CN102617141A - Intermediate-temperature sintered microwave dielectric ceramic - Google Patents
Intermediate-temperature sintered microwave dielectric ceramic Download PDFInfo
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- CN102617141A CN102617141A CN2012100973806A CN201210097380A CN102617141A CN 102617141 A CN102617141 A CN 102617141A CN 2012100973806 A CN2012100973806 A CN 2012100973806A CN 201210097380 A CN201210097380 A CN 201210097380A CN 102617141 A CN102617141 A CN 102617141A
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Abstract
The invention discloses intermediate-temperature sintered microwave dielectric ceramic, which comprises raw material components in the molar percentage content of MgTiNb2O8. The preparation comprises the following steps of: proportioning; mixing; drying; sieving; calcining at 780 DEG C for 3 hours to synthesize a clinker; pressing into blank; and sintering at 1,100-1,200 DEG C to prepare the MgTiNb2O8 microwave dielectric ceramic. According to the intermediate-temperature sintered microwave dielectric ceramic, the sintering temperature is low, the quality factor is high and is 36,000-60,000 GHz, the dielectric constant is 28-32, the temperature stability is good, the resonant frequency temperature coefficient is -7.4-31*10<-6>/ DEG C; and the intermediate-temperature sintered microwave dielectric ceramic is widely applied to each field of microwave technology.
Description
Technical field
The invention belongs to electronic information material and components and parts field, relate in particular to a kind of with MgTiNb
2O
8Novel intermediate sintering temperature microwave dielectric ceramic materials for chemical formula.
Technical background
Be accompanied by land mobile communication, trailer-mounted radar, direct satellite broadcasting TV, Global Positioning System microwave application technology rapid development such as (GPS), high-endization of frequency, integrated, miniaturized and cost degradation have become the inexorable trend of microwave technology development.Can process dielectric resonator, dielectric filter, duplexer, microwave-medium antenna, dielectric resonator oscillator, Medium Wave Guide transmission line etc. with microwave ceramic material.These devices are widely used in the microwave technology every field.
Present most of high performance microwave medium ceramic material sintering temperature is all higher, has limited its widespread use greatly.And the low-temperature sintering research of high sintering temperature material is cost mostly with any sacrifice in performance.Therefore, research and the application facet of microwave dielectric ceramic materials in this area that has a high-performance intermediate sintering temperature has great advantage.
MgTiNb
2O
8Be ixiolite structure microwave dielectric ceramic materials, its sintering temperature lower (≤1200 ℃), and have good microwave dielectric property, also do not see relevant report of the present invention both at home and abroad.The present invention adopts conventional solid-state method, has prepared the MgTiNb of intermediate sintering temperature
2O
8Microwave-medium ceramics, and tested its microwave dielectric property.
Summary of the invention
The objective of the invention is to adapt to electronic information technology constantly to high frequencyization and digitizing direction development need, the MgTiNb of the novel intermediate sintering temperature of a kind of temperature stability height, medium dielectric constant microwave medium, high Qf value is provided
2O
8Microwave-medium ceramics.
The present invention is achieved through following technical scheme.
Intermediate sintering temperature microwave-medium ceramics of the present invention, feed composition and mole percent level thereof are MgTiNb
2O
8
Its preparation process is following:
(1) with raw material MgO, Nb
2O
5, TiO
2Press MgTiNb respectively
2O
8The chemical formula weigh batching;
(2) the above-mentioned chemical feedstocks that configures is mixed, put into ball grinder, add zirconia ball and deionized water, raw material: deionized water: the mass ratio of zirconium ball is 1: 1: 1.2, and ball milling 1～12 hour is dried the raw material behind the ball milling in infrared drying oven, sieve;
(3) powder that step (2) is mixed is calcined 3 hours synthetic frits at 780 ℃;
(4) be that 0.35～0.75% Z 150PH is put into ball grinder with adding mass percent in step (3) frit, add zirconia ball and deionized water, ball milling 4～8 hours sieves after the oven dry, is pressed into the cylinder shape base substrate of Φ 10mm * 5mm again with powder compressing machine;
(5) with step (4) cylinder shape base substrate in 1100～1200 ℃ of sintering 2～6 hours, make MgTiNb
2O
8Microwave-medium ceramics;
(6) with the microwave dielectric property of network analyzer test microwave-medium ceramics.
