CN100436367C - Ceramic material and process for preparing same - Google Patents
Ceramic material and process for preparing same Download PDFInfo
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- CN100436367C CN100436367C CNB2005100338593A CN200510033859A CN100436367C CN 100436367 C CN100436367 C CN 100436367C CN B2005100338593 A CNB2005100338593 A CN B2005100338593A CN 200510033859 A CN200510033859 A CN 200510033859A CN 100436367 C CN100436367 C CN 100436367C
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- stupalith
- manufacture method
- carbon nanotube
- hot
- ceramic
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Abstract
The present invention relates to ceramic material which comprises ceramic bases and an array of carbon nanotubes distributed in the ceramic bases. The present invention also relates to a manufacturing method of the ceramic material, which comprises the following steps: providing the array of carbon nanotubes; filling the ceramic bases among the carbon nanotubes; hot pressing the array of the carbon nanotubes filled with the ceramic bases to form the ceramic material. The carbon nanotubes which are mutually parallel are distributed in the ceramic material. As the carbon nanotubes have unidirectional heat-conducting properties, the ceramic material forms a plurality of heat conducting passages in the axial direction of the carbon nanotubes. Thus, the ceramic material has good heat-conducting properties; simultaneously, the ceramic material has good heat-insulating properties in the radial direction of the carbon nanotubes. Thus, the ceramic material simultaneously has heat-conducting properties and heat-insulating properties, and is multifunctional ceramic material.
Description
[technical field]
The present invention relates to a kind of stupalith, particularly a kind of stupalith that has heat conduction and heat-proof quality simultaneously.
[background technology]
The human lives with produce in employed product be by metallic substance such as iron, copper, aluminium, ceramic three big materials such as organic materials such as epoxy, rubber and ceramic ware, refractory materials are made.Stupalith is defined as: through high-temperature heat treatment process institute synthetic ceramic.
The stupalith overwhelming majority is to be made of the big formed compound of element of the little element of electronegativity in the periodic table of elements and electronegativity, and this material major part is with ionic linkage, and a part is based on covalent linkage, metallic bond.Because array configuration is many between element, stupalith has the function of multiple material, and it is general to be of wide application.All need use stupalith from automotive industry to space science and technology, the insulating brick on the space science and technology for example, the stupalith that need have excellent heat-insulating property, the pot bowl in the daily life then needs heat conduction stupalith fast, make the food heating rapidly, to save the energy.
On March 20th, 2002 was announced, the patent No. is that the Chinese patent of 98110939.X discloses a kind of aluminium nitride ceramics material with high thermal conductivity, it is by adding the technical grade additive in common aluminium nitride material, mixture as ethynylation calcium and yttrium oxide, suitably preparing high heat conduction aluminium nitride ceramics under the processing condition, its thermal conductivity reaches as high as 230W m
-1K
-1
On February 12nd, 2004 is disclosed, publication number be 20040029706A1 U.S. Patent Application Publication a kind of stupalith with heat-insulating property, it is by adding the heat-insulating property that nano carbon material is strengthened stupalith in ceramic matrix, this nano carbon material comprises: Single Walled Carbon Nanotube, multi-walled carbon nano-tubes, carbon fiber, fullerene molecule etc.Making this method of ceramic material is: prepare a ceramic size, comprising stupalith particle and solution; Nano carbon material is scattered in this ceramic size; The above-mentioned ceramic size that contains nano carbon material added carry out moulding in the preset die, thereby produce the stupalith of predetermined shape.This technology makes in the ceramic matrix by adding nano carbon material in ceramic matrix its phonon that mainly acts on that conducts heat (transmitting the particle of heat in the solid) is scatter, and reduces the heat-conductive characteristic of stupalith.
Carbon nanotube has the directional heat conductive performance, and promptly the axial heat-conduction coefficient of carbon nanotube can reach 6000w/m when 183k
2, and the radial heat-conduction coefficient is almost nil.But, fail effectively to utilize this excellent properties of carbon nanotube in the technology of this U.S. Patent Application Publication.Therefore, utilize nano carbon material to improve the stupalith heat transfer property and can this technology still have improved space.
[summary of the invention]
Below will a kind of stupalith and manufacture method thereof be described with embodiment.
