CN107266074B - A kind of microwave ceramic material and preparation method thereof - Google Patents
A kind of microwave ceramic material and preparation method thereof Download PDFInfo
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Abstract
The present invention provides a kind of microwave ceramic materials, comprising: oxide shown in solid solution shown in formula (I) and formula (II)；(BaZn1/3Ta2/3O3)1‑x·(BaRO3)xFormula (I)；WmOnFormula (II)；Wherein, R is selected from one of Ti, Sn and Zr or a variety of；W is selected from one of V, Mn, Nb and Ta or a variety of；0.01≤x≤0.05；1≤m≤2,2≤n≤5.Microwave ceramic material provided by the invention includes (BaZn1/3Ta2/3O3)1‑x·(BaRO3)xSolid solution, then by by WmOnOxide-doped mixture prepared ceramic material Q value is high, and frequency-temperature coefficient is adjustable, and the process conditions for preparing requirement are low, and loss is low, and dielectric properties are good.The experimental results showed that the microwave ceramics permittivity ε that microwave ceramic material of the present invention is preparedrIt is 29~31, temperature coefficient of resonance frequency τfIt is+0.5~+9ppm/ DEG C, QfFor 110000~160000GHz.
Description
Technical field
The present invention relates to technical field of ceramic material, more particularly, to a kind of microwave ceramic material and preparation method thereof.
Background technique
With a series of fast development of high and new technologies, the communication technology also improves constantly, especially mobile communication, defend
The modern communications such as star communication, GPS (GPS, Bluetooth technology and WLAN) are developed rapidly,
The demand of the microwave dielectric properties material of high-performance, high-quality is increasingly increased.Domestic Mobile Communication Market speed
The first in the world is occupied, mobile phone user's number and network capacity are huge, and microwave base station emits in GSM cellular communication system
Machine, receiver and mobile phone are required to the microwave-medium ceramics such as a large amount of resonator, filter, oscillator, diectric antenna
Material.The very high frequency of microwave signal, wavelength is extremely short, and information capacity is big, there is highly directive, penetrability and absorbability, and
Microwave equipment can realize the confidentiality of communication, be advantageous to the application in field of communication technology and military field.Microwave pottery
Porcelain can be applied to make in microwave frequency band (mainly UHF, SHF frequency range) circuit as one of modern communications critical material
For dielectric material.Due to the microwave devices such as microwave-medium ceramics dielectric resonator have small in size, light weight, performance it is stable,
The disadvantages of the advantages that cheap, it overcomes the volume and excessive weight of traditional Metal cavity and metal waveguide, favorably
In integrated, the modularization of microwave circuit, rapidly developed during the last ten years nearly two, and China early has become mobile communication
With the biggest market of microwave-medium component.
The performance of evaluation microwave-medium ceramics mainly has permittivity ε, the product of quality factor (Q) and resonance frequency (f)
Qf value and temperature coefficient of resonance frequency τ f.Wherein, temperature coefficient of resonance frequency refers to the temperature stability of resonance frequency, with logical
The rapid development of letter technology is brought to microwave dielectric material increasingly higher demands, and the nearly zero single frequency-temperature coefficient of tradition is not
It can meet the requirements well, therefore increasingly wider frequency-temperature coefficient adjustable extent more shows its necessity.
The prior art is in existing high q-factor microwave ceramic material, A (B '1/3B″2/3)O3Serial niobium tantalate microwave ceramics
There is extremely low dielectric loss, Q under very high microwave frequencyfIt is worth up to 100,000 or more, BaZn1/3Ta2/3O3It is one of
Typical material, and more and comparative maturity the typical high q-factor material of research.But high sintering temperature (1600 DEG C of >) makes
The material is difficult to be sintered, and Zn is easy to volatilize the dielectric properties of material is caused to deteriorate in high-temperature sintering process, therefore has
Close BaZn1/3Ta2/3O3Doping vario-property research become the field research hotspot.It can get by a series of doping of sintering aids
Stablize high q-factor, however in face of frequency-temperature coefficient requirement increasingly wider to high q-factor microwave material in the market, it be existing micro-
Its temperature coefficient of resonance frequency is arbitrarily adjusted in wave media ceramic and high quality factor is kept then to seem extremely difficult.
