CN105084908A - Modifying method of potassium titanate fiber for carbon-based ceramic friction material - Google Patents
Modifying method of potassium titanate fiber for carbon-based ceramic friction material Download PDFInfo
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- CN105084908A CN105084908A CN201510547185.2A CN201510547185A CN105084908A CN 105084908 A CN105084908 A CN 105084908A CN 201510547185 A CN201510547185 A CN 201510547185A CN 105084908 A CN105084908 A CN 105084908A
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- potassium titanate
- titanate fiber
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Abstract
The invention relates to the technical field of raw material treatment of a carbon-based ceramic friction material, in particular to a modifying method of potassium titanate fiber for the carbon-based ceramic friction material. The modifying method comprises the following steps of pretreating the potassium titanate fiber by clarification limewater, using trench oil, vegetable oil and pine oil, and performing ultrasonic treatment, so as to enhance the activity of the potassium titanate fiber, and promote the activating degree of the potassium titanate fiber; adding a composite alkaline catalyst, supplementing titanium and potassium elements, adding pine oil and diesel oil, and performing ultrasonic treatment, so as to improve the quality of the potassium titanate fiber, promote the potassium titanate fiber to generate chemical reaction with other raw materials within shorter time after the potassium titanate fiber is added into the raw material of the carbon-based ceramic friction material, improve the toughness, abrasion-resistant property, heat stability, and dynamic and static friction coefficient ratio of the carbon-based ceramic friction material, and further improve the safety.
Description
Technical field
The present invention relates to carbon base ceramics friction materials Feedstock treating technical field, especially a kind of carbon base ceramics friction materials potassium titanate fiber method of modifying.
Background technology
Potassium titanate fiber is a kind of compound reinforcing fiber materials of excellent performance, usually uses K
2o.nTiO
2represent that it forms, wherein n is 1,2,4,6,8; Because the numerical value of n is different, its performance is also comparatively different, and the performance different according to it, be applied to the effect that every field plays also not identical, and when being applied to friction material field for above-mentioned potassium titanate fiber, it can improve the security of the frictional coefficient of friction materials, thermostability, raising friction materials.But, owing to there is more potassium titanate fiber preparation method in prior art, and the quality of potassium titanate fiber out prepared by various method is also not identical, and then cause potassium titanate fiber inconsistent for the performance of friction material field, and then cause being applied in the preparation process of friction materials, cause the frictional coefficient of friction materials, thermostability etc. to receive impact, make the inferior quality of the friction materials prepared, security is lower.
Simultaneously, ceramic frication material is due to its superiority, to obtain promotion and application in a big way in recent years, but, ceramic frication material of the prior art, because its material quality is different, proportioning raw materials is different, preparation method is different, the quality of ceramic frication material will be caused different, and for the poor ceramic frication material of feedstock property, make the security of ceramic frication material receive impact, for this reason, raw material for ceramic frication material processes, and improves the quality of raw material, and it becomes another breakthrough of ceramic frication material.
And in traditional ceramic frication material preparation process, have a large amount of investigators using potassium titanate fiber as raw material to prepare ceramic frication material, but due to potassium titanate fiber be applied to friction material field time, its K played a major role according to it
2o.6TiO
2content different, for the frictional coefficient of friction materials, thermostabilitys etc. all have different impacts, and be applied to carbon base ceramics preparation field based on by potassium titanate fiber, due to the characteristic that carbon base ceramics itself possesses, therefore also comparatively strict to the requirement of potassium titanate fiber, so, this investigator carries out modification to the potassium titanate fiber being applied to carbon base ceramics friction material field, and then the quality of the potassium titanate fiber adopted is protected, and then improve frictional coefficient and the thermostability of carbon base ceramics friction materials, improve the security of carbon base ceramics friction materials.
Summary of the invention
In order to solve the above-mentioned technical problem existed in prior art, the invention provides a kind of carbon base ceramics friction materials potassium titanate fiber method of modifying.
Be achieved particular by following technical scheme:
A kind of carbon base ceramics friction materials potassium titanate fiber method of modifying, comprises the following steps:
(1) be 1 ~ 3:5 ~ 9 by potassium titanate fiber and clarification liming according to mass ratio, and to be placed on temperature be 100-130 DEG C, employing stirring speed is 100-150r/min stir process 1-5min, add wherein again and account for potassium titanate fiber 0.1-0.3 sewer oil doubly, 0.3-0.5 times rape oil, 0.3-0.4 pine tar doubly, and to adjust temperature be 70-90 DEG C, stirring velocity is 400-600r/min stir process 3-10min, then is placed in processor for ultrasonic wave and processes 20-30min;
(2) compound alkaline catalysts is added in the material processed to step 1, and adopted ultrasonication 10-20s, add a potassium titanate and/or two potassium titanates and/or potassium tetratitanate and/or eight potassium titanates more wherein, and add the diesel oil accounting for pine tar 3-7 times wherein, and to be placed on vacuum tightness be under 0.02-0.08MPa, adopt ultrasonication 5-10s, adjustment temperature is 400-500 DEG C of process 1-3min, adopted the temperature drying and processing of 44-50 DEG C to moisture content to be 8-11% again, can modification be completed.
