CN102259876A - Preparation method of calcium silicate friction material - Google Patents
Preparation method of calcium silicate friction material Download PDFInfo
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- CN102259876A CN102259876A CN2010101859885A CN201010185988A CN102259876A CN 102259876 A CN102259876 A CN 102259876A CN 2010101859885 A CN2010101859885 A CN 2010101859885A CN 201010185988 A CN201010185988 A CN 201010185988A CN 102259876 A CN102259876 A CN 102259876A
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Abstract
The invention relates to a synthesis of an environment-friendly quieter material calcium silicate, which belongs to the inorganic non-metallic material field, and especially relates to a preparation method of environment-friendly quieter friction material. The method comprises the following steps: uniformly mixing an activated calcium source, deionized water and an active silica raw material, adding a mineralizer in an uniformly mixed slurry, conveying the product into a high pressure reaction vessel for performing a hydro-thermal reaction, filtering the obtained product after reaction, drying to obtain the calcium silicate material. The porous spherical calcium silicate material prepared by the method of the invention has characteristics of heatproof, noise reduction, environmental protection and the like.
Description
Technical field
The invention belongs to field of inorganic nonmetallic material, relate in particular to a kind of environmental protection sound deadening method for preparing friction.
Technical background
In recent years, the application development of xonotlite type calcium silicate material is very fast, and major cause is to compare with other inorganic thermal insulation materials, xonotlite type calcium silicate material has a lot of good characteristics, as light weight, and fire prevention, high temperature resistant, sound isolating and heat insulating performance is good, intensity height, dimensional stabilizing, good decorative property, raw material is extensive, and processing units is simple, and energy expenditure is low etc.
Along with the development of communications with to the attention of environment protection; requirement to friction materials is more and more higher; not only require the feature of environmental protection; also require brake stability, comfortableness, security and noiselessness etc.; National Quality Supervision Bureau General announces " on October 1st, 2003 rose and bans use of the asbestos material "; contain the automobile brake sheet limit production and the use of asbestos, the high-quality friction material, the manufacturing non-asbestos brake block that quicken research and development and production environment-friendly type are extremely urgent.
Current solution is to be used in combination the combination of concentrating formula materials, and porous spherical silicate is exactly one of them.
Japan is ultralight calcium silicate material output maximum, the state-of-the-art country of technology in the world, and density is at 110kg/m
3Stay anti-xonotlite type calcium silicate products to can manufacture.Aspect the research of xonotlite type Calucium Silicate powder, China is one of most active country in the world, China can production density at 170-260kg/m
3Xonotlite type calcium silicate insulation, density is at 130kg/m
3Following ultralight product is manufactured experimently at present.
Employing is by a process for preparing next porous spherical calcium silicate material, crystal water content is minimum in all hydrated calcium silicate mineral, temperature tolerance is best for it, use temperature can reach 1000 ℃, have good characteristics such as high temperature resistant, low density, and ca silicate fibre is absorbed by body fluid easily, therefore, its to the toxicity of human body not only far below fibrous magnesium silicate, also be starkly lower than general aluminum silicate fiber, so be very safe in the use, being greatly developed by countries in the world in recent years, is a kind of high-grade friction materials to the human body close friend of environmental protection.
Summary of the invention
The purpose of this invention is to provide a kind of optimization synthetic method of environmental protection sound deadening friction materials Calucium Silicate powder, this method steps is as follows:
(1) with the Calcium of intensifiens source, deionized water, the active silica raw material mixes;
(2) add mineralizer in the slurry after mixing;
(3) product in (2) is transferred in the autoclave;
(4) in reactor, carry out hydro-thermal reaction;
(5) product that obtains filters after the reaction, dry calcium silicate material.
Wherein, described Calcium of intensifiens source is active hydrogen calcium oxide or active calcium oxide; Described silicon-dioxide is highly active Powdered silicon-dioxide, and its particle diameter is at the 1-10 micron; Described additive is a zirconium oxychloride, strontium nitrate, manganous acetate, sodium hydroxide, one or more in the potassium hydroxide.
The mol ratio of Ca2+ and silicon-dioxide is at 0.95-1.05 in the described step (1): 1.
The mol ratio of mineralizer and silicon-dioxide is 1-10 in the described step (2): 100.
The temperature of hydro-thermal reaction is between the 200-230 degree in the described step (3), and the time of hydro-thermal reaction is 5-12 hour; Water-solid ratio is between 20-40 in the building-up process.
