CN104446465B - A kind of ceramic material and preparation method thereof, polytetrafluoroethylene (PTFE) ceramic composite and preparation method thereof and substrate - Google Patents
A kind of ceramic material and preparation method thereof, polytetrafluoroethylene (PTFE) ceramic composite and preparation method thereof and substrate Download PDFInfo
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Abstract
The invention provides a kind of ceramic material and preparation method thereof, the ceramic material has the formula shown in Formulas I.The invention provides a kind of polytetrafluoroethylene (PTFE) ceramic composite, prepared by ceramic powder and polytetrafluoroethylene (PTFE), the ceramic powder has the formula shown in Formulas I.The invention provides a kind of preparation method of polytetrafluoroethylene (PTFE) ceramic composite, including：In the presence of silane coupler, ceramic powder, polytetrafluoroethylene (PTFE) and demulsifier are mixed, polytetrafluoroethylene (PTFE) ceramic composite is obtained, the demulsifier includes alcohol compound or ether compound；The ceramic powder has the formula shown in Formulas I.The invention provides a kind of substrate, prepared by above-mentioned polytetrafluoroethylene (PTFE) ceramic composite.The polytetrafluoroethylene (PTFE) ceramic composite that the present invention is provided has higher dielectric constant, relatively low loss, and quality factor are higher, and with higher thermal conductivity.xLi2TiO3‑(1‑x)ZnNb2O6Formulas I.
Description
Technical field
The present invention relates to polytetrafluoroethylene (PTFE) technical field, more particularly to a kind of ceramic material and preparation method thereof, polytetrafluoro
Ethene-ceramic composite and preparation method thereof and substrate.
Background technology
With the fast development of field of wireless communication, the requirement more and more higher to electronic component, this is to high frequency material
Performance proposes higher requirement.At present, the high frequency substrate material of commercialization mainly has：Polytetrafluoroethylene (PTFE) (PTFE), polyphenyl
Ether (PPO), three kinds of materials of epoxy resin composite material (FR-4).Wherein, the application of polytetrafluoroethylmaterial material is wider, still
The dielectric constant of pure ptfe substrate is smaller, and quality factor are relatively low, and thermal conductivity is less than 1W/mK, it is difficult to use in high frequency.
In order to improve the dielectric constant of polytetrafluoroethylmaterial material, ROGERS CORPORATION of the U.S. is proposed using polytetrafluoroethylene (PTFE) as based composite fibre
The new type of substrate technology of cloth or composite ceramics, the substrate that this method is prepared is obtained widely in fields such as high-frequency microwaves
Using.
The Chinese patent of Application No. 201310378774.3 discloses a kind of polytetrafluoroethylene (PTFE) composite microwave ceramic substrate
Preparation method, comprise the following steps：1st, Zr-Ti based ceramic powder bodies are prepared；Including step in detail below：1-1, with ZrO2、
TiO2、Nb2O5, ZnO and MnCO3For raw material, according to Zr-Ti based ceramic powder body molecular formula (1-x) ZrTi2O6-xZnNb2O6(0.25
≤ x≤0.45) control ZrO2、TiO2、Nb2O5With ZnO mol ratio, then add equivalent to ZrO2、TiO2、Nb2O5It is total with ZnO
The MnCO of quality 0.1%~1.0%3；1-2, step 1-1 is prepared to raw material carry out first time ball milling, further mix raw material
Close uniform；1-3, that a ball milling material obtained by step 1-2 is sintered into 2 under air atmosphere and 1000 DEG C~1250 DEG C temperature conditionss is small
When~5 hours, obtain Zr-Ti base ceramic frits；1-4, Zr-Ti bases ceramic frit obtained by step 1-3 carried out second
Ball milling, drying, sieving, obtain Zr-Ti based ceramic powder body of the average grain diameter at 1 μm~4 μm；2nd, step 1 gained Zr-Ti bases are made pottery
Porcelain powder, adds the coupling agent added after absolute ethyl alcohol ultrasonic mixing after hydrolysis, continues ultrasonic mixing and causes idol for a period of time
Join the oh group of agent and occur abundant condensation reaction with the oh group in Zr-Ti based ceramic powder body surfaces face；3rd, will be anti-obtained by step 2
System is answered to add absolute ethyl alcohol ultrasonic mixing after drying, when then adding polytetrafluoroethylene (PTFE) dispersion emulsion and continuing one section of ultrasonic mixing
Between the organic molecule chain structure of the coupling agent other end is fully wound and is mixed with polytetrafluoroethylene (PTFE) strand；4th, by step 3 institute
Proper tie up at 90 DEG C carries out revolving demulsification processing, to remove absolute ethyl alcohol；5th, step 4 gained system is adopted and be washed with deionized water
Wash after being dried at 120 DEG C, obtain block polytetrafluoroethylene (PTFE) composite microwave ceramic material；6th, by block polytetrafluoro obtained by step 5
Ethene composite microwave ceramic material breaks into powder, is then placed in mould small in hot pressed sintering 1 hour~4 at 340 DEG C~380 DEG C
When, obtain final polytetrafluoroethylene (PTFE) composite microwave ceramic substrate.
Although the dielectric for the polytetrafluoroethylene (PTFE) composite microwave ceramic substrate that this method that prior art is provided is prepared
Constant is higher, has reached 6.4~7.8, and the loss under 10GHz is relatively low, has reached 1.4 × 10-3~2.2 × 10-3, dielectric is normal
Number absolute value temperature coefficient is relatively low, is -100 ± 10ppm/ DEG C, and the microwave circuit substrate of high-k is needed available for making.
But, the quality factor for the substrate that this method is prepared are poor, and highest only reaches 5600, and temperature frequency coefficient compared with
Greatly, thermal conductivity is poor.
The content of the invention
In view of this, it is an object of the invention to provide a kind of ceramic material and preparation method thereof, polytetrafluoroethylene (PTFE)-ceramics
Composite and preparation method thereof and substrate, polytetrafluoroethylene (PTFE)-ceramic composite that the present invention is provided have higher dielectric
Constant, relatively low loss, quality factor are higher, and with relatively low temperature frequency coefficient and higher thermal conductivity.
The invention provides a kind of ceramic material, with the formula shown in Formulas I：
xLi2TiO3-(1-x)ZnNb2O6Formulas I；
In Formulas I, 0.25≤x≤0.4.
The invention provides a kind of preparation method of ceramic material, including：
Zinc oxide, lithium carbonate, niobium pentaoxide and titanium dioxide are mixed, mixture is obtained；
The mixture is calcined, ceramic material is obtained；The ceramic material has the formula shown in Formulas I：
xLi2TiO3-(1-x)ZnNb2O6Formulas I；
In Formulas I, 0.25≤x≤0.4.
It is preferred that, the time of the calcining is 2 hours~6 hours.
