CN103289160A - Metamaterial substrate and preparation method thereof, and metamaterial antenna - Google Patents
Metamaterial substrate and preparation method thereof, and metamaterial antenna Download PDFInfo
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- CN103289160A CN103289160A CN2012101833278A CN201210183327A CN103289160A CN 103289160 A CN103289160 A CN 103289160A CN 2012101833278 A CN2012101833278 A CN 2012101833278A CN 201210183327 A CN201210183327 A CN 201210183327A CN 103289160 A CN103289160 A CN 103289160A
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Abstract
The invention discloses a metamaterial substrate and a preparation method thereof, and a metamaterial antenna. The preparation materials of the metamaterial substrate include thermoplastic resin and a ceramic material nanowire. The invention also provides the preparation method of the metamaterial substrate. The method comprises the following steps of: completely mixing the ceramic material nanowire and a thermoplastic resin solution to obtain mixed liquid; and adding a curing agent into the mixed liquid, stirring uniformly, pouring the mixture in a die, and hot-pressing to obtain the substrate. By the method, the ceramic material nanowire serves as a filler of polystyrene, and preferably, the ceramic material nanowire is an aluminum nitride nanowire, so the heat-dissipating property and the mechanical property of the substrate material can be enhanced by utilizing the advantages of aluminum nitride, such as high thermal conductivity, low expansion coefficient and the like, and preparation of the metamateiral substrate with low loss and high strength is realized.
Description
Technical field
The present invention relates to super material field, particularly relate to a kind of super material substrate and preparation method thereof and super material antenna.
Background technology
The direction of the slimming of electronic product forward, high performance and multifunction develops.For this reason, baseplate material not only should have lower specific inductivity and dielectric loss, also should have excellent thermal characteristics, electrical property and mechanical property.Because polymkeric substance has advantages such as high resistivity, low-k and easy processing, they are often used as packaged material or baseplate material, but their thermal characteristicss are relatively poor, are not suitable for being applied to high integration and the high power circuit of high heat.
Traditional super material substrate adopts resol and Resins, epoxy more, and using maximum at present is the epoxy resin board FR-4 that glass fibre strengthens, and this material has in the low-frequency electronic product preferably and uses owing to have low cost of manufacture and the high advantage of cost performance.But in high frequency circuit, because its dielectric properties and resistance to elevated temperatures are relatively poor, FR-4 is not suitable for being applied in the high frequency circuit.Be difficult to satisfy super material to substrate in the requirement aspect the thermal characteristics.
Summary of the invention
The technical problem that the present invention mainly solves provides a kind of super material substrate and preparation method thereof and super material antenna, can strengthen heat dispersion and the mechanical property of baseplate material, has realized the preparation of the super material substrate of low loss and high strength.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: a kind of super material substrate is provided, and its preparation material comprises the nano wire of thermoplastic resin and stupalith.
Wherein, thermoplastic resin is polyethylene, polystyrene, polypropylene or polyvinyl chloride.
Wherein, the stupalith nano wire is aluminum nitride nanowire, alumina nanowires or beta-silicon nitride nanowire.
Wherein, the stupalith nano wire accounts for 1% ~ 50% of described thermoplastic resin weight.
For solving the problems of the technologies described above, another technical solution used in the present invention is: a kind of preparation method of super material substrate is provided, and the preparation method of this super material substrate may further comprise the steps: the stupalith nano wire is mixed the formation mixing liquid with the thermoplastic resin solution; In mixing liquid, add solidifying agent, be poured into the prepared substrate of hot pressing acquisition in the mould after stirring.
Wherein, hot pressing temperature is 75 ℃ ~ 220 ℃, and hot pressing pressure is 5 ~ 30MPa.
Wherein, also add in the mixing liquid promotor and/or catalyzer are arranged.
Wherein, the volume ratio of solidifying agent and mixing liquid is 1:1 ~ 4:1, and solidifying agent is N, accelerine vinylbenzene, dimethyl amine benzene or dimethylaniline.
Wherein, catalyzer is methylethyl ketone peroxide or methylethyl ketone peroxide liquid.
Wherein, promotor is naphthoic acid cobalt, cobalt naphthenate, cobalt iso-octoate or Diethyl Aniline.
