CN109111226A - NaCa2Mg2V3O12The preparation method of microwave dielectric ceramic - Google Patents
NaCa2Mg2V3O12The preparation method of microwave dielectric ceramic Download PDFInfo
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- C04B35/495—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on vanadium, niobium, tantalum, molybdenum or tungsten oxides or solid solutions thereof with other oxides, e.g. vanadates, niobates, tantalates, molybdates or tungstates
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Abstract
The invention discloses a kind of NaCa2Mg2V3O12The preparation method of microwave dielectric ceramic.By NaCa2Mg2V3O12Stoichiometric ratio ingredient, it then is that 1:2:1 sequentially adds zirconia ball and dehydrated alcohol into mixed powder according to mixed powder, zirconia ball and dehydrated alcohol mass ratio, ball milling 4 hours, then it is dried at 100 ~ 120 DEG C, powder after drying is handled with the sieve sieving of 200 mesh, then being directly compressed into diameter is 12mm, the cylindric sample with a thickness of 6mm;Then sample is warming up to 775 ~ 875 DEG C with the heating rate of 5 DEG C/min, and the temperature is kept to be sintered 4 hours, obtain NaCa2Mg2V3O12Microwave dielectric ceramic.For the method for the present invention compared to traditional solid reaction process, successfully preparing in the case where saving the series of steps such as pre-burning, secondary ball milling, granulation and dumping has fine and close microstructure, higherQ×fValue and nearly zero τ f The microwave-medium ceramics of value.It ensure that the performance of material while further reducing the cost, simplifying experimental implementation, there is certain application potential.
Description
Technical field
The invention belongs to electronic ceramics and its manufacturing field, in particular to a kind of NaCa2Mg2V3O12Microwave dielectric ceramic
Preparation method.Resonator, filter, diectric antenna, the medium that the microwave dielectric ceramic can be used in using in microwave frequency band are led
The microwave devices dielectric ceramic material such as wave circuit.
Background technique
Microwave dielectric material, which refers to, medium and completes one kind applied to being used as in microwave frequency band (300MHz ~ 300GHz) circuit
Or the ceramics of multiple functions, mainly for the preparation of microwave devices such as resonator, filter, diectric antenna, dielectric guided wave circuits.
In recent years, as microwave device is constantly to cost effective, miniaturization and the development in lightweight direction, it is desirable that microwave-medium material
Material has excellent microwave dielectric property (sintering temperature and low, heightQ×fValue, low-k and nearly zeroτ f Value), low life
Cost is produced to guarantee the transmission speed and temperature stability of signal.In recent years, many vanadium base microwave medium ceramic materials obtain
Extensive research, such as Mg2V207, R2V2O7(R=Ba, Sr, Ca) and Ca5A4(VO4)6 (A2+=Mg, Zn), these ceramics are not only
It with good microwave property, and can be sintered at low temperature, but preparation cost is higher, experimental procedure is cumbersome limits it
Application commercially.Therefore, find low cost, reaction sintering easy to operate prepare vanadium base microwave medium ceramic material with
Reducing cost can yet be regarded as a kind of new selection.Compared to traditional solid reaction process, reaction sintering is saving pre-burning, secondary ball
Mill, be granulated and the series of steps such as dumping in the case where successfully prepare there is fine and close microstructure, higherQ×fIt is worth and close
Zero τ f The microwave-medium ceramics of value.
NaCa2Mg2V3O12Ceramics have excellent microwave dielectric property (Q×f=25,924 GHz, ε r =7.1, τ f =5.8
ppm/oC).The reaction sintering that the present invention uses eliminates pre-burning, secondary ball milling, granulation compared to traditional solid reaction process
It with the series of steps such as dumping, further decreases production cost, simplify preparation process, be its commercially extensive and persistence
Applications expanding road.
Summary of the invention
NaCa is prepared using reaction sintering the object of the present invention is to provide a kind of2Mg2V3O12The side of microwave dielectric ceramic
Method.
Specific steps are as follows:
(1) with the Na of purity >=99%2CO3、CaCO3, MgO and V2O5High-purity powder is that raw material presses NaCa2Mg2V3O12Chemistry meter
Amount obtains mixed powder, the ratio for being then 1:2:1 according to mixed powder, zirconia ball and dehydrated alcohol mass ratio than carrying out weighing
Example sequentially adds zirconia ball and dehydrated alcohol into mixed powder, ball milling 4 hours, then dries at 100 ~ 120 DEG C, dries
Powder afterwards is handled with the sieve sieving of 200 mesh.
(2) by powder obtained in step (1) be directly compressed into the case where no pre-burning diameter be 12mm, with a thickness of
The cylindric sample of 6mm;Then sample is warming up to 775 ~ 875 DEG C with the heating rate of 5 DEG C/min, and the temperature is kept to be sintered
4 hours, obtain NaCa2Mg2V3O12Microwave dielectric ceramic.
The reaction sintering that the present invention uses is saving pre-burning, secondary ball milling, granulation compared to traditional solid reaction process
There is fine and close microstructure, higher with successfully preparing two kinds in the case where the series of steps such as dumpingQ×fValue and nearly zero τ f
The microwave-medium ceramics of value.It ensure that the performance of material while further reducing the cost, simplifying experimental implementation, have certain
Application potential.