It is preferred that, the temperature of the calcining is 1200 DEG C~1300 DEG C.
The invention provides a kind of ceramic material, with the formula shown in Formulas I.The ceramic material that the present invention is provided have compared with
High dielectric constant, it is relatively low be lost, relatively low frequency-temperature coefficient and higher thermal conductivity.Test result indicates that, the present invention
The dielectric constant of the ceramic material of offer is that the loss under 60~64,10GHz is 0.7 × 10-3~0.9 × 10-3, frequency temperature
Coefficient is -5ppm/ DEG C~20ppm/ DEG C, and thermal conductivity is 3.1W/mK~3.7W/mK.
The invention provides a kind of polytetrafluoroethylene (PTFE)-ceramic composite, prepared by ceramic powder and polytetrafluoroethylene (PTFE),
The ceramic powder has the formula shown in Formulas I：
xLi2TiO3-(1-x)ZnNb2O6Formulas I；
In Formulas I, 0.25≤x≤0.4.
It is preferred that, the mass ratio of the ceramic powder and polytetrafluoroethylene (PTFE) is (7~8):(3.3~5.3).
The invention provides a kind of preparation method of polytetrafluoroethylene (PTFE)-ceramic composite, including：
In the presence of silane coupler, ceramic powder, polytetrafluoroethylene (PTFE) and demulsifier are mixed, polytetrafluoroethyl-ne is obtained
Alkene-ceramic composite, the demulsifier includes alcohol compound or ether compound；The ceramic powder has shown in Formulas I
Formula：
xLi2TiO3-(1-x)ZnNb2O6Formulas I；
In Formulas I, 0.25≤x≤0.4.
It is preferred that, the silane coupler, ceramic powder, the mass ratio of polytetrafluoroethylene (PTFE) and demulsifier are 0.1:(7~8):
(3.3~5.3):(1.7~3.3).
It is preferred that, the demulsifier is ethanol, ether, polyoxyethylene octadecanol ether or polyoxypropylene octadecyl alcolol ether.
The invention provides a kind of polytetrafluoroethylene (PTFE)-ceramic composite, prepared by ceramic powder and polytetrafluoroethylene (PTFE),
The ceramic powder has the formula shown in Formulas I.Polytetrafluoroethylene (PTFE)-ceramic composite that the present invention is provided, using with Formulas I institute
Show that the ceramic powder of formula is prepared, because the ceramic powder with formula shown in Formulas I has higher dielectric constant, relatively low damage
Consumption, relatively low frequency-temperature coefficient and higher thermal conductivity, make polytetrafluoroethylene (PTFE)-ceramic composite that the present invention is provided also have
There are higher dielectric constant, relatively low loss, quality factor are higher, and with relatively low frequency-temperature coefficient and higher heat
Conductance.Test result indicates that, the dielectric constant for polytetrafluoroethylene (PTFE)-ceramic composite that the present invention is provided is 20~30,10GHz
Under loss be 1 × 10-3~1.5 × 10-3, quality factor reach 30000, and frequency-temperature coefficient is -80 ± 25ppm/ DEG C, heat
Conductance is 1.2W/mK~1.7W/mK.
The invention provides a kind of preparation method of polytetrafluoroethylene (PTFE)-ceramic composite, including：In silane coupler
Under effect, ceramic powder, polytetrafluoroethylene (PTFE) and demulsifier are mixed, polytetrafluoroethylene (PTFE)-ceramic composite is obtained, it is described broken
Emulsion includes alcohol compound or ether compound；The ceramic powder has the formula shown in Formulas I.The method system that the present invention is provided
Standby obtained polytetrafluoroethylene (PTFE)-ceramic composite has higher dielectric constant, relatively low loss, and quality factor are higher, and
And with relatively low frequency-temperature coefficient and higher thermal conductivity.In addition, polytetrafluoroethylene (PTFE)-Ceramic Composite material that the present invention is provided
The preparation method technique of material is simple, cost is relatively low, available for mass producing.
The invention provides a kind of substrate, prepared as the polytetrafluoroethylene (PTFE) described in above-mentioned technical proposal-ceramic composite
Obtain；Or prepared by polytetrafluoroethylene (PTFE)-ceramic composite that above-mentioned technical proposal methods described is prepared.
Because using polytetrafluoroethylene (PTFE)-ceramic composite described in above-mentioned technical proposal, the substrate that the present invention is provided has
There are higher dielectric constant, relatively low loss, quality factor are higher, and with relatively low frequency-temperature coefficient and higher heat
Conductance.
Embodiment
The technical scheme in the embodiment of the present invention is clearly and completely described below, it is clear that described embodiment
Only a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, the common skill in this area
The every other embodiment that art personnel are obtained under the premise of creative work is not made, belongs to the model that the present invention is protected
Enclose.
The invention provides a kind of ceramic material, with the formula shown in Formulas I：
xLi2TiO3-(1-x)ZnNb2O6Formulas I；
In Formulas I, 0.25≤x≤0.4.
The ceramic material that the present invention is provided have higher dielectric constant, it is relatively low be lost, relatively low frequency-temperature coefficient
Higher thermal conductivity.
In the present invention, the ceramic material has in the formula shown in Formulas I, Formulas I, 0.25≤x≤0.4；It is preferred that,
0.3≤x≤0.35。
The invention provides a kind of preparation method of ceramic material, including：
Zinc oxide, lithium carbonate, niobium pentaoxide and titanium dioxide are mixed, mixture is obtained；
The mixture is calcined, ceramic material is obtained；The ceramic material has the formula shown in Formulas I：
xLi2TiO3-(1-x)ZnNb2O6Formulas I；
In Formulas I, 0.25≤x≤0.4.
The ceramic material that the method that the present invention is provided is prepared have higher dielectric constant, it is relatively low be lost, it is relatively low
Frequency-temperature coefficient and higher thermal conductivity.
The present invention is mixed zinc oxide, lithium carbonate, niobium pentaoxide and titanium dioxide, obtains mixture.In this hair
In bright, the temperature of the mixing is preferably 20 DEG C~30 DEG C, more preferably 24 DEG C~28 DEG C.In the present invention, the mixing
Time is preferably 8 hours~12 hours, more preferably 9 hours~10 hours.
Zinc oxide, lithium carbonate, niobium pentaoxide and titanium dioxide are preferably ground mixing by the present invention.In the present invention
In, the method for the grinding is preferably ball milling.In the present invention, described in the temperature and time and above-mentioned technical proposal of the grinding
The temperature and time of mixing is consistent, will not be repeated here.