For solving the problems of the technologies described above, another technical solution used in the present invention is: a kind of super material antenna is provided, and this super material antenna comprises substrate and the artificial microstructure that is attached on the described substrate.
Wherein, substrate is the substrate of preparation method's preparation of above-mentioned super material substrate.
The invention has the beneficial effects as follows: the situation that is different from prior art, it is the filler of polystyrene that the present invention adopts the stupalith nano wire, the preferred aluminum nitride nanowire of stupalith nano wire, because aluminum nitride nanowire has big specific surface area, and polystyrene has low-k and low-loss characteristics, itself and polystyrene are prepared into baseplate material, two-phase can be played and complex phase is toughness reinforcing, fine and close and improve intensity effect, can also utilize advantages such as aluminium nitride high heat conductance and low-expansion coefficient to strengthen heat dispersion and the mechanical property of baseplate material, realize low-loss, high strength, the preparation of the super material substrate of high thermal conductance.
Description of drawings
Fig. 1 is preparation method's the schema of the super material substrate of the embodiment of the invention;
Fig. 2 is preparation method's the schema of the stupalith nano wire of the embodiment of the invention.
Embodiment
Light, as electromagnetic a kind of, it is when passing glass, because the wavelength of light is much larger than the size of atom, therefore we can use the univers parameter of glass, and the details parameter of the atom of for example specific refractory power, rather than composition glass is described glass to the response of light.Accordingly, when research material was to other electromagnetic responses, any yardstick also can be represented with the univers parameter of material electromagnetic response much smaller than the structure of electromagnetic wavelength in the material, for example describes with DIELECTRIC CONSTANT and magnetic permeability μ.The structure by every of designing material makes that all thereby the identical or different specific inductivity that makes material monolithic and magnetic permeability are certain rule and arrange for specific inductivity and the magnetic permeability of material each point, the magnetic permeability that rule is arranged and specific inductivity can make material that hertzian wave is had response on the macroscopic view, for example converge hertzian wave, divergent electromagnetic ripple, absorb hertzian wave etc.Such have magnetic permeability that rule arranges and specific inductivity material we be referred to as super material.
And along with the application of super material technology aspect multi-field, also more and more higher to the requirement of the thermal characteristics aspect of the substrate of super material, it is the thermal characteristics that the filler of polystyrene improves substrate that the present invention adopts stupalith.
The present invention is described in detail below in conjunction with accompanying drawing.
The invention provides a kind of super material substrate, its preparation material comprises thermoplastic resin and nano wire, and this nano wire is the stupalith nano wire.
Wherein, the stupalith nano wire accounts for 1% ~ 50% of thermoplastic resin weight.
In embodiments of the present invention, the preferred polystyrene of thermoplastic resin, the preferred aluminum nitride nanowire of stupalith nano wire.In other embodiments, thermoplastic resin also can be selected polyethylene, polypropylene or polyvinyl chloride for use, and the stupalith nano wire also can be selected alumina nanowires or beta-silicon nitride nanowire for use.
Fig. 1 is preparation method's the schema of the super material substrate of the embodiment of the invention.As shown in Figure 1, the preparation method of super material substrate comprises:
Step S1: the stupalith nano wire is mixed the formation mixing liquid with the thermoplastic resin solution;
In step S1, the preferred aluminum nitride nanowire of stupalith nano wire, the preferred polystyrene solution of thermoplastic resin solution.Wherein, the preparation method of polystyrene solution is preferred: polystyrene is dissolved in the vinylbenzene, and the mass ratio that is made into polystyrene is the styrene solution of 10% ~ 30% polystyrene.The preparation method of the preferred aluminum nitride nanowire of stupalith nano wire consults Fig. 2.
