CN104386669A - High-rebound-elasticity porous graphite material and preparation method thereof - Google Patents
High-rebound-elasticity porous graphite material and preparation method thereof Download PDFInfo
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- CN104386669A CN104386669A CN201410161923.5A CN201410161923A CN104386669A CN 104386669 A CN104386669 A CN 104386669A CN 201410161923 A CN201410161923 A CN 201410161923A CN 104386669 A CN104386669 A CN 104386669A
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Abstract
The invention relates to a high-rebound-elasticity porous graphite material and a preparation method thereof, and belongs to the technical field of materials, and especially belongs to the technical field of carbon materials. The high-rebound-elasticity porous graphite material is obtained by milling petroleum coke and pitch coke into a powder with ultrafine fineness, stirring in a mixing kneading pot, adding a pitch binder and a pore forming agent, rolling, briquetting, graphitizing, crushing, screening and milling. The high-rebound-elasticity porous graphite material has a large amount of micropores and has the characteristics of being capable of rebounding after being compressed under a certain pressure. The high-rebound-elasticity porous graphite possesses the lubricating effect of graphite when being applied to a friction material, also possesses a large amount of pores variable along with pressure variation and helps to improve the compression rate of the friction material, thereby enabling the friction material to possess elasticity and optimizing the inherent shaking frequency of the friction material. When a locomotive is braked, the pores are capable of absorbing shock waves and a gas-liquid mixture and enabling the friction material and a counterpart to be in soft contact without generating resonance when braking is performed, thereby realizing the purpose of eliminating braking sound.
Description
Technical field
The present invention relates to a kind of high resilience porous graphite material and preparation method thereof, belong to field of material technology, especially belong to carbon material technical field.
Background technology
Friction materials is widely used in the brake material in the stopper of various transport facility (as automobile, train, aircraft, naval vessel etc.) and various machinery equipment, clutch coupling and friction gear.In drift stop, utilize the frictional behaviour of friction materials, be heat energy and other forms of energy by the kinetic transformation of rotation, thus transmission mechanism is braked.The requirement of modern society to Environment protection and safety is more and more higher, and the semipermanent mold friction materials of the non-asbestos that released one after another, sintered gold genotype friction materials, substitute fibre strengthen or polymer bonding friction materials, composite fiber friction material, ceramic fiber friction materials etc.In order to regulate and improve goods frictional behaviour, with the addition of some fillers, graphite is as a kind of anti-attrition filler, utilize the excellent properties of graphite own, reduce the wearing and tearing of self and mating plate, improve thermal conductivity, improve friction stationarity and block resistance, reduction brake oil and chattering, goods are easy to the characteristics such as processing.Graphite, as the more conventional product of carbon material, cuts with refinery coke or pitch coke high temperature graphitization or some Graphite Electrodess and broken etc. just can to obtain.Summary of the invention
The object of the present invention is to provide a kind of high resilience porous graphite material and preparation method thereof.Be the powder becoming granularity superfine with pitch coke grinding by refinery coke, stir in kneading pot, add pitch caking agent and pore-forming material simultaneously, roll and briquetting, greying, fragmentation, screening and abrasive dust obtain.
Technical scheme of the present invention is:
A kind of high resilience porous graphite material and preparation method thereof, comprises the steps:
1) the producing of powder: choose pulverizing mill dedusting powder or graphite cathode material production line nodularization clout;
2) kneading: take powder and add kneading pot and be dry mixed 10-20min, temperature 60-90 DEG C, add caking agent, wet mixing 5-10min, temperature 70-100 DEG C, finally add pore-forming material and be incubated kneading 30-50min again, take the dish out of the pot;
3) to roll and briquetting: the hot thickener that will take the dish out of the pot rolls 1-3 time repeatedly, sends into briquetting press while hot, be pressed into compacting body or cooling abrasive dust is molded into block again;
4) greying: block material is sent into graphitizing furnace, high temperature graphitization between temperature 2700-3200 DEG C;
5) broken, sieve is expected and abrasive dust: complete the fragmentation of graphited ball material, screening or abrasive dust.