In the present invention, the consumption of the zinc oxide, lithium carbonate, niobium pentaoxide and titanium dioxide is according in target formula
Li, Ti, Zn and Nb mol ratio carry out dispensing, and the target formula is：xLi2TiO3-(1-x)ZnNb2O6, 0.25≤x≤
0.4。
Obtain after mixture, the present invention is calcined the mixture, obtains ceramic material；The ceramic material has
Formula shown in Formulas I.In the present invention, the temperature of the calcining is preferably 1200 DEG C~1300 DEG C, more preferably 1220 DEG C~
1280 DEG C, most preferably 1240 DEG C~1260 DEG C.In the present invention, the time of the calcining is preferably 2 hours~6 hours, more
Preferably 3 hours~5 hours, most preferably 4 hours.
Before the mixture is calcined, preferably processing is dried in the mixture by the present invention.In this hair
In bright, the method for mixture described in drying process is preferably drying.In the present invention, the time of mixture described in drying process is excellent
Elect as 6 hours~10 hours, more preferably 7 hours~8 hours.In the present invention, the temperature of mixture described in drying process is excellent
Elect 100 DEG C~120 DEG C, more preferably 110 DEG C as.
The invention provides a kind of polytetrafluoroethylene (PTFE)-ceramic composite, prepared by ceramic powder and polytetrafluoroethylene (PTFE),
The ceramic powder has the formula shown in Formulas I：
xLi2TiO3-(1-x)ZnNb2O6Formulas I；
In Formulas I, 0.25≤x≤0.4.
Polytetrafluoroethylene (PTFE)-ceramic composite that the present invention is provided, is prepared into using the ceramic powder with formula shown in Formulas I
Arrive, due to the ceramic powder with formula shown in Formulas I have higher dielectric constant, it is relatively low be lost, relatively low frequency temperature system
Number and higher thermal conductivity, make polytetrafluoroethylene (PTFE)-ceramic composite for providing of the present invention also have higher dielectric constant, compared with
Low loss, quality factor are higher, and with relatively low frequency-temperature coefficient and higher thermal conductivity.
In the present invention, the granularity of the ceramic powder is preferably 2 microns~40 microns, more preferably 3 microns~30 microns,
Most preferably 5 microns~20 microns.In the present invention, the ceramic powder preferably includes the first pottery that granularity is 2 microns~5 microns
Porcelain powder and the second ceramic powder that granularity is 25 microns~40 microns.In the present invention, the granularity of first ceramic powder is preferably 3
Micron~4 microns.In the present invention, the granularity of second ceramic powder is preferably 30 microns~35 microns.In the present invention, institute
The mass ratio for stating the first ceramic powder and the second ceramic powder is preferably (2~4):1, more preferably 3：1.
It is of the invention preferably to prepare polytetrafluoroethylene (PTFE)-Ceramic Composite material using first ceramic powder and the second ceramic powder simultaneously
Material, prepares polytetrafluoroethylene (PTFE)-ceramic composite using the ceramic powder of two kinds of different-grain diameters, can further reduce system of the present invention
The loss of standby obtained polytetrafluoroethylene (PTFE)-ceramic composite, and further improve the polytetrafluoroethyl-ne that the present invention is prepared
The thermal conductivity of alkene-ceramic composite；But also polytetrafluoroethylene (PTFE)-ceramic composite that the present invention is prepared can be increased
Consistency.
Obtain after ceramic powder, the ceramic powder is preferably carried out first and ground by the present invention, obtains granularity micro- for 2 microns~5
First ceramic powder of rice.In the present invention, the method for first grinding is preferably ball milling.In the present invention, described first grind
The time of mill is preferably 10~14 hours, more preferably 12 hours.
After the completion of first grinding, the present invention preferably dries the first obtained grinding product, sieving, and obtaining granularity is
First ceramic powder of 2 microns~5 particulates.In the present invention, the temperature for drying first grinding product is preferably 100 DEG C~
120 DEG C, more preferably 110 DEG C.
Obtain after ceramic powder, the ceramic powder is preferably carried out second and ground by the present invention, and it is 25 microns~40 to obtain granularity
Second ceramic powder of micron.In the present invention, the method for second grinding is preferably ball milling.In the present invention, described second
The time of grinding is preferably 2~4 hours, more preferably 3 hours.
After the completion of second grinding, the present invention preferably dries the second obtained grinding product, sieving, and obtaining granularity is
Second ceramic powder of 25 microns~40 particulates.In the present invention, the temperature for drying second grinding product is preferably 100 DEG C~
120 DEG C, more preferably 110 DEG C.
In the present invention, the polytetrafluoroethylene (PTFE) preferably includes polytetrafluoroethylene powder and polytetrafluoroethyldispersion dispersion.At this
In invention, the granularity of the polytetrafluoroethylene powder is preferably 0.3 μm~0.9 μm, more preferably 0.4 μm~0.6 μm.The present invention is right
The source of the polytetrafluoroethylene powder can be bought by market and be obtained without special limitation.In the present invention, the polytetrafluoroethyl-ne
The mass concentration of alkene dispersion liquid is preferably 25%~35%, and more preferably 30%.The present invention is to the polytetrafluoroethyldispersion dispersion
Source without special limitation, can by market purchase acquisition.In an embodiment of the present invention, the polytetrafluoroethyldispersion dispersion
The BM3701 type emulsions that can be provided for Minnesota Mining and Manufacturing Company.In the present invention, the polytetrafluoroethylene powder and polytetrafluoroethylene (PTFE) point
The mass ratio of dispersion liquid is preferably (1.5~2):(1.7~3.3), more preferably (1.6~1.8):(2~3).
It is of the invention that polytetrafluoroethylene (PTFE)-ceramics are preferably prepared using polytetrafluoroethylene powder and polytetrafluoroethyldispersion dispersion simultaneously
Composite, while preparing polytetrafluoroethylene (PTFE)-ceramic composite using polytetrafluoroethylene powder and polytetrafluoroethyldispersion dispersion, no
The consistency of the polytetrafluoroethylene (PTFE)-ceramic composite only prepared is higher, but also can save cost.
In the present invention, the mass ratio of the ceramic powder and polytetrafluoroethylene (PTFE) is preferably (7~8):(3.3~5.3), it is more excellent
Elect as (7~8):(4~5).
The invention provides a kind of preparation method of polytetrafluoroethylene (PTFE)-ceramic composite, including：
In the presence of silane coupler, ceramic powder, polytetrafluoroethylene (PTFE) and demulsifier are mixed, polytetrafluoroethyl-ne is obtained
Alkene-ceramic composite, the demulsifier includes alcohol compound or ether compound；The ceramic powder has shown in Formulas I
Formula：
xLi2TiO3-(1-x)ZnNb2O6Formulas I；
In Formulas I, 0.25≤x≤0.4.
Polytetrafluoroethylene (PTFE)-ceramic composite that the method that the present invention is provided is prepared have higher dielectric constant,
Relatively low loss, quality factor are higher, and with relatively low frequency-temperature coefficient and higher thermal conductivity.In addition, of the invention
The preparation method technique of polytetrafluoroethylene (PTFE)-ceramic composite of offer is simple, cost is relatively low, available for mass producing.