In described step 1, its processor for ultrasonic wave, its ultrasonic frequency is 80-100Hz.
In described step 2, the ultrasonic frequency of its primary ultrasonication is 1000-2000Hz.
In described step 2, the ultrasonic frequency of its secondary ultrasonication is 500-900Hz.
Described compound alkaline catalysts, its material composition take parts by weight as sodium hydroxide 1-3 part, calcium oxide 3-7 part, ammoniacal liquor 0.3-0.9 part.
Described compound alkaline catalysts, material composition take parts by weight as 2 parts, sodium hydroxide, 5 parts, calcium oxide, ammoniacal liquor 0.6 part.
Described compound alkaline catalysts, its preparation method is mixed with ammoniacal liquor by calcium oxide, and by sodium hydroxide instillation wherein, and in the process of instillation, adopt ultrasonication, hyperacoustic frequency is 10-50Hz.
Compared with prior art, technique effect of the present invention is embodied in:
By potassium titanate fiber being adopted the pre-treatment of clarification liming, adopt sewer oil again, rape oil, pine tar adds ultrasonication, and then the activity of potassium titanate fiber is enhanced, promote the degree of activation of potassium titanate fiber, add compound alkaline catalysts again, supplement titanium potassium element, add pine tar again, ultrasonication after diesel oil, and then the quality of potassium titanate fiber is improved, and then improve potassium titanate fiber in the raw material joining carbon base ceramics friction materials after, can in the short period of time with other raw material generation chemical actions, and then reach the toughness improving carbon base ceramics friction materials, wear resistance, thermostability, improve the static and dynamic friction coefficient ratio of carbon base ceramics friction materials, improve security.
The present invention is the mode of processing parameter in combined process step and raw material mixing match, and then make the quality of potassium titanate fiber obtain guarantee, and the processing mode of combined process step and each raw material allocate ratio into, and then make potassium titanate fiber can meet the requirement of carbon base ceramics friction materials, potassium titanate fiber is contributed to the toughness of carbon base ceramics friction materials, thermostability, and then make the high thermal resistance of the carbon base ceramics friction materials adopting this modification potassium titanate fiber to prepare comparatively strong, and static and dynamic friction coefficient ratio reaches 97.56-98.35%.
Embodiment
Below in conjunction with concrete embodiment, further restriction is done to technical scheme of the present invention, but claimed scope is not only confined to done description.
Embodiment 1
A kind of carbon base ceramics friction materials potassium titanate fiber method of modifying, comprises the following steps:
(1) be 1:5 by potassium titanate fiber and clarification liming according to mass ratio, and to be placed on temperature be 100 DEG C, employing stirring speed is 100r/min stir process 1min, add the sewer oil accounting for potassium titanate fiber 0.1 times, 0.3 times of rape oil, the pine tar of 0.3 times more wherein, and to adjust temperature be 70 DEG C, stirring velocity is 400r/min stir process 3min, then is placed in processor for ultrasonic wave and processes 20min;
(2) compound alkaline catalysts is added in the material processed to step 1, and adopted ultrasonication 10s, add a potassium titanate and/or two potassium titanates and/or potassium tetratitanate and/or eight potassium titanates more wherein, add-on is often liter of clarification liming 20g, and add the diesel oil accounting for pine tar 3 times wherein, and to be placed on vacuum tightness be under 0.02MPa, adopt ultrasonication 5s, adjustment temperature is 400 DEG C of process 1min, adopted the temperature drying and processing of 44 DEG C to moisture content to be 8% again, can modification be completed.
In described step 1, its processor for ultrasonic wave, its ultrasonic frequency is 80Hz.
In described step 2, the ultrasonic frequency of its primary ultrasonication is 1000Hz.
In described step 2, the ultrasonic frequency of its secondary ultrasonication is 500Hz.
Described compound alkaline catalysts, its material composition is sodium hydroxide 1kg, calcium oxide 3kg, ammoniacal liquor 0.3kg by weight.
Described compound alkaline catalysts, its preparation method is mixed with ammoniacal liquor by calcium oxide, and by sodium hydroxide instillation wherein, and in the process of instillation, adopt ultrasonication, hyperacoustic frequency is 10Hz.