Summary of the invention
In view of this, the technical problem to be solved in the present invention is that provide a kind of microwave ceramic material, it is provided by the invention
Microwave ceramic material low-loss, high q-factor, and frequency-temperature coefficient is adjustable.
The present invention provides a kind of microwave ceramic materials, comprising: aoxidizes shown in solid solution shown in formula (I) and formula (II)
Object；
(BaZn1/3Ta2/3O3)1-x·(BaRO3)xFormula (I)；
WmOnFormula (II)；
Wherein, R is selected from one of Ti, Sn and Zr or a variety of；W is selected from one of V, Mn, Nb and Ta or a variety of；0.01
≤x≤0.05；1≤m≤2,2≤n≤5.
Preferably, 0.01≤x≤0.04.
Preferably, it is 0.1%~0.5% that oxide shown in the formula (II), which accounts for the mass percent of mixture,.
The present invention provides a kind of preparation methods of microwave ceramic material as described in the above technical scheme, including walk as follows
It is rapid:
A) by BaCO3、ZnO、Ta2O5、RO2It proportionally mixes, ball milling, pre-burning obtains solid solution；The BaCO3、ZnO、
Ta2O5And RO2Mixing molar ratio be 3:(1-x): (1-x): 3x；
B) by the solid solution and WmOnMixing, ball milling, drying obtain mixture.
Preferably, step A) revolving speed of the ball milling is 1500r/min~1800r/min, the time of the ball milling is 4h
~8h.
Preferably, step A) temperature of the pre-burning is 1200 DEG C~1350 DEG C；The time of pre-burning is 2~6h.
Preferably, step B) revolving speed of the ball milling is 1500r/min~1800r/min, the time of the ball milling is 4h
~8h.
Preferably, step B) temperature of the drying is 90~98 DEG C；The time of drying is 6~10h.
The present invention provides a kind of preparation methods of microwave ceramics, include the following steps:
A) by BaCO3、ZnO、Ta2O5、RO2It proportionally mixes, ball milling, pre-burning obtains solid solution；The BaCO3、ZnO、
Ta2O5And RO2Mixing molar ratio be 3:(1-x): (1-x): 3x；
B) by the solid solution and WmOnMixing, ball milling, drying obtain mixture；
C) mixture is mixed with binder drying, compacting, sintering obtain microwave ceramics.
Preferably, step C) temperature of the sintering is 1560~1630 DEG C；The time of the sintering is 4~10h.
Compared with prior art, the present invention provides a kind of microwave ceramic materials, comprising: solid solution shown in formula (I) and
Oxide shown in formula (II)；(BaZn1/3Ta2/3O3)1-x·(BaRO3)xFormula (I)；WmOnFormula (II)；Wherein, R be selected from Ti, Sn and
One of Zr or a variety of；W is selected from one of V, Mn, Nb and Ta or a variety of；0.01≤x≤0.05；1≤m≤2,2≤n≤
5.Microwave ceramic material provided by the invention includes (BaZn1/3Ta2/3O3)1-x·(BaRO3)xSolid solution, then by by WmOnOxygen
Compound adulterates mixture prepared ceramic material Q value height, and frequency-temperature coefficient is adjustable, prepares the technique item of requirement
Part is low, and loss is low, and dielectric properties are good.The experimental results showed that the microwave ceramics that microwave ceramic material of the present invention is prepared is situated between
Electric constant εrIt is 29~31, temperature coefficient of resonance frequency τfIt is+0.5~+9ppm/ DEG C, QfFor 110000~160000GHz.
Specific embodiment
The present invention provides a kind of microwave ceramic materials, comprising: aoxidizes shown in solid solution shown in formula (I) and formula (II)
Object；
(BaZn1/3Ta2/3O3)1-x·(BaRO3)xFormula (I)；
WmOnFormula (II)；
Wherein, R is selected from one of Ti, Sn and Zr or a variety of；W is selected from one of V, Mn, Nb and Ta or a variety of；0.01
≤x≤0.05；1≤m≤2,2≤n≤5.
Microwave ceramic material of the present invention is microwave ceramics powder well known to those skilled in the art；To prepare microwave pottery
The raw material of porcelain can be used for preparing microwave ceramics after sintering.
Microwave ceramic material provided by the invention is the mixing of oxide shown in solid solution shown in formula (I) and formula (II)
Object.
