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Low-temperature sintering temperature stabilization type zirconate microwave dielectric ceramic material and preparation method thereof

A microwave dielectric ceramic and temperature-stable technology, which is applied in the field of electronic information materials and devices, can solve the problems of high performance and low-temperature sintering, and achieve the effects of low cost, abundant raw material sources, and simple preparation methods

Active Publication Date: 2019-10-22
ANHUI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above new high frequency low ε r , The main problem of microwave dielectric materials with high Q value is the contradiction between high performance and low temperature sintering

Method used

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  • Low-temperature sintering temperature stabilization type zirconate microwave dielectric ceramic material and preparation method thereof
  • Low-temperature sintering temperature stabilization type zirconate microwave dielectric ceramic material and preparation method thereof
  • Low-temperature sintering temperature stabilization type zirconate microwave dielectric ceramic material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Preparation of Li 2 Mg 3 ZrO 6 Burnt powder

[0034] Press Li 2 Mg 3 ZrO 6 The stoichiometric ratio weighs 4.413g of MgO with a purity of 99.99%, and 2.752g of Li with a purity of 98%. 2 CO 3 and 4.498 g of ZrO with a purity of 99.99% 212g:25g:25ml of raw materials, agate balls, and absolute ethanol are put into a nylon ball mill jar according to the mass volume ratio, fully mixed and ball milled for 8 hours, dried at 90°C for 10 hours, and pre-calcined at 1200°C for 5 hours to prepare Li 2 Mg 3 ZrO 6 Pre-burned powder;

[0035] (2) Preparation of CaTiO 3 Burnt powder

[0036] by CaTiO 3 The stoichiometric ratio weighs 7.370g of CaCO with a purity of 99.9%. 3 and 5.876g of TiO with a purity of 99.99% 2 , put the raw materials, agate balls, and absolute ethanol in a mass volume ratio of 13g:30g:30ml into a nylon ball mill jar, mix and ball mill for 8 hours, dry at 90°C for 10 hours, and pre-calcine at 1000°C for 8 hours to prepare CaTiO 3 Pre-burned p...

Embodiment 2

[0041] (1) Preparation of Li 2 Mg 3 ZrO 6 Burnt powder

[0042] Press Li 2 Mg 3 ZrO 6 The stoichiometric ratio weighs 4.413g of MgO with a purity of 99.99%, and 2.752g of Li with a purity of 98%. 2 CO 3 and 4.498 g of ZrO with a purity of 99.99% 2 12g:30g:30ml of raw materials, agate balls, and absolute ethanol are put into a nylon ball mill jar according to the mass volume ratio, fully mixed and ball milled for 10 hours, dried at 100°C for 12 hours, and pre-calcined at 1200°C for 6 hours to prepare Li 2 Mg 3 ZrO 6 Pre-burned powder;

[0043] (2) Preparation of CaTiO 3 Burnt powder

[0044] by CaTiO 3 The stoichiometric ratio weighs 7.370g of CaCO with a purity of 99.9%. 3 and 5.876g of TiO with a purity of 99.99% 2 , put raw materials, agate balls, and absolute ethanol in a mass volume ratio of 13g:35g:35ml into a nylon ball mill jar, mix and ball mill for 10 hours, dry at 100°C for 12 hours, and pre-calcine at 1000°C for 10 hours to prepare CaTiO 3 Pre-burned...

Embodiment 3

[0048] (1) Preparation of Li 2 Mg 3 ZrO 6 Burnt powder

[0049] Press Li 2 Mg 3 ZrO 6 The stoichiometric ratio weighs 4.413g of MgO with a purity of 99.99%, and 2.752g of Li with a purity of 98%. 2 CO 3 and 4.498 g of ZrO with a purity of 99.99% 2 , put raw materials, agate balls, and absolute ethanol in a mass volume ratio of 12g:20g:20ml into a nylon ball mill jar, fully mix and ball mill for 6 hours, dry at 80°C for 8 hours, and pre-calcine at 1200°C for 4 hours to prepare Li 2 Mg 3 ZrO 6 Pre-burned powder;

[0050] (2) Preparation of CaTiO 3 Burnt powder

[0051] by CaTiO 3 The stoichiometric ratio weighs 7.370g of CaCO with a purity of 99.9%. 3 and 5.876g of TiO with a purity of 99.99% 2 , put raw materials, agate balls, and absolute ethanol in a mass-volume ratio of 13g:25g:25ml into a nylon ball mill jar, mix well and ball mill for 6 hours, dry at 80°C for 8 hours, and pre-calcine at 1000°C for 6 hours to prepare CaTiO 3 Pre-burned powder;

[0052] (3) ...

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Abstract

The invention discloses a low-temperature sintering temperature stabilization type zirconate microwave dielectric ceramic material, which comprises Li2Mg3ZrO6, CaZrO3 and ZrO2. The preparation methodcomprises: S1, weighing raw materials MgO, Li2CO3 and ZrO2, completely mixing the raw materials, agate balls and absolute ethanol, carrying out ball milling for 6-10 h, drying, and pre-firing to obtain Li2Mg3ZrO6 pre-fired powder; S2, weighing raw materials CaCO3 and TiO2, mixing the raw materials, agate balls and absolute ethanol, carrying out ball milling for 6-10 h, drying, and pre-firing to obtain CaTiO3 pre-fired powder; and S3, adding the Li2Mg3ZrO6 pre-fired powder obtained in the step S1, the CaTiO3 pre-fired powder obtained in the step S2, and LiF into a container, adding agate ballsand absolute ethanol, mixing, carrying out ball milling for 6-10 h, drying, adding a polyvinyl alcohol aqueous solution, granulating, sieving, forming a billet by a sheet pressing machine, and sintering to obtain the low-temperature sintering temperature stabilization type zirconate microwave dielectric ceramic. According to the present invention, the disadvantages of large resonance frequency temperature coefficient and high sintering temperature of the ceramic material are overcome, and the temperature stability of the material is ensured.

Description

technical field [0001] The invention relates to the technical field of electronic information materials and devices thereof, in particular to a low-temperature sintering temperature-stable zirconate microwave dielectric ceramic material and a preparation method thereof. Background technique [0002] traditional low ε r Ceramics are mainly composed of glass-ceramics (glass-ceramics), glass+ceramics (multiphase ceramics), etc. Although glass-ceramic materials can be sintered at relatively low temperatures, due to the introduction of a large amount of low-melting glass substances, the dielectric loss of the material is increased, and it is difficult to use at high frequencies. In order to meet the application requirements of microwave components for microwave dielectric materials in 5G communications, a new type of low dielectric constant (ε r <15), high-Q microwave dielectric ceramic materials have been paid more and more attention by material scholars at home and abroad....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/48C04B35/622
CPCC04B35/48C04B35/622C04B2235/3203C04B2235/3206C04B2235/3208C04B2235/3236C04B2235/3244C04B2235/3248C04B2235/445
Inventor 付志粉范辉颖马建立李璨吴义龙高娟
Owner ANHUI UNIV OF SCI & TECH
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