Fig. 2 is preparation method's the schema of the aluminum nitride nanowire of the embodiment of the invention.As shown in Figure 2, the preparation method of aluminum nitride nanowire comprises:
Step 101: will mix as aluminium powder and the ammonium chloride powder of the raw material of stupalith nano wire, obtain mixed powder;
In step 101, the step that aluminium powder and ammonium chloride powder are mixed comprises: aluminium powder and ammonium chloride powder are mixed according to the weight ratio of 2:1 ~ 4:1.Aluminium powder of the present invention and ammonium chloride powder preferably mix according to the part by weight of 3:1, but in actually operating, the weight ratio regular meeting of different aluminium powders and ammonium chloride powder causes the pattern of the aluminum nitride nanowire that generates different, aluminum nitride nanowire was shaped as club shaped structure when aluminium powder and ammonium chloride powder part by weight were 4:1, the nano wire that is shaped as even thickness of aluminum nitride nanowire when aluminium powder and ammonium chloride powder part by weight are 3:1, the centre has been mingled with some laminated structures, and aluminum nitride nanowire was shaped as the very not uniform nano wire of thickness when aluminium powder and ammonium chloride powder part by weight were 2:1.Therefore in practice, difference also can be adjusted the part by weight of aluminium powder and ammonium chloride powder as required, and for example: the part by weight of revising aluminium powder and ammonium chloride powder is that 2.5:1 or the part by weight of revising aluminium powder and ammonium chloride powder are 3.5:1.
Step 102: mixed powder is fed nitrogen and heats;
In step 102, the step that the mixed powder of aluminium powder and ammonium chloride powder is heated comprises: put into aluminium oxide boat after will mixed powder grinding evenly; Aluminium oxide boat is put into through pretreated alumina tube, and the heat-up rate with 10 ℃/min ~ 20 ℃/min is raised to 1000 ℃ ~ 1200 ℃ then, and feeds the argon gas of 90sccm ~ 110sccm in being raised to 1000 ℃ ~ 1200 ℃ temperature-rise period in the alumina tube; After rising to 1000 ℃ ~ 1200 ℃, feeding flow is the hydrogen of 90sccm ~ 110sccm and the gas mixture of nitrogen, closes hydrogen and makes aluminium oxide boat be incubated 1 ~ 3 hour in nitrogen.Wherein, the volume ratio of hydrogen is 5% ~ 15% in the gas mixture of hydrogen and nitrogen, and the purpose that charges into hydrogen is in order to reduce the caking phenomenon in the reaction, to improve the output of aluminum nitride nanowire.Pretreated step comprises: feed argon gas in alumina tube, get rid of oxygen and water vapour in the alumina tube.Thereby pretreated purpose is to remove water vapour in the pipe and oxygen to avoid they and aluminium powder or the ammonium chloride powder influence that reacts to make the result, and the argon gas that charges into to be rare gas element be difficult to produce reacts, can protect production environment.
Need to prove that different heat-up rates has influence to the ratio of aluminium nitride, aluminium and aluminum oxide in the reaction product, the reason of the preferred 15 ℃/min of present embodiment is that the production rate of aluminium nitride under the situation of 15 ℃/min is higher.Different temperature of reaction also has influence to the ratio of aluminium nitride, aluminium and aluminum oxide in the reaction product, and temperature is spent low then can causing and reacted not exclusively, the content of aluminium in the product is increased, and the too high meeting of temperature causes the nano wire thickness inhomogeneous.Present embodiment is product aluminium nitride content height and nano wire even thickness under this temperature for the reason of temperature of reaction for preferred 1100 ℃.In other embodiments, these numerical value are also can be as requested different and do respective change, for example: for making reacting phase the heat-up rate that relaxes with 10 ℃/min is heated up, or heat up with the heat-up rate of 20 ℃/min for adding fast response; For the efficient that adds fast response rises to 1200 ℃ with temperature; For the efficient that reduces reaction rises to 1000 ℃ with temperature, for guaranteeing that the argon gas that the interior cleanliness factor of pipe strengthens feeding is 110sccm; The argon gas that reduces feeding for reducing cost is 90sccm.
Simultaneously, after rising to 1100 ℃, present embodiment preferably feeds the gas mixture insulation 2 hours of hydrogen that flow is 100sccm and nitrogen, in other embodiments, according to the concrete numerical value that how much changes of the amount of reactant, for example: feeding flow is the hydrogen of 90sccm and the gas mixture of nitrogen; The hydrogen of feeding 110sccm and nitrogen; Feeding flow is the hydrogen of 100sccm and the gas mixture of nitrogen; Gas mixture is incubated 1 hour in nitrogen; Gas mixture is incubated 3 hours in nitrogen; Gas mixture is incubated 2 hours in nitrogen.
Step 103: cooling obtains aluminum nitride nanowire after heating.
