps:

[0029] (1) Using the traditional electronic ceramic powder preparation process, through the solid-state reaction method, select BaTiO 3 and SrTiO 3 (99.9%, 100nm, provided by Shandong Guoteng Functional Ceramic Material Co., Ltd.) as the main raw material, according to a certain Ba / Sr molar ratio ingredients, the prepared raw materials are placed in a nylon ball mill jar, and zirconia balls and absolute ethanol or Ball mill with deionized water for 24 hours, dry the discharged material and pre-calcine at 1100°C for 4 hours, and get Ba (1-x) Sr x TiO 3 (x=0.3~0.6) powder for later use.

[0030] (2) According to xB 2 o 3 ·yLi 2 The B / Li molar ratio relationship of O glass, respectively weigh the HBO of the corresponding B / Li m...

Embodiment 1

[0036] Example 1 Ba 1-x Sr x TiO 3 preparation of

[0037] First, according to Ba 1-x Sr x TiO 3 The stoichiometric ratio, weigh the corresponding weight of BaTiO 3 and SrTiO 3 Put the powder in different nylon ball milling tanks, add zirconia balls and absolute ethanol, mill for 24 hours, and pre-calcine at 1100°C for 4 hours after discharging, and get Ba 1-x Sr x TiO 3 , BaTiO involved in the reaction 3 and SrTiO 3 The weight (g) of and corresponding reaction product obtained are listed in table 1:

[0038] Table 1

[0039] product

Embodiment 2

[0040] Example 2xB 2 o 3 ·yLi 2 Preparation of O glass powder

[0041] According to xB 2 o 3 ·yLi 2 The B / Li molar ratio relationship in O glass, respectively weigh the HBO with the same B / Li molar ratio relationship 3 and Li 2 CO 3 Place in an alumina crucible, slowly raise the temperature to 1000°C and keep it warm for 30 minutes, and the xB that has formed a liquid phase 2 o 3 ·yLi 2 O glass water is rapidly quenched to obtain xB 2 o 3 ·yLi 2 After the glass body is ground, pass through a 200-mesh sieve to prepare xB 2 o 3 ·yLi 2 O glass powder is ready for use, HBO participating in the reaction 3 and Li 2 CO 3 The weight (g) and the corresponding reaction product obtained are listed in Table 2: Table 2

[0042] product

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Abstract

This invention discloses an adjustable dielectric constant, low temperature sintered and composite microwave ceramic material. The components, based on the total weight percentages, are: Bal-xSrxTiO(x=0.3-0.6) being 20.0-97.5%, M2TiO4(M=Mg or Zn)being 0.0-77.5%, xB2O3.yLi2O glass (x / y=0.5-1.0) being 2.5-15.0%. This invention also discloses the method for preparing said product. The advantages are adjustable dielectric constant and being low temperature sintered.

Description

technical field [0001] The invention belongs to the technical field of electronic materials and devices, and in particular relates to a composite microwave ceramic material with adjustable dielectric properties and low-temperature sintering properties and a preparation method thereof. Background technique [0002] With the rapid development of the electronic information industry, the development and application of electronic functional devices and microwave systems are moving toward miniaturization, functional modularization, application of high frequency and broadband, microelectronic circuit integration, chip design and low cost. direction of development. Therefore, the preparation technology of new functional microwave ceramic materials and chip components has become a major research hotspot today. Composite microwave ceramics with dielectric tunability and low-temperature sintering characteristics are the key materials for tunable microwave components such as electrical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/462C04B35/468C04B35/47C04B35/622H01B3/12
Inventor 翟继卫丑修建姜海涛王思维
Owner TONGJI UNIV
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