Further, in step 1), powder mean particle size is at about 4 μm, is spherically advisable.
Further, step 2) in caking agent be mid-temperature pitch, add-on is the 30-40% of gross weight, and add-on stirs agglomerating being advisable with thickener; Pore-forming material can be polyoxyethylene glycol, polyvinyl alcohol, stearic acid etc., meet low-temperature curing, middle temperature melted, vaporization at high temperature or carbon left less and be the feature of easy graphitized charcoal, add-on, with 10 ± 5% of caking agent add-on, suitably can regulate according to caking agent carbon yield.
Further, telling the closely knit molding device of thickener in step 3) can be any molding device.
The invention has the beneficial effects as follows, select approximate sphericity ultrafine powder, there is higher specific surface area, easily form particle packing hole, under the effect of caking agent, and add a certain proportion of pore-forming material, be pressed into blocks, under high temperature graphitization state, a large amount of caking agent volatile matter and pore-forming material volatilization, residual charcoal and particle compact siro spinning technology, define a large amount of micropore, and compression can the graphite structure of resilience under a certain pressure.This high resilience porous graphite is used for the lubricant effect that friction materials possesses graphite, there is a large amount of hole simultaneously, hole can change with pressure size under a certain pressure, the rate of compression of friction materials is improved, thus makes friction materials possess elasticity, optimize the intrinsic vibration frequency of friction materials, during locomotive brake, hole Absorbable rod shock wave, gas-liquid mixture, make friction mildly can contact when braking with antithesis and not produce resonance, reach the object eliminating brake noise.
under concrete fabricating technology is:
1) the producing of powder: choose pulverizing mill dedusting powder or graphite cathode material production line nodularization clout, mean particle size, at about 4 μm, to be spherically advisable;
2) kneading: take powder and add kneading pot and be dry mixed 15min, temperature 80-85 DEG C, add that mid-temperature pitch accounts for gross weight 35%, wet mixing 10min, temperature 80-100 DEG C, finally add the 10% kneading 40min again that polyoxyethylene glycol accounts for pitch weight, thickener stirs agglomerating, takes the dish out of the pot;
3) to roll and briquetting: the hot thickener that will take the dish out of the pot rolls 2 times repeatedly, send into while hot and pinch ball machine, be pressed into closely knit spheroid;
4) greying: spherical material is loaded plumbago crucible, sends into graphitizing furnace, high temperature graphitization between temperature 2800-3200 DEG C;
5) broken, sieve material: complete the fragmentation of graphited ball material, screening or abrasive dust, be made into the finished product of different size granularity according to demand, pack packaging.
Above to one provided by the invention high resilience porous graphite material and preparation method thereof.Be described in detail; apply specific case herein to set forth the principle of invention and embodiment; the explanation of above embodiment just understands method of the present invention and core concept thereof for helping; should be understood that; for those skilled in the art; under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improve and modify and also fall in the protection domain of the claims in the present invention.
Claims (4)
1. one kind high resilience porous graphite material and preparation method thereof, comprises the steps:
Producing of powder: choose pulverizing mill dedusting powder or graphite cathode material production line nodularization clout;
Kneading: take powder and add kneading pot and be dry mixed 10-20min, temperature 60-85 DEG C, add caking agent, wet mixing 5-10min, temperature 70-100 DEG C, finally add pore-forming material kneading 30-50min again, take the dish out of the pot;
Roll and briquetting: the hot thickener that will take the dish out of the pot rolls 1-3 time repeatedly, sends into briquetting press while hot, be pressed into compacting body or cooling abrasive dust be molded into block again;
Greying: block material is sent into graphitizing furnace, high temperature graphitization between temperature 2700-3200 DEG C;
Broken, sieve material: complete the fragmentation of graphited ball material, screening or abrasive dust.
2. according to claim 1, in step 1), powder mean particle size is at about 4 μm, is spherically advisable.