Wherein, (BaZn1/3Ta2/3O3)1-x·(BaRO3)xFormula (I)；R is selected from one of Ti, Sn and Zr or a variety of；0.01
≤x≤0.05；Preferably, 0.01≤x≤0.04；It is furthermore preferred that 0.01≤x≤0.035；Most preferably, 0.01≤x≤
0.03。
WmOnFormula (II)；
W is selected from one of V, Mn, Nb and Ta or a variety of；1≤m≤2,2≤n≤5.
Wherein, it is preferably 0.1%~0.5% that oxide shown in the formula (II), which accounts for the mass percent of mixture,；More
Preferably 0.2%~0.4%.
Wherein, solid solution shown in formula (I) is perovskite material, BaZn1/3Ta2/3O3It is moderate for dielectric constant, pole is lost
Low, temperature coefficient of resonance frequency levels off to 0；And BaRO3It is higher for temperature coefficient of resonance frequency, it is lost moderate with dielectric constant.
The present invention is by specifically proportion so that the two solid solution, finally passes through W againmOnDoping, the ceramic material product being finally prepared
Prime factor Q value is high, and frequency-temperature coefficient is adjustable, and the process conditions for preparing requirement are low, and loss is low, and dielectric properties are good.It can use
In information functional material technical field.
In a portion embodiment of the present invention, microwave ceramic material is (BaZn1/3Ta2/3O3)0.99·(BaSnO3)0.01
And TiO2Mixture；
In a portion embodiment of the present invention, microwave ceramic material is (BaZn1/3Ta2/3O3)0.98·(BaZrO3)0.02
And TiO2Mixture；
In a portion embodiment of the present invention, microwave ceramic material is (BaZn1/3Ta2/3O3)0.985·(BaTiO3)0.015
And TiO2、V2O5Mixture；
In a portion embodiment of the present invention, microwave ceramic material is (BaZn1/3Ta2/3O3)0.985·
(BaTiO3)0.0155And MnO2、Nb2O5Mixture；
In a portion embodiment of the present invention, microwave ceramic material is (BaZn1/3Ta2/3O3)0.985·(BaTiO3)0.015
And Nb2O5Mixture；
In a portion embodiment of the present invention, microwave ceramic material is (BaZn1/3Ta2/3O3)0.97·(BaTiO3)0.03
And Ta2O5Mixture.
The present invention provides a kind of preparation methods of microwave ceramic material as described in the above technical scheme, including walk as follows
It is rapid:
A) by BaCO3、ZnO、Ta2O5、RO2It proportionally mixes, ball milling, pre-burning obtains solid solution；The BaCO3、ZnO、
Ta2O5And RO2Mixing molar ratio be 3:(1-x): (1-x): 3x；
B) by the solid solution and WmOnMixing, ball milling, drying obtain mixture.
The raw material that the preparation method of microwave ceramic material provided by the invention uses is BaCO3、ZnO、Ta2O5、RO2, by upper
The microwave ceramic material that the method for stating is prepared is hopcalite shown in solid solution shown in formula (I) and formula (II).
According to the present invention, due to differences such as the content of raw material, proportions, so that the chemical formula of said mixture and composition occur
Variation, obtains different ceramic materials.
According to the present invention, first by BaCO3、ZnO、Ta2O5、RO2Proportionally mix.The BaCO3、ZnO、Ta2O5With
RO2Mixing molar ratio be 3:(1-x): (1-x): 3x；Wherein, 0.01≤x≤0.05；Preferably, 0.01≤x≤0.04；More
Preferably, 0.01≤x≤0.035；Most preferably, 0.01≤x≤0.03.R is selected from one of Ti, Sn and Zr or a variety of.
The present invention is for above-mentioned BaCO3、ZnO、Ta2O5、RO2Source without limit, can be commercially available.
Ball milling after mixing, the present invention for the ball milling concrete mode without limit, preferably in high energy ball mill
Ball milling；The revolving speed of the ball milling is preferably 1500r/min~1800r/min, more preferably 1600r/min~1800r/min, most
Preferably 1600r/min~1700r/min, the time of the ball milling are preferably 4h~8h；More preferably 4h~6h.
Raw material can be uniformly mixed by the ball milling.It preferably dries, grind, being sieved after ball milling.
The present invention for it is described drying, grinding concrete mode without limit, it is well known to those skilled in the art.