In step 103, after the heating, the mixed powder of aluminium powder and ammonium chloride powder is chilled to room temperature under nitrogen surrounds, can obtain aluminum nitride nanowire.
Step S2: add solidifying agent in mixing liquid, be poured into hot pressing in the mould after stirring and obtain prepared substrate, wherein hot pressing temperature is that 75 ℃ ~ 220 ℃, hot pressing pressure are 5 ~ 30MPa.
In step S2, be that 1% ~ 50% aluminum nitride nanowire of polystyrene adds and contains the styrene solution of polystyrene with quality, and stir and obtain mixed solution.The purpose that adds solidifying agent in the mixing solutions is to accelerate the curing of polystyrene.The preferred N of the solidifying agent of present embodiment, accelerine vinylbenzene, in other embodiments, solidifying agent also can be selected dimethyl amine benzene or dimethylaniline for use.Need to prove that the volume ratio of solidifying agent and mixing liquid is 1:1 ~ 4:1.After adding solidifying agent, for the curing that promotes polystyrene, the speed of response of accelerating this reaction, can in mixing liquid, add promotor and catalyzer, perhaps a kind of among both.The preferred naphthoic acid cobalt of present embodiment is that promotor, methylethyl ketone peroxide are catalyzer.
The embodiment of the invention preferably is that 30% aluminum nitride nanowire of the styrene solution of polystyrene adds the styrene solution of polystyrene and stirs with quality.The concentration difference of polystyrene according to actual needs, concrete numerical value also can be changed, for example: the quality of aluminum nitride nanowire be polystyrene styrene solution 40%; The quality of aluminum nitride nanowire be polystyrene styrene solution 20%.
In the embodiment of the invention, preferably add N, the massfraction of accelerine is 10% N, and the massfraction of accelerine styrene solution 2 parts by volume and naphthoic acid cobalt is styrene solution 2 parts by volume of 6% naphthoic acid cobalt, and mixes.Phthalic acid dicarbaldehyde solution 3 ~ 5 parts by volume that add methylethyl ketone peroxide then, wherein the massfraction of methylethyl ketone peroxide is 40% ~ 60% in the phthalic acid dicarbaldehyde solution of every part of methylethyl ketone peroxide, and stirs.According to the variation of reaction conditions and reactant quality, above-mentioned numerical value also can change accordingly, for example: N, N in the accelerine styrene solution, the massfraction of accelerine are 5% or 15%; The massfraction of the naphthoic acid cobalt of the styrene solution of naphthoic acid cobalt is 5% or 10%; N, accelerine styrene solution 1 parts by volume or 4 parts by volume; Styrene solution 1 parts by volume or 3 parts by volume of naphthoic acid cobalt.
In the embodiment of the invention, the massfraction that preferably adds methylethyl ketone peroxide is phthalic acid dicarbaldehyde solution 4 parts by volume of 50% methylethyl ketone peroxide and stirs.Difference according to the reactant quality, the amount of the catalyzer that adds also can be made change, difference according to reaction environment, the ratio of methylethyl ketone peroxide also can be different in the phthalic acid dicarbaldehyde solution of methylethyl ketone peroxide, for example: phthalic acid dicarbaldehyde solution 3 parts by volume or 5 parts by volume that add methylethyl ketone peroxide; The ratio of methylethyl ketone peroxide is 40% or 60% in the phthalic acid dicarbaldehyde solution of methylethyl ketone peroxide.
The present invention is poured into mixing liquid in the mould, treat solvent evaporation after, preferably under the situation of 150 ℃ and 25MPa, be hot pressed into plate.According to environment and difference that product property is required, the temperature and pressure of hot pressing all can change, for example: treat after the solvent evaporation to be hot pressed into plate under the situation of 220 ℃ or 75 ℃; Treat under the situation of 30MPa or 5MPa, to be hot pressed into plate after the solvent evaporation.
In other embodiments, solidifying agent can also be selected dimethyl amine benzene or dimethylaniline for use, and catalyzer can also be selected methylethyl ketone peroxide liquid for use, and promotor can also be selected cobalt naphthenate, cobalt iso-octoate or Diethyl Aniline for use.