Embodiment 2
A kind of carbon base ceramics friction materials potassium titanate fiber method of modifying, comprises the following steps:
(1) be 3:9 by potassium titanate fiber and clarification liming according to mass ratio, and to be placed on temperature be 130 DEG C, employing stirring speed is 150r/min stir process 5min, add the sewer oil accounting for potassium titanate fiber 0.3 times, 0.5 times of rape oil, the pine tar of 0.4 times more wherein, and to adjust temperature be 90 DEG C, stirring velocity is 600r/min stir process 10min, then is placed in processor for ultrasonic wave and processes 30min;
(2) compound alkaline catalysts is added in the material processed to step 1, and adopted ultrasonication 20s, add a potassium titanate and/or two potassium titanates and/or potassium tetratitanate and/or eight potassium titanates more wherein, add-on is often liter of clarification liming 30g, and add the diesel oil accounting for pine tar 7 times wherein, and to be placed on vacuum tightness be under 0.08MPa, adopt ultrasonication 10s, adjustment temperature is 500 DEG C of process 3min, adopted the temperature drying and processing of 50 DEG C to moisture content to be 11% again, can modification be completed.
In described step 1, its processor for ultrasonic wave, its ultrasonic frequency is 100Hz.
In described step 2, the ultrasonic frequency of its primary ultrasonication is 2000Hz.
In described step 2, the ultrasonic frequency of its secondary ultrasonication is 900Hz.
Described compound alkaline catalysts, its material composition is sodium hydroxide 3kg, calcium oxide 7kg, ammoniacal liquor 0.9kg by weight.
Described compound alkaline catalysts, its preparation method is mixed with ammoniacal liquor by calcium oxide, and by sodium hydroxide instillation wherein, and in the process of instillation, adopt ultrasonication, hyperacoustic frequency is 50Hz.
Embodiment 3
A kind of carbon base ceramics friction materials potassium titanate fiber method of modifying, comprises the following steps:
(1) be 2:7 by potassium titanate fiber and clarification liming according to mass ratio, and to be placed on temperature be 120 DEG C, employing stirring speed is 130r/min stir process 4min, add the sewer oil accounting for potassium titanate fiber 0.2 times, 0.4 times of rape oil, the pine tar of 0.35 times more wherein, and to adjust temperature be 80 DEG C, stirring velocity is 500r/min stir process 7min, then is placed in processor for ultrasonic wave and processes 25min;
(2) compound alkaline catalysts is added in the material processed to step 1, and adopted ultrasonication 15s, add a potassium titanate and/or two potassium titanates and/or potassium tetratitanate and/or eight potassium titanates more wherein, add-on is often liter of clarification liming 40g, and add the diesel oil accounting for pine tar 5 times wherein, and to be placed on vacuum tightness be under 0.06MPa, adopt ultrasonication 8s, adjustment temperature is 450 DEG C of process 2min, adopted the temperature drying and processing of 49 DEG C to moisture content to be 9% again, can modification be completed.
In described step 1, its processor for ultrasonic wave, its ultrasonic frequency is 90Hz.
In described step 2, the ultrasonic frequency of its primary ultrasonication is 1500Hz.
In described step 2, the ultrasonic frequency of its secondary ultrasonication is 700Hz.
Described compound alkaline catalysts, its material composition is sodium hydroxide 2kg, calcium oxide 5kg, ammoniacal liquor 0.6kg by weight.
Described compound alkaline catalysts, its preparation method is mixed with ammoniacal liquor by calcium oxide, and by sodium hydroxide instillation wherein, and in the process of instillation, adopt ultrasonication, hyperacoustic frequency is 30Hz.
Claims (7)
1. a carbon base ceramics friction materials potassium titanate fiber method of modifying, is characterized in that, comprise the following steps:
(1) be 1 ~ 3:5 ~ 9 by potassium titanate fiber and clarification liming according to mass ratio, and to be placed on temperature be 100-130 DEG C, employing stirring speed is 100-150r/min stir process 1-5min, add wherein again and account for potassium titanate fiber 0.1-0.3 sewer oil doubly, 0.3-0.5 times rape oil, 0.3-0.4 pine tar doubly, and to adjust temperature be 70-90 DEG C, stirring velocity is 400-600r/min stir process 3-10min, then is placed in processor for ultrasonic wave and processes 20-30min;
(2) compound alkaline catalysts is added in the material processed to step 1, and adopted ultrasonication 10-20s, add a potassium titanate and/or two potassium titanates and/or potassium tetratitanate and/or eight potassium titanates more wherein, and add the diesel oil accounting for pine tar 3-7 times wherein, and to be placed on vacuum tightness be under 0.02-0.08MPa, adopt ultrasonication 5-10s, adjustment temperature is 400-500 DEG C of process 1-3min, adopted the temperature drying and processing of 44-50 DEG C to moisture content to be 8-11% again, can modification be completed.