Ceramic powder, polytetrafluoroethylene (PTFE) and demulsifier are mixed, gathered in the presence of silane coupler by the present invention
Tetrafluoroethene-ceramic composite.In the present invention, the temperature of the mixing is preferably 20 DEG C~30 DEG C, more preferably 24 DEG C
~28 DEG C.In the present invention, the time of the mixing is preferably 60 minutes~120 minutes, more preferably 80 minutes~100 points
Clock.The present invention carries out the mixing preferably under conditions of stirring.In the present invention, the method for the stirring is preferably that ultrasound is stirred
Mix.In the present invention, the power of the ultrasonic agitation is preferably 350W~500W, more preferably 400W~450W.
The present invention does not have special limitation to the species of the silane coupler and source, ripe using those skilled in the art
The silane coupler known, can be bought by market and obtained.In the present invention, the demulsifier includes alcohol compound or ethers
Compound, preferably alcohol compound.In the present invention, the alcohol compound is preferably the alcohols that carbon number is 1~5
Compound, more preferably carbon number are 1~3 alcohol compound, most preferably ethanol, the most preferably absolute ethyl alcohol.At this
In invention, the ether compound is preferably ether, polyoxyethylene octadecanol ether or polyoxypropylene octadecyl alcolol ether.In the present invention
In, the species of the ceramic powder and polytetrafluoroethylene (PTFE) and source and the kind of ceramic powder and polytetrafluoroethylene (PTFE) described in above-mentioned technical proposal
Class is consistent with source, will not be repeated here.
In the present invention, the mass ratio of the silane coupler, ceramic powder, polytetrafluoroethylene (PTFE) and demulsifier is preferably 0.1:
(7~8):(3.3~5.3):(1.7~3.3), more preferably 0.1:(7~8):(4~5):(2~3).
First ceramic powder, the second ceramic powder, polytetrafluoroethylene powder and water are preferably carried out first and mixed by the present invention, obtain the
One mixture；
Silane coupler is added into first mixture and carries out the second mixing, the second mixture is obtained；
Polytetrafluoroethyldispersion dispersion is added into second mixture and carries out the 3rd mixing, the 3rd mixture is obtained；
Demulsifier is added into the 3rd mixture and carries out the 4th mixing, polytetrafluoroethylene (PTFE)-ceramic composite is obtained.
First ceramic powder, the second ceramic powder, polytetrafluoroethylene powder and water are preferably carried out first and mixed by the present invention, obtain the
One mixture.The present invention carries out first under conditions of preferably being stirred first and mixed.In the present invention, the side of first stirring
Method is preferably ultrasonic agitation.In the present invention, the temperature of first mixing is preferably 20 DEG C~30 DEG C, more preferably 25 DEG C.
In the present invention, the time of first mixing is preferably 20 minutes~40 minutes, more preferably 30 minutes.
In the present invention, first ceramic powder, the second ceramic powder, the species of polytetrafluoroethylene powder and source and above-mentioned skill
First ceramic powder described in art scheme, the second ceramic powder, polytetrafluoroethylene powder species it is consistent with source, will not be repeated here.
In the present invention, the mass ratio of the total quality of first ceramic powder and the second ceramic powder and polytetrafluoroethylene powder be preferably (7~
8):(1.5~2), the mass ratio of first ceramic powder and the second ceramic powder is preferably (2~4):1.In the present invention, it is described
Water in first mixture is preferably deionized water.The present invention does not have special limitation to the consumption of the water, meets above-mentioned skill
The practical operation condition of ultrasonic agitation described in art scheme.
Obtain after the first mixture, the present invention adds silane coupler progress second preferably into first mixture and mixed
Close, obtain the second mixture.The present invention carries out second under conditions of preferably being stirred second and mixed.In the present invention, described
The method of two stirrings is preferably ultrasonic agitation.In the present invention, the temperature of second mixing is preferably 20 DEG C~30 DEG C, more excellent
Elect 25 DEG C as.In the present invention, the time of second mixing is preferably 20 minutes~40 minutes, more preferably 30 minutes.
In the present invention, the species of the silane coupler and source and the kind of silane coupler described in above-mentioned technical proposal
Class is consistent with source, will not be repeated here.In the present invention, the silane coupler and polytetrafluoroethyl-ne described in above-mentioned technical proposal
The mass ratio of alkene powder is preferably 0.1:(1.5~2), more preferably 0.1:(1.6~1.8).
Obtain after the second mixture, the present invention adds polytetrafluoroethyldispersion dispersion preferably into second mixture and carried out
3rd mixing, obtains the 3rd mixture.The present invention carries out the 3rd under conditions of preferably being stirred the 3rd and mixed.In the present invention,
The method of 3rd stirring is preferably ultrasonic agitation.In the present invention, the temperature of the 3rd mixing is preferably 20 DEG C~30
DEG C, more preferably 25 DEG C.In the present invention, the time of the 3rd mixing is preferably 20 minutes~40 minutes, more preferably 30
Minute.
In the present invention, the species of the polytetrafluoroethyldispersion dispersion and source and polytetrafluoroethyl-ne described in above-mentioned technical proposal
The species of alkene dispersion liquid is consistent with source, will not be repeated here.In the present invention, polytetrafluoroethylene powder described in above-mentioned technical proposal
Mass ratio with polytetrafluoroethyldispersion dispersion is preferably (1.5~2):(1.7~3.3), more preferably (1.6~1.8):(2~
3)。
Obtain after the 3rd mixture, the present invention adds demulsifier preferably into the 3rd mixture and carries out the 4th mixing,
Obtain polytetrafluoroethylene (PTFE)-ceramic composite.The present invention carries out the 4th under conditions of preferably being stirred the 4th and mixed.In the present invention
In, the method for the 4th stirring is preferably ultrasonic agitation.In the present invention, the temperature of the 4th mixing be preferably 20 DEG C~
30 DEG C, more preferably 25 DEG C.In the present invention, the time of the 4th mixing is preferably 60~120 minutes, more preferably 80~
100 minutes.
In the present invention, the species of the demulsifier and source and the species of demulsifier and source described in above-mentioned technical proposal
Unanimously, it will not be repeated here.In the present invention, the mass ratio of the demulsifier and polytetrafluoroethylene powder described in above-mentioned technical proposal
Preferably (1.7~3.3):(1.5~2), more preferably (2~3):(1.6~1.8).
After the completion of the mixing, preferably processing is dried in obtained mixture by the present invention, obtains polytetrafluoroethylene (PTFE)-pottery
Porcelain composite.In the present invention, the temperature of mixture described in drying process is preferably 80 DEG C~100 DEG C, more preferably 90 DEG C.