Specific embodiment
Embodiment 1:
(1) Na for being 99% with purity2CO3、CaCO3, MgO and V2O5High-purity powder is that raw material presses NaCa2Mg2V3O12Chemistry meter
Amount obtains mixed powder, the ratio for being then 1:2:1 according to mixed powder, zirconia ball and dehydrated alcohol mass ratio than carrying out weighing
Example sequentially adds zirconia ball and dehydrated alcohol into mixed powder, ball milling 4 hours, then dries at 110 DEG C, after drying
Powder is handled with the sieve sieving of 200 mesh.
(2) by powder obtained in step (1) be directly compressed into the case where no pre-burning diameter be 12mm, with a thickness of
The cylindric sample of 6mm;Then sample is warming up to 775 DEG C with the heating rate of 5 DEG C/min, and keeps temperature sintering 4 small
When, obtain NaCa2Mg2V3O12Microwave dielectric ceramic.
Embodiment 2 ~ 5:
In addition to by the sintering temperature in step (2) according to being adjusted in table 1 other than, the preparation step of embodiment 2 ~ 5 is the same as implementing
Example 1, specific sintering temperature are shown in Table 1.With cylindrical dielectric resonator method to LiCa made from embodiment 1 ~ 53ZnV3O12Micro-wave dielectric
Ceramics carry out the evaluation of microwave dielectric property, and concrete outcome is shown in Table 1.
From experimental data it can be seen that this ceramics can be widely applied for the microwaves such as various medium substrates, antenna and filter electricity
The manufacture of sub- component meets the technology needs of Modern Mobile Communications Systems.
The design parameter of 1 embodiment 1 ~ 5 of table
Claims (1)
1. a kind of NaCa2Mg2V3O12The preparation method of microwave dielectric ceramic, it is characterised in that specific steps are as follows:
(1) with the Na of purity >=99%2CO3、CaCO3, MgO and V2O5High-purity powder is that raw material presses NaCa2Mg2V3O12Stoichiometry
Than carrying out weighing, mixed powder is obtained, the ratio for being then 1:2:1 according to mixed powder, zirconia ball and dehydrated alcohol mass ratio
Zirconia ball and dehydrated alcohol are sequentially added into mixed powder, ball milling 4 hours, are then dried at 100 ~ 120 DEG C, after drying
Powder handled with the sieve sievings of 200 mesh;
(2) powder obtained in step (1) is directly compressed into diameter in the case where no pre-burning is 12mm, with a thickness of 6mm
Cylindric sample;Then sample is warming up to 775 ~ 875 DEG C with the heating rate of 5 DEG C/min, and keeps temperature sintering 4 small
When, obtain NaCa2Mg2V3O12Microwave dielectric ceramic.
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110357628A (en) * | 2019-08-01 | 2019-10-22 | 电子科技大学 | A kind of Ca5Mg4-xCox(VO4)6Low temperature sintering microwave ceramic material and preparation method thereof |
CN112830515A (en) * | 2021-01-19 | 2021-05-25 | 大连理工大学 | NaMg with octahedral structure4V3O12Method for producing a material |
CN113024249A (en) * | 2021-03-29 | 2021-06-25 | 三峡大学 | Microwave dielectric ceramic composite material and preparation method thereof |
Citations (4)
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US5133129A (en) * | 1988-12-27 | 1992-07-28 | At&T Bell Laboratories | Methods of producing microwave device |
CN102153343A (en) * | 2011-01-10 | 2011-08-17 | 天津大学 | Method for preparing high Q-value magnesium titanate base microwave medium ceramics by adopting reactive sintering method |
CN102861569A (en) * | 2012-10-17 | 2013-01-09 | 桂林理工大学 | Visible light responsive vanadium-containing garnet structural oxide photocatalyst and preparation method thereof |
CN102887708A (en) * | 2012-10-17 | 2013-01-23 | 桂林理工大学 | Microwave dielectric ceramic NaCa2(Mg1-xZnx)2V3O12 capable of sintering at low temperature and preparation method |
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2018
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US5133129A (en) * | 1988-12-27 | 1992-07-28 | At&T Bell Laboratories | Methods of producing microwave device |
CN102153343A (en) * | 2011-01-10 | 2011-08-17 | 天津大学 | Method for preparing high Q-value magnesium titanate base microwave medium ceramics by adopting reactive sintering method |
CN102861569A (en) * | 2012-10-17 | 2013-01-09 | 桂林理工大学 | Visible light responsive vanadium-containing garnet structural oxide photocatalyst and preparation method thereof |
CN102887708A (en) * | 2012-10-17 | 2013-01-23 | 桂林理工大学 | Microwave dielectric ceramic NaCa2(Mg1-xZnx)2V3O12 capable of sintering at low temperature and preparation method |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110357628A (en) * | 2019-08-01 | 2019-10-22 | 电子科技大学 | A kind of Ca5Mg4-xCox(VO4)6Low temperature sintering microwave ceramic material and preparation method thereof |
CN112830515A (en) * | 2021-01-19 | 2021-05-25 | 大连理工大学 | NaMg with octahedral structure4V3O12Method for producing a material |
CN112830515B (en) * | 2021-01-19 | 2022-04-12 | 大连理工大学 | NaMg with octahedral structure4V3O12Method for producing a material |
CN113024249A (en) * | 2021-03-29 | 2021-06-25 | 三峡大学 | Microwave dielectric ceramic composite material and preparation method thereof |
CN113024249B (en) * | 2021-03-29 | 2022-04-22 | 三峡大学 | Microwave dielectric ceramic composite material and preparation method thereof |
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