For realizing foregoing, a kind of stupalith is provided, it comprises a ceramic matrix and the carbon nanotube that is distributed in this ceramic matrix, this carbon nanotube is an array structure, is arranged in parallel along same direction in this ceramic matrix.
This ceramic matrix comprises ceramic powder and coupler substantially.
This stupalith has high thermal conductivity on carbon nanotube is axial, simultaneously, directly upwards have high thermal insulation at carbon nanotube.
And, a kind of manufacture method of stupalith is provided, it may further comprise the steps:
One carbon nano pipe array is provided;
Between carbon nanotube, fill ceramic matrix;
The carbon nano pipe array that is filled with ceramic matrix is carried out hot-pressing processing, form stupalith.
The temperature of above-mentioned hot-pressing processing process is 500～700 ℃, and pressure is 10
4～10
6Kg/m
2, and the hot-pressing processing time be one hour to four hours substantially.
Above-mentioned hot-pressing processing process axially or along carbon nanotube is radially carried out along carbon nanotube.
The manufacture method of above-mentioned stupalith comprises further that also the stupalith after the hot-pressing processing is carried out hot pressed sintering to be handled, and its treatment temp is 800～1800 ℃, and pressure is 10
4～10
6Kg/m
2, and the hot pressed sintering treatment time be one hour to tens of hours substantially.
Above-mentioned hot pressed sintering treating processes is got the stupalith that a plurality of hot-pressing processing form, and axially or along carbon nanotube is radially stacked it is carried out hot pressed sintering along carbon nanotube.
Be distributed with the carbon nanotube that is parallel to each other in the stupalith of the technical program,, make this stupalith on carbon nanotube is axial, form a lot of passages of heat, have the excellent heat conducting performance because carbon nanotube has the one-way heat conduction performance; Simultaneously CNT (carbon nano-tube) directly upwards this stupalith have excellent heat-insulating property.Therefore, this stupalith has heat conductivility and heat-proof quality simultaneously, is a multifunctional ceramic material.
[description of drawings]
Fig. 1 is that the embodiment of the invention is provided with the synoptic diagram that forms catalyst layer in two substrates and the substrate therein.
Fig. 2 is the prepared carbon nano pipe array synoptic diagram of the embodiment of the invention.
Fig. 3 is that the embodiment of the invention is filled the ceramic matrix synoptic diagram.
Fig. 4 is the prepared ceramic unit synoptic diagram of the embodiment of the invention.
Fig. 5 is that a plurality of ceramic unit of the embodiment of the invention are piled up synoptic diagram along the heat conduction direction.
Fig. 6 is the formed ceramic bulk material synoptic diagram of the embodiment of the invention.
[embodiment]
Below in conjunction with drawings and Examples above-mentioned stupalith and manufacture method thereof are described in further detail
Present embodiment is made method of ceramic material, and the branch following steps are carried out: a carbon nano pipe array is provided; Between carbon nanotube, fill ceramic matrix; The carbon nano pipe array that is filled with ceramic matrix is carried out hot-pressing processing, form stupalith.
Below will specifically describe above-mentioned manufacture method.
At first, provide a carbon nano pipe array.
As shown in Figure 1, provide the substrate 11 and substrate 12 of parallel placement, this substrate 12 is positioned at the top of this substrate 11, and two substrates are fixed as levels with carrier (figure does not show), and distance can be adjusted arbitrarily between it.Uniform deposition one catalyst layer 13 in substrate 11, its material can be iron, cobalt, nickel and alloy thereof etc., and its deposition method can utilize heat deposition, electron beam deposition or sputtering method to finish.Offer a plurality of filling orifices 14 in the substrate 12.Material useable glass, quartz, silicon or the aluminum oxide etc. of two substrates, two substrates are silicon chip in the present embodiment.
Because distance can be adjusted arbitrarily between substrate 11 and the substrate 12, therefore, can adjust its distance between the two as required, the carbon nano pipe array 15 of control reaction conditions growth predetermined height.
Secondly, in carbon nano pipe array 15, fill ceramic matrix 16.
As shown in Figure 3, between two substrates, insert ceramic matrix 16 from a plurality of filling orifices 14 of substrate 12, i.e. the mixture of ceramic powder and coupler, this ceramic powder comprises SiC, ZnO, ZrO
2Deng.This filling mode is not limited thereto, as substrate 11 and substrate 12 being immersed in the mixture of ceramic powder and coupler, or directly carbon nano pipe array 15 is mixed with ceramic powder and coupler, as long as just the mixture of ceramic powder and coupler is evenly spread to can between the carbon nanotube.
