Li2Zn3Ti4O12 microwave dielectric ceramic material and low temperature sintering method thereof

A technology for microwave dielectric ceramics and ceramic materials, which is applied in the field of Li2Zn3Ti4O12 microwave dielectric ceramic materials and their low-temperature sintering, can solve the problems of high sintering temperature and reduce the sintering temperature of materials, and achieve the effects of simple chemical composition and preparation process and excellent microwave performance.

Active Publication Date: 2010-12-15
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Although most commercial microwave dielectric materials have excellent microwave dielectric properties, their sintering temperature is

Method used

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  • Li2Zn3Ti4O12 microwave dielectric ceramic material and low temperature sintering method thereof
  • Li2Zn3Ti4O12 microwave dielectric ceramic material and low temperature sintering method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] 1) First, Li with a purity ≥ 99% 2 CO 3 , ZnO and TiO 2 Moore Billy 2 CO 3 :ZnO:TiO 2 = 1:3:4 to prepare the main powder;

[0016] 2) Then mix the prepared main powder evenly, add analytical pure alcohol to the main powder according to the mass ratio of the main powder and analytical pure alcohol as 1:1, use wet grinding method to mix for 4 hours, grind it finely in Dry at 120°C, sieve with 80-mesh sieve, press into block after sieving, then raise the pressed block raw material from room temperature to 850°C at a heating rate of 5°C / min and keep it warm at this temperature 4h, made into burnt block;

[0017] 3) Pulverize the sintered block made above, carry out secondary ball milling for 4 hours, put it into an oven for drying, and then add 0.5% BaCu (B 2 o 5 ), made into powder, according to the volume ratio of powder and analytical pure alcohol is 1:1, add analytical pure alcohol to the powder, put it in a nylon tank and ball mill it for 4 hours, take it out, ...

Embodiment 2

[0019] 1) First, Li with a purity ≥ 99% 2 CO 3 , ZnO and TiO 2 Moore Billy 2 CO 3 :ZnO:TiO 2 = 1:3:4 to prepare the main powder;

[0020] 2) Then mix the prepared main powder evenly, add analytical pure alcohol to the main powder according to the mass ratio of the main powder and analytical pure alcohol as 1:1, use wet grinding method to mix for 4 hours, grind it finely in Dry at 120°C, sieve with 80-mesh sieve, press into block after sieving, then raise the pressed block raw material from room temperature to 850°C at a heating rate of 5°C / min and keep it warm at this temperature 4h, made into burnt block;

[0021] 3) Pulverize the burnt block made above, carry out secondary ball milling for 4 hours, put it into the oven and add BaCu (B 2 o 5 ), made into powder, according to the volume ratio of powder and analytical pure alcohol is 1:1, add analytical pure alcohol to the powder, put it in a nylon tank and ball mill it for 4 hours, take it out, put it in an oven and ba...

Embodiment 3

[0023] 1) First, Li with a purity ≥ 99% 2 CO 3 , ZnO and TiO 2 Moore Billy 2 CO 3 :ZnO:TiO 2 = 1:3:4 to prepare the main powder;

[0024]2) Then mix the prepared main powder evenly, add analytical pure alcohol to the main powder according to the mass ratio of the main powder and analytical pure alcohol as 1:1, use wet grinding method to mix for 4 hours, grind it finely in Dry at 125°C, sieve with 80-mesh sieve, press into block after sieving, then raise the pressed block raw material from room temperature to 900°C at a heating rate of 5°C / min and keep it warm at this temperature 4h, made into burnt block;

[0025] 3) Pulverize the burnt block made above, carry out secondary ball milling for 4 hours, put it into the oven and add BaCu (B 2 o 5 ), made into powder, according to the volume ratio of powder and analytical pure alcohol is 1:1, add analytical pure alcohol to the powder, put it into a nylon jar and ball mill it for 4 hours, take it out, put it in an oven and ba...

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Abstract

The invention discloses a Li2Zn3Ti4O12 microwave dielectric ceramic material and a low temperature sintering method thereof. The Li2Zn3Ti4O12 microwave dielectric ceramic material comprises 95% to 99.75% of Li2Zn3Ti4O12 and 0.25% to 5% of low melting point material by weight percent, wherein the low melting point material is one of H3BO3, BaCu(B2O5), V2O5 and Bi2O3. The method comprises the stepsof: firstly pre-calcining to synthesize a main powder body according to a molar ratio of Li2CO3: ZnO: TiO2=1:3:4; adding BaCu(B2O5), H3BO3, Bi2O3 or V2O5 to the main powder body; and granulating, tabletting and sintering. The prepared microwave dielectric ceramic material has low sintering temperature (about 900 DEG C), excellent microwave performance, large microwave constant (epsilon r), high Q*f value and small tau f, does not react with silver (Ag), and can be co-fired with pure silver as an electrode, largely reduce the manufacturing cost of a device, and be used for manufacturing microwave devices, such as low temperature co-fired ceramic (LTCC) system, multilayer dielectric resonators, microwave antennae, filters and the like.

Description

technical field [0001] The invention belongs to the field of electronic ceramics and its manufacture, and relates to a Li 2 Zn 3 Ti 4 o 12 Microwave dielectric ceramic material and its low-temperature sintering method. 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 more and more urgent. LTCC (Low Temperature Co-fired Ceramics) has become one of the main technologies for electronic device modularization due to its excellent electrical, mechanical, thermal and process characteristics. The sintering temperature of low temperature co-fired ceramic system (LTCC) is low, and the metal with low resistivity can be used as the conductor material of multilayer wiring, which can improve the assembly density and signal transmission speed, and can be embedded in a variety of multilaye...

Claims

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Application Information

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IPC IPC(8): C04B35/462C04B35/622
Inventor 周焕福陈秀丽方亮刘晓斌王一良
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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