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Method for low-temperature fine synthesis of MgZrNb2O8 dielectric ceramic nano-powder having wolframite structure by wet chemical technology

A dielectric ceramic and fine technology, applied in the field of preparation and application of electronic ceramics, can solve the problems of low synthesis temperature and difficult synthesis, and achieve the effects of low synthesis temperature, good repeatability, and easy precision ion doping modification.

Inactive Publication Date: 2014-07-30
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of traditional solid-phase synthesis difficulties based on the application requirements of LTCC (Low Temperature Co-fired Ceramic) low temperature co-fired ceramic technology in the future; A method for finely synthesizing MgZrNb2O8 dielectric ceramic nano-precursor powder by sol-gel method, using sol-gel method to finely synthesize MgZrNb2O8 ceramic powder has low synthesis temperature, uniform ceramic particles (less than 100nm), good dispersion, pure phase, nano-sized powder and high specific surface energy, showing Significant advantages such as higher activity can achieve subsequent low-temperature sintering, which is expected to provide new candidate materials for meeting the needs of LTCC applications

Method used

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  • Method for low-temperature fine synthesis of MgZrNb2O8 dielectric ceramic nano-powder having wolframite structure by wet chemical technology
  • Method for low-temperature fine synthesis of MgZrNb2O8 dielectric ceramic nano-powder having wolframite structure by wet chemical technology
  • Method for low-temperature fine synthesis of MgZrNb2O8 dielectric ceramic nano-powder having wolframite structure by wet chemical technology

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] according to figure 1 Preparation of MgZrNb by Sol-Gel Process 2 o 8 The process flow chart of ceramic nano-precursor powder has the following steps:

[0034](1) prepare the citric acid aqueous solution of Zr, Mg ion

[0035] (a) According to MgZrNb 2 o 8 For the stoichiometric ratio of ceramic phases, adjust the molar ratio of Mg / Zr / Nb elements to 1 / 1 / 2+x, where x is: 03 ) 4 .5H 2 O total 10.1772 g, Mg(NO 3 ) 2 A total of 7.6923 grams, dissolved in 200ml of ionized water, magnetically stirred to form a colorless and transparent solution;

[0036] (b) take by weighing 25.9389 grams of citric acid, add in the above-mentioned solution and stir, impel citric acid to form a complex with Zr, Mg ion, make colorless transparent Zr, Mg ion citric acid aqueous solution;

[0037] (2) prepare the citric acid aqueous solution of Nb

[0038] (a) According to MgZrNb 2 o 8 For the stoichiometric ratio of the ceramic phase, weigh 8.054 grams of niobium oxide, place them i...

Embodiment 2

[0047] according to figure 1 Preparation of MgZrNb by Sol-Gel Process 2 o 8 The process flow chart of ceramic nano-precursor powder has the following steps:

[0048] (1) prepare the citric acid aqueous solution of Zr, Mg ion

[0049] (a) According to MgZrNb 2 o 8 For the stoichiometric ratio of the ceramic phase, adjust the molar ratio of Mg / Zr / Nb elements to 1 / 1 / 2+x, where x is: 03 ) 4 .5H 2 O total 10.1772 g, Mg(NO 3 ) 2 .6H 2 A total of 7.6923 grams of O was dissolved in 200ml of ionized water and magnetically stirred to form a colorless and transparent solution;

[0050] (b) take by weighing 37.468 grams of citric acid, add in the above-mentioned solution and stir, impel citric acid to form a complex with Zr, Mg ion, make colorless transparent Zr, Mg ion citric acid aqueous solution;

[0051] (2) prepare the citric acid aqueous solution of Nb

[0052] (a) According to MgZrNb 2 o 8 For the stoichiometric ratio of the ceramic phase, weigh 8.2935 grams of niobi...

Embodiment 3

[0061] (1) prepare the citric acid aqueous solution of Zr, Mg ion

[0062] (a) According to MgZrNb 2 o 8 For the stoichiometric ratio of the ceramic phase, adjust the molar ratio of Mg / Zr / Nb elements to 1 / 1 / 2+x, where x is: 03 ) 4 .6H 2 O total 3.3924 g, Mg(NO 3 ) 2 A total of 2.5641 grams, dissolved in 100ml of ionized water, magnetically stirred to form a colorless and transparent solution;

[0063] (b) take by weighing 9.607 grams of citric acid, add in the above-mentioned solution and stir, impel citric acid to form a complex with Zr, Mg ion, make colorless transparent Zr, Mg ion citric acid aqueous solution;

[0064] (2) prepare the citric acid aqueous solution of Nb

[0065] (a) According to MgZrNb 2 o 8 For the stoichiometric ratio of the ceramic phase, 2.7379 grams of niobium oxide were weighed, placed in a ceramic medium reactor, sealed after adding 30ml of hydrofluoric acid, and then subjected to high temperature 130°C hydrothermal treatment in an oven for ...

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Abstract

The invention belongs to the technical field of electronic ceramic preparation and application and especially relates to a method for low-temperature fine synthesis of MgZrNb2O8 dielectric ceramic nano-powder having a wolframite structure by a wet chemical technology. The method comprises the following steps of 1, preparing a Zr- and Mg-containing citric acid aqueous solution, 2, preparing an Nb-containing citric acid aqueous solution and 3, synthesizing an MgZrNb2O8 ceramic nano-precursor. The method utilizes low-price oxide and inorganic nitrate as raw materials and is free of expensive metal alkoxide. The MgZrNb2O8 dielectric ceramic nano-powder has a low synthesis temperature, uniform ceramic particles, good dispersibility and pure phases, is suitable for fine doping modification of various elements, has nanoparticle sizes less than 100nm, high specific surface energy and high activity, can realizes follow-up low-temperature sintering and can satisfy LTCC application demands.

Description

technical field [0001] The invention belongs to the technical field of preparation and application of electronic ceramics, and in particular relates to a method of finely synthesizing MgZrNb by using a wet chemical process. 2 o 8 Dielectric ceramic nano precursor powder method. Background technique [0002] In recent years, with the rapid development of the microwave communication industry, the demand for miniaturized and high-performance microwave circuits and microwave devices is increasing in the fields of mobile communications, car phones, TV satellites, military radars, global positioning systems, and portable phones. This requires the continuous development of new materials with more superior properties. The frequency of the microwave signal is extremely high, the wavelength is extremely short, the information capacity is large, and it has strong directionality, penetration and absorption ability, and microwave equipment can realize the confidentiality of communicati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/495C04B35/624C04B35/626B82Y30/00
Inventor 吴海涛梅全静李从英郭靖栋杨长红
Owner UNIV OF JINAN