Once more, carry out hot-pressing processing, form ceramic unit 20.
This hot-pressing processing is generally carried out in thermocompressor, its objective is to make ceramic matrix 16 and carbon nano pipe array 15 preliminary fixed formation ceramic unit 20.
After treating that the substrate 11 and the space of substrate 12 have been filled up by ceramic matrix 16, put into thermocompressor with being loaded with substrate 11 with the carrier of substrate 12, temperature is controlled in 500～700 ℃ of scopes, pressure-controlling is 10
-1～10
6Kg/m
2Carry out hot-pressing processing in the scope, its temperature is preferably about 600 ℃, pressure about 5 * 10
5Kg/m
2, along carbon nanotube axially or radially hot-pressing processing ceramic powder and carbon nano pipe array 15 about one hour.Remove substrate 11 and substrate 12, get a ceramic unit 20, as shown in Figure 4.This ceramic unit 20 has excellent heat-insulating property in the horizontal direction, has perfect heat conductivility in vertical direction.
At last, form ceramic bulk material 30.
The above-mentioned ceramic unit that makes 20 thickness are less, and real life or produce required ceramic product as the stupalith of adiabatic refractory brick or high heat conduction, needs with a plurality of ceramic unit 20 be combined under certain condition, as shown in Figure 5.Specifically in conjunction with the time each ceramic unit 20 to be piled up along heat conduction direction or adiabatic direction, the heat conduction direction of its each ceramic unit 20 or adiabatic direction are all consistent; Controlled temperature is 800～1800 ℃, is preferably more than 1000 ℃, and pressure is 10
4～10
6Kg/m
2, hot pressed sintering one hour even tens of hours is made ceramic bulk material 30, as shown in Figure 6, specifically makes the time selected according to the stupalith that will make.
As shown in Figure 6, the stupalith of present embodiment manufacturing is a ceramic bulk material 30, and it comprises a ceramic matrix 16, i.e. the mixture of ceramic powder and coupler, and this ceramic powder comprises SiC, ZnO, ZrO
2Deng; A lot of carbon nano pipe arrays 15 are distributed in this ceramic matrix 16.
This ceramic bulk material 30, carbon nano pipe array 15 is through the fixed formation one of the mixture of ceramic powder and coupler, carbon nano pipe array 15 is vertical, uniform distribution in stupalith, form a lot of passages of heat, formed ceramic bulk material 30 in vertical direction, be carbon nanotube axially on have high thermal conductivity, and heat conduction is even; Simultaneously, in the horizontal direction, promptly the footpath of carbon nanotube upwards has high insulating characteristics again.Therefore, this stupalith has heat conduction and heat-proof quality simultaneously, is a multifunctional ceramic material.
Present embodiment is an example to make ceramic bulk material only, illustrates that this has the manufacturing processed of various heat transfer property energy stupalith.Ceramic product for needed different shapes, structure in actual production or the life can change substrate 11 and substrate 12 into default mould, just can obtain the ceramic product of desired shape, structure.
Be distributed with the carbon nanotube that is parallel to each other in the stupalith of the technical program,, make this stupalith on carbon nanotube is axial, form a lot of passages of heat, have the excellent heat conducting performance because carbon nanotube has the one-way heat conduction performance; Simultaneously CNT (carbon nano-tube) directly upwards this stupalith have excellent heat-insulating property.Therefore, this stupalith has heat conductivility and heat-proof quality simultaneously, is a multifunctional ceramic material.
Claims (15)
1. stupalith, this stupalith comprise a ceramic matrix and are distributed in carbon nanotube in this ceramic matrix; It is characterized in that this carbon nanotube is an array structure, is arranged in parallel along same direction in this ceramic matrix.
2. stupalith as claimed in claim 1 is characterized in that this ceramic matrix comprises ceramic powder and coupler.
3. stupalith as claimed in claim 1 is characterized in that, this stupalith has high thermal conductivity on carbon nanotube is axial, simultaneously, directly upwards have high thermal insulation at carbon nanotube.