The raw material of said step (1) is a purity greater than 99.9% analytical pure raw material.
Raw material behind the ball milling of said step (2) is 100～120 ℃ of oven dry in infrared drying oven.
The base substrate of said step (4) is the cylinder shape base substrate of Φ 10mm * 5mm, and the gauge pressure of tabletting machine is 6～10MPa.
The invention has the beneficial effects as follows, a kind of MgTiNb of intermediate sintering temperature is provided
2O
8Microwave-medium ceramics, its sintering temperature is low, is 1100～1200 ℃, and specific inductivity is 28～32, and quality factor are high, are 36,000～60,000GHz, temperature stability is good, and temperature coefficient of resonance frequency is-7.4～31 * 10
-6/ ℃.
Embodiment
Below in conjunction with specific embodiment the present invention is further described.
The present invention adopts purity greater than 99.9% analytical pure raw material, according to MgTiNb
2O
8Stoichiometric ratio prepare burden, mix; In mixing raw material: deionized water: the mass ratio of zirconium ball is that 1: 1: 1.2 ratio adds in the nylon ball grinder; At rotating speed is ball milling 1～12 hour on the 400r/min planetary ball mill, in the 1500W infrared drying oven in 100～120 ℃ of oven dry; In 780 ℃ of pre-burning 3h, make frit; In this frit, adding mass percent is that 0.35～0.75% Z 150PH is put into ball grinder; Add zirconia ball and deionized water; Ball milling 4～8 hours sieves after the oven dry, is pressed into the cylinder shape base substrate of Φ 10mm * 5mm again with the pressure of 6～10MPa with powder compressing machine; The cylinder shape base substrate in 1100～1200 ℃ of sintering 2～6 hours, is made microwave-medium ceramics.
The proportioning raw materials of the specific embodiment of the invention is: 1.0442 gram MgO, 6.8866 gram Nb
2O
5, 2.0692 the gram TiO
2
The related process parameter of the foregoing description and the test result of microwave dielectric property see table 1 for details.
Table 1
The detection method of the embodiment of the invention is following:
1. the diameter of sample and thickness use milscale to measure.
2. by Agilent 8720ES network analyzer; Adopt open type chamber parallel plate method to measure the specific inductivity of prepared cylindrical ceramic material; Test fixture is put into the high cold cycle incubator of ESPEC MC-710F type carry out the measurement of temperature coefficient of resonance frequency, TR is that 25-85 ℃ of test frequency is in the 8-10.5GHz scope.
3. adopt enclosed chamber method to measure the quality factor of prepared cylindrical ceramic sample, test frequency is in the 6.2-7.1GHz scope.
The present invention is not limited to the foregoing description, and the variation of a lot of details is possible, but therefore this do not run counter to scope of the present invention and spirit.
Claims (4)
1. intermediate sintering temperature microwave-medium ceramics, feed composition and mole percent level thereof are MgTiNb
2O
8
Its preparation process is following:
(1) with raw material MgO, Nb
2O
5, TiO
2Press MgTiNb respectively
2O
8The chemical formula weigh batching;
(2) the above-mentioned chemical feedstocks that configures is mixed, put into ball grinder, add zirconia ball and deionized water, raw material: deionized water: the mass ratio of zirconium ball is 1: 1: 1.2, and ball milling 1～12 hour is dried the raw material behind the ball milling in infrared drying oven, sieve;
(3) powder that step (2) is mixed is calcined 3 hours synthetic frits at 780 ℃;
(4) be that 0.35～0.75% Z 150PH is put into ball grinder with adding mass percent in step (3) frit, add zirconia ball and deionized water, ball milling 4～8 hours sieves after the oven dry, is pressed into the cylinder shape base substrate of Φ 10mm * 5mm again with powder compressing machine;
(5) with step (4) cylinder shape base substrate in 1100～1200 ℃ of sintering 2～6 hours, make MgTiNb
2O
8Microwave-medium ceramics;
(6) with the microwave dielectric property of network analyzer test microwave-medium ceramics.