The present invention also provides a kind of super material antenna, and it comprises substrate and the artificial microstructure that is attached on this substrate, and the preparation material of substrate comprises polystyrene and stupalith nano wire.The concrete structure of this substrate and preparation method repeat no more with above super material substrate is identical herein.
In sum, it is the filler of polystyrene that the present invention adopts the stupalith nano wire, the preferred aluminum nitride nanowire of stupalith nano wire, because aluminum nitride nanowire has big specific surface area, and polystyrene has low-k and low-loss characteristics, itself and polystyrene are prepared into baseplate material, two-phase can be played and complex phase is toughness reinforcing, fine and close and improve intensity effect, can also utilize advantages such as aluminium nitride high heat conductance and low-expansion coefficient to strengthen heat dispersion and the mechanical property of baseplate material, realize low-loss, high strength, the preparation of the super material substrate of high thermal conductance.
The above only is embodiments of the invention; be not so limit claim of the present invention; every equivalent structure or equivalent flow process conversion that utilizes specification sheets of the present invention and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present invention.
Claims (10)
1. a super material substrate is characterized in that, its preparation material comprises thermoplastic resin and stupalith nano wire.
2. super material substrate according to claim 1 is characterized in that, described thermoplastic resin is polyethylene, polystyrene, polypropylene or polyvinyl chloride.
3. super material substrate according to claim 1 is characterized in that, described stupalith nano wire is aluminum nitride nanowire, alumina nanowires or beta-silicon nitride nanowire.
4. super material substrate according to claim 1 and 2 is characterized in that, described stupalith nano wire accounts for 1% ~ 50% of described thermoplastic resin weight.
5. the preparation method of a super material substrate is characterized in that, may further comprise the steps:
The stupalith nano wire is mixed the formation mixing liquid with the thermoplastic resin solution;
Add solidifying agent in described mixing liquid, be poured into hot pressing in the mould after stirring and obtain prepared substrate, wherein hot pressing temperature is that 75 ℃ ~ 220 ℃, hot pressing pressure are 5 ~ 30MPa.
6. the preparation method of super material substrate according to claim 5 is characterized in that, also adding in the described mixing liquid has promotor and/or catalyzer.
7. the preparation method of super material substrate according to claim 5 is characterized in that, the volume ratio of described solidifying agent and described mixing liquid is 1:1 ~ 4:1, and wherein said solidifying agent is N, accelerine vinylbenzene, dimethyl amine benzene or dimethylaniline.
8. the preparation method of super material substrate according to claim 6 is characterized in that, described catalyzer is methylethyl ketone peroxide or methylethyl ketone peroxide liquid.
9. the preparation method of super material substrate according to claim 6 is characterized in that, described promotor is naphthoic acid cobalt, cobalt naphthenate, cobalt iso-octoate or Diethyl Aniline.
10. a super material antenna comprises substrate and the artificial microstructure that is attached on the described substrate, it is characterized in that described substrate is the arbitrary described substrate of claim 1 ~ 3.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109155452A (en) * | 2016-05-24 | 2019-01-04 | 德州仪器公司 | High frequency antenna structure with high heat conductance and high surface area |
| CN110534554A (en) * | 2019-09-12 | 2019-12-03 | 云谷（固安）科技有限公司 | Display panel and display device |
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| JP2011079729A (en) * | 2009-09-14 | 2011-04-21 | Osaka Univ | beta-Si3N4 NANOWIRE, METHOD FOR PRODUCTION OF THE SAME, AND RESIN COMPOSITION USING THE SAME |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2011079729A (en) * | 2009-09-14 | 2011-04-21 | Osaka Univ | beta-Si3N4 NANOWIRE, METHOD FOR PRODUCTION OF THE SAME, AND RESIN COMPOSITION USING THE SAME |
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| SUZHU YU ET. AL.: ""Dynamic Mechanical Properties of Polystyrene–Aluminum Nitride Composite"", 《JOURNAL OF APPLIED POLYMER SCIENCE》 * |
| 孙曼灵主编: "《环氧树脂应用原理与技术》", 30 September 2002 * |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109155452A (en) * | 2016-05-24 | 2019-01-04 | 德州仪器公司 | High frequency antenna structure with high heat conductance and high surface area |
| CN110534554A (en) * | 2019-09-12 | 2019-12-03 | 云谷（固安）科技有限公司 | Display panel and display device |
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