CN1315362C - Carbon nano-pipe/ceramic composite material possessing microwave absorption function and its preparation method - Google Patents

Carbon nano-pipe/ceramic composite material possessing microwave absorption function and its preparation method Download PDF

Info

Publication number
CN1315362C
CN1315362C CNB031295630A CN03129563A CN1315362C CN 1315362 C CN1315362 C CN 1315362C CN B031295630 A CNB031295630 A CN B031295630A CN 03129563 A CN03129563 A CN 03129563A CN 1315362 C CN1315362 C CN 1315362C
Authority
CN
China
Prior art keywords
cnt
carbon nano
tube
ceramic
composite
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CNB031295630A
Other languages
Chinese (zh)
Other versions
CN1514684A (en
Inventor
宁金威
张俊计
潘裕柏
黄莉萍
郭景坤
邱发贵
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Institute of Ceramics of CAS
Original Assignee
Shanghai Institute of Ceramics of CAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shanghai Institute of Ceramics of CAS filed Critical Shanghai Institute of Ceramics of CAS
Priority to CNB031295630A priority Critical patent/CN1315362C/en
Publication of CN1514684A publication Critical patent/CN1514684A/en
Application granted granted Critical
Publication of CN1315362C publication Critical patent/CN1315362C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Abstract

The present invention relates to carbon nanotube (CNT) / ceramic composite material with a microwave absorption function, which belongs to the field of functional composite material. The present invention is characterized in that the content of CNTs is 0.1 to 30 vol%; a ceramic system is one of SiO2, Si3N4, Al2O3 or ZrO2; the CNTs can be multi-wall carbon nanotubes or single-wall carbon nanotubes; the diameter of the CNTs is 20 to 40 nm, and the length-diameter ratio is at least 100/1; a surface active agent used in the process of preparation is one of C16 TMAB, PAA or C16 EO; a dispersion medium is one of chloroform, deionized water, acetone, absolute alcohol or absolute alcohol and water; composite powder is directly mixed or is prepared by a rapid sol-gel method; finally, a hot pressed sintering technique is used for preparing. The carbon nanotube (CNT) / ceramic composite material provided by the present invention has the characteristic of structural function integration. Taking CNT/SiO2 as an example, the strength and the toughness of 5 vol% of CNT/SiO2 material prepared by the rapid sol-gel method are the highest; compared with pure SiO2, the strength and the toughness are respectively increased by 140% and 53%, and the carbon nanotube (CNT) / ceramic composite material also has the characteristic of microwave absorption.