In the present invention, the time of mixture described in drying process is preferably 3 hours~4 hours.
The invention provides a kind of substrate, prepared as the polytetrafluoroethylene (PTFE) described in above-mentioned technical proposal-ceramic composite
Obtain；Or prepared by polytetrafluoroethylene (PTFE)-ceramic composite that above-mentioned technical proposal methods described is prepared.
The substrate that the present invention is provided is prepared as polytetrafluoroethylene (PTFE)-ceramic composite described in above-mentioned technical proposal
, the polytetrafluoroethylene (PTFE)-ceramic composite has higher dielectric constant, relatively low loss, and quality factor are higher, and
With relatively low frequency-temperature coefficient and higher thermal conductivity；Make the substrate that provides of the present invention also have higher dielectric constant,
Relatively low loss, quality factor are higher, and with relatively low frequency-temperature coefficient and higher thermal conductivity.
In the present invention, the preparation method of the substrate is preferably：
Polytetrafluoroethylene (PTFE)-ceramic composite progress is hot-forming, obtain substrate；Polytetrafluoroethylene (PTFE)-the ceramics are multiple
Condensation material is polytetrafluoroethylene (PTFE)-ceramic composite described in above-mentioned technical proposal；Or as the method described in above-mentioned technical proposal
Polytetrafluoroethylene (PTFE)-the ceramic composite prepared.
The present invention preferably by polytetrafluoroethylene (PTFE)-ceramic composite upper and lower faces cover copper carry out it is hot-forming, obtain base
Plate.In the present invention, the hot-forming pressure is preferably 20MPa~40MPa, and more preferably 25MPa~35MPa is optimal
Elect 30MPa as.In the present invention, the hot-forming temperature is preferably 300 DEG C~400 DEG C, more preferably 340 DEG C~380
DEG C, most preferably 350 DEG C.In the present invention, the hot-forming insulation, dwell time are preferably 1 hour~3 hours, more
Preferably 2 hours.
The formula for the ceramic material that the present invention is provided is tested using Xray fluorescence spectrometer, test result is that the present invention is carried
The formula of the ceramic material of confession is xLi2TiO3-(1-x)ZnNb2O6, 0.25≤x≤0.4.
Dielectric constant, loss and the frequency temperature system for the ceramic material that the present invention is provided are measured using vector network analyzer
Number；Test result is, the dielectric constant of the ceramic material that the present invention is provided is that the loss under 60~64,10GHz is 0.7 × 10-3
~0.9 × 10-3, frequency-temperature coefficient is -5ppm/ DEG C~20ppm/ DEG C.
The thermal conductivity for the ceramic material that the present invention is provided is tested using laser conductometer；Test result is that the present invention is provided
Ceramic material thermal conductivity be 3.1W/mK~3.7W/mK.
The dielectric constant of the polytetrafluoroethylene (PTFE)-ceramic composite provided using the vector network analyzer measurement present invention,
Loss and frequency-temperature coefficient；Test result is that the dielectric constant for polytetrafluoroethylene (PTFE)-ceramic composite that the present invention is provided is
Loss under 20~30,10GHz is 1 × 10-3~1.5 × 10-3, frequency-temperature coefficient is -80 ± 25ppm/ DEG C
In the present invention, the computational methods of the quality factor of the polytetrafluoroethylene (PTFE)-ceramic composite are：
The quotient that dielectric constant divided by loss are obtained.
The quality factor for polytetrafluoroethylene (PTFE)-ceramic composite that the present invention is provided are calculated, result of calculation is that the present invention is carried
The quality factor of polytetrafluoroethylene (PTFE)-ceramic composite of confession can reach 30000.
The thermal conductivity for polytetrafluoroethylene (PTFE)-ceramic composite that the present invention is provided is tested using laser conductometer；Test knot
Fruit is that the thermal conductivity for polytetrafluoroethylene (PTFE)-ceramic composite that the present invention is provided is 1.2W/mK~1.7W/mK.
The invention provides a kind of ceramic material, with the formula shown in Formulas I.The ceramic material that the present invention is provided have compared with
High dielectric constant, it is relatively low be lost, relatively low frequency-temperature coefficient and higher thermal conductivity.
The invention provides a kind of polytetrafluoroethylene (PTFE)-ceramic composite, prepared by ceramic powder and polytetrafluoroethylene (PTFE),
The ceramic powder has the formula shown in Formulas I.Polytetrafluoroethylene (PTFE)-ceramic composite that the present invention is provided, using with Formulas I institute
Show that the ceramic powder of formula is prepared, because the ceramic powder with formula shown in Formulas I has higher dielectric constant, relatively low damage
Consumption, relatively low frequency-temperature coefficient and higher thermal conductivity, make polytetrafluoroethylene (PTFE)-ceramic composite that the present invention is provided also have
There are higher dielectric constant, relatively low loss, quality factor are higher, and with relatively low frequency-temperature coefficient and higher heat
Conductance.
The invention provides a kind of preparation method of polytetrafluoroethylene (PTFE)-ceramic composite, including：In silane coupler
Under effect, ceramic powder, polytetrafluoroethylene (PTFE) and demulsifier are mixed, polytetrafluoroethylene (PTFE)-ceramic composite is obtained, it is described broken
Emulsion includes alcohol compound or ether compound；The ceramic powder has the formula shown in Formulas I.The method system that the present invention is provided
Standby obtained polytetrafluoroethylene (PTFE)-ceramic composite has higher dielectric constant, relatively low loss, and quality factor are higher, and
And with relatively low frequency-temperature coefficient and higher thermal conductivity.In addition, polytetrafluoroethylene (PTFE)-Ceramic Composite material that the present invention is provided
The preparation method technique of material is simple, cost is relatively low, available for mass producing.
The invention provides a kind of substrate, prepared as the polytetrafluoroethylene (PTFE) described in above-mentioned technical proposal-ceramic composite
Obtain；Or prepared by polytetrafluoroethylene (PTFE)-ceramic composite that above-mentioned technical proposal methods described is prepared.The present invention
The substrate of offer has higher dielectric constant, relatively low loss, and quality factor are higher, and with relatively low frequency temperature system
Number and higher thermal conductivity.
Raw material used in following examples of the present invention is commercial goods.
Embodiment 1
By 243g zinc oxide, 67g lithium carbonate, 828g niobium pentaoxide and 80g titanium dioxide in 25 DEG C of progress
The ball milling mixing of 12 hours, obtains mixture；
The mixture is dried 6 hours at 100 DEG C, the mixture after drying is carried out 4 hours at 1280 DEG C
Calcining, obtains ceramic powder.
The ceramic powder that the embodiment of the present invention 1 is prepared is divided into two batches, and first ceramic powder is carried out to the ball of 3 hours
Mill, drying, sieving, obtain the ceramic powder that granularity is 30 microns, the temperature of the drying is 100 DEG C；
By the ball milling of second batch ceramic powder progress 12 hours, drying, sieving, the ceramic powder that granularity is 3 microns is obtained, it is described
The temperature of drying is 100 DEG C.