3. according to claim 1, step 2) in caking agent be mid-temperature pitch, coking value 30-50%, add-on stirs agglomerating being advisable with thickener; Pore-forming material can be polyoxyethylene glycol, polyvinyl alcohol, stearic acid etc., meet low-temperature curing, middle temperature melted, vaporization at high temperature or carbon left less and be the feature of easy graphitized charcoal, add-on, with 10 ± 5% of caking agent add-on, suitably can regulate according to caking agent carbon yield.
4., according to claim 1, telling the closely knit molding device of thickener in step 3) can be any molding device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410161923.5A CN104386669A (en) | 2014-04-22 | 2014-04-22 | High-rebound-elasticity porous graphite material and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410161923.5A CN104386669A (en) | 2014-04-22 | 2014-04-22 | High-rebound-elasticity porous graphite material and preparation method thereof |
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| CN104386669A true CN104386669A (en) | 2015-03-04 |
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| CN201410161923.5A Pending CN104386669A (en) | 2014-04-22 | 2014-04-22 | High-rebound-elasticity porous graphite material and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106083047A (en) * | 2016-06-13 | 2016-11-09 | 天津锦美碳材科技发展有限公司 | A kind of for New Type of Carbon carbon composite making friction material and preparation method thereof |
| CN111628170A (en) * | 2020-04-23 | 2020-09-04 | 湖南中科星城石墨有限公司 | Porous secondary particle negative electrode material for lithium ion battery and preparation method thereof |
| CN113750895A (en) * | 2021-09-30 | 2021-12-07 | 云南中晟新材料有限责任公司 | Low-expansion artificial graphite preparation system and preparation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1887795A (en) * | 2006-07-26 | 2007-01-03 | 南阳博兴矿业有限责任公司 | Granular graphite for brake block and its prepn |
| CN102363526A (en) * | 2011-06-09 | 2012-02-29 | 中平能化集团开封炭素有限公司 | Ultra high power graphite electrode with its diameter being 650mm and production method thereof |
| CN102655128A (en) * | 2011-03-03 | 2012-09-05 | 硕恩科技股份有限公司 | Porous graphite radiator and preparation method of porous graphite |
| CN103274386A (en) * | 2013-05-24 | 2013-09-04 | 厦门大学 | Aperture-controllable porous electrode and preparation method thereof |
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2014
- 2014-04-22 CN CN201410161923.5A patent/CN104386669A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1887795A (en) * | 2006-07-26 | 2007-01-03 | 南阳博兴矿业有限责任公司 | Granular graphite for brake block and its prepn |
| CN102655128A (en) * | 2011-03-03 | 2012-09-05 | 硕恩科技股份有限公司 | Porous graphite radiator and preparation method of porous graphite |
| CN102363526A (en) * | 2011-06-09 | 2012-02-29 | 中平能化集团开封炭素有限公司 | Ultra high power graphite electrode with its diameter being 650mm and production method thereof |
| CN103274386A (en) * | 2013-05-24 | 2013-09-04 | 厦门大学 | Aperture-controllable porous electrode and preparation method thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106083047A (en) * | 2016-06-13 | 2016-11-09 | 天津锦美碳材科技发展有限公司 | A kind of for New Type of Carbon carbon composite making friction material and preparation method thereof |
| CN111628170A (en) * | 2020-04-23 | 2020-09-04 | 湖南中科星城石墨有限公司 | Porous secondary particle negative electrode material for lithium ion battery and preparation method thereof |
| CN111628170B (en) * | 2020-04-23 | 2023-10-17 | 湖南中科星城石墨有限公司 | Porous secondary particle anode material for lithium ion battery and preparation method thereof |
| CN113750895A (en) * | 2021-09-30 | 2021-12-07 | 云南中晟新材料有限责任公司 | Low-expansion artificial graphite preparation system and preparation method |
| CN113750895B (en) * | 2021-09-30 | 2023-12-29 | 云南中晟新材料有限责任公司 | Low-expansion artificial graphite preparation system and preparation method |
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Application publication date: 20150304 |