CN104177127A - Nano graphite electrode - Google Patents
Nano graphite electrode Download PDFInfo
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- CN104177127A CN104177127A CN201410391904.1A CN201410391904A CN104177127A CN 104177127 A CN104177127 A CN 104177127A CN 201410391904 A CN201410391904 A CN 201410391904A CN 104177127 A CN104177127 A CN 104177127A
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Abstract
The invention discloses a nano graphite electrode which is composed of a solid graphite rod matrix and a non-metallic anti-oxidation layer, wherein the non-metallic anti-oxidation layer is arranged at the periphery of the matrix. The nano graphite electrode is characterized in that the structure components of the nano graphite electrode from inside to outside sequentially include a nano ceramic particles containing graphite rod with the thickness of 10-100 nm, a first silicon carbide (SiC) layer with the thickness of 0.1-1 nm, graphene, and a second silicon carbide (SiC) layer with the thickness of 100-1000 nm. The adjusting resistance of the graphite rod is 0.5-5%, the diameter of the graphite rod is 5-200 mm, the graphite rod is composed of nano ceramic particles and graphite particles, the diameter of the graphite particles is less than or equal to 3 microns, and the weight fraction is 90-95%. The nano ceramic particles can be one or more of silicon carbide (SiC), hafnium carbide (HfC), tantalum carbide (TaC), zirconium carbide (ZrC) and are scattered in the graphite matrix, and the weight fraction is 5-10%. The graphite electrode is compact in structure and high in strength, and has excellent oxidation resistance and high emission performance.
Description
Technical field
The present invention relates to Graphite Electrodes technical field, particularly relate to a kind of nano-graphite electrode.
Background technology
Graphite has high specific strength and rigidity, good conduction, thermal conductivity and heat-shock resistance, and lasting features such as high strength under high temperature, be important electro-conductive material and the structured material that the departments such as metallurgy, electronics, nuclear power industry and aerospace industry use, especially in high-temperature applications, day by day demonstrate its importance.Along with the rising (to 2500 ℃) of use temperature, its strength decreased, its high strength and chemical stability only could keep under inert atmosphere, because in air more than 400 ℃, will there is oxidizing reaction in it, thereby limited its application.
Graphite Electrodes is a kind of being widely used as smelting various steel alloys, iron alloy, the Industrial materials of industrial silicon and yellow phosphorus and non-ferrous metal and rare metal, its weak point is that high-temperature oxidation resistance is poor, in steelmaking process, LF stove and electric arc furnace are with 40%～60% of Graphite Electrodes, because react and consume in vain with airborne oxygen, Graphite Electrodes itself is also a kind of Nonrenewable resources, more than only graphitization process electric energy just need to consume 3500kwh, the required needle coke of the Graphite Electrodes of production high-performance is simultaneously by Japan, the developed countries such as America and Europe monopolize for a long time, hold at high price.Therefore when not affecting emitting performance, the Graphite Electrodes of development oxidation-resistance is for the life-span that extends Graphite Electrodes, and the energy consumption and the production cost that reduce steel industry are most important.
Granted publication number for the Chinese utility model patent of CN203057583U has proposed a kind of Graphite Electrodes, comprises the oxidation resistant coating of Graphite Electrodes body, Graphite Electrodes body surface and the metal level of anti oxidation layer outside surface.This Graphite Electrodes efficiently solves the problem that electrode lateral oxidation that in prior art, Graphite Electrodes occurs in smelting process causes Graphite Electrodes severe attrition, but there is the not firm problem of combination between metal level, dope layer and Graphite Electrodes matrix, the easy spalling failure of anti oxidation layer, and the emission efficiency of electrode is not high.
Application publication number is that the Chinese invention patent of CN103260282A relates to a kind of enhancement type composite graphite electrode and making and use method thereof, and wherein electrode shell includes carbon fiber, so the ultimate compression strength of shell is doubled, not because thermal stresses cracks.This invention utilizes the surperficial surface action of Ampereconductors, and electrodes conduct performance is good, can reduce energy consumption, but this electrode only has simple electrode shell protection, and inner Graphite Electrodes is still easily oxidation at high temperature, and loss is larger.
Graphite is rare has larger specific surface (2630m
2/ g
-1), its thickness is only 0.35nm, has good electricity, mechanics, optics and thermal property, is a kind of very potential energy storage material.Its good electroconductibility is the very inaccessible peculiar property of other high specific surface Carbon Materials, means that Graphene can be the splendid electrode materials of performance; And good calorifics, optics and mechanical strength, also indicating that grapheme material can be used for ultra-thin, miniature electrode materials and energy storage device, Graphene after the employing chemical modifications such as Stoller was as the electrode materials of ultracapacitor and carried out correlative study, and its result was published in " Nano Letters 8 (10): 3498-3502 " with " Graphene-based ultracapacitors " in 2008.