When utilizing dynamic Hydrothermal Preparation Calucium Silicate powder, the pairing processing condition of different siliceous raw materials have bigger difference.The selection of calcareous raw material is also very important, should guarantee enough purity, and certain activity is arranged again.Water-solid ratio is the quality and the contained (CaO+SiO of solid of water in the preceding slip of reaction
2) ratio of total mass.Water-solid ratio is too small, is unfavorable for SiO
2Dissolving, cause slip feeding-up in the reaction process, what be unfavorable for reacting normally carries out, thereby is difficult to form spherical agglomerates.Water-solid ratio is big, helps the raising of reaction efficiency, but the excessive production efficiency that reduces material of water-solid ratio, the spherical agglomerated body structure of the Calucium Silicate powder of Sheng Chenging is comparatively loose simultaneously.Therefore, select suitable water-solid ratio also extremely important.Stirring velocity has considerable influence to the pattern of Calucium Silicate powder offspring crystal grain, and speed improves, and crystal size reduces; Stirring velocity has certain influence to hydro-thermal reaction speed, thereby the content that makes product difference to some extent.During preparation Calucium Silicate powder ultralight goods, stirring velocity is the factor that must investigate.
Employing is remarkable by a process for preparing the porous spherical calcium silicate material that the comes material advantage that creates friction, because the porous spherical Calucium Silicate powder can make friction materials density lower under the prerequisite that guarantees mechanical property; Can increase the stability of Young's modulus data under low temperature and hot conditions; Can increase when being used for the flexible friction product and being connected of rubber counterdie, improve product bend resistance intensity; Double metal formulations can obviously increase the mean radius of pore; The increase of connective pore can improve perviousness, makes gas easier dissipation on frictional contact surface, thereby obviously increases frictional coefficient; Can guarantee the stability of the frictional behaviour under the temperature variations, make friction materials can not cause braking effect to weaken because of being heated; Have noise abatement noise reduction good result, guarantee the brake comfort level; And do not contain harmful chemical ingredients, be environmentally friendly machine.
Embodiment
The present invention is further described below in conjunction with embodiment, but to the present invention without limits.
[embodiment 1]
In the 5L deionized water, add 1.0mol active hydrogen calcium oxide and 1.0mol active silica, add the zirconium oxychloride of 0.07mol simultaneously.Mixture is stirred, be transferred in the autoclave.Under continuous stirring condition, with reactor temperature programming to 200 ℃, under 200 ℃ of conditions, be incubated 6h in the 120min.Stop heating then, naturally cool to room temperature.Product is through suction filtration, and oven dry obtains the porous spherical Calucium Silicate powder.
[embodiment 2]
The new system active calcium oxide is cleared up in deionized water, after slip is stirred, added mol ratio Ca: Si=1: 1 silica powder, the weight ratio water: Gu=1: 20 deionized water, mol ratio Zr
4+/ (Ca
2++ Si
4+The zirconium oxychloride of)=3%.The material that stirs will be placed autoclave, and heat-up rate is 0.5 ℃/min, temperature rise period stirring velocity 450rad/min, and holding temperature is 230 ℃, holding stage stirring velocity 150rad/min, insulation 8h.Behind the 8h, powered-down naturally cools to room temperature, takes out material and incites somebody to action, and oven dry obtains the porous spherical Calucium Silicate powder.
Claims (8)
1. environmental protection sound deadening material Calucium Silicate powder is synthetic, comprises the steps:
(1) with the Calcium of intensifiens source, deionized water, the active silica raw material mixes
(2) add mineralizer in the slurry after mixing
(3) product in (2) is transferred in the autoclave
(4) in reactor, carry out hydro-thermal reaction
(5) product that obtains filters after the reaction, dry calcium silicate material.
2. as right 1 described preparation method, it is characterized in that the calcium hydroxide of selecting for use is active hydrogen calcium oxide or active calcium oxide.
3. as right 1 described preparation method, it is characterized in that the silicon-dioxide of selecting for use is highly active Powdered silicon-dioxide, its particle diameter is at the 1-10 micron.
4. preparation method as claimed in claim 1 is characterized in that, described additive is a strontium nitrate, manganous acetate, sodium hydroxide, potassium hydroxide, one or more in the zirconium oxychloride.
5. as claim 1,2,3,4 described methods is characterized in that, the mol ratio of calcium hydroxide and silicon-dioxide is at 0.95-1: 1
6. as claim 1,2,3,4,5 described preparation methods is characterized in that, the mol ratio of mineralizer and silicon-dioxide is 1-10: 100
7. the method for claim 1 is characterized in that, the temperature of hydro-thermal reaction is between the 200-230 degree, and the time of hydro-thermal reaction is 5-12 hour.