Description

Carbon nano-tube/ceramic composite and preparation method with microwave absorbing function
Technical field
The utility model relates to novel carbon nano-tube/pottery (oxide, non-oxidized substance) composite system that a class has the microwave absorbing function.Belong to function composite diphase material field.
Background technology
Carbon nano-tube has caused the great interest of researcher since the Iijima by Japan in 1991 finds [S.iijima, Nature (London), 354 (1991) 56.].Because its special structure and dielectric property, carbon nano-tube (CNTs) shows stronger wide-band microwave absorbent properties, that it also has simultaneously is in light weight, but the conductivity modulation, high-temperature oxidation resistance is strong and characteristics such as good stability, be a kind of promising desirable microwave absorption, might be used for stealth material, electromagnetic shielding material or darkroom absorbing material.But the research of this respect is also fewer at present.
Have the microwave absorbing characteristic although say nanotube, make this characteristic of material obtain embodying or using, nanotube must be compound as absorbent and other material, is prepared into composite material.At present, the researcher has begun to have carried out a series of relevant research work.
C.A.Grimes etc. [C.A.Grimes et al., Chemical Physical Letters, 319 (2000) 460.] have studied the dielectric constant spectrum of single wall CNT/ polymer composites in the 0.5-5.5GHz frequency range.Find the adding of nanotube, increased the imaginary part of the dielectric constant of material greatly, show the adding of nanotube, material is increased electromagnetic loss, prove that CNT might be used as the microwave absorbing medium really.
The absorbing property of the orientable carbon nanotubes grown film of the Zhu Changchun of Xi'an Communications University, Deng Ning [Zhu Changchun, Deng Ning, XI AN JIAOTONG UNIVERSITY Subject Index, 34,12 (2000) 102] research.Discovery has extremely strong absorbability to ruddiness and infrared laser.To the microwave of 10GHz, the suprabasil carbon nano-tube film of Cu also shows the certain absorption ability.
According to English " New Scientist " on January 26th, 2002: stealth aircraft is very expensive, suffers that in order to prevent the stealth aircraft that is parked in the airport in thunderstorm weather thunder and lightning attacks, and the Vito Mu Nike that wears of the state university of Michigan, United States has found a kind of method.He declares, utilizes one deck carbon nano-tube film to cover the stealth aircraft surface and just can prevent thunderbolt.There is the carbon nano-tube of tiny sieve aperture to be fixed in the thin epoxy resin-base of one deck, just can makes the composite panel of high conductivity and absorbing radar wave, and make the covering of stealth aircraft with it.Like this, attack if run into lightning, electric current just can flow through the composite panel surface, guides to the ground wire below the aircraft then, and can not cause catastrophic destruction (as a big hole of puncture on wing or destroy critical flight electronic equipment).The anti-thunder and lightning covering that this carbon nano-tube is made is being tested by Boeing of B-2 stealth aircraft manufacturer now.
The Shen Cengmin of Beijing University of Chemical Technology, Zhao Donglin professor [Shen Cengmin, Zhao Donglin, novel charcoal material, 16,1 (2001) 1] has studied the microwave absorbing property of nickel-plating carbon nanotube/epoxy resin.They have plated the layer of even metallic nickel with electroless plating method in carbon nano tube surface.When the carbon nano-tube microwave absorbing coating is 0.97mm at thickness, at 8GHz～18GHz, maximum absorption band 11.4GHz (R=-22.89dB) R＜-frequency range of 10dB is 3.0GHz, R＜-frequency range of 5dB is 4.7GHz.The nickel-plating carbon nanotube microwave absorbing coating is under same thickness, and maximum absorption band is at 14GHz (R=-11.85dB), R＜-frequency range of 10dB is 2.23GHz, R＜-frequency range of 5dB is 4.6GHz.
Glatkowski Paul[Glatkowski Paul, Mack Patrick, Conroy Jeffrey et al., USPatent 6,265,465 (July, 2001)] etc. prepared a kind of electromagnetic shielding (Electrmagneticshielding) function CNT/ polymer (PET) composite material that has.The content of CNT is from 0.001wt% to 15wt%, and draw ratio＞100 align portion C NTs by applying shearing force.Its reflectivity and dielectric constant have been tested.
