CN103553567A - Preparation method of high-strength aluminium porcelain pillar type insulator porcelain body - Google Patents
Preparation method of high-strength aluminium porcelain pillar type insulator porcelain body Download PDFInfo
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- CN103553567A CN103553567A CN201310529773.4A CN201310529773A CN103553567A CN 103553567 A CN103553567 A CN 103553567A CN 201310529773 A CN201310529773 A CN 201310529773A CN 103553567 A CN103553567 A CN 103553567A
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Abstract
The invention provides a preparation method of a high-strength aluminium porcelain pillar type insulator porcelain body. The preparation method of the high-strength aluminium porcelain pillar type insulator porcelain body comprises the following steps: preparing flint clay, industrial alumina powder, feldspar and a plasticizer into raw materials; adding a right amount of water to the raw materials, and then milling, thus obtaining the uniformly mixed raw material slurry; drying the raw material slurry, extruding the dried raw material slurry so as to obtain material mud, putting the material mud in a mold for molding so as to obtain a molded green body, and drying the molded green body so as to obtain the green body for sintering; and coating an enamel layer on the surface of the green body, sintering the green body coated with the enamel layer, and cooling to obtain the high-strength aluminium porcelain pillar type insulator porcelain body. The insulator porcelain body prepared by the preparation method of the high-strength aluminium porcelain pillar type insulator porcelain body has excellent mechanical property, relatively long service life and relatively high reliability.
Description
Technical field
The present invention relates to a kind of preparation method of high-strength aluminum porcelain column support type insulator porcelain body, belong to high-voltage transmission equipment and manufacture field.
Background technology
Column support type porcelain insulator is the important component part of transmitting line and substation, is mainly used in the insulation of power station, substation bus bar etc. and machinery is fixing and as the building block of isolator etc.It is generally comprised of cement mucilage binding solid porcelain body and upper and lower metal-ware.As the porcelain body of insulator main part, its characteristic and quality have directly determined insulator reliability of operation.And most of porcelain bodies are extremely low without intrinsic deformation energy and toughness, under complex stress effect, very little discontinuous stress very likely causes the brittle failure in whole cross section.
At present, in-service insulator is due to for a long time in open-air atmosphere, and work under bad environment, is subject to external influence factor a lot, and for example the variation of wind, rain, hail, snow, Exposure to Sunlight and the weather temperature difference all makes the additional stress of porcelain body increase.According to State Power Corporation statistics, the accident of power supply causing because of porcelain body fracture has become first of electric power system fault rate at present, has caused huge loss and impact to industrial production and people's lives.
Therefore, prepare a kind of good mechanical performance, long service life, column support type insulator porcelain body that reliability is high is one of this area problem demanding prompt solution.
Summary of the invention
In order to address the above problem, the object of the present invention is to provide a kind of preparation method of high-strength aluminum porcelain column support type insulator porcelain body, this preparation method is simple, with low cost, can improve the mechanical property of porcelain body.
The present invention also aims to provide a kind of high-strength aluminum porcelain column support type insulator porcelain body, it selects alumina content high, the aluminium matter porcelain that the foreign matter content such as iron, titanium is low is porcelain body, porcelain body with respect to other kind has higher mechanical property, has longer work-ing life and the reliability of Geng Gao.
In order to achieve the above object, first the present invention provides a kind of preparation method of high-strength aluminum porcelain column support type insulator porcelain body, and it comprises the following steps:
Step 1: by weight percentage, by flint clay 70%-90%, commercial alumina powder 5%-22%, feldspar 3%-5% and softening agent 1%-3%, be made into raw material, each feed composition weight percent sum is 100%;
Step 2: add appropriate water in above-mentioned raw materials, then mill, the raw material slurry that obtains mixing;
Step 3: above-mentioned raw materials slurry is placed at 60 ℃-90 ℃ and is dried, then dried raw material slurry is extruded, obtain material mud, pack material mud into in-mold molding, obtain the base substrate of moulding, the base substrate of moulding is dried at 90-150 ℃, obtain sintering green compact;
Step 4: be coated with glaze layer on above-mentioned green compact surface, then carry out sintering to scribbling the green compact of glaze layer at 1150 ℃-1400 ℃, can obtain high-strength aluminum porcelain column support type insulator porcelain body after cooling.