Summary of the invention
This project aims to provide a kind of nano-graphite electrode, can effectively overcome the poor defect of emitting performance after the oxidizable and antioxidation treatment of conventional graphite electrode high temperature.
Nano-graphite electrode of the present invention is cylindric, nonmetal anti oxidation layer by solid graphite rod matrix and matrix periphery forms, it is characterized in that constituent is from inside to outside followed successively by graphite rod, the first layer silicon carbide (SiC), Graphene and the second layer silicon carbide (SiC) that contains nano-ceramic particle, has molecule or interatomic bond closely between heterogeneity.
The regulating resistance of described graphite rod is 0.5～5%, and diameter is 5～200mm, nano-ceramic particle and graphite granule, consists of, and wherein graphite granule diameter is less than or equal to 3 microns, and weight fraction is 90～95%.
Described nano-ceramic particle composition is silicon carbide, hafnium carbide, tantalum carbide, zirconium carbide, and disperse is distributed in graphite matrix, and weight fraction is 5～10%.
The thickness of described the first layer SiC is 10～100nm, is evenly distributed on graphite rod matrix peripheral.
Described Graphene thickness is 0.01～10nm.
Described second layer SiC is distributed in electrode outermost, and thickness is 100～1000nm.
Major advantage of the present invention is: 1. the disperse of different-grain diameter (micron order and nano level) particle distributes and to make organizing of electrode very fine and close with coordinating, and physical strength is high, steady quality; 2. Graphene, silicon carbide and graphite matrix organic assembling, this nano-graphite electrode has good antioxidant property and high emission performance; 3. good conductivity, wear-resisting, high temperature resistant.
Accompanying drawing explanation
Fig. 1 is a kind of schematic cross-section of nano-graphite electrode.
In figure, 10 is the graphite rod that contains nano-ceramic particle; 20 is the first layer SiC; 30 is the first layer SiC; 40 is Graphene; 50 is nano-ceramic particle.
Embodiment
Below in conjunction with specific embodiment, further illustrate the present invention, should understand these embodiment is only not used in and limits the scope of the invention for the present invention is described, after having read the present invention, those skilled in the art all fall within the application's claims to the modification of the various equivalent form of values of the present invention and limit.
Embodiment 1
A nano-graphite electrode, is cylindric, solid graphite rod and nonmetal anti oxidation layer, consists of.Wherein, the diameter of graphite rod is 5mm, the TaC granulometric composition of the graphite granule of the micron level by 95% and 5% Nano grade, and regulating resistance is 0.5%, and the diameter of graphite granule 1～3 micron not etc., the diameter of TaC particle be 100～300 nanometers not etc.Nonmetal anti oxidation layer comprises the first layer silicon carbide, Graphene and second layer silicon carbide, has molecule or interatomic bond closely between heterogeneity, and thickness is respectively 10nm, 0.1nm and 100nm.This graphite electrode structure is fine and close, and intensity is high, has good antioxidant property and high emission performance.
Embodiment 2
A nano-graphite electrode, is cylindric, solid graphite rod and nonmetal anti oxidation layer, consists of.Wherein, the diameter of graphite rod is 100mm, the hafnium carbide granulometric composition of the graphite granule of the micron level by 93% and 7% Nano grade, and regulating resistance is 3%, and the diameter of graphite granule is between 1～2 micron, the diameter of hafnium carbide particle be 10～100 nanometers not etc.Nonmetal anti oxidation layer comprises the first layer silicon carbide, Graphene and second layer silicon carbide, has molecule or interatomic bond closely between heterogeneity, and thickness is respectively 40nm, 0.5nm and 600nm.This graphite electrode structure is fine and close, and intensity is high, has good antioxidant property and high emission performance.
Embodiment 3
A nano-graphite electrode, is cylindric, solid graphite rod and nonmetal anti oxidation layer, consists of.Wherein, the diameter of graphite rod is 200mm, the silicon-carbide particle of the graphite granule of the micron level by 90% and 5% Nano grade, 5% zirconium carbide particle form, regulating resistance is 5%, and the diameter of graphite granule is between 2～3 microns, the diameter of silicon carbide, zirconium carbide particle be 50～200 nanometers not etc.Nonmetal anti oxidation layer comprises the first layer silicon carbide, Graphene and second layer silicon carbide, has molecule or interatomic bond closely between heterogeneity, and thickness is respectively 100nm, 1nm and 1000nm.This graphite electrode structure is fine and close, and intensity is high, has good antioxidant property and high emission performance.
