CN102765934B - A kind of microwave-medium ceramics and preparation method and harmonic oscillator - Google Patents
A kind of microwave-medium ceramics and preparation method and harmonic oscillator Download PDFInfo
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- CN102765934B CN102765934B CN201210220511.5A CN201210220511A CN102765934B CN 102765934 B CN102765934 B CN 102765934B CN 201210220511 A CN201210220511 A CN 201210220511A CN 102765934 B CN102765934 B CN 102765934B
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Abstract
The invention provides a kind of microwave-medium ceramics, microwave-medium ceramics comprises the xCaTiO of 75% ~ 85% by weight percentage
3-(1-x) NdAlO
3with 15% ~ 25% Al
2o
3, wherein 0.65≤x≤0.7; Also relate to the preparation method of this microwave-medium ceramics, the specific inductivity of this microwave-medium ceramics can reach 40, Qf can reach 20000, temperature coefficient of resonance frequency is stablized, and is about 3ppm/ DEG C; And compact structure, evenly, satisfactory mechanical property, can on widespread use microwave device such as filter resonance.
Description
[technical field]
The present invention relates to stupalith field, particularly relate to the harmonic oscillator of a kind of microwave-medium ceramics and preparation method and preparation.
[background technology]
Media ceramic is used in the components and parts such as dielectric filter, electrical condenser, usually requires to have higher specific inductivity and lower tangent of the dielectric loss angle value.Along with the new development of antenna microwave device, there is higher requirement to the specific inductivity of media ceramic and loss.Conventional media ceramic comprises barium titanate and some oxide compounds, but seldom can realize high-k, low-loss product.
[summary of the invention]
Technical problem to be solved by this invention is: provide a kind of microwave-medium ceramics, and the harmonic oscillator specific inductivity that this microwave-medium ceramics is made is high, loss is low, and temperature coefficient of resonance frequency is stablized;
The present invention solves the problems of the technologies described above adopted technical scheme: a kind of microwave-medium ceramics, comprises the xCaTiO of 75% ~ 85% by weight percentage
3-(1-x) NdAlO
3with 15% ~ 25% Al
2o
3, wherein 0.65≤x≤0.7.
A preparation method for media ceramic, by the xCaTiO of 75wt% ~ 85wt%
3-(1-x) NdAlO
3the Al of ceramics powder and 15wt% ~ 25wt%
2o
3after ceramics powder carries out wet mixing, pressure be 180 ~ 250MPa, temperature sinters under being 1300 DEG C ~ 1500 DEG C conditions and forms for 2 ~ 4 hours, wherein 0.65≤x≤0.7.
A kind of harmonic oscillator, described harmonic oscillator is microwave-medium ceramics, and described microwave-medium ceramics comprises the xCaTiO of 75% ~ 85% by weight percentage
3-(1-x) NdAlO
3with 15% ~ 25% Al
2o
3, wherein 0.65≤x≤0.7.
Beneficial effect of the present invention is: microwave-medium ceramics specific inductivity of the present invention is about 40, Qf can reach 20000GHz, and temperature coefficient of resonance frequency is stablized, and is about 3ppm/ DEG C; And compact structure, evenly, satisfactory mechanical property, can on widespread use microwave device such as filter resonance.
[embodiment]
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
A kind of microwave-medium ceramics, microwave-medium ceramics comprises the xCaTiO of 75% ~ 85% by weight percentage
3-(1-x) NdAlO
3with 15% ~ 25% Al
2o
3, wherein 0.65≤x≤0.7.Add a small amount of Al
2o
3the mechanical property of microwave-medium ceramics can be improved.
The harmonic oscillator that the ceramics powder meeting above-mentioned expression formula is made, specific inductivity can reach 40, Qf can reach 20000GHz, and temperature coefficient of resonance frequency is stablized, and is about 3ppm/ DEG C; And compact structure, evenly, satisfactory mechanical property, can on widespread use microwave device such as filter resonance.
Embodiment one:
By mass percentage by the 0.65CaTiO of 75%
3-0.35NdAlO
3ceramics powder and 25% Al
2o
3after ceramics powder carries out wet mixing, utilize hot isostatic pressing technique, under temperature 1300 DEG C, pressure 200MPa condition, above-mentioned materials is sintered 3 hours, obtained harmonic oscillator is after testing: specific inductivity is about 40, Qf can reach 20000GHz, and temperature coefficient of resonance frequency is stablized, and is about 3ppm/ DEG C; And compact structure, evenly, satisfactory mechanical property, can on widespread use microwave device such as filter resonance.
Embodiment two:
By mass percentage by the 0.65CaTiO of 80%
3-0.35NdAlO
3ceramics powder and 20% Al
2o
3after ceramics powder carries out wet mixing, utilize hot isostatic pressing technique, under temperature 1350 DEG C, pressure 220MPa condition, above-mentioned materials is sintered 3 hours, obtained harmonic oscillator is after testing: specific inductivity is about 40, Qf can reach 20000GHz, and temperature coefficient of resonance frequency is stablized, and is about 33ppm/ DEG C; And compact structure, evenly, satisfactory mechanical property, can on widespread use microwave device such as filter resonance.
Embodiment three
By mass percentage by the 0.65CaTiO of 85%
3-0.35NdAlO
3ceramics powder and 15% Al
2o
3after ceramics powder carries out wet mixing, utilize hot isostatic pressing technique, under temperature 1380 DEG C, pressure 250MPa condition, above-mentioned materials is sintered 4 hours, obtained harmonic oscillator is after testing: specific inductivity is about 40, Qf can reach 20000GHz, and temperature coefficient of resonance frequency is stablized, and is about 3ppm/ DEG C; And compact structure, evenly, satisfactory mechanical property, can on widespread use microwave device such as filter resonance.
