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Rock salt type reconstructed super-lattice structure microwave dielectric ceramic material and preparation method thereof

A microwave dielectric ceramic and superlattice technology is applied in the field of high-Q microwave dielectric ceramic materials and their preparation, and microwave dielectric ceramic materials. The effect of comprehensive microwave dielectric properties and performance improvement

Active Publication Date: 2021-03-09
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the researchers found that Li 3 NbO 4 Three solid solutions with orthorhombic (Fddd), ordered cubic (I-43m) and disordered cubic (Fm-3m) structures were formed in the -MgO pseudobinary system, however they did not study the phase transition process in detail, we think Composition-driven phase transition should be a continuous process

Method used

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  • Rock salt type reconstructed super-lattice structure microwave dielectric ceramic material and preparation method thereof
  • Rock salt type reconstructed super-lattice structure microwave dielectric ceramic material and preparation method thereof
  • Rock salt type reconstructed super-lattice structure microwave dielectric ceramic material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059]Step 1: Magnesium carbonate (Mg (OH)2· 4mgco3· 5h2O), Li2CO3, NB2O5, TA2O5, TIO2And CuO, in accordance with 49.4%, 32.1%, 13.8%, 0.3%, 3.6%, and 0.8% mass ratio, and the ingredients form a mixture.

[0060]Step 2: a ball mill; zirconium dioxide ball is a ball mill, according to the mixture: Grinding ball: The mass ratio of alcohol is 1: 5: 2 to grind 6 hours to give a mixed uniform ball abrasive;

[0061]Step 3: Dry, sieve; the resulting ball abrasive from step 2 is dried and over 100 mesh sieve to dry the powder;

[0062]Step 4: Pre-feeding; the dry powder obtained by step 3 is placed in the alumina crucible, and the pre-bleed powder is obtained for 3 hours under 1010 ° C.

[0063]Step 5: Secondary ball milling; the base obtained by the step 4 is subjected to the second ball mill, and zirconium dioxide ball is a ball mill, according to the mixture: Grinding ball: alcohol is 1: 5: 2 to grind 3 hours Mix uniform secondary ball abrasive;

[0064]Step 6: Dry, sieve; drying the ball abrasive fro...

Embodiment 2

[0068]Step 1: Magnesium carbonate (Mg (OH)2· 4mgco3· 5h2O), Li2CO3, NB2O5, TA2O5, TIO2And ZnO, with a mass ratio of 47.8%, 32.6%, 13.5%, 0.4%, 4.5% and 1.2%, and the ingredients forming a mixture.

[0069]Step 2: A ball mill; zirconium dioxide ball is a ball mill, according to the mixture: Grinding ball: The mass ratio of alcohol is 1: 5: 2 to ground 7 hours to obtain a mixed uniform ball abrasive;

[0070]Step 3: Dry, sieve; the resulting ball abrasive from step 2 is dried and over 100 mesh sieve to dry the powder;

[0071]Step 4: Pre-feeding; the dry powder obtained by step 3 is placed in the alumina crucible, and prepared for 3 hours under 1050 ° C for 3 hours.

[0072]Step 5: Secondary ball milling; the base obtained by the step 4 is subjected to the second ball mill, and zirconium dioxide ball is a ball mill, according to the mixture: Grinding ball: alcohol is 1: 5: 2 to grind 3 hours Mix uniform secondary ball abrasive;

[0073]Step 6: Dry, sieve; drying the ball abrasive from step 5 and ove...

Embodiment 3

[0077]Step 1: Magnesium carbonate (Mg (OH)2· 4mgco3· 5h2O), Li2CO3, NB2O5, TA2O5, TIO2And NIO, in accordance with 42.7%, 33.7%, 13.8%, 0.56%, 7.84% and 1.4% mass ratio, and the ingredient formation mixture;

[0078]Step 2: A ball mill; zirconium dioxide ball is a ball mill, according to the mixture: Grinding ball: The mass ratio of alcohol is 1: 7: 4 to ground 7 hours to obtain a mixed uniform ball abrasive;

[0079]Step 3: Dry, sieve; the resulting ball abrasive from step 2 is dried and over 100 mesh sieve to dry the powder;

[0080]Step 4: Pre-feeding; the dry powder obtained by step 3 is placed in the alumina crucible, and the pre-bleed powder is obtained at 1090 ° C for 3 hours;

[0081]Step 5: Quadruple ball milling; the base obtained by the step 4 is second ball mill, based on zirconia ball as a ball mill, according to the mixture: Grinding ball: the mass ratio of alcohol is 1: 3: 1 for grinding 4 hours Mix uniform secondary ball abrasive;

[0082]Step 6: Dry, sieve; drying the ball abrasive...

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Abstract

The invention provides a rock salt type reconstructed super-lattice structure microwave dielectric ceramic material and a preparation method thereof. The general chemical formula of the material is Li3+x(1-yAy)2-2xNb1-xTi2xO6Mg, and A is one or more of divalent ions: Cu2+, Zn2+, Ni2+ and Co2+, 0.08<=x<=0.3 or 0.8<=x<=0.92 and 0<y<=0.05; the preparation method comprises the following steps: burdening, ball milling, drying and sieving, pre-sintering, granulating, compression molding and sintering. The prepared material has a typical rock salt type reconstruction short-range ordered super-latticestructure, is highly compact in micro-structure, free of pores and micro-cracks and high in quality factor, Q*f ranges from 9,000 GHz to 13,000 GHz, the relative dielectric constant [epsilon]r rangesfrom 16 to 21, and the frequency temperature coefficient [tau]f ranges from -30 ppm / DEG C to +3 ppm / DEG C. The formula does not contain volatile toxic metals such as Pb, Cd and the like, and the material is stable in performance, and can meet the application requirements of modern microwave devices.

Description

Technical field[0001]The present invention belongs to the technical field of electronic information functional material, and it is directed to a microwave medium ceramic material having reconstructed superlattice structures by regulating the rock salt phase phase change process in solid solution, especially a high Q value microwave medium ceramic material. And the preparation method.Background technique[0002]Microwave medium ceramics refer to ceramics applied to microwave (300 MHz ~ 300GHz) band circuit as media material and complete one or more functions, is a key base material in modern communication technology, which is widely used in media resonators, filters , Medium substrate, medium waveguide circuit, microwave capacitance, duplexer, antenna and other microwave components. In the high frequency microwave circuit, many microwave devices require a medium ceramic material as a substrate such that the microwave ceramic dielectric substrate material is increasingly becoming a key ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/495C04B35/462C04B35/622C04B35/64
CPCC04B35/495C04B35/462C04B35/622C04B35/64C04B2235/3251C04B2235/3203C04B2235/3206C04B2235/3232C04B2235/3281C04B2235/3279C04B2235/3275C04B2235/3284C04B2235/6562C04B2235/6567C04B2235/76C04B2235/762C04B2235/96
Inventor 方梓烜唐斌张星张树人
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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