Above are only three embodiments of the present invention, but design concept of the present invention is not limited to this, allly utilizes this design to carry out the change of unsubstantiality to the present invention, all should belong to the behavior of invading the scope of protection of the invention.In every case be the content that does not depart from technical solution of the present invention, any type of simple modification, equivalent variations and the remodeling above embodiment done according to technical spirit of the present invention, still belong to the protection domain of technical solution of the present invention.
Claims (6)
1. a nano-graphite electrode, nonmetal anti oxidation layer by solid graphite rod matrix and matrix periphery forms, it is characterized in that constituent is from inside to outside followed successively by graphite rod, the first layer silicon carbide, Graphene and the second layer silicon carbide that contains nano-ceramic particle, has molecule or interatomic bond closely between heterogeneity.
2. nano-graphite electrode according to claim 1, the regulating resistance that it is characterized in that described graphite rod is 0.5～5%, and diameter is 5～200mm, nano-ceramic particle and graphite granule, consists of, wherein graphite granule diameter is less than or equal to 3 microns, and weight fraction is 90～95%.
3. nano-graphite electrode according to claim 1, is characterized in that described nano-ceramic particle composition is silicon carbide, hafnium carbide, tantalum carbide, zirconium carbide, and disperse is distributed in graphite matrix, and weight fraction is 5～10%.
4. nano-graphite electrode according to claim 1, is characterized in that the thickness of described the first layer silicon carbide is 10～100nm, is evenly distributed on graphite rod matrix peripheral.
5. nano-graphite electrode according to claim 1, is characterized in that described Graphene thickness is 0.01～10nm.
6. nano-graphite electrode according to claim 1, is characterized in that described second layer silicon carbide is distributed in electrode outermost, and thickness is 100～1000nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410391904.1A CN104177127A (en) | 2014-08-08 | 2014-08-08 | Nano graphite electrode |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410391904.1A CN104177127A (en) | 2014-08-08 | 2014-08-08 | Nano graphite electrode |
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| CN104177127A true CN104177127A (en) | 2014-12-03 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106802314A (en) * | 2017-03-20 | 2017-06-06 | 山东理工大学 | A kind of preparation method and application of the immunosensor of the Graphene based on load TaC and gold cladding decahedron Nano silver grain |
| CN110668837A (en) * | 2019-10-29 | 2020-01-10 | 大同通扬碳素有限公司 | Preparation method of low-loss graphite electrode |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3964924A (en) * | 1975-07-11 | 1976-06-22 | Pfizer Inc. | Protective coating for graphite electrodes |
| JPS58167415A (en) * | 1982-03-30 | 1983-10-03 | Tokyo Yogyo Co Ltd | Preparation of graphitic electrode |
| CN102277560A (en) * | 2011-08-23 | 2011-12-14 | 南京理工大学 | Method for improving oxidation resistance of graphite electrode by obtaining SiC/C gradient surface coating through chemical vapor deposition |
| CN102497689A (en) * | 2011-12-02 | 2012-06-13 | 南京理工大学 | Method for improving antioxidation performance of graphite electrode with surface modification |
-
2014
- 2014-08-08 CN CN201410391904.1A patent/CN104177127A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3964924A (en) * | 1975-07-11 | 1976-06-22 | Pfizer Inc. | Protective coating for graphite electrodes |
| JPS58167415A (en) * | 1982-03-30 | 1983-10-03 | Tokyo Yogyo Co Ltd | Preparation of graphitic electrode |
| CN102277560A (en) * | 2011-08-23 | 2011-12-14 | 南京理工大学 | Method for improving oxidation resistance of graphite electrode by obtaining SiC/C gradient surface coating through chemical vapor deposition |
| CN102497689A (en) * | 2011-12-02 | 2012-06-13 | 南京理工大学 | Method for improving antioxidation performance of graphite electrode with surface modification |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106802314A (en) * | 2017-03-20 | 2017-06-06 | 山东理工大学 | A kind of preparation method and application of the immunosensor of the Graphene based on load TaC and gold cladding decahedron Nano silver grain |
| CN110668837A (en) * | 2019-10-29 | 2020-01-10 | 大同通扬碳素有限公司 | Preparation method of low-loss graphite electrode |
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Application publication date: 20141203 |