According to the method described in above-mentioned technical proposal, the formula for the ceramic powder that the test embodiment of the present invention 1 is prepared is surveyed
Test result is that the formula for the ceramic powder that the embodiment of the present invention 1 is prepared is 0.25Li2TiO3-0.75ZnNb2O6。
Embodiment 2
189g zinc oxide, 67g lithium carbonate, 643g niobium pentaoxide and 80g titanium dioxide are entered at 25 DEG C
The row ball milling mixing of 12 hours, obtains mixture；
The mixture is dried 6 hours at 120 DEG C, the mixture after drying is carried out 4 hours at 1300 DEG C
Calcining, obtains ceramic powder.
The ceramic powder that the embodiment of the present invention 2 is prepared is divided into two batches, and first ceramic powder is carried out to the ball of 3 hours
Mill, drying, sieving, obtain the ceramic powder that granularity is 30 microns, the temperature of the drying is 120 DEG C；
By the ball milling of second batch ceramic powder progress 12 hours, drying, sieving, the ceramic powder that granularity is 3 microns is obtained, it is described
The temperature of drying is 120 DEG C.
According to the method described in above-mentioned technical proposal, the formula for the ceramic powder that the test embodiment of the present invention 2 is prepared is surveyed
Test result is that the formula for the ceramic powder that the embodiment of the present invention 2 is prepared is 0.3Li2TiO3-0.7ZnNb2O6。
Embodiment 3
162g zinc oxide, 67g lithium carbonate, 552g niobium pentaoxide and 80g titanium dioxide are entered at 25 DEG C
The row ball milling mixing of 12 hours, obtains mixture；
The mixture is dried 10 hours at 110 DEG C, the mixture after drying is carried out 4 hours at 1250 DEG C
Calcining, obtains ceramic powder.
The ceramic powder that the embodiment of the present invention 3 is prepared is divided into two batches, and first ceramic powder is carried out to the ball of 3 hours
Mill, drying, sieving, obtain the ceramic powder that granularity is 30 microns, the temperature of the drying is 110 DEG C；
By the ball milling of second batch ceramic powder progress 12 hours, drying, sieving, the ceramic powder that granularity is 3 microns is obtained, it is described
The temperature of drying is 110 DEG C.
According to the method described in above-mentioned technical proposal, the formula for the ceramic powder that the test embodiment of the present invention 3 is prepared is surveyed
Test result is that the formula for the ceramic powder that the embodiment of the present invention 3 is prepared is 0.33Li2TiO3-0.67ZnNb2O6。
Embodiment 4
132g zinc oxide, 67g lithium carbonate, 450g niobium pentaoxide and 80g titanium dioxide are entered at 25 DEG C
The row ball milling mixing of 12 hours, obtains mixture；
The mixture is dried 8 hours at 100 DEG C, the mixture after drying is carried out 4 hours at 1240 DEG C
Calcining, obtains ceramic powder.
The ceramic powder that the embodiment of the present invention 4 is prepared is divided into two batches, and first ceramic powder is carried out to the ball of 3 hours
Mill, drying, sieving, obtain the ceramic powder that granularity is 30 microns, the temperature of the drying is 100 DEG C；
By the ball milling of second batch ceramic powder progress 12 hours, drying, sieving, the ceramic powder that granularity is 3 microns is obtained, it is described
The temperature of drying is 100 DEG C.
According to the method described in above-mentioned technical proposal, the formula for the ceramic powder that the test embodiment of the present invention 4 is prepared is surveyed
Test result is that the formula for the ceramic powder that the embodiment of the present invention 4 is prepared is 0.38Li2TiO3-0.62ZnNb2O6。
Embodiment 5
121g zinc oxide, 67g lithium carbonate, 414g niobium pentaoxide and 80g titanium dioxide are entered at 25 DEG C
The row ball milling mixing of 12 hours, obtains mixture；
The mixture is dried 8 hours at 120 DEG C, the mixture after drying is carried out 4 hours at 1200 DEG C
Calcining, obtains ceramic powder.
The ceramic powder that the embodiment of the present invention 5 is prepared is divided into two batches, and first ceramic powder is carried out to the ball of 3 hours
Mill, drying, sieving, obtain the ceramic powder that granularity is 30 microns, the temperature of the drying is 120 DEG C；
By the ball milling of second batch ceramic powder progress 12 hours, drying, sieving, the ceramic powder that granularity is 3 microns is obtained, it is described
The temperature of drying is 120 DEG C.
According to the method described in above-mentioned technical proposal, the formula for the ceramic powder that the test embodiment of the present invention 5 is prepared is surveyed
Test result is that the formula for the ceramic powder that the embodiment of the present invention 5 is prepared is 0.4Li2TiO3-0.6ZnNb2O6。
The dielectric constant for the ceramic material that the present invention is provided is that the loss under 60~64,10GHz is 0.7 × 10-3~0.9 ×
10-3, frequency-temperature coefficient is -5ppm/ DEG C~20ppm/ DEG C, and thermal conductivity is 3.1W/mK~3.7W/mK.
Embodiment 6
Ceramic powder of the granularity that 200g embodiments 1 are prepared for 30 microns, the granularity for preparing of 600g embodiments 1
Ceramic powder for 3 particulates and the polytetrafluoroethylene powder mixing that 150g granularities are 0.4 μm, deionization is added into obtained mixture
Water, ultrasonic agitation 30min carries out the first mixing at 25 DEG C, obtains the first mixture；
10g KH550 silane couplers are added into first mixture, ultrasonic agitation 30min is carried out at 25 DEG C
Second mixing, obtains the second mixture；
The BM3701 type emulsions that 170g Minnesota Mining and Manufacturing Company provides are added into second mixture, it is ultrasonic at 25 DEG C
Stir 30min and carry out the 3rd mixing, obtain the 3rd mixture；
170g absolute ethyl alcohol and stirring is added into the 3rd mixture, the 4th mixing of 70 minutes is carried out, obtains the
Four mix products；
4th mix products are dried 3 hours at 80 DEG C, polytetrafluoroethylene (PTFE)-ceramic composite is obtained.
The polytetrafluoroethylene (PTFE) that the embodiment of the present invention 6 is prepared-ceramic composite upper and lower surface covers copper, carries out hot pressing
Shaping, obtains substrate, and the hot-forming pressure is 30MPa, and the hot-forming temperature is 350 DEG C, described to be hot pressed into
The insulation of type, dwell time are 2 hours.