In the present invention, the temperature of the drying is preferably 80~98 DEG C；More preferably 90~98 DEG C；Most preferably 95~
98℃；The time of the drying is preferably 6~10h；More preferably 6~8h.
The time of the grinding is preferably 4 hours, and be sieved 100 mesh.
Solid solution is obtained through pre-burning after grinding.The temperature of pre-sintering of the present invention is preferably 1200 DEG C~1350 DEG C；More
Preferably 1200 DEG C~1300 DEG C；The time of the pre-burning is preferably 2~6h；More preferably 2~5h.
After obtaining solid solution, by the solid solution and WmOnMixing, ball milling, drying obtain mixture.
Wherein WmOnThe mass percent for accounting for the solid solution is preferably 0.1%~0.5%；More preferably 0.2%~
0.4%.
The present invention for the hybrid mode without limit, it is well known to those skilled in the art.
Mixing after be ball milling, the present invention for the ball milling concrete mode without limit, preferably in high-energy ball milling
Ball milling in machine；The revolving speed of the ball milling is preferably 1500r/min~1800r/min, more preferably 1600r/min~1800r/
Min, most preferably 1600r/min~1700r/min, the time of the ball milling are preferably 4h~8h；More preferably 4h~6h.
Be drying after ball milling, the present invention for the drying concrete mode without limiting, those skilled in the art are ripe
Know.
In the present invention, the temperature of the drying is preferably 80~98 DEG C；More preferably 90~98 DEG C；Most preferably 95~
98℃；The time of the drying is preferably 6~10h；More preferably 6~8h.
What is obtained after drying is microwave ceramic material, can further be sintered to obtain microwave ceramics.
The present invention provides a kind of preparation methods of microwave ceramics, include the following steps:
A) by BaCO3、ZnO、Ta2O5、RO2It proportionally mixes, ball milling, pre-burning obtains solid solution；The BaCO3、ZnO、
Ta2O5And RO2Mixed proportion be 3:(1-x): (1-x): 3x；
B) by the solid solution and WmOnMixing, ball milling, drying obtain mixture；
C) mixture is mixed with binder drying, compacting, sintering obtain microwave ceramics.
Step A) and step B) it is above-mentioned be clearly described, details are not described herein.
After obtaining mixture, the mixture is mixed with binder to drying, compacting, sintering obtain microwave ceramics.
In the present invention, the binder includes but is not limited to polyvinyl alcohol；The additive amount of the binder is preferably mixed
The 10%~15% of polymer weight；More preferably 11%~14%；Most preferably 12%~13%.
Be drying after mixing, the present invention for the drying concrete mode without limiting, those skilled in the art are ripe
Know.
According to the present invention, the temperature of the drying is preferably 80~98 DEG C；More preferably 90~98 DEG C；Most preferably 95~
98℃；The time of the drying is preferably 6~10h；More preferably 6~8h.
Be compacting after drying, the present invention for the drying concrete mode without limiting, those skilled in the art are ripe
Know.It is preferred that compacting obtains green body cylinders on press.
After obtaining green body, microwave ceramics is obtained through sintering.
According to the present invention, the temperature of the sintering is preferably 1560~1630 DEG C；More preferably 1560~1620 DEG C；It is optimal
It is selected as 1560~1600 DEG C；The time of the sintering is preferably 4~10h；More preferably 4~8h；Most preferably 4~7h.
The present invention first synthesizes (BaZn1/3Ta2/3O3)1-x-(BaRO3)xThen (W is added in powdermOn)yPowder is mixed,
Polyvinyl alcohol is added uniformly in final gained powder and is pressed into cylindric green body, then is carrying out being sintered at high temperature into porcelain,
High quality factor and the adjustable microwave ceramics of frequency-temperature coefficient can be obtained.The microwave ceramics that the present invention is prepared, relatively
In traditional BaZn1/3Ta2/3O3Microwave ceramics, preparation condition require it is low, with lower sintering temperature and when shorter sintering
Between, and it is not necessarily to subsequent heat treatment technique.Microwave ceramics quality factor of the invention is higher simultaneously, temperature coefficient of resonance frequency can
Tune, loss are lower, and performance test shows that preferable microwave dielectric property: permittivity ε can be obtainedrBetween 29~31, resonance
Frequency-temperature coefficient τffBetween+0.5~+9ppm/ DEG C, the product Q of quality factor and resonance frequencyfBetween 100000~
140000GHz.BaZn can be substituted1/3Ta2/3O3System is used to prepare more different one required in terms of temperature stability
Serial microwave ceramics.