Electromagnetic performance research situation from present CNT composite material just is confined on the CNT/ organic polymer composite material; Aspect the microwave absorbing research of CNT/ ceramic matric composite report is not being arranged as yet.[USPatent6,420,293 such as S.Chang, B1 (Jul 16,2002)] reported that the carbon nano-tube/ceramic nanocomposites that has than high-mechanical property, used powder are nanocrystalline powder, particle size range but does not report that its material system has microwave absorbing property in 1-100nm.To being initial powder body material with amorphous powder with greater than 100nm crystalline state powder, and the structure-function integration CNT/ ceramic composite bodies system with microwave absorbing function and high mechanical property, yet there are no document announcement.
For the CNT/ organic polymer, its poor mechanical property, serviceability temperature is low, can not carry, and also easy deformation is aging down at a high speed.Such as, aboard, can only be lower than under the 3marh (Mach) and could use.Do microwave absorbing material if use carbon nano-tube/ceramic composite, then can show distinctive high-strength, high hard, the high chemical stability of ceramic material, excellent performance such as high temperature resistant, can satisfy load, high temperature resistant, exacting terms such as use down at a high speed.The application of exploitation aspect radar absorbing (RAM) and darkroom absorbing material.
Summary of the invention
Present situation at CNT/ ceramic research in the present CNT microwave absorbing composite material research the invention provides a kind of CNT/ ceramic composite and preparation method with microwave absorbing function.An outstanding advantage of the present invention is exactly the CNT/ ceramic composite that has prepared structure-function integration.
The preparation of material may further comprise the steps:
(1) dispersion of CNT and dispersant are selected:
The CNTs that the present invention selects for use is the carbon nano-tube that nanometer port, Shenzhen Co., Ltd produces, and the purity of carbon nano-tube is greater than 90%, and diameter is at 20～40nm, and draw ratio is greater than 100, and density is 2.0g/cm 3, can be many walls, also can be single wall.
The decentralized medium of described CNT is analytically pure chloroform, deionized water, absolute ethyl alcohol.
16 alkyl-3 methyl ammonium bromide (the C that described surfactant adopts Shanghai chemical reagents corporation to provide 16TMAB, molecular weight 364.45), the C that produces of polyacrylic acid (PAA, molecular weight 5000) and U.S. Aldrich Chemical Company 16EO.These three kinds of surfactants can play good peptizaiton to CNT, it keeps the mechanism of dispersion stabilization mainly to be: organic polymer is adsorbed in carbon nano tube surface, rely on the Coulomb repulsion effect after the carbon nano tube surface of being adsorbed in of intermolecular steric hindrance and/or charged polyelectrolyte to overcome Van der Waals force between the carbon nano-tube, thereby play the effect of dispersing Nano carbon tubes.
Described surfactant concentrations scope forms concentration (CMC) greater than its critical micell.
(2) CNT/ ceramic composite powder preparation:
Direct mixing method: take by weighing a certain amount of CNT and stir in decentralized medium, ultrasonic dispersion certain hour stirs ultrasonic dispersion with ceramic powder simultaneously in identical decentralized medium, then two kinds of suspension is mixed ultrasonic again dispersion certain hour.In adding the process of thermal agitation, make the organic dispersion medium volatilization, obtain composite granule.Ceramic powder employing relatively cheap (comparing with the price of nano-powder) unformed powder of price or particle diameter are greater than the crystalline state powder of 0.1 μ m.
Fast sol gel method: the CNT adding is contained in ceramic powder predecessor (metal alkoxide) aqueous solution of surfactant, stir, ultrasonic dispersion certain hour adds acid and/or base catalyst, make the hydrolysis of ceramic powder predecessor form colloidal sol, form gel at last.Washing, drying obtains composite granule.
Homogeneous precipitation method: the CNT adding is contained in ceramic powder predecessor (salt) aqueous solution of surfactant, stir, ultrasonic dispersion certain hour adds the precipitation from homogeneous solution agent, stirs, and obtains precipitation.To precipitate calcining, obtain the composite granule of amorphous ceramic powder predecessor and CNT.
Ceramic base of the present invention comprises SiO 2, ZrO 2, Al 2O 3Or Si 3N 4In a kind of, the CNT content range of being introduced: 1vol%～10vol%.
(3) finally burning till of composite material:
Composite material burn till the employing hot-pressing sintering technique.Concrete process conditions are temperature 1300-1600 ℃, and pressure 30MPa is incubated 0.5 hour.When sintering, the composite granule of various different CNT content forms Gradient distribution as requested, thereby realizes the different microwave absorbing property that require.