2. carbon base ceramics friction materials potassium titanate fiber method of modifying as claimed in claim 1, it is characterized in that, in described step 1, its processor for ultrasonic wave, its ultrasonic frequency is 80-100Hz.
3. carbon base ceramics friction materials potassium titanate fiber method of modifying as claimed in claim 1, it is characterized in that, in described step 2, the ultrasonic frequency of its primary ultrasonication is 1000-2000Hz.
4. carbon base ceramics friction materials potassium titanate fiber method of modifying as claimed in claim 1, it is characterized in that, in described step 2, the ultrasonic frequency of its secondary ultrasonication is 500-900Hz.
5. carbon base ceramics friction materials potassium titanate fiber method of modifying as claimed in claim 1, it is characterized in that, described compound alkaline catalysts, its material composition take parts by weight as sodium hydroxide 1-3 part, calcium oxide 3-7 part, ammoniacal liquor 0.3-0.9 part.
6. the carbon base ceramics friction materials potassium titanate fiber method of modifying as described in claim 1 or 5, is characterized in that, described compound alkaline catalysts, and material composition take parts by weight as 2 parts, sodium hydroxide, 5 parts, calcium oxide, ammoniacal liquor 0.6 part.
7. the carbon base ceramics friction materials potassium titanate fiber method of modifying as described in claim 1 or 5, it is characterized in that, described compound alkaline catalysts, its preparation method is mixed with ammoniacal liquor by calcium oxide, and by sodium hydroxide instillation wherein, and in the process of instillation, adopt ultrasonication, hyperacoustic frequency is 10-50Hz.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111254381A (en) * | 2019-12-31 | 2020-06-09 | 江苏拓展新材料科技有限公司 | Modification method for improving performance of stainless steel material |
| CN115259851A (en) * | 2022-07-28 | 2022-11-01 | 镇江创时纳米材料有限公司 | Special potassium titanate for ceramic type brake pad friction material, disc type brake pad and preparation method of special potassium titanate |
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| US20020012783A1 (en) * | 1999-12-20 | 2002-01-31 | Akebono Brake Industry Co., Ltd. | Friction material |
| EP1612323A1 (en) * | 2004-06-30 | 2006-01-04 | Aichi Prefectural Government | Method for modifying fibers and modified fibers |
| JP2007039833A (en) * | 2005-08-03 | 2007-02-15 | Teijin Fibers Ltd | Method for producing modified polyester fiber |
| US20070219289A1 (en) * | 2006-03-15 | 2007-09-20 | Federal-Mogul World Wide, Inc. | Friction Material |
| CN104152751A (en) * | 2014-07-07 | 2014-11-19 | 马鞍山市万鑫铸造有限公司 | Modified potassium titanate whisker contained aluminum-based composite heat radiating material for LED |
| CN104230362A (en) * | 2014-08-28 | 2014-12-24 | 万山特区宏安摩擦材料有限公司 | Method for modifying ceramic fiber in carbon-based ceramic brake block raw material |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020012783A1 (en) * | 1999-12-20 | 2002-01-31 | Akebono Brake Industry Co., Ltd. | Friction material |
| EP1612323A1 (en) * | 2004-06-30 | 2006-01-04 | Aichi Prefectural Government | Method for modifying fibers and modified fibers |
| JP2007039833A (en) * | 2005-08-03 | 2007-02-15 | Teijin Fibers Ltd | Method for producing modified polyester fiber |
| US20070219289A1 (en) * | 2006-03-15 | 2007-09-20 | Federal-Mogul World Wide, Inc. | Friction Material |
| CN104152751A (en) * | 2014-07-07 | 2014-11-19 | 马鞍山市万鑫铸造有限公司 | Modified potassium titanate whisker contained aluminum-based composite heat radiating material for LED |
| CN104230362A (en) * | 2014-08-28 | 2014-12-24 | 万山特区宏安摩擦材料有限公司 | Method for modifying ceramic fiber in carbon-based ceramic brake block raw material |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111254381A (en) * | 2019-12-31 | 2020-06-09 | 江苏拓展新材料科技有限公司 | Modification method for improving performance of stainless steel material |
| CN115259851A (en) * | 2022-07-28 | 2022-11-01 | 镇江创时纳米材料有限公司 | Special potassium titanate for ceramic type brake pad friction material, disc type brake pad and preparation method of special potassium titanate |
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