In the preparation method of high-strength aluminum porcelain column support type insulator porcelain body provided by the invention, preferred, the particle diameter of described flint clay, commercial alumina powder, feldspar is and can passes through 300-600 object mesh screen.
According to specific embodiment of the invention scheme, preferred, described feldspar is one or more the combination in potassium felspar sand, lime feldspar, andesine, labradorite and albite.
In the preparation method of high-strength aluminum porcelain column support type insulator porcelain body provided by the invention, preferred, the Al of described flint clay
2o
3mass content>=44%, Fe
2o
3mass content≤1.5%.
In the preparation method of high-strength aluminum porcelain column support type insulator porcelain body provided by the invention, preferred, described softening agent is one or more the combination in resol, polyvinyl alcohol and polyoxyethylene glycol.
In the preparation method of above-mentioned insulator porcelain body provided by the invention, preferred, the 15%-30% that the amount that adds water in described step 2 is raw materials quality.
In the preparation method of above-mentioned insulator porcelain body provided by the invention, preferred, in described step 2, grinding time is 2-8 hour.
In the preparation method of above-mentioned insulator porcelain body provided by the invention, preferred, the water ratio that in described step 3, raw material slurry is dried to raw material slurry is 5wt%-10wt%.
The present invention also provides a kind of high-strength aluminum porcelain column support type insulator porcelain body, and it is that preparation method by above-mentioned insulator porcelain body prepares.
High-strength aluminum porcelain column support type insulator porcelain body provided by the present invention and preparation method thereof is compared with existing column support type insulator porcelain body, and tool has the following advantages:
1, high-strength aluminum porcelain column support type insulator porcelain body of the present invention, select alumina content high, the aluminium matter porcelain that the foreign matter content such as iron, titanium is low is porcelain body, with respect to the porcelain body of other kind, has higher mechanical property, has longer work-ing life and the reliability of Geng Gao.
2, the preparation method of high-strength aluminum porcelain column support type insulator porcelain body of the present invention, has adopted alumina content is higher, ferriferous oxide content is lower flint clay as main raw material, selects the granularity of raw material thinner simultaneously, has shortened grinding time.
3, in the preparation method of high-strength aluminum porcelain column support type insulator porcelain body of the present invention, in the porcelain body after sintering, alumina content is high, and size of microcrystal is less, can improve the mechanical property of porcelain body.
4, high-strength aluminum porcelain column support type insulator porcelain body of the present invention, selects flint clay that price is lower as main raw material, greatly reduces its production cost.
Embodiment
For technical characterictic of the present invention, object and beneficial effect being had more clearly, understand, existing technical scheme of the present invention is carried out to following detailed description, but can not be interpreted as restriction that can practical range of the present invention.
Embodiment 1
First the present embodiment provides a kind of preparation method of high-strength aluminum porcelain column support type insulator porcelain body, and it comprises the following steps:
Step 1: by weight percentage, flint clay 70%, commercial alumina powder 22%, potassium felspar sand 5% and resol 3% are mixed, be made into raw material;
Step 2: add the water that accounts for raw materials quality 15% in above-mentioned raw materials, then mill, mill 2 hours, the raw material slurry that obtains mixing;
Step 3: above-mentioned raw materials slurry is placed at 60 ℃ and is dried, until moisture be down to raw material stock quality 5% after, adopt de-airing extruder to extrude raw material slurry, obtain material mud, pack material mud into in-mold molding, obtain the base substrate of moulding, the base substrate of moulding is dried at 90 ℃, obtain sintering green compact;
Step 4: be coated with glaze layer on above-mentioned green compact surface, then enter kiln and carry out sintering to scribbling the green compact of glaze layer at 1400 ℃, can obtain high-strength aluminum porcelain column support type insulator porcelain body after cooling.
The present embodiment also provides a kind of high-strength aluminum porcelain column support type insulator porcelain body, and it is prepared by above-mentioned preparation method.
The high-strength aluminum porcelain column support type insulator porcelain body prepared to the present embodiment carries out flexural strength test according to " fine ceramics bending strength test method (GB/T6569-2006) ", according to " ceramic body apparent porosity, volume density testing method (QB/T1642-2012) ", carry out the test of apparent porosity, test result is: the flexural strength of the high-strength aluminum porcelain column support type insulator porcelain body that the present embodiment makes is 190MPa, and apparent porosity is 1.7%.