In order to further illustrate the present invention, with reference to embodiments to microwave ceramic material provided by the invention and its preparation
Method is described in detail.
Embodiment 1
By BaCO3、ZnO、Ta2O5、SnO2It proportionally mixes, the 1500r/min ball milling 6h ball milling in high energy ball mill,
98 DEG C of 6h drying, grinding, 1200 DEG C of pre-sinterings obtain solid solution；The BaCO3、ZnO、Ta2O5And SnO2Mixed proportion be
3:0.99:0.99:0.03；By the solid solution and 0.3wt%TiO2Mixing, 1500r/min secondary ball milling 6h, 98 DEG C of 6h bakings
It is dry, obtain mixture；The mixture is mixed into drying with 10%wt% polyvinyl alcohol adhesive, circle is pressed on press
Cylindricality green body obtains microwave ceramics using 1600 DEG C of sintering 6h.At this point, the main component of microwave ceramics is (BaZn1/3Ta2/ 3O3)0.99·(BaSnO3)0.01And TiO2。
After measured, the performance data for the microwave ceramics that the embodiment of the present invention and comparative example are prepared is as shown in table 1.
Embodiment 2
By BaCO3、ZnO、Ta2O5、SnO2、ZrO2It proportionally mixes, the 1600r/min ball milling 6h ball in high energy ball mill
Mill, 95 DEG C of 7h drying, grinding, 1200 DEG C of pre-sinterings obtain solid solution；The BaCO3、ZnO、Ta2O5(SnO2、ZrO2) it is mixed
Composition and division in a proportion example is 3:0.98:0.98:0.06；By the solid solution and 0.3wt%TiO2Mixing, 1600r/min secondary ball milling 6h, 98
DEG C 6h drying, obtains mixture；The mixture is mixed into drying with 10%wt% polyvinyl alcohol adhesive, is pressed on press
Green body cylinders are made, obtain microwave ceramics using 1580 DEG C of sintering 7h.At this point, the main component of microwave ceramics is
(BaZn1/3Ta2/3O3)0.98·(BaZrO3)0.02And TiO2。
After measured, the performance data for the microwave ceramics that the embodiment of the present invention and comparative example are prepared is as shown in table 1.
Embodiment 3
By BaCO3、ZnO、Ta2O5、TiO2And ZrO2It proportionally mixes, the 1800r/min ball milling 6h in high energy ball mill
Ball milling, 95 DEG C of 7h drying, grinding, 1300 DEG C of pre-sinterings obtain solid solution；The BaCO3、ZnO、Ta2O5、(TiO2And ZrO2)
Mixed proportion is 3:0.985:0.985:0.045；By the solid solution and 0.2wt%TiO2And 0.2wt%V2O5Mixing,
1800r/min secondary ball milling 6h, 98 DEG C of 6h drying obtain mixture；The mixture and 15%wt% polyvinyl alcohol are bonded
Agent mixing drying, green body cylinders are pressed on press, obtain microwave ceramics using 1570 DEG C of sintering 8h.At this point, micro-
The main component of wave ceramics is (BaZn1/3Ta2/3O3)0.985·(BaTiO3)0.015And TiO2、V2O5。
After measured, the performance data for the microwave ceramics that the embodiment of the present invention and comparative example are prepared is as shown in table 1.
Embodiment 4
By BaCO3、ZnO、Ta2O5、TiO2It proportionally mixes, the 1800r/min ball milling 6h ball milling in high energy ball mill,
96 DEG C of 8h drying, grinding, 1320 DEG C of pre-sinterings obtain solid solution；The BaCO3、ZnO、Ta2O5、TiO2Mixed proportion be 3:
0.985:0.985:0.045；By the solid solution and 0.2wt%MnO2And 0.3wt%Nb2O5Mixing, 1800r/min secondary ball
6h is ground, 98 DEG C of 6h drying obtain mixture；The mixture is mixed into drying with 15%wt% polyvinyl alcohol adhesive, is being pressed
Green body cylinders are pressed on machine processed, obtain microwave ceramics using 1610 DEG C of sintering 8h.At this point, the main component of microwave ceramics
For (BaZn1/3Ta2/3O3)0.985·(BaTiO3)0.0155And MnO2、Nb2O5。
After measured, the performance data for the microwave ceramics that the embodiment of the present invention and comparative example are prepared is as shown in table 1.