Material system provided by the present invention has the microwave absorbing function, also has the high mechanical property of pottery, has the characteristics of structure-function integration.Can be used on the electronic equipment and other stealthy device to microwave susceptible.It is desirable radar wave absorbing material (RAM).For example: the 5vol%CNT/SiO of fast sol-gel method preparation 2The intensity and the toughness of material are the highest, with pure SiO 2Compare, improved 140% and 53% respectively; And have the microwave absorbing characteristic again.Embody structure-function integration feature.
Description of drawings
Table 1 is CNT/SiO 2The microwave absorbing data of part sample
Fig. 1 is the TEM pattern of CNT that the present invention adopts
Fig. 2 is 10vol%CNT/SiO 2The X-ray diffractogram of block behind the composite material sintering
Fig. 3 is the composite granule transmission electron microscope pattern of sol-gel process preparation
Fig. 4 is CNT/SiO 2The high-resolution photo of composite material interface
Fig. 5 is 3vol%CNT/Si among the present invention 3N 4The microwave absorbing property of material (reflectivity-frequency relation curve)
Fig. 6 is the TEM pattern that homogeneous precipitation method prepares the 5vol%CNT/ composite granule
Embodiment
Embodiment 1: direct mixing method prepares 10vol%CNT/SiO 2Composite material
SiO 2Powder meta particle diameter is 3.1 microns, by Shanghai silicate is made by oneself.
Get 2g CNT and 19.44gSiO 2Powder stirs in the 400ml chloroform respectively, and ultrasonic dispersion 10 minutes mixes two kinds of suspension then and stirs, ultrasonic again dispersion 5 minutes, and powerful stirring under heating condition at last, the chloroform volatilization obtains composite granule.Composite granule is crossed 200 mesh sieves, then at 30MPa, N 2Under the atmosphere, 1300 ℃ of hot pressed sinterings obtain block materials.Fig. 2 is CNT and material 10vol%CNT/SiO 2X-ray diffractogram behind the sintering, as we can see from the figure: carbon nano-tube still keeps its architectural feature behind sintering.Block becomes corresponding size, test performance through cut.
Embodiment 2: sol-gel process prepares 5vol%CNT/SiO 2
Surfactant CTMAB90mg is dissolved in the 200ml deionized water, mixes with the 78ml tetraethoxysilane; Take by weighing CNT1.0g, add in this mixed solution, stir ultrasonic dispersion 10 minutes.Then under magnetic stirrer, hydrochloric acid (HCl) solution that dropwise adds 1.16M is regulated pH value to 0.5～1, after continuing to stir hydrolysis 1～5h, dropwise add about the ammonia spirit regulator solution pH value to 10 of 1.2M, colloidal sol forms gel fast about 5 minutes.Gel is left standstill 0.5-2h, and suction filtration is used deionized water wash then, removes NH wherein 4Cl uses absolute ethanol washing again.Filter cake after the washing 100 ℃ of oven dry, is ground, cross 200 mesh sieves.Then in chamber type electric resistance furnace 500 ℃ the calcining 1～2h, the CNT/SiO that is uniformly mixed 2Composite granule, the transmission electron microscope pattern photo of powder as shown in Figure 3.Press example 1 described method sintering, processing sample and test performance then.Fig. 4 is a material sintering rear interface high-resolution photo, shows CNT and SiO 2Matrix has good physical chemistry compatibility.Table 1 is the reflectivity data for preparing the composite material millimere-wave band with embodiment 2 methods.
Embodiment 3 direct mixing methods prepare 3vol%CNT/Si 3N 4Composite material
Prepare the method for composite granule according to embodiment 1, preparation 1wt%CNT/Si 3N 4Composite granule, then at 1600 ℃, 30MPa, N 2Hot pressed sintering under the atmosphere.Be processed into corresponding size, test its reflectivity.Fig. 5 is its reflectivity collection of illustrative plates in millimere-wave band.
Embodiment 4 homogeneous precipitation methods prepare 5vol%CNT/A1 2O 3Composite material
Take by weighing 0.5gCNT, join the NH that 1.85L concentration is 2M 4HCO 3In the aqueous solution, stir, ultrasonic dispersion certain hour is the Al (NO of 0.2M then with 1.85L concentration 3) 2Solution splashes in the powerful mixed solution that stirs, and obtains precipitation.After sedimentation and filtration, drying, calcine 1h for 500 ℃, obtain the composite granule of unbodied forerunner and CNT.With 1400 ℃ of powders, 30MPa hot pressed sintering, be incubated half an hour, obtain CNT/Al 2O 3Composite material.
Table 1
CNT (vol％) Size (mm) Frequency band (GHz) Reflectivity (dB)
1 6.92×3.42× 30 26.5-40 ≥10.47
5 6.92×3.42× 30 26.5-40 ≥54.94
10 6.90×3.40× 6.27 26.5-40 ≥40.21

