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Lithium titanate zinc microwave dielectric ceramic material prepared by a semi-chemical method and its preparation method

A technology of microwave dielectric ceramics and lithium zinc titanate, applied in ceramics, inorganic insulators, etc., can solve the problems of the deterioration of ceramic microwave dielectric properties, and achieve the effect of shortening the process production cycle, saving energy, and having a small frequency temperature coefficient τf

Inactive Publication Date: 2016-02-03
CHENGDU TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The introduction of a large amount of sintering aids often leads to the obvious deterioration of the microwave dielectric properties of ceramics

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Step 1, at 60 ~ 80 ℃, the C 16 h 36 o 4 Mix Ti and acetylacetone at a volume ratio of 5:1, add an appropriate amount of ethylene glycol methyl ether, and stir well to obtain C 16 h 36 o 4 Ti (butyl titanate) solution;

[0028] Step 2, LiNO 3 , Zn(NO 3 ) 2 According to the Li:Zn molar ratio of 2:1, the obtained mixture is added with an appropriate amount of ethylene glycol and stirred to make LiNO 3 , Zn(NO 3 ) 2 Dissolve completely, obtain the mixed solution of lithium zinc;

[0029] Step 3. Pour the lithium-zinc mixed solution obtained in step 2 into C of step (1). 16 h 36 o 4 Add an appropriate amount of glacial acetic acid to the Ti solution, control the pH value of the solution in the range of 2 to 3, and stir at a constant temperature for 3 to 5 hours to obtain a colored and transparent clear liquid; after standing and aging for 12 hours, dry at 100°C for 24 hours to obtain dry coagulation The rubber powder was pre-fired in an air atmosphere at 800°C ...

Embodiment 2

[0032] Step 1: at 60-80°C, put C 16 h 36 o 4 Mix Ti and acetylacetone at a volume ratio of 5:1, add an appropriate amount of ethylene glycol methyl ether, and stir well to obtain C 16 h 36 o 4 Ti solution;

[0033] Step 2: Add LiNO 3 , Zn(NO 3 ) 2 According to the Li:Zn molar ratio of 2:1, the obtained mixture is added with an appropriate amount of ethylene glycol and stirred to make LiNO 3 , Zn(NO 3 ) 2 Dissolve completely, obtain the mixed solution of lithium zinc;

[0034] Step 3: pour the lithium-zinc mixed solution obtained in step 2 into the C of step 1 16 h 36 o 4 Add an appropriate amount of glacial acetic acid to the Ti solution, control the pH value of the solution in the range of 2 to 3, and stir at a constant temperature for 3 to 5 hours to obtain a colored and transparent clear liquid; after standing and aging for 12 hours, dry at 100°C for 24 hours to obtain dry coagulation The rubber powder was pre-fired in an air atmosphere at 800°C for 4 hours to...

Embodiment 3

[0037] Step 1: at 60-80°C, put C 16 h 36 o 4 Mix Ti and acetylacetone at a volume ratio of 5:1, add an appropriate amount of ethylene glycol methyl ether, and stir well to obtain C 16 h 36 o 4 Ti solution;

[0038] Step 2: Add LiNO 3 , Zn(NO 3 ) 2 According to the Li:Zn molar ratio of 2:1, the obtained mixture is added with an appropriate amount of ethylene glycol and stirred to make LiNO 3 , Zn(NO 3 ) 2 Dissolve completely, obtain the mixed solution of lithium zinc;

[0039] Step 3: pour the lithium-zinc mixed solution obtained in step 2 into the C of step 1 16 h 36 o 4 Add an appropriate amount of glacial acetic acid to the Ti solution, control the pH value of the solution in the range of 2 to 3, and stir at a constant temperature for 3 to 5 hours to obtain a colored and transparent clear liquid; after standing and aging for 12 hours, dry at 100°C for 24 hours to obtain dry coagulation The rubber powder was pre-fired in an air atmosphere at 800°C for 4 hours to...

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PUM

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Abstract

The invention discloses a lithium-zinc titanate microwave medium ceramic material prepared by a semi-chemical method and a preparation method thereof, and relates to a ceramic composition with components as characteristics. The lithium-zinc titanate microwave medium ceramic material is composed of Li2ZnTi3O8 powder and xwt% of a sintering aid, wherein the sintering aid is one of low-melting-point oxides including B2O3, Bi2O3 and V2O5, and x is 0.25wt%-1.0wt%. A sol-gel method is firstly used to prepare Li2ZnTi3O8 powder, and then, Li2ZnTi3O8 and the sintering aid are mixed to prepare the lithium-zinc titanate microwave medium ceramic material through a solid-phase reaction method. The microwave medium ceramic material prepared by the preparation method disclosed by the invention has a sintering temperature not higher than 900 DEG C, a quality factor Q*f value of about 49760 GHz-60580 GHz, dielectric constant epsilon r of 24.69-26.83, and a resonant frequency temperature coefficient tau f of (-)21.48*10<-6>-15.68*10<-6>, and can be used for manufacturing microwave apparatuses such as a resonator, a microwave antenna and a microwave device.

Description

technical field [0001] The invention belongs to the field of electronic ceramics and its manufacture, and relates to a ceramic composition characterized by components, in particular to a lithium zinc titanate microwave dielectric ceramic material prepared by a semi-chemical method and a preparation method thereof. Background technique [0002] With the innovation of modern communication, wireless local area network, global satellite positioning system and other technologies, various miniaturized, high-frequency, and chip-based new microwave devices and related dielectric ceramics have been developed rapidly. Metal Cu, Ag or Cu / Ag alloy co-fired microwave dielectric ceramics (low temperature co-fired ceramic, LTCC) has become the mainstream of the development of microwave dielectric materials. [0003] As the key material for manufacturing these devices, microwave dielectric ceramics determine the performance of microwave communication devices and systems to a large extent. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B3/12C04B35/462C04B35/622
Inventor 何茗
Owner CHENGDU TECH UNIV