Embodiment 5
By BaCO3、ZnO、Ta2O5、TiO2、SnO2It proportionally mixes, the 1800r/min ball milling 6h ball in high energy ball mill
Mill, 96 DEG C of 8h drying, grinding, 1320 DEG C of pre-sinterings obtain solid solution；The BaCO3、ZnO、Ta2O5、(TiO2、SnO2) it is mixed
Composition and division in a proportion example is 3:0.985:0.985:0.045；By the solid solution and 0.2wt%Nb2O5Mixing, 1800r/min secondary ball milling
6h, 98 DEG C of 6h drying, obtains mixture；The mixture is mixed into drying with 15%wt% polyvinyl alcohol adhesive, is being suppressed
It is pressed into green body cylinders on machine, obtains microwave ceramics using 1595 DEG C of sintering 9h.At this point, the main component of microwave ceramics is
(BaZn1/3Ta2/3O3)0.985·(BaTiO3)0.015And Nb2O5。
After measured, the performance data for the microwave ceramics that the embodiment of the present invention and comparative example are prepared is as shown in table 1.
Embodiment 6
By BaCO3、ZnO、Ta2O5、TiO2、SnO2、ZrO2It proportionally mixes, the 1600r/min ball in high energy ball mill
6h ball milling is ground, 96 DEG C of 8h drying, grinding, 1320 DEG C are pre-sintered, and obtain solid solution；The BaCO3、ZnO、Ta2O5、(TiO2、
SnO2、ZrO2) mixed proportion be 3:0.97:0.97:0.09；By the solid solution and 0.2wt%Nb2O5、0.4wt%Ta2O5
Mixing, 1600r/min secondary ball milling 6h, 98 DEG C of 6h drying obtain mixture；By the mixture and 15%wt% polyvinyl alcohol
Binder mixing drying, green body cylinders are pressed on press, obtain microwave ceramics using 1620 DEG C of sintering 7h.This
When, the main component of microwave ceramics is (BaZn1/3Ta2/3O3)0.97·(BaTiO3)0.03And Ta2O5。
After measured, the performance data for the microwave ceramics that the embodiment of the present invention and comparative example are prepared is as shown in table 1.
Comparative example 1
By BaCO3、ZnO、Ta2O5It proportionally mixes, the 1600r/min ball milling 6h ball milling in high energy ball mill, 96 DEG C of 8h
Drying, grinding, 1320 DEG C of pre-sinterings obtain solid solution；The solid solution is mixed into baking with 15%wt% polyvinyl alcohol adhesive
It is dry, it is pressed into green body cylinders on press, obtains microwave ceramics using 1700 DEG C of sintering 7h.At this point, microwave ceramics
Main component is BaZn1/3Ta2/3O3。
After measured, the performance data for the microwave ceramics that the embodiment of the present invention and comparative example are prepared is as shown in table 1.
Comparative example 2
By BaCO3、ZnO、Ta2O5It proportionally mixes, the 1600r/min ball milling 6h ball milling in high energy ball mill, 96 DEG C of 8h
Drying, grinding, 1320 DEG C of pre-sinterings obtain solid solution；The BaCO3、ZnO、Ta2O5Mixed proportion be 3:0.97:0.97；
By the solid solution and 0.3wt%TiO2Mixing, 1600r/min secondary ball milling 6h, 98 DEG C of 6h drying obtain mixture；By institute
It states mixture and mixes drying with 15%wt% polyvinyl alcohol adhesive, green body cylinders are pressed on press, using
1670 DEG C of sintering 7h obtain microwave ceramics.At this point, the main component of microwave ceramics is BaZn1/3Ta2/3O3And TiO2。
After measured, the performance data for the microwave ceramics that the embodiment of the present invention and comparative example are prepared is as shown in table 1.
