New method for finely preparing ixiolite structure MgTiNb2O8 microwave dielectric ceramic by using chemical process

A microwave dielectric ceramic, mg-ti-nb technology, applied in the field of preparation and application of electronic ceramics, can solve the problems of unfavorable ceramic sintering, large particle size of temperature-synthesized powder, etc., achieve single phase stability, high specific surface energy, synthetic The effect of low temperature

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 size of the synthetic powder is large, which is not conducive to the subsequent sintering of ceramics; it provides a fine synthesis of ternary MgO-Nb2O5-TiO by sol-gel method The 2 system microwave dielectric ceramic method uses the sol-gel method to finely synthesize MgTiNb2O8 ceramic powder with a synthesis temperature Low, uniform ceramic particles (about 50nm), 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 Electrical performance to meet LTCC application requirements

Method used

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  • New method for finely preparing ixiolite structure MgTiNb2O8 microwave dielectric ceramic by using chemical process
  • New method for finely preparing ixiolite structure MgTiNb2O8 microwave dielectric ceramic by using chemical process
  • New method for finely preparing ixiolite structure MgTiNb2O8 microwave dielectric ceramic by using chemical process

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Experimental program
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Effect test

Embodiment 1

[0038] according to figure 1 Preparation of MgTiNb by Sol-Gel Process 2 o 8 Ceramic process flow diagram with the following steps:

[0039] 1) Preparation of citric acid aqueous solution of Mg ions

[0040] (a) According to MgTiNb 2 o 8 The stoichiometric ratio of the microwave ceramic phase, adjust the MgO (or Mg(NO 3 ) 2 .6H 2 O) / TiO 2 / Nb 2 o 5 The molar ratio is 1+x / 1 / 1 (03 ) 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;

[0041] (b) take by weighing 23 grams of citric acid, add in the above-mentioned solution and stir, impel citric acid and Mg ion to form complex, make colorless transparent Mg ion citric acid aqueous solution;

[0042] 2) Preparation of citric acid aqueous solution of Ti and Nb ions

[0043] (a) According to MgTiNb 2 o 8 For the stoichiometric ratio of the microwave ceramic phase, 2.396 grams of titanium dioxide and 7.97 grams of niobium...

Embodiment 2

[0053] according to figure 1 Preparation of MgTiNb by Sol-Gel Process 2 o 8 Ceramic process flow diagram with the following steps:

[0054] 1) Preparation of citric acid aqueous solution of Mg ions

[0055] (a) According to MgTiNb 2 o 8 Stoichiometric ratio of microwave ceramic phases, adjusting MgO / TiO 2 / Nb 2 o 5 The molar ratio is 1+x / 1 / 1 (03 ) 2 .6H 2 A total of 2.5641 grams of O was dissolved in 100ml of ionized water and stirred magnetically to form a colorless and transparent solution;

[0056] (b) take by weighing 11.5 grams of citric acid, add in the above-mentioned solution and stir, impel citric acid and Mg ion to form complex, make colorless transparent Mg ion citric acid aqueous solution;

[0057] 2) Preparation of citric acid aqueous solution of Ti and Nb ions

[0058] (a) According to MgTiNb 2 o 8 For the stoichiometric ratio of the microwave ceramic phase, 0.7987 grams of titanium dioxide and 1.9214 grams of niobium oxide were weighed respectivel...

Embodiment 3

[0068] according to figure 1 Preparation of MgTiNb by Sol-Gel Process 2 o 8 Ceramic process flow diagram with the following steps:

[0069] 1) Preparation of citric acid aqueous solution of Mg ions

[0070](a) According to MgTiNb 2 o 8 Stoichiometric ratio of microwave ceramic phases, adjusting MgO / TiO 2 / Nb 2 o 5 The molar ratio is 1+x / 1 / 1 (03 ) 2 .6H 2 A total of 12.82 grams of O was dissolved in 100ml of ionized water and magnetically stirred to form a colorless and transparent solution;

[0071] (b) take by weighing 48 grams of citric acid, add in the above-mentioned solution and stir, impel citric acid and Mg ion to form complex, make colorless transparent Mg ion citric acid aqueous solution;

[0072] 2) Preparation of citric acid aqueous solution of Ti and Nb ions

[0073] (a) According to MgTiNb 2 o 8 For the stoichiometric ratio of the microwave ceramic phase, 3.9935 grams of titanium dioxide and 9.607 grams of niobium oxide were weighed respectively, pla...

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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 MgO-Nb2O5-TiO2 system microwave dielectric ceramic by using a sol-gel method. The technical scheme comprises adopting a sol-gel method to finely synthesize a ternary MgO-Nb2O5-TiO2 system microwave dielectric ceramic, and specifically comprises: 1) preparing a citric acid aqueous solution of Mg ions; 2) preparing a citric acid aqueous solution of Ti ions and Nb ions; and 3) synthesizing a ternary MgTiNb2O8 microwave dielectric ceramic nanometer precursor, and preparing the ceramic. The ternary MgO-Nb2O5-TiO2 system 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 50 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 manganese-tantalum ore structure MgTiNb by wet chemical technology 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,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/495C04B35/624
Inventor 吴海涛杨长红黄三喜胡广达岳云龙
Owner UNIV OF JINAN
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