Claims (3)

1. the preparation method with carbon nano-tube/ceramic composite of microwave absorbing function is characterized in that comprising the preparation of carbon nano-tube/ceramic composite powder and is prepared into described composite material two big steps by this composite granule; Wherein the content of carbon nanotubes of 1. being introduced in described carbon nano-tube/ceramic composite powder is 1～10vol%; Described ceramic systems is SiO 2, ZrO 2, Al 2O 3Or Si 3N 4In a kind of; 2. the preparation of carbon nano-tube/ceramic composite powder can be adopted in following three kinds of methods any one:
(1) direct mixing method be with carbon nano-tube in decentralized medium, stir, ultrasonic dispersion; Simultaneously ceramic powder is stirred in identical decentralized medium, ultrasonic dispersion, then two kinds of suspension mixing, ultrasonic dispersion and heating, make the dispersant volatilization, obtain composite granule, described dispersant is a kind of in chloroform, deionized water or the absolute ethyl alcohol;
(2) sol-gel process is that carbon nano-tube is added in the aqueous solution of the ceramic powder predecessor that contains surfactant, after stirring, ultrasonic dispersion, add acid and/or base catalyst, make the hydrolysis of ceramic powder predecessor form colloidal sol, form gel, washing at last, dry and make composite granule; Described surfactant is 16 alkyl-3 methyl ammonium bromide, polyacrylic acid or C 16A kind of among the EO;
(3) homogeneous precipitation method is carbon nano-tube to be added contain in the ceramic powder predecessor aqueous solution of surfactant, adds the precipitation from homogeneous solution agent after stirring, ultrasonic dispersion, stirs again, makes it precipitation, makes composite granule through calcining;
It is to adopt hot-pressing sintering technique that described above-mentioned composite granule is prepared into composite material, and sintering temperature 1300-1600 ℃, pressure is 30MPa.
2. by the described preparation method of claim 1, it is characterized in that described carbon nano-tube is Single Walled Carbon Nanotube or is multi-walled carbon nano-tubes with carbon nano-tube/ceramic composite of microwave absorbing function; Draw ratio was at least 100: 1, and diameter is 20～40nm.
3. by claim 1 or 2 described carbon nano-tube/ceramic composite preparation methods, it is characterized in that specifically consisting of 10vol%CNT/90vol%SiO with microwave absorbing function 2Or be 5vol%CNT/95vol%SiO 2, or 1vol%CNT/99vol%SiO 2Or 3vol%CNT/97vol%Si 3N 4Or be 5vol%CNT/95vol%Al 2O 3
CNB031295630A 2003-06-27 2003-06-27 Carbon nano-pipe/ceramic composite material possessing microwave absorption function and its preparation method Expired - Fee Related CN1315362C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNB031295630A CN1315362C (en) 2003-06-27 2003-06-27 Carbon nano-pipe/ceramic composite material possessing microwave absorption function and its preparation method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNB031295630A CN1315362C (en) 2003-06-27 2003-06-27 Carbon nano-pipe/ceramic composite material possessing microwave absorption function and its preparation method

Publications (2)

Publication Number Publication Date
CN1514684A CN1514684A (en) 2004-07-21
CN1315362C true CN1315362C (en) 2007-05-09

Family

ID=34239744

Family Applications (1)

Application Number Title Priority Date Filing Date
CNB031295630A Expired - Fee Related CN1315362C (en) 2003-06-27 2003-06-27 Carbon nano-pipe/ceramic composite material possessing microwave absorption function and its preparation method

Country Status (1)

Country Link
CN (1) CN1315362C (en)