4. the manufacture method of a stupalith, it may further comprise the steps:
One carbon nano pipe array is provided;
Between this carbon nanotube, fill ceramic matrix;
The carbon nano pipe array that is filled with ceramic matrix is carried out hot-pressing processing, form stupalith.
5. the manufacture method of stupalith as claimed in claim 4 is characterized in that, this pottery comprises ceramic powder and coupler substantially.
6. the manufacture method of stupalith as claimed in claim 4 is characterized in that, this hot-pressing processing is axially carried out along carbon nanotube.
7. the manufacture method of stupalith as claimed in claim 4 is characterized in that, this hot-pressing processing is radially carried out along carbon nanotube.
8. the manufacture method of stupalith as claimed in claim 4 is characterized in that, the temperature of this hot-pressing processing is 500～700 ℃.
9. the manufacture method of stupalith as claimed in claim 4 is characterized in that, the pressure of this hot-pressing processing is 10
4～10
6Kg/m
2
10. the manufacture method of stupalith as claimed in claim 4 is characterized in that, the time of this hot-pressing processing is one hour to four hours.
11. the manufacture method of stupalith as claimed in claim 4, it further comprises step:
Get the stupalith that a plurality of hot-pressing processing form, axially pile up along carbon nanotube;
It is carried out hot pressed sintering handles.
12. the manufacture method of stupalith as claimed in claim 4, it further comprises step:
Get the stupalith that a plurality of hot-pressing processing form, radially stacked along carbon nanotube;
It is carried out hot pressed sintering handles.
13. the manufacture method as claim 11 or 12 described stupaliths is characterized in that, this hot pressed sintering treatment temp is 800～1800 ℃.
14. the manufacture method as claim 11 or 12 described stupaliths is characterized in that, the pressure that this hot pressed sintering is handled is 10
4～10
6Kg/m
2
15. the manufacture method as claim 11 or 12 described stupaliths is characterized in that, this hot pressed sintering treatment time is one hour to tens of hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100338593A CN100436367C (en) | 2005-03-25 | 2005-03-25 | Ceramic material and process for preparing same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100338593A CN100436367C (en) | 2005-03-25 | 2005-03-25 | Ceramic material and process for preparing same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1837133A CN1837133A (en) | 2006-09-27 |
| CN100436367C true CN100436367C (en) | 2008-11-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100338593A Expired - Fee Related CN100436367C (en) | 2005-03-25 | 2005-03-25 | Ceramic material and process for preparing same |
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| CN115772038A (en) * | 2022-11-29 | 2023-03-10 | 湖北冠毓新材料科技有限公司 | Preparation method of oriented carbon nanotube modified ceramic material |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010029706A1 (en) * | 2000-04-11 | 2001-10-18 | Risser Keith B. | Fire retardant deck waterproof system |
| CN1501483A (en) * | 2002-11-14 | 2004-06-02 | 清华大学 | A thermal interfacial material and method for manufacturing same |
| CN1514684A (en) * | 2003-06-27 | 2004-07-21 | 中国科学院上海硅酸盐研究所 | Carbon nano-pipe/ceramic composite material possessing microwave absorption function and its preparation method |
| WO2004096725A2 (en) * | 2003-04-28 | 2004-11-11 | Leandro Balzano | Single-walled carbon nanotube-ceramic composites and methods of use |
-
2005
- 2005-03-25 CN CNB2005100338593A patent/CN100436367C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010029706A1 (en) * | 2000-04-11 | 2001-10-18 | Risser Keith B. | Fire retardant deck waterproof system |
| CN1501483A (en) * | 2002-11-14 | 2004-06-02 | 清华大学 | A thermal interfacial material and method for manufacturing same |
| WO2004096725A2 (en) * | 2003-04-28 | 2004-11-11 | Leandro Balzano | Single-walled carbon nanotube-ceramic composites and methods of use |
| CN1514684A (en) * | 2003-06-27 | 2004-07-21 | 中国科学院上海硅酸盐研究所 | Carbon nano-pipe/ceramic composite material possessing microwave absorption function and its preparation method |
Non-Patent Citations (1)
| Title |
|---|
| 碳纳米管的力学性能及碳纳米管复合材料研究. 辜萍，王宇，李广海.力学进展，第32卷第4期. 2002 * |
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| CN1837133A (en) | 2006-09-27 |
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