Table 1 is the performance data for the microwave ceramics that the embodiment of the present invention and comparative example are prepared
| Embodiment | εr | τf(ppm/℃) | Qf(GHz) |
| Embodiment 1 | 29 | +0.5 | 100000 |
| Embodiment 2 | 30.5 | +1 | 125000 |
| Embodiment 3 | 29 | +2 | 115000 |
| Embodiment 4 | 30 | +3.5 | 105000 |
| Embodiment 5 | 30 | +5 | 135000 |
| Embodiment 6 | 29.5 | +7 | 120000 |
| Comparative example 1 | 28 | +1 | 85000 |
| Comparative example 2 | 29 | +2.5 | 90000 |
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of microwave ceramic material characterized by comprising oxide shown in solid solution shown in formula (I) and formula (II)；
(BaZn1/3Ta2/3O3)1-x·(BaRO3)xFormula (I)；
WmOnFormula (II)；
Wherein, R is selected from one of Ti, Sn and Zr or a variety of；W is selected from one of V, Mn, Nb and Ta or a variety of；0.01≤x
≤0.05；1≤m≤2,2≤n≤5.
2. material according to claim 1, which is characterized in that 0.01≤x≤0.04.
3. material according to claim 1, which is characterized in that oxide shown in the formula (II) accounts for the quality of mixture
Percentage is 0.1%~0.5%.
4. a kind of preparation method of microwave ceramic material as described in claim 1, which comprises the steps of:
A) by BaCO3、ZnO、Ta2O5、RO2It proportionally mixes, ball milling, pre-burning obtains solid solution；The BaCO3、ZnO、Ta2O5
And RO2Mixing molar ratio be 3:(1-x): (1-x): 3x；
B) by the solid solution and WmOnMixing, ball milling, drying obtain mixture.
5. the preparation method according to claim 4, which is characterized in that step A) revolving speed of the ball milling is 1500r/min
~1800r/min, the time of the ball milling are 4h~8h.
6. the preparation method according to claim 4, which is characterized in that step A) temperature of the pre-burning is 1200 DEG C~
1350℃；The time of pre-burning is 2~6h.
7. the preparation method according to claim 4, which is characterized in that step B) revolving speed of the ball milling is 1500r/min
~1800r/min, the time of the ball milling are 4h~8h.
8. the preparation method according to claim 4, which is characterized in that step B) temperature of the drying is 90~98 DEG C；
The time of drying is 6~10h.
9. a kind of preparation method of microwave ceramics described in claim 1, which comprises the steps of:
A) by BaCO3、ZnO、Ta2O5、RO2It proportionally mixes, ball milling, pre-burning obtains solid solution；The BaCO3、ZnO、Ta2O5
And RO2Mixing molar ratio be 3:(1-x): (1-x): 3x；
B) by the solid solution and WmOnMixing, ball milling, drying obtain mixture；
C) mixture is mixed with binder drying, compacting, sintering obtain microwave ceramics；
Wherein, R is selected from one of Ti, Sn and Zr or a variety of；W is selected from one of V, Mn, Nb and Ta or a variety of；0.01≤x
≤0.05；1≤m≤2,2≤n≤5.
10. preparation method according to claim 9, which is characterized in that step C) temperature of the sintering is 1560~
1630℃；The time of the sintering is 4~10h.
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| CN2381030Y (en) * | 1999-04-05 | 2000-05-31 | 凯宣科技股份有限公司 | Improved dielectric resonon |
| CN1340477A (en) * | 2000-08-24 | 2002-03-20 | 阿莫泰克有限公司 | Manufacture method for dielectric ceramic composite |
| CN1398821A (en) * | 2001-07-16 | 2003-02-26 | 日本特殊陶业株式会社 | Dielectrical ceramic material |
| CN1453241A (en) * | 2003-05-23 | 2003-11-05 | 华中科技大学 | Composite microwave tuning strontium barium titanate ceramics |
| CN101423393A (en) * | 2008-12-09 | 2009-05-06 | 哈尔滨工业大学深圳研究生院 | Ba-Zn-Ta microwave ceramic medium and its preparing process |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2381030Y (en) * | 1999-04-05 | 2000-05-31 | 凯宣科技股份有限公司 | Improved dielectric resonon |
| CN1340477A (en) * | 2000-08-24 | 2002-03-20 | 阿莫泰克有限公司 | Manufacture method for dielectric ceramic composite |
| CN1398821A (en) * | 2001-07-16 | 2003-02-26 | 日本特殊陶业株式会社 | Dielectrical ceramic material |
| CN1453241A (en) * | 2003-05-23 | 2003-11-05 | 华中科技大学 | Composite microwave tuning strontium barium titanate ceramics |
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