Cited By (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101458595B (en) * 2007-12-12 2011-06-08 清华大学 Touch screen and display device
CN101458609B (en) * 2007-12-14 2011-11-09 清华大学 Touch screen and display device
CN101458600B (en) * 2007-12-14 2011-11-30 清华大学 Touch screen and display device
US8105126B2 (en) 2008-07-04 2012-01-31 Tsinghua University Method for fabricating touch panel
US8111245B2 (en) 2007-12-21 2012-02-07 Tsinghua University Touch panel and display device using the same
US8115742B2 (en) 2007-12-12 2012-02-14 Tsinghua University Touch panel and display device using the same
US8125878B2 (en) 2007-12-27 2012-02-28 Tsinghua University Touch panel and display device using the same
US8199119B2 (en) 2007-12-12 2012-06-12 Beijing Funate Innovation Technology Co., Ltd. Touch panel and display device using the same
US8237669B2 (en) 2007-12-27 2012-08-07 Tsinghua University Touch panel and display device using the same
US8237674B2 (en) 2007-12-12 2012-08-07 Tsinghua University Touch panel and display device using the same
US8237668B2 (en) 2007-12-27 2012-08-07 Tsinghua University Touch control device
US8237672B2 (en) 2007-12-14 2012-08-07 Tsinghua University Touch panel and display device using the same
US8237675B2 (en) 2007-12-27 2012-08-07 Tsinghua University Touch panel and display device using the same
US8237670B2 (en) 2007-12-12 2012-08-07 Tsinghua University Touch panel and display device using the same
US8243030B2 (en) 2007-12-21 2012-08-14 Tsinghua University Touch panel and display device using the same
US8243029B2 (en) 2007-12-14 2012-08-14 Tsinghua University Touch panel and display device using the same
US8248377B2 (en) 2007-10-23 2012-08-21 Tsinghua University Touch panel
US8248379B2 (en) 2007-12-14 2012-08-21 Tsinghua University Touch panel, method for making the same, and display device adopting the same
US8248380B2 (en) 2007-12-14 2012-08-21 Tsinghua University Touch panel and display device using the same
US8248378B2 (en) 2007-12-21 2012-08-21 Tsinghua University Touch panel and display device using the same
US8248381B2 (en) 2007-12-12 2012-08-21 Tsinghua University Touch panel and display device using the same
US8253701B2 (en) 2007-12-14 2012-08-28 Tsinghua University Touch panel, method for making the same, and display device adopting the same
US8260378B2 (en) 2008-08-22 2012-09-04 Tsinghua University Mobile phone
US8325585B2 (en) 2007-12-12 2012-12-04 Tsinghua University Touch panel and display device using the same
US8325145B2 (en) 2007-12-27 2012-12-04 Tsinghua University Touch panel and display device using the same
US8325146B2 (en) 2007-12-21 2012-12-04 Tsinghua University Touch panel and display device using the same
US8346316B2 (en) 2008-08-22 2013-01-01 Tsinghua University Personal digital assistant
US8363017B2 (en) 2007-12-12 2013-01-29 Beijing Funate Innovation Technology Co., Ltd. Touch panel and display device using the same
US8390580B2 (en) 2008-07-09 2013-03-05 Tsinghua University Touch panel, liquid crystal display screen using the same, and methods for making the touch panel and the liquid crystal display screen
US8411044B2 (en) 2007-12-14 2013-04-02 Tsinghua University Touch panel, method for making the same, and display device adopting the same
US8502786B2 (en) 2007-10-23 2013-08-06 Tsinghua University Touch panel
US8542212B2 (en) 2007-12-12 2013-09-24 Tsinghua University Touch panel, method for making the same, and display device adopting the same
US8574393B2 (en) 2007-12-21 2013-11-05 Tsinghua University Method for making touch panel
US8585855B2 (en) 2007-12-21 2013-11-19 Tsinghua University Method for making touch panel
US9040159B2 (en) 2007-12-12 2015-05-26 Tsinghua University Electronic element having carbon nanotubes
US9077793B2 (en) 2009-06-12 2015-07-07 Tsinghua University Carbon nanotube based flexible mobile phone

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1300054C (en) * 2004-07-30 2007-02-14 广东工业大学 Composite microwave absorbent of Nano carbon tube, and preparation method
CN100436367C (en) * 2005-03-25 2008-11-26 鸿富锦精密工业（深圳）有限公司 Ceramic material and process for preparing same
CN101186130B (en) * 2007-12-07 2013-01-02 中国科学院上海硅酸盐研究所 Ceramic matrix layered material with high wave absorbing efficiency and preparation method
CN102674819B (en) * 2012-05-16 2013-10-16 台州学院 High-toughness aluminum oxide ceramic, and preparation method and application thereof
CN105001681B (en) * 2015-06-18 2017-09-19 成都石大力盾科技有限公司 One kind prepares ZrO2The method of MWCNTs nano-hybrid materials
CN104987125B (en) * 2015-07-10 2017-05-31 国家电网公司 A kind of preparation method of carbon nano-tube modification foamed ceramics
CN109971420B (en) * 2019-04-02 2022-03-29 安徽理工大学 Preparation method and application of one-dimensional zirconium dioxide/carbon nanotube nano composite material
CN111916916B (en) * 2020-07-10 2022-07-29 哈尔滨工业大学（威海） Carbon nanotube-based three-dimensional network structure composite wave-absorbing material and preparation method thereof
CN114516754B (en) * 2021-12-27 2023-04-07 湘潭顺络电子有限公司 Ultrahigh-strength high-toughness low-density zirconia ceramic and preparation method and application thereof

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6420293B1 (en) * 2000-08-25 2002-07-16 Rensselaer Polytechnic Institute Ceramic matrix nanocomposites containing carbon nanotubes for enhanced mechanical behavior