2. according to the intermediate sintering temperature microwave-medium ceramics of claim 1, it is characterized in that the raw material of said step (1) is a purity greater than 99.9% analytical pure raw material.
3. according to the intermediate sintering temperature microwave-medium ceramics of claim 1, it is characterized in that the raw material behind the ball milling of said step (2) is 100～120 ℃ of oven dry in infrared drying oven.
4. according to the intermediate sintering temperature microwave-medium ceramics of claim 1, it is characterized in that the base substrate of said step (4) is the cylinder shape base substrate of Φ 10mm * 5mm, the gauge pressure of tabletting machine is 6～10MPa.
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|---|---|---|---|
| CN2012100973806A CN102617141A (en) | 2012-04-05 | 2012-04-05 | Intermediate-temperature sintered microwave dielectric ceramic |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100973806A CN102617141A (en) | 2012-04-05 | 2012-04-05 | Intermediate-temperature sintered microwave dielectric ceramic |
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|---|---|
| CN102617141A true CN102617141A (en) | 2012-08-01 |
Family
ID=46557416
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|---|---|---|---|
| CN2012100973806A Pending CN102617141A (en) | 2012-04-05 | 2012-04-05 | Intermediate-temperature sintered microwave dielectric ceramic |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110655402A (en) * | 2019-10-14 | 2020-01-07 | 天津大学 | Medium-temperature sintered rutile-like microwave dielectric ceramic material |
| CN110818412A (en) * | 2019-10-14 | 2020-02-21 | 天津大学 | Titanium-based non-stoichiometric microwave dielectric ceramic material |
| CN114751734A (en) * | 2022-04-29 | 2022-07-15 | 电子科技大学 | Dielectric material for low-temperature sintered Mg-Ti-Nb multilayer ceramic capacitor and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1761004A (en) * | 2005-11-16 | 2006-04-19 | 天津大学 | High frequency thermostable porcelain of capacitor, and preparation method |
| CN101531528A (en) * | 2009-04-13 | 2009-09-16 | 天津大学 | Method for preparing magnesium niobate microwave ceramic powder on the basis of sol-gel technique |
| CN101857435A (en) * | 2010-06-11 | 2010-10-13 | 天津大学 | Medium-temperature sintered composite niobate high-frequency medium ceramic and preparation method thereof |
-
2012
- 2012-04-05 CN CN2012100973806A patent/CN102617141A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1761004A (en) * | 2005-11-16 | 2006-04-19 | 天津大学 | High frequency thermostable porcelain of capacitor, and preparation method |
| CN101531528A (en) * | 2009-04-13 | 2009-09-16 | 天津大学 | Method for preparing magnesium niobate microwave ceramic powder on the basis of sol-gel technique |
| CN101857435A (en) * | 2010-06-11 | 2010-10-13 | 天津大学 | Medium-temperature sintered composite niobate high-frequency medium ceramic and preparation method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110655402A (en) * | 2019-10-14 | 2020-01-07 | 天津大学 | Medium-temperature sintered rutile-like microwave dielectric ceramic material |
| CN110818412A (en) * | 2019-10-14 | 2020-02-21 | 天津大学 | Titanium-based non-stoichiometric microwave dielectric ceramic material |
| CN114751734A (en) * | 2022-04-29 | 2022-07-15 | 电子科技大学 | Dielectric material for low-temperature sintered Mg-Ti-Nb multilayer ceramic capacitor and preparation method thereof |
| CN114751734B (en) * | 2022-04-29 | 2023-07-28 | 电子科技大学 | Dielectric material for low-temperature sintered Mg-Ti-Nb multilayer ceramic capacitor and preparation method thereof |
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Application publication date: 20120801 |
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