CN102690115A - Dielectric ceramic, preparation method and prepared harmonic oscillator - Google Patents
Dielectric ceramic, preparation method and prepared harmonic oscillator Download PDFInfo
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- CN102690115A CN102690115A CN2012101281889A CN201210128188A CN102690115A CN 102690115 A CN102690115 A CN 102690115A CN 2012101281889 A CN2012101281889 A CN 2012101281889A CN 201210128188 A CN201210128188 A CN 201210128188A CN 102690115 A CN102690115 A CN 102690115A
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- harmonic oscillator
- dielectric ceramic
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- sio
- media ceramic
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Abstract
The invention provides a dielectric ceramic. The formula of the dielectric ceramic comprises the following components in percentage by mass: 87.5-93.5% of CaTiO3 (calcium titanate), 1-2.5% of Al2O3 (aluminium oxide), 4-8% of Nd2O3 (neodymium oxide) and 1-2.5% of SiO2 (silica). According to the harmonic oscillator prepared by using the formula of the dielectric ceramic, the dielectric constant can be up to about 80; the loss tangent angle is 0.002, and the harmonic oscillator is compact and uniform in structure and excellent in mechanical property. Therefore, the dielectric ceramic can be widely applied to microwave components such as the harmonic oscillator of a filter.
Description
[technical field]
The present invention relates to the stupalith field, relate in particular to the harmonic oscillator of a kind of media ceramic and preparation method and preparation.
[background technology]
Media ceramic is to be used in the components and parts such as dielectric filter, electrical condenser, requires to have higher dielectric constant and lower tangent of the dielectric loss angle value usually.Along with the new development of antenna microwave device, the specific inductivity and the loss of media ceramic there has been higher requirement.Conventional media ceramic comprises barium titanate and some oxide compounds, but seldom can realize specific inductivity greater than 70, the loss tangent angle can be less than 0.003 product.
[summary of the invention]
Technical problem to be solved by this invention is: a kind of media ceramic is provided, and the harmonic oscillator specific inductivity that this media ceramic is processed is high, loss is low;
The present invention solves the problems of the technologies described above the technical scheme that is adopted: a kind of media ceramic, its prescription comprises 87.5%～93.5% CaTiO by mass percentage
3, 1%～2.5% Al
2O
3, 4%～8% Nd
2O
3With 1%～2.5% SiO
2
A kind of preparation method of media ceramic is by mass percentage with 87.5%～93.5% CaTiO
3, 1%～2.5% Al
2O
3, 4%～8% Nd
2O
3With 1%～2.5% SiO
2Powder carry out wet mixing after, be that 180～250MPa, temperature are that sintering formed in 2～5 hours under 1200 ℃～1400 ℃ conditions at pressure.
Described CaTiO
3, Al
2O
3, Nd
2O
3And SiO
2Particle diameter all is 0.5～1 micron.
A kind of harmonic oscillator, the material for preparing said harmonic oscillator is a media ceramic, the prescription of said media ceramic comprises 87.5%～93.5% CaTiO by mass percentage
3, 1%～2.5% Al
2O
3, 4%～8% Nd
2O
3With 1%～2.5% SiO
2
Beneficial effect of the present invention is: media ceramic specific inductivity of the present invention can reach about 80, the loss tangent angle is 0.002; And compact structure, evenly, satisfactory mechanical property, can the widespread use microwave device for example on filter resonance.
[embodiment]
In order to make the object of the invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
A kind of media ceramic, its prescription comprises 87.5%～93.5% CaTiO by mass percentage
3, 1%～2.5% Al
2O
3, 4%～8% Nd
2O
3With 1%～2.5% SiO
2, staple is CaTiO
3Can improve the specific inductivity of media ceramic, a little SiO
2Can control thermostability and reduce temperature and float, in addition,, can add the Al of 1%～2.5% (mass percent) if mechanical property is had requirement
2O
3,, can add an amount of Nd in order to improve the quality factor of product
2O
3When sintering, the particle diameter of each composition all is 0.5～1 micron.
Utilize the harmonic oscillator of above-mentioned media ceramic formulation, specific inductivity can reach about 80, the loss tangent angle is 0.002, and compact structure, evenly, satisfactory mechanical property, therefore can the widespread use microwave device for example on filter resonance.
Embodiment one:
By mass percentage with 87.5% CaTiO
3, 2% Al
2O
3, 8% Nd
2O
3With 2.5% SiO
2Powder carry out wet mixing after; And the particle diameter of each composition all is 0.5 micron; Utilize hot isostatic pressing technique under 1200 ℃ of temperature, pressure 200MPa condition with above-mentioned materials sintering 2 hours, the harmonic oscillator that makes is through detecting: specific inductivity is 79,, the loss tangent angle is 0.002; Also can adopt discharge plasma sintering technique to prepare above-mentioned harmonic oscillator.
Embodiment two:
By mass percentage with 89% CaTiO
3, 2.5% Al
2O
3, 6% Nd
2O
3With 2.5% SiO
2Powder carry out wet mixing after; And the particle diameter of each composition all is 0.6 micron; Utilize hot isostatic pressing technique under 1200 ℃ of temperature, pressure 220MPa condition with above-mentioned materials sintering 3 hours, the harmonic oscillator that makes is through detecting: specific inductivity is 79.8, the loss tangent angle is 0.002; Also can adopt discharge plasma sintering technique to prepare above-mentioned harmonic oscillator.