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6420293B1 (en) * 2000-08-25 2002-07-16 Rensselaer Polytechnic Institute Ceramic matrix nanocomposites containing carbon nanotubes for enhanced mechanical behavior

Cited By (46)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8502786B2 (en) 2007-10-23 2013-08-06 Tsinghua University Touch panel
US8248377B2 (en) 2007-10-23 2012-08-21 Tsinghua University Touch panel
CN101458595B (en) * 2007-12-12 2011-06-08 清华大学 Touch screen and display device
US9040159B2 (en) 2007-12-12 2015-05-26 Tsinghua University Electronic element having carbon nanotubes
US8542212B2 (en) 2007-12-12 2013-09-24 Tsinghua University Touch panel, method for making the same, and display device adopting the same
US8115742B2 (en) 2007-12-12 2012-02-14 Tsinghua University Touch panel and display device using the same
US8237671B2 (en) 2007-12-12 2012-08-07 Tsinghua University Touch panel and display device using the same
US8199119B2 (en) 2007-12-12 2012-06-12 Beijing Funate Innovation Technology Co., Ltd. Touch panel and display device using the same
US8237670B2 (en) 2007-12-12 2012-08-07 Tsinghua University Touch panel and display device using the same
US8363017B2 (en) 2007-12-12 2013-01-29 Beijing Funate Innovation Technology Co., Ltd. Touch panel and display device using the same
US8248381B2 (en) 2007-12-12 2012-08-21 Tsinghua University Touch panel and display device using the same
US8325585B2 (en) 2007-12-12 2012-12-04 Tsinghua University Touch panel and display device using the same
US8237674B2 (en) 2007-12-12 2012-08-07 Tsinghua University Touch panel and display device using the same
US8253701B2 (en) 2007-12-14 2012-08-28 Tsinghua University Touch panel, method for making the same, and display device adopting the same
US8253700B2 (en) 2007-12-14 2012-08-28 Tsinghua University Touch panel and display device using the same
CN101458609B (en) * 2007-12-14 2011-11-09 清华大学 Touch screen and display device
US8237672B2 (en) 2007-12-14 2012-08-07 Tsinghua University Touch panel and display device using the same
US8237673B2 (en) 2007-12-14 2012-08-07 Tsinghua University Touch panel and display device using the same
US8248380B2 (en) 2007-12-14 2012-08-21 Tsinghua University Touch panel and display device using the same
US8411044B2 (en) 2007-12-14 2013-04-02 Tsinghua University Touch panel, method for making the same, and display device adopting the same
CN101458600B (en) * 2007-12-14 2011-11-30 清华大学 Touch screen and display device
US8248379B2 (en) 2007-12-14 2012-08-21 Tsinghua University Touch panel, method for making the same, and display device adopting the same
US8243029B2 (en) 2007-12-14 2012-08-14 Tsinghua University Touch panel and display device using the same
US8325146B2 (en) 2007-12-21 2012-12-04 Tsinghua University Touch panel and display device using the same
US8243030B2 (en) 2007-12-21 2012-08-14 Tsinghua University Touch panel and display device using the same
US8248378B2 (en) 2007-12-21 2012-08-21 Tsinghua University Touch panel and display device using the same
US8585855B2 (en) 2007-12-21 2013-11-19 Tsinghua University Method for making touch panel
US8574393B2 (en) 2007-12-21 2013-11-05 Tsinghua University Method for making touch panel
US8111245B2 (en) 2007-12-21 2012-02-07 Tsinghua University Touch panel and display device using the same
US8237675B2 (en) 2007-12-27 2012-08-07 Tsinghua University Touch panel and display device using the same
US8237668B2 (en) 2007-12-27 2012-08-07 Tsinghua University Touch control device
US8125878B2 (en) 2007-12-27 2012-02-28 Tsinghua University Touch panel and display device using the same
US8325145B2 (en) 2007-12-27 2012-12-04 Tsinghua University Touch panel and display device using the same
US8237669B2 (en) 2007-12-27 2012-08-07 Tsinghua University Touch panel and display device using the same
US8199123B2 (en) 2008-07-04 2012-06-12 Tsinghua University Method for making liquid crystal display screen
US8228308B2 (en) 2008-07-04 2012-07-24 Tsinghua University Method for making liquid crystal display adopting touch panel
US8237679B2 (en) 2008-07-04 2012-08-07 Tsinghua University Liquid crystal display screen
US8237680B2 (en) 2008-07-04 2012-08-07 Tsinghua University Touch panel
US8237677B2 (en) 2008-07-04 2012-08-07 Tsinghua University Liquid crystal display screen
US8105126B2 (en) 2008-07-04 2012-01-31 Tsinghua University Method for fabricating touch panel
US8390580B2 (en) 2008-07-09 2013-03-05 Tsinghua University Touch panel, liquid crystal display screen using the same, and methods for making the touch panel and the liquid crystal display screen
US8411051B2 (en) 2008-07-09 2013-04-02 Tsinghua University Liquid crystal display screen
US8411052B2 (en) 2008-07-09 2013-04-02 Tsinghua University Touch panel, liquid crystal display screen using the same, and methods for making the touch panel and the liquid crystal display screen
US8346316B2 (en) 2008-08-22 2013-01-01 Tsinghua University Personal digital assistant
US8260378B2 (en) 2008-08-22 2012-09-04 Tsinghua University Mobile phone
US9077793B2 (en) 2009-06-12 2015-07-07 Tsinghua University Carbon nanotube based flexible mobile phone