According to the method described in above-mentioned technical proposal, polytetrafluoroethylene (PTFE)-ceramics that the test embodiment of the present invention 6 is prepared
Dielectric constant, the loss under 10GHz, quality factor, frequency-temperature coefficient and the thermal conductivity of composite.Test result is, this
The dielectric constant for polytetrafluoroethylene (PTFE)-ceramic composite that inventive embodiments 6 are prepared be loss under 30,10GHz be 1 ×
10-3, quality factor are 30000, and frequency-temperature coefficient is -55ppm/ DEG C, and thermal conductivity is 1.7W/mK.
Embodiment 7
Ceramic powder of the granularity that 180g embodiments 2 are prepared for 30 microns, the granularity for preparing of 540g embodiments 2
Ceramic powder for 3 particulates and the polytetrafluoroethylene powder mixing that 200g granularities are 0.8 μm, deionization is added into obtained mixture
Water, ultrasonic agitation 30min carries out the first mixing at 25 DEG C, obtains the first mixture；
10g KH550 silane couplers are added into first mixture, ultrasonic agitation 30min is carried out at 25 DEG C
Second mixing, obtains the second mixture；
The BM3701 type emulsions that 230g Minnesota Mining and Manufacturing Company provides are added into second mixture, it is ultrasonic at 25 DEG C
Stir 30min and carry out the 3rd mixing, obtain the 3rd mixture；
230g absolute ethyl alcohol and stirring is added into the 3rd mixture, the 4th mixing of 110 minutes is carried out, obtains the
Four mix products；
4th mix products are dried 4 hours at 100 DEG C, polytetrafluoroethylene (PTFE)-ceramic composite is obtained.
The polytetrafluoroethylene (PTFE) that the embodiment of the present invention 7 is prepared-ceramic composite upper and lower surface covers copper, carries out hot pressing
Shaping, obtains substrate, and the hot-forming pressure is 30MPa, and the hot-forming temperature is 350 DEG C, described to be hot pressed into
The insulation of type, dwell time are 2 hours.
According to the method described in above-mentioned technical proposal, polytetrafluoroethylene (PTFE)-ceramics that the test embodiment of the present invention 7 is prepared
Dielectric constant, the loss under 10GHz, quality factor, frequency-temperature coefficient and the thermal conductivity of composite.Test result is, this
The dielectric constant for polytetrafluoroethylene (PTFE)-ceramic composite that inventive embodiments 7 are prepared is that the loss under 29,10GHz is 1.3
×10-3, quality factor are 22307, and frequency-temperature coefficient is -65ppm/ DEG C, and thermal conductivity is 1.3W/mK.
Embodiment 8
Ceramic powder of the granularity that 175g embodiments 3 are prepared for 30 microns, the granularity for preparing of 525g embodiments 3
Ceramic powder for 3 particulates and the polytetrafluoroethylene powder mixing that 200g granularities are 0.7 μm, deionization is added into obtained mixture
Water, ultrasonic agitation 30min carries out the first mixing at 25 DEG C, obtains the first mixture；
10g KH550 silane couplers are added into first mixture, ultrasonic agitation 30min is carried out at 25 DEG C
Second mixing, obtains the second mixture；
The BM3701 type emulsions that 330g Minnesota Mining and Manufacturing Company provides are added into second mixture, it is ultrasonic at 25 DEG C
Stir 30min and carry out the 3rd mixing, obtain the 3rd mixture；
330g absolute ethyl alcohol and stirring is added into the 3rd mixture, the 4th mixing of 80 minutes is carried out, obtains the
Four mix products；
4th mix products are dried 3.5 hours at 90 DEG C, polytetrafluoroethylene (PTFE)-ceramic composite is obtained.
The polytetrafluoroethylene (PTFE) that the embodiment of the present invention 8 is prepared-ceramic composite upper and lower surface covers copper, carries out hot pressing
Shaping, obtains substrate, and the hot-forming pressure is 30MPa, and the hot-forming temperature is 350 DEG C, described to be hot pressed into
The insulation of type, dwell time are 2 hours.
According to the method described in above-mentioned technical proposal, polytetrafluoroethylene (PTFE)-ceramics that the test embodiment of the present invention 8 is prepared
Dielectric constant, the loss under 10GHz, quality factor, frequency-temperature coefficient and the thermal conductivity of composite.Test result is, this
The dielectric constant for polytetrafluoroethylene (PTFE)-ceramic composite that inventive embodiments 8 are prepared is that the loss under 25,10GHz is 1.3
×10-3, quality factor are 19230, and frequency-temperature coefficient is -90ppm/ DEG C, and thermal conductivity is 1W/mK.
Embodiment 9
The granularity that 187.5g embodiments 4 are prepared for 30 microns ceramic powder, 562.5g embodiments 4 prepare
The polytetrafluoroethylene powder mixing that granularity is the ceramic powder of 3 particulates and 180g granularities are 0.5 μm, adds into obtained mixture and goes
Ionized water, ultrasonic agitation 30min carries out the first mixing at 25 DEG C, obtains the first mixture；
10g KH550 silane couplers are added into first mixture, ultrasonic agitation 30min is carried out at 25 DEG C
Second mixing, obtains the second mixture；
The BM3701 type emulsions that 230g Minnesota Mining and Manufacturing Company provides are added into second mixture, it is ultrasonic at 25 DEG C
Stir 30min and carry out the 3rd mixing, obtain the 3rd mixture；
230g absolute ethyl alcohol and stirring is added into the 3rd mixture, the 4th mixing of 90 minutes is carried out, obtains the
Four mix products；
4th mix products are dried 4 hours at 85 DEG C, polytetrafluoroethylene (PTFE)-ceramic composite is obtained.
The polytetrafluoroethylene (PTFE) that the embodiment of the present invention 9 is prepared-ceramic composite upper and lower surface covers copper, carries out hot pressing
Shaping, obtains substrate, and the hot-forming pressure is 30MPa, and the hot-forming temperature is 350 DEG C, described to be hot pressed into
The insulation of type, dwell time are 2 hours.
According to the method described in above-mentioned technical proposal, polytetrafluoroethylene (PTFE)-ceramics that the test embodiment of the present invention 9 is prepared
Dielectric constant, the loss under 10GHz, quality factor, frequency-temperature coefficient and the thermal conductivity of composite.Test result is, this
The dielectric constant for polytetrafluoroethylene (PTFE)-ceramic composite that inventive embodiments 9 are prepared is that the loss under 23,10GHz is 1.4
×10-3, quality factor are 16428, and frequency-temperature coefficient is -95ppm/ DEG C, and thermal conductivity is 1.4W/mK.
