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New method for preparing monoclinic structure ZnZrNb2O8 microwave dielectric ceramic through low temperature sintering

A technology of microwave dielectric ceramics and sol-gel method, which is applied in the field of nZrNb2O8 microwave dielectric ceramics, can solve the problems of unfavorable ceramic sintering, large particle size of powder synthesized at temperature, etc., and achieve good microwave dielectric properties, single phase, and high activity. Effect

Inactive Publication Date: 2014-04-09
UNIV OF JINAN
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Problems solved by technology

[0004] The purpose of this invention is to overcome the high temperature of traditional solid-phase synthesis powder, The particle size of the synthesized powder is large, which is not conducive to the subsequent sintering of ceramics; a method for finely synthesizing ternary ZnZrNb2O8 microwave dielectric ceramics by sol-gel method is provided , using the sol-gel method to finely synthesize monoclinic structure ZnZrNb2O8 ceramic powder, with low synthesis temperature, uniform ceramic particles (about 30nm), good dispersion, Pure phase, powder with nano-particle size and high specific surface energy, showing significant advantages such as high activity, can achieve low temperature sintering, and maintain its good microwave dielectric properties, meeting the needs of LTCC applications

Method used

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  • New method for preparing monoclinic structure ZnZrNb2O8 microwave dielectric ceramic through low temperature sintering
  • New method for preparing monoclinic structure ZnZrNb2O8 microwave dielectric ceramic through low temperature sintering
  • New method for preparing monoclinic structure ZnZrNb2O8 microwave dielectric ceramic through low temperature sintering

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] according to figure 1 Preparation of ZnZrNb by Sol-Gel Process 2 o 8 Ceramic process flow diagram with the following steps:

[0038] 1) Prepare the aqueous citric acid solution of Zr and Zn ions

[0039] (a) According to ZnZrNb 2 o 8 The stoichiometric ratio of the microwave ceramic phase, adjust ZnO (or Zn(NO 3 ) 2 .6H 2 O) / Zr(NO 3 ) 4 ·5H 2 O / Nb 2 o 5 The molar ratio is 1+x / 1 / 1 (03 ) 2 .6H 2 O is 9.0139 grams, weigh 0.03mol of Zr(NO 3 ) 4 ·5H 2 A total of 12.8772 grams of O, dissolved in 200ml of ionized water, magnetically stirred to form a transparent solution;

[0040] (b) take by weighing 34.5852 grams of citric acid, add in the above-mentioned solution and stir, impel citric acid to form a complex with Zr, Zn ion, make transparent Zn and Zr ion citric acid aqueous solution;

[0041] 2) prepare the aqueous citric acid solution of Nb ion

[0042] (a) According to ZnZrNb 2 o 8 The stoichiometric ratio of the microwave ceramic phase, weigh 7.97...

Embodiment 2

[0052] according to figure 1 Preparation of ZnZrNb by Sol-Gel Process 2 o 8 Ceramic process flow diagram with the following steps:

[0053] 1) Prepare the aqueous citric acid solution of Zr and Zn ions

[0054] (a) According to ZnZrNb 2 o 8 The stoichiometric ratio of the microwave ceramic phase, adjust ZnO (or Zn(NO 3 ) 2 .6H 2 O) / Zr(NO 3 ) 4 ·5H 2 O / Nb 2 o 5 The molar ratio is 1+x / 1 / 1 (03 ) 2 .6H 2 O is 9.37 grams, weigh 0.03mol of Zr(NO 3 ) 4 ·5H 2 A total of 12.8772 grams of O, dissolved in 200ml of ionized water, magnetically stirred to form a transparent solution;

[0055] (b) take by weighing 57.642 grams of citric acid, add in the above-mentioned solution and stir, impel citric acid to form a complex with Zr, Zn ion, make transparent Zn and Zr ion citric acid aqueous solution;

[0056] 2) prepare the aqueous citric acid solution of Nb ion

[0057] (a) According to ZnZrNb 2 o 8 The stoichiometric ratio of the microwave ceramic phase, weigh 7.974 g...

Embodiment 3

[0067] according to figure 1 Preparation of ZnZrNb by Sol-Gel Process 2 o 8 Ceramic process flow diagram with the following steps:

[0068] 1) Prepare the aqueous citric acid solution of Zr and Zn ions

[0069] (a) According to ZnZrNb 2 o 8 The stoichiometric ratio of the microwave ceramic phase, adjust ZnO (or Zn(NO 3 ) 2 .6H 2 O) / Zr(NO 3 ) 4 ·5H 2 O / Nb 2 o5 The molar ratio is 1+x / 1 / 1 (03 ) 2 .6H 2 O is 9.1924 grams, weigh 0.03mol of Zr(NO 3 ) 4 ·5H 2 A total of 12.8772 grams of O, dissolved in 200ml of ionized water, magnetically stirred to form a transparent solution;

[0070] (b) take by weighing 46.1136 grams of citric acid, add in the above-mentioned solution and stir, impel citric acid to form a complex with Zr, Zn ion, make transparent Zn and Zr ion citric acid aqueous solution;

[0071] 2) prepare the aqueous citric acid solution of Nb ion

[0072] (a) According to ZnZrNb 2 o 8 The stoichiometric ratio of the microwave ceramic phase is to weigh 7...

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Abstract

The invention belongs to the technical field of electronic ceramic preparation and application, and particularly relates to a method for fine synthesis of a ternary monoclinic structure ZnZrNb2O8 microwave dielectric ceramic by using a sol-gel method. The technical scheme comprises adopting a sol-gel method to finely synthesize a ternary monoclinic structure ZnZrNb2O8 microwave dielectric ceramic, and specifically comprises: 1) preparing a citric acid aqueous solution of Zn ions and Zr ions; 2) preparing a citric acid aqueous solution of Nb ions; and 3) synthesizing a ternary ZnZrNb2O8 nanometer precursor, and preparing the dielectric ceramic. The ternary monoclinic structure ZnZrNb2O8 microwave dielectric ceramic has significant advantages of low synthesis temperature, uniform ceramic particles, good ceramic particle dispersity, pure phase, nano-scale powder (particle size of about 30 nm), high specific surface energy, high activity and the like. In addition, compared with the conventional solid-phase method, the method of the present invention has the following characteristics that: the sintering temperature can be significantly reduced by 100-200 DEG C so as to achieve low temperature sintering, maintain the good microwave dielectric property, and meet the LTCC application requirements.

Description

technical field [0001] The invention belongs to the technical field of preparation and application of electronic ceramics, in particular to a finely synthesized ternary ZnZrNb with a monoclinic structure using a wet chemical process. 2 o 8 Microwave dielectric ceramic method. Background technique [0002] LTCC low-temperature co-fired ceramic technology is a new material technology developed by Hughes Corporation in 1982. It uses thick film materials, and according to the pre-designed structure, electrode materials, substrates, electronic devices, etc. are fired at one time. High-integration, high-performance circuit packaging technology, its main application areas are: high-frequency wireless communication (such as mobile phones, global satellite positioning systems and Bluetooth technology, etc.), aerospace industry and military fields (such as communication satellites, detection and tracking radar systems, etc.), micro-electromechanical systems and sensing technology, a...

Claims

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Application Information

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IPC IPC(8): C04B35/495C04B35/624C04B35/626
Inventor 吴海涛杨长红胡广达
Owner UNIV OF JINAN
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