Also Published As

Publication number Publication date
CN1514684A (en) 2004-07-21

Similar Documents

Publication Publication Date Title
CN1315362C (en) Carbon nano-pipe/ceramic composite material possessing microwave absorption function and its preparation method
CN102533216B (en) Ferroferric oxide/reduced graphene oxide composite wave-absorbing material with hollow hemisphere structure and preparation method
CN100386258C (en) Aerogel carbon nanotube and its preparation method and application
CN111132533A (en) MXene/silver nanowire composite electromagnetic shielding film
CN105338799A (en) Nanocomposite made of magnetic-metal-doped multiwalled carbon nanotubes/tin dioxide
CN108521754A (en) Porous carbon-based electromagnetic wave absorption agent of one kind and preparation method thereof
CN111916916B (en) Carbon nanotube-based three-dimensional network structure composite wave-absorbing material and preparation method thereof
Shu et al. Fabrication of Co/C composites derived from Co-based metal organic frameworks with broadband and efficient electromagnetic absorption
CN114149786B (en) Interface polarization enhanced TiO 2 Preparation method of RGO wave-absorbing material
CN115058616B (en) Co/C/CNTs composite wave-absorbing material with one-dimensional micro-nano hierarchical structure and preparation method thereof
CN108774562A (en) A kind of MOF-Ti/ polyaniline nano-composite materials ER fluid and preparation method thereof
CN109128138A (en) A kind of nucleocapsid heterojunction structure magnetic fibre and its preparation and application method
Liu et al. Ni/C-carbon nanotube multidimensional heterospheres for highly efficient microwave absorbers
CN108822797A (en) A kind of titanium silicon-carbon composite wave-absorbing agent and the preparation method and application thereof
CN109971420B (en) Preparation method and application of one-dimensional zirconium dioxide/carbon nanotube nano composite material
WO2012026686A2 (en) Nanocomposite including carbon nanotubes and platinum and method of manufacturing the same
CN113415796B (en) Application of Cu/C composite material as electromagnetic wave absorption material
CN111943254B (en) Uniformly dispersed zinc oxide-multilayer graphene composite material and preparation method thereof
CN114614272A (en) MXene/Co/C composite wave-absorbing material derived from MOF and preparation method thereof
CN115246640A (en) Three-dimensional HCNTs @ Ti 3 C 2 T x MXene hybrid aerogel microspheres and preparation method and application thereof
CN114956830A (en) Boron nitride coated carbon nanotube reinforced polymer conversion ceramic-based wave-absorbing material and preparation method thereof
CN114684802B (en) Magnetic iron-cobalt-nickel alloy/carbon series composite wave-absorbing material and preparation method and application thereof
CN115716641A (en) MOFs derivative material with electromagnetic wave absorption performance and preparation method thereof
CN117229756B (en) Preparation method of MXene-based nano composite wave-absorbing material with adjustable interlayer spacing
CN115318210B (en) Preparation method and application of cobalt disulfide/porous carbon/silicon carbide aerogel composite material for electromagnetic shielding

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20070509

Termination date: 20100627