Embodiment three
By mass percentage with 90.5% CaTiO
3, 1.8% Al
2O
3, 6.5% Nd
2O
3With 1.2% SiO
2Powder carry out wet mixing after; And the particle diameter of each composition all is 0.5 micron; Utilize hot isostatic pressing technique under 1300 ℃ of temperature, pressure 250MPa condition with above-mentioned materials sintering 4 hours, the harmonic oscillator that makes is through detecting: specific inductivity is 80, the loss tangent angle is 0.002; Also can adopt discharge plasma sintering technique to prepare above-mentioned harmonic oscillator.
Embodiment four
By mass percentage with 91% CaTiO
3, 2% Al
2O
3, 5.5% Nd
2O
3With 1.5% SiO
2Powder carry out wet mixing after; And the particle diameter of each composition all is 0.8 micron; Utilize hot isostatic pressing technique under 1250 ℃ of temperature, pressure 220MPa condition with above-mentioned materials sintering 3.5 hours, the harmonic oscillator that makes is through detecting: specific inductivity is 80, the loss tangent angle is 0.002; Also can adopt discharge plasma sintering technique to prepare above-mentioned harmonic oscillator.
Embodiment five
By mass percentage with 92.5% CaTiO
3, 2% Al
2O
3, 4% Nd
2O
3With 1.5% SiO
2Powder carry out wet mixing after; And the particle diameter of each composition all is 0.7 micron; Utilize hot isostatic pressing technique under 1250 ℃ of temperature, pressure 220MPa condition with above-mentioned materials sintering 5 hours, the harmonic oscillator that makes is through detecting: specific inductivity is 80.1, the loss tangent angle is 0.0022; Also can adopt discharge plasma sintering technique to prepare above-mentioned harmonic oscillator.
Embodiment six
By mass percentage with 93.5% CaTiO
3, 1% Al
2O
3, 4.5% Nd
2O
3With 1% SiO
2Powder carry out wet mixing after; And the particle diameter of each composition all is 1 micron; Utilize hot isostatic pressing technique under 1400 ℃ of temperature, pressure 250MPa condition with above-mentioned materials sintering 4 hours, the harmonic oscillator that makes is through detecting: specific inductivity is 80.2, the loss tangent angle is 0.0023; Also can adopt discharge plasma sintering technique to prepare above-mentioned harmonic oscillator.
Above-mentioned ultra material substrate in sum, utilizing prescription is 70%～76% CaTiO
3Principal crystalline phase, 20%～24% TiO
2With 2%～6% La
2O
3The ultra material substrate processed of ceramic composite, the specific inductivity of its substrate can reach 45, the loss tangent angle is reduced to 0.0001 simultaneously.
In the above-described embodiments, only the present invention has been carried out exemplary description, but those skilled in the art can carry out various modifications to the present invention after reading present patent application under the situation that does not break away from the spirit and scope of the present invention.
Claims (4)
1. media ceramic is characterized in that: its prescription comprises 87.5%～93.5% CaTiO by mass percentage
3, 1%～2.5% Al
2O
3, 4%～8% Nd
2O
3With 1%～2.5% SiO
2
2. the preparation method of a media ceramic is characterized in that, by mass percentage with 87.5%～93.5% CaTiO
3, 1%～2.5% Al
2O
3, 4%～8% Nd
2O
3With 1%～2.5% SiO
2Powder carry out wet mixing after, be that 180～250MPa, temperature are that sintering formed in 2～5 hours under 1200 ℃～1400 ℃ conditions at pressure.
3. the preparation method of media ceramic according to claim 2 is characterized in that: described CaTiO
3, Al
2O
3, Nd
2O
3And SiO
2Particle diameter is 0.5～1 micron.
4. harmonic oscillator, it is characterized in that: said harmonic oscillator is a media ceramic, and the prescription of said media ceramic comprises 87.5%～93.5% CaTiO by mass percentage
3, 1%～2.5% Al
2O
3, 4%～8% Nd
2O
3With 1%～2.5% SiO
2
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101281889A CN102690115A (en) | 2012-04-27 | 2012-04-27 | Dielectric ceramic, preparation method and prepared harmonic oscillator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101281889A CN102690115A (en) | 2012-04-27 | 2012-04-27 | Dielectric ceramic, preparation method and prepared harmonic oscillator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102690115A true CN102690115A (en) | 2012-09-26 |
Family
ID=46855873
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101281889A Pending CN102690115A (en) | 2012-04-27 | 2012-04-27 | Dielectric ceramic, preparation method and prepared harmonic oscillator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102690115A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101851088A (en) * | 2009-03-30 | 2010-10-06 | 京瓷株式会社 | Dielectric ceramics and dielectric resonator |
-
2012
- 2012-04-27 CN CN2012101281889A patent/CN102690115A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101851088A (en) * | 2009-03-30 | 2010-10-06 | 京瓷株式会社 | Dielectric ceramics and dielectric resonator |
Non-Patent Citations (1)
| Title |
|---|
| 童启铭等: "NdAlO3-CaTiO3微波介质陶瓷材料的研究", 《电子元件与材料》 * |
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Application publication date: 20120926 |