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Low-temperature co-fired Li2MgTi3O8 microwave dielectric ceramic material and preparation method thereof

A microwave dielectric ceramic and low-temperature co-firing technology, applied in ceramics, inorganic insulators, etc., can solve the problems of insufficient comprehensive performance, adverse effects, low quality factor Q×f, etc., and achieve excellent microwave performance, stable and reliable performance, chemical Simple effect of composition and preparation process

Inactive Publication Date: 2012-09-19
GUILIN UNIV OF ELECTRONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the overall performance of the material is not good enough, especially the quality factor Q×f is low (6600GHz≤ Q×f≤ 40000GHz), and the addition B 2 o 3 and V 2 o 5 Adverse effects in tape casting production

Method used

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  • Low-temperature co-fired Li2MgTi3O8 microwave dielectric ceramic material and preparation method thereof
  • Low-temperature co-fired Li2MgTi3O8 microwave dielectric ceramic material and preparation method thereof
  • Low-temperature co-fired Li2MgTi3O8 microwave dielectric ceramic material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] A method for preparing a low-temperature co-fired lithium-magnesium-titanium microwave dielectric ceramic material, in which LMB glass powder is added to the composition.

[0024] 1) Synthesis of Li 2 MgTi 3 o 8 : Li 2 CO 3 (purity>97.5%), (MgCO 3 ) 4 Mg(OH) 2 ·5HO 2 and TiO 2 (purity ≥ 99%) as raw material, according to the molar ratio Li 2 CO 3 :MgO:TiO 2 = 1:1:3 Weigh the material, mix the prepared material with absolute alcohol as the medium, ball mill and mix for 24 h, dry and sieve, and then synthesize Li at 900 °C for 4 h 2 MgTi 3 o 8 main powder.

[0025] 2) Preparation of LMB glass powder: with Li 2 CO 3 (purity ≥ 97.5%), (MgCO 3 ) 4 Mg(OH) 2 ·5HO 2 and H 3 BO 3(purity ≥ 99%) as raw material, according to aLi 2 O+ bMgO +cB 2 o 3 Carry out batching, wherein a=30%, b=10%, c=60% by mole percentage. Keep the batch material at 950°C for 1 hour, then pour it into cold water to form glass slag, and get D through ball milling 50 =5μm LMB glas...

Embodiment 2

[0028] A method for preparing a low-temperature co-fired lithium-magnesium-titanium microwave dielectric ceramic material, in which LMB glass powder is added to the composition.

[0029] 1) Synthesis of Li 2 MgTi 3 o 8 : Li 2 CO 3 (purity ≥ 97.5%), (MgCO 3 ) 4 Mg(OH) 2 ·5HO 2 and TiO 2 (purity ≥ 99%) as raw material, according to the molar ratio Li 2 CO 3 :MgO:TiO 2 = 1:1:3 Weigh the material, mix the prepared material with absolute alcohol as the medium, ball mill and mix for 24 h, dry and sieve, and then synthesize Li at 900 °C for 4 h 2 MgTi 3 o 8 main powder.

[0030] 2) Preparation of LMB glass powder: with Li 2 CO 3 (purity ≥ 97.5%), (MgCO 3 ) 4 Mg(OH) 2 ·5HO 2 and H 3 BO 3 (purity ≥ 99%) as raw material, according to aLi 2 O+ bMgO +cB 2 o 3 Carry out batching, wherein a=30%, b=10%, c=60% by mole percentage. Keep the batch material at 950°C for 1 hour, then pour it into cold water to form glass slag, and get D through ball milling 50 =5μm LMB g...

Embodiment 3

[0033] A method for preparing a low-temperature co-fired lithium-magnesium-titanium microwave dielectric ceramic material, in which LMB glass powder is added to the composition.

[0034] 1) Synthesis of Li 2 MgTi 3 o 8 : Li 2 CO 3 (purity ≥ 97.5%), (MgCO 3 ) 4 Mg(OH) 2 ·5HO 2 and TiO 2 (purity ≥ 99%) as raw material, according to the molar ratio Li 2 CO 3 :MgO:TiO 2 = 1:1:3 Weigh the material, mix the prepared material with absolute alcohol as the medium, ball mill and mix for 24 h, dry and sieve, and then synthesize Li at 900 °C for 4 h 2 MgTi 3 o 8 main powder.

[0035] 2) Preparation of LMB glass powder: with Li 2 CO 3 (purity ≥ 97.5%), (MgCO 3 ) 4 Mg(OH) 2 ·5HO 2 and H 3 BO 3 (purity ≥ 99%) as raw material, according to aLi 2 O+ bMgO +cB 2 o 3 Carry out batching, wherein a=30%, b=10%, c=60% by mole percentage. Keep the batch material at 950°C for 1 hour, then pour it into cold water to form glass slag, and get D through ball milling 50 =5μm LMB g...

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Abstract

The invention discloses a low-temperature co-fired Li2MgTi3O8 microwave dielectric ceramic material and a preparation method thereof. The material comprises a main powder material Li2MgTi3O8 and low-melting-point Li2O-MgO-B2O3 (LMB) glass powder. The glass powder is added into Li2MgTi3O8 powder in the form of powder and then the mixture is evenly mixed in a ball mill and is dried, granulated and fired to obtain the material. The proportions of components for preparing the material are determined by taking the Li2MgTi3O8 powder as a reference, wherein the weight of the glass powder accounts for 0.5-3 percent of the weight of Li2MgTi3O8 powder. The material can be obtained through the traditional solid-phase reaction synthesis method. The low-temperature co-fired microwave dielectric ceramic material prepared by adopting the preparation method has the advantages that the firing temperature is low (approximate 875 DEG C), the microwave dielectric performance is excellent, the dielectric constant (epsilon r) is large, the quality factor (Q-f) is high, the resonant frequency-temperature factor (tf) is close to zero, the effect of co-firing with an Ag electrode is good, high-conductivity low-cost pure silver can be used as an electrode material, the manufacturing cost of devices can be greatly reduced, and the low-temperature co-fired microwave dielectric ceramic material can be used for manufacturing microwave devices such as low-temperature co-fired ceramic (LTCC) systems, multilayer dielectric resonators, microwave antennas and filters.

Description

technical field [0001] The invention belongs to the field of electronic information materials and their manufacture, and relates to a microwave dielectric ceramic material, in particular to a low-temperature co-fired lithium-magnesium-titanium microwave dielectric ceramic material and a preparation method thereof. Background technique [0002] With the continuous development of electronic information technology in the direction of high frequency and digitalization, the requirements for miniaturization, integration and modularization of components are becoming increasingly urgent. Low temperature co-fired ceramics (LTCC) , Mechanical, thermal and process characteristics and high reliability have become one of the main technologies for modularization of electronic devices. The sintering temperature of the LTCC system is low, and base metals with high conductivity (such as Ag, Cu, etc.) can be used as conductor materials for multilayer wiring, which can increase the assembly de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/465C03C12/00C04B35/622H01B3/12
Inventor 陈国华包燕侯美珍秦杰
Owner GUILIN UNIV OF ELECTRONIC TECH
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