Embodiment four
By mass percentage by the 0.67CaTiO of 80%
3-0.33NdAlO
3ceramics powder and 20% Al
2o
3after ceramics powder carries out wet mixing, utilize hot isostatic pressing technique, under temperature 1420 DEG C, pressure 250MPa condition, above-mentioned materials is sintered 2 hours, obtained harmonic oscillator is after testing: specific inductivity is about 40, Qf can reach 20000GHz, and temperature coefficient of resonance frequency is stablized, and is about 3ppm/ DEG C; And compact structure, evenly, satisfactory mechanical property, can on widespread use microwave device such as filter resonance.
Embodiment five
By mass percentage by the 0.685CaTiO of 80%
3-0.315NdAlO
3ceramics powder and 20% Al
2o
3after ceramics powder carries out wet mixing, utilize hot isostatic pressing technique, under temperature 1420 DEG C, pressure 250MPa condition, above-mentioned materials is sintered 3 hours, obtained harmonic oscillator is after testing: specific inductivity is about 40, Qf can reach 20000GHz, and temperature coefficient of resonance frequency is stablized, and is about 3ppm/ DEG C; And compact structure, evenly, satisfactory mechanical property, can on widespread use microwave device such as filter resonance.
Embodiment six
By mass percentage by the 0.7CaTiO of 80%
3-0.3NdAlO
3ceramics powder and 20% Al
2o
3after ceramics powder carries out wet mixing, utilize hot isostatic pressing technique, under temperature 1450 DEG C, pressure 250MPa condition, above-mentioned materials is sintered 3 hours, obtained harmonic oscillator is after testing: specific inductivity is about 40, Qf can reach 20000GHz, and temperature coefficient of resonance frequency is stablized, and is about 3ppm/ DEG C; And compact structure, evenly, satisfactory mechanical property, can on widespread use microwave device such as filter resonance.
In sum, the xCaTiO of 75% ~ 85% is comprised by weight percentage
3-(1-x) NdAlO
3with 15% ~ 25% Al
2o
3, wherein 0.65≤x≤0.7, its specific inductivity can reach 40, Qf can reach 20000GHz, and temperature coefficient of resonance frequency is stablized, and is about 3ppm/ DEG C; And compact structure, even, satisfactory mechanical property.
In the above-described embodiments, only to invention has been exemplary description, but those skilled in the art can carry out various amendment to the present invention without departing from the spirit and scope of the present invention after reading present patent application.
Claims (3)
1. a microwave-medium ceramics, is characterized in that: comprise the xCaTiO of 75% ~ 85% by weight percentage
3-(1-x) NdAlO
3with 15% ~ 25% Al
2o
3, wherein 0.65≤x≤0.7, wherein, described microwave-medium ceramics utilizes hot isostatic pressing technique to sinter, and the specific inductivity of the harmonic oscillator made thus can reach 40, Qf can reach 20000GHz, and temperature coefficient of resonance frequency stabilizes to 3ppm/ DEG C.
2. a preparation method for media ceramic, is characterized in that, by the xCaTiO of 75wt% ~ 85wt%
3-(1-x) NdAlO
3the Al of ceramics powder and 15wt% ~ 25wt%
2o
3after ceramics powder carries out wet mixing, utilize hot isostatic pressing technique pressure be 180 ~ 250MPa, temperature sinters under being 1300 DEG C ~ 1500 DEG C conditions and forms for 2 ~ 4 hours, the specific inductivity of the harmonic oscillator made thus can reach 40, Qf can reach 20000GHz, wherein 0.65≤x≤0.7, and temperature coefficient of resonance frequency stabilizes to 3ppm/ DEG C.
3. a harmonic oscillator, is characterized in that: described harmonic oscillator is microwave-medium ceramics, and described microwave-medium ceramics comprises the xCaTiO of 75% ~ 85% by weight percentage
3-(1-x) NdAlO
3with 15% ~ 25% Al
2o
3, wherein 0.65≤x≤0.7, wherein, described microwave-medium ceramics utilizes hot isostatic pressing technique to sinter, and the specific inductivity of the harmonic oscillator made thus can reach 40, Qf can reach 20000GHz, and temperature coefficient of resonance frequency stabilizes to 3ppm/ DEG C.
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|---|---|---|---|
| CN201210220511.5A CN102765934B (en) | 2012-06-29 | 2012-06-29 | A kind of microwave-medium ceramics and preparation method and harmonic oscillator |
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| CN201210220511.5A CN102765934B (en) | 2012-06-29 | 2012-06-29 | A kind of microwave-medium ceramics and preparation method and harmonic oscillator |
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| CN102765934B true CN102765934B (en) | 2016-02-10 |
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| CN113896524B (en) * | 2021-11-18 | 2023-05-05 | 无锡鑫圣慧龙纳米陶瓷技术有限公司 | High-temperature stable low-dielectric-constant microwave dielectric ceramic and preparation method thereof |
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- 2012-06-29 CN CN201210220511.5A patent/CN102765934B/en active Active
Non-Patent Citations (2)
| Title |
|---|
| Al2O3掺杂对( Ca0. 7Nd0.3)(Ti0. 7Al0. 3)O3微波介电性能的影响;韩煜娴 等;《压电与声光》;20100630;第32卷(第3期);第464页摘要，第464-465页试验部分 * |
| NdAlO3-CaTiO3微波介质陶瓷材料的研究;童启铭 等;《电子元件与材料》;20110930;第30卷(第09期);全文 * |
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