8. the method for claim 1 is characterized in that, water-solid ratio is between 20-40 in the building-up process.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101859885A CN102259876A (en) | 2010-05-28 | 2010-05-28 | Preparation method of calcium silicate friction material |
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| CN2010101859885A CN102259876A (en) | 2010-05-28 | 2010-05-28 | Preparation method of calcium silicate friction material |
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| CN102259876A true CN102259876A (en) | 2011-11-30 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104045090A (en) * | 2014-06-05 | 2014-09-17 | 嵊州市求是节能材料有限公司 | Production process of ultralight high-temperature calcium silicate insulation product |
| CN104310415A (en) * | 2014-10-13 | 2015-01-28 | 杭州桑拉科技有限公司 | Preparation method of porous calcium silicate particles for friction materials |
| CN104402010A (en) * | 2014-11-06 | 2015-03-11 | 西南科技大学 | Preparation method of xonotlite-type calcium silicate material |
| CN105154008A (en) * | 2015-10-20 | 2015-12-16 | 晋江凯燕化工有限公司 | Copper-free friction material for driving/braking and product of copper-free friction material |
| CN104451883B (en) * | 2014-11-06 | 2017-03-01 | 西南科技大学 | A kind of preparation method of eakleite whisker |
| CN106838077A (en) * | 2015-12-04 | 2017-06-13 | 现代自动车株式会社 | L Water Paper friction material for vehicle and the vehicle part comprising it |
| CN107376018A (en) * | 2017-07-28 | 2017-11-24 | 深圳先进技术研究院 | A kind of biomaterial containing strontium and its preparation method and application |
| US9915331B2 (en) | 2016-01-15 | 2018-03-13 | Schaeffler Technologies AG & Co. KG | Wet friction materials including calcium silicate |
| US10132375B2 (en) | 2016-05-18 | 2018-11-20 | Schaeffler Technologies AG & Co. KG | Wet friction materials having friction modifier carrier |
| CN109482135A (en) * | 2018-11-06 | 2019-03-19 | 广东海洋大学 | A kind of preparation method and application of calcium silicates adsorbent material |
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| US3861935A (en) * | 1969-03-12 | 1975-01-21 | Walter Ohnemuller | Synthetic crystalline beta-wallastonite product |
| GB1272115A (en) * | 1969-04-10 | 1972-04-26 | Rheinische Kalksteinwerke | Process for the production of calcium hydrosilicates |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104045090A (en) * | 2014-06-05 | 2014-09-17 | 嵊州市求是节能材料有限公司 | Production process of ultralight high-temperature calcium silicate insulation product |
| CN104310415A (en) * | 2014-10-13 | 2015-01-28 | 杭州桑拉科技有限公司 | Preparation method of porous calcium silicate particles for friction materials |
| CN104310415B (en) * | 2014-10-13 | 2016-06-22 | 杭州桑拉科技有限公司 | A kind of preparation method of the porous calcium silicate granule of friction resistance material |
| CN104402010A (en) * | 2014-11-06 | 2015-03-11 | 西南科技大学 | Preparation method of xonotlite-type calcium silicate material |
| CN104451883B (en) * | 2014-11-06 | 2017-03-01 | 西南科技大学 | A kind of preparation method of eakleite whisker |
| CN105154008A (en) * | 2015-10-20 | 2015-12-16 | 晋江凯燕化工有限公司 | Copper-free friction material for driving/braking and product of copper-free friction material |
| CN106838077A (en) * | 2015-12-04 | 2017-06-13 | 现代自动车株式会社 | L Water Paper friction material for vehicle and the vehicle part comprising it |
| CN106838077B (en) * | 2015-12-04 | 2020-05-19 | 现代自动车株式会社 | Wet paper friction material for vehicle and vehicle component comprising same |
| US9915331B2 (en) | 2016-01-15 | 2018-03-13 | Schaeffler Technologies AG & Co. KG | Wet friction materials including calcium silicate |
| US10132375B2 (en) | 2016-05-18 | 2018-11-20 | Schaeffler Technologies AG & Co. KG | Wet friction materials having friction modifier carrier |
| CN107376018A (en) * | 2017-07-28 | 2017-11-24 | 深圳先进技术研究院 | A kind of biomaterial containing strontium and its preparation method and application |
| CN109482135A (en) * | 2018-11-06 | 2019-03-19 | 广东海洋大学 | A kind of preparation method and application of calcium silicates adsorbent material |
| CN109482135B (en) * | 2018-11-06 | 2022-02-22 | 广东海洋大学 | Preparation method and application of calcium silicate adsorption material |
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Application publication date: 20111130 |