Embodiment 10
The granularity that 197.5g embodiments 5 are prepared for 30 microns ceramic powder, 592.5g embodiments 5 prepare
The polytetrafluoroethylene powder mixing that granularity is the ceramic powder of 3 particulates and 150g granularities are 0.4 μm, adds into obtained mixture and goes
Ionized water, ultrasonic agitation 30min carries out the first mixing at 25 DEG C, obtains the first mixture；
10g KH550 silane couplers are added into first mixture, ultrasonic agitation 30min is carried out at 25 DEG C
Second mixing, obtains the second mixture；
The BM3701 type emulsions that 2g Minnesota Mining and Manufacturing Company provides are added into second mixture, ultrasound is stirred at 25 DEG C
Mix 30min and carry out the 3rd mixing, obtain the 3rd mixture；
2g absolute ethyl alcohol and stirring is added into the 3rd mixture, the 4th mixing of 90 minutes is carried out, obtains the 4th
Mix products；
4th mix products are dried 3 hours at 95 DEG C, polytetrafluoroethylene (PTFE)-ceramic composite is obtained.
The polytetrafluoroethylene (PTFE) that the embodiment of the present invention 10 is prepared-ceramic composite upper and lower surface covers copper, carries out heat
It is molded, substrate is obtained, the hot-forming pressure is 30MPa, and the hot-forming temperature is 350 DEG C, the hot pressing
The insulation of shaping, dwell time are 2 hours.
According to the method described in above-mentioned technical proposal, polytetrafluoroethylene (PTFE)-pottery that the test embodiment of the present invention 10 is prepared
Dielectric constant, the loss under 10GHz, quality factor, frequency-temperature coefficient and the thermal conductivity of porcelain composite.Test result is,
The dielectric constant for polytetrafluoroethylene (PTFE)-ceramic composite that the embodiment of the present invention 10 is prepared is that the loss under 28,10GHz is
1.2×10-3, quality factor are 23333, and frequency-temperature coefficient is -105ppm/ DEG C, and thermal conductivity is 1.6W/mK.
As seen from the above embodiment, the invention provides a kind of ceramic material, with the formula shown in Formulas I.The present invention is carried
The ceramic material of confession have higher dielectric constant, it is relatively low be lost, relatively low frequency-temperature coefficient and higher thermal conductivity.
The invention provides a kind of polytetrafluoroethylene (PTFE)-ceramic composite, prepared by ceramic powder and polytetrafluoroethylene (PTFE),
The ceramic powder has the formula shown in Formulas I.Polytetrafluoroethylene (PTFE)-ceramic composite that the present invention is provided, using with Formulas I institute
Show that the ceramic powder of formula is prepared, because the ceramic powder with formula shown in Formulas I has higher dielectric constant, relatively low damage
Consumption, relatively low frequency-temperature coefficient and higher thermal conductivity, make polytetrafluoroethylene (PTFE)-ceramic composite that the present invention is provided also have
There are higher dielectric constant, relatively low loss, quality factor are higher, and with relatively low frequency-temperature coefficient and higher heat
Conductance.
The invention provides a kind of preparation method of polytetrafluoroethylene (PTFE)-ceramic composite, including：In silane coupler
Under effect, ceramic powder, polytetrafluoroethylene (PTFE) and demulsifier are mixed, polytetrafluoroethylene (PTFE)-ceramic composite is obtained, it is described broken
Emulsion includes alcohol compound or ether compound；The ceramic powder has the formula shown in Formulas I.The method system that the present invention is provided
Standby obtained polytetrafluoroethylene (PTFE)-ceramic composite has higher dielectric constant, relatively low loss, and quality factor are preferable, and
And with relatively low frequency-temperature coefficient and higher thermal conductivity.In addition, polytetrafluoroethylene (PTFE)-Ceramic Composite material that the present invention is provided
The preparation method technique of material is simple, cost is relatively low, available for mass producing.
The invention provides a kind of substrate, prepared as the polytetrafluoroethylene (PTFE) described in above-mentioned technical proposal-ceramic composite
Obtain；Or prepared by polytetrafluoroethylene (PTFE)-ceramic composite that above-mentioned technical proposal methods described is prepared.The present invention
The substrate of offer has higher dielectric constant, relatively low loss, and quality factor are higher, and with relatively low frequency temperature system
Number and higher thermal conductivity.
Claims (9)
1. a kind of polytetrafluoroethylene (PTFE)-ceramic composite, is prepared by ceramic powder and polytetrafluoroethylene (PTFE), the ceramic powder has
Formula shown in Formulas I：
xLi2TiO3-(1-x)ZnNb2O6Formulas I；
In Formulas I, 0.25≤x≤0.4；
The ceramic powder includes that granularity is 2 microns~5 microns of the first ceramic powder and granularity is 25 microns~40 microns second
Ceramic powder.
2. polytetrafluoroethylene (PTFE)-ceramic composite according to claim 1, it is characterised in that the preparation of the ceramic powder
Method, including：
Zinc oxide, lithium carbonate, niobium pentaoxide and titanium dioxide are mixed, mixture is obtained；
The mixture is calcined, ceramic powder is obtained；The ceramic powder has the formula shown in Formulas I：
xLi2TiO3-(1-x)ZnNb2O6Formulas I；
In Formulas I, 0.25≤x≤0.4.
3. polytetrafluoroethylene (PTFE)-ceramic composite according to claim 2, it is characterised in that the time of the calcining is 2
Hour~6 hours.
4. polytetrafluoroethylene (PTFE)-ceramic composite according to claim 2, it is characterised in that the temperature of the calcining is
1200 DEG C~1300 DEG C.
5. polytetrafluoroethylene (PTFE)-ceramic composite according to claim 1, it is characterised in that the ceramic powder and poly- four
The mass ratio of PVF is (7~8):(3.3~5.3).
6. a kind of preparation method of polytetrafluoroethylene (PTFE)-ceramic composite described in claim 1, including：
In the presence of silane coupler, ceramic powder, polytetrafluoroethylene (PTFE) and demulsifier are mixed, obtain polytetrafluoroethylene (PTFE)-
Ceramic composite, the demulsifier includes alcohol compound or ether compound；The ceramic powder has logical shown in Formulas I
Formula：
xLi2TiO3-(1-x)ZnNb2O6Formulas I；
In Formulas I, 0.25≤x≤0.4；
The ceramic powder includes that granularity is 2 microns~5 microns of the first ceramic powder and granularity is 25 microns~40 microns second
Ceramic powder.
7. method according to claim 6, it is characterised in that the silane coupler, ceramic powder, polytetrafluoroethylene (PTFE) and broken
The mass ratio of emulsion is 0.1:(7~8):(3.3~5.3):(1.7~3.3).
8. method according to claim 6, it is characterised in that the demulsifier is ethanol, ether, polyoxyethylene octadecanol
Ether or polyoxypropylene octadecyl alcolol ether.
9. a kind of substrate, is prepared as polytetrafluoroethylene (PTFE)-ceramic composite described in any one in Claims 1 to 5；
Or polytetrafluoroethylene (PTFE)-ceramic composite that any one methods described is prepared in claim 6~8 is prepared.
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