Embodiment 2
First the present embodiment provides a kind of preparation method of high-strength aluminum porcelain column support type insulator porcelain body, and it comprises the following steps:
Step 1: by weight percentage, flint clay 90%, commercial alumina powder 5%, albite 3% and polyvinyl alcohol 2% are mixed, be made into raw material;
Step 2: add the water that accounts for raw materials quality 30% in above-mentioned raw materials, then mill, mill 8 hours, the raw material slurry that obtains mixing;
Step 3: above-mentioned raw materials slurry is placed at 90 ℃ and is dried, until moisture be down to raw material stock quality 10% after, adopt de-airing extruder to extrude raw material slurry, obtain material mud, pack material mud into in-mold molding, obtain the base substrate of moulding, the base substrate of moulding is dried at 100 ℃, obtain sintering green compact;
Step 4: be coated with glaze layer on above-mentioned green compact surface, then enter kiln and carry out sintering to scribbling the green compact of glaze layer at 1150 ℃, can obtain high-strength aluminum porcelain column support type insulator porcelain body after cooling.
The present embodiment also provides a kind of high-strength aluminum porcelain column support type insulator porcelain body, and it is prepared by above-mentioned preparation method.
The high-strength aluminum porcelain column support type insulator porcelain body prepared to the present embodiment carries out flexural strength test according to " fine ceramics bending strength test method (GB/T6569-2006) ", according to " ceramic body apparent porosity, volume density testing method (QB/T1642-2012) ", carry out the test of apparent porosity, test result is: the flexural strength of the high-strength aluminum porcelain column support type insulator porcelain body that the present embodiment makes is 194MPa, and apparent porosity is 1.9%.
Embodiment 3
First the present embodiment provides a kind of preparation method of high-strength aluminum porcelain column support type insulator porcelain body, and it comprises the following steps:
Step 1: by weight percentage, flint clay 80%, commercial alumina powder 13.5%, lime feldspar 4% and polyoxyethylene glycol 2.5% are mixed, be made into raw material;
Step 2: add the water that accounts for raw materials quality 25% in above-mentioned raw materials, then mill, mill 6 hours, the raw material slurry that obtains mixing;
Step 3: above-mentioned raw materials slurry is placed at 80 ℃ and is dried, until moisture be down to raw material stock quality 8% after, adopt de-airing extruder to extrude raw material slurry, obtain material mud, pack material mud into in-mold molding, obtain the base substrate of moulding, the base substrate of moulding is dried at 110 ℃, obtain sintering green compact;
Step 4: be coated with glaze layer on above-mentioned green compact surface, then enter kiln and carry out sintering to scribbling the green compact of glaze layer at 1300 ℃, can obtain high-strength aluminum porcelain column support type insulator porcelain body after cooling.
The present embodiment also provides a kind of high-strength aluminum porcelain column support type insulator porcelain body, and it is prepared by above-mentioned preparation method.
The high-strength aluminum porcelain column support type insulator porcelain body prepared to the present embodiment carries out flexural strength test according to " fine ceramics bending strength test method (GB/T6569-2006) ", according to " ceramic body apparent porosity, volume density testing method (QB/T1642-2012) ", carry out the test of apparent porosity, test result is: the flexural strength of the high-strength aluminum porcelain column support type insulator porcelain body that the present embodiment makes is 185MPa, and apparent porosity is 2.1%.
Embodiment 4
First the present embodiment provides a kind of preparation method of high-strength aluminum porcelain column support type insulator porcelain body, and it comprises the following steps:
Step 1: by weight percentage, flint clay 85%, commercial alumina powder 10%, labradorite 4% and polyvinyl alcohol 1% are mixed, be made into raw material;
Step 2: add the water that accounts for raw materials quality 30% in above-mentioned raw materials, then mill, mill 4 hours, the raw material slurry that obtains mixing;
Step 3: above-mentioned raw materials slurry is placed at 85 ℃ and is dried, until moisture be down to raw material stock quality 10% after, adopt de-airing extruder to extrude raw material slurry, obtain material mud, pack material mud into in-mold molding, obtain the base substrate of moulding, the base substrate of moulding is dried at 150 ℃, obtain sintering green compact;
Step 4: be coated with glaze layer on above-mentioned green compact surface, then enter kiln and carry out sintering to scribbling the green compact of glaze layer at 1250 ℃, can obtain high-strength aluminum porcelain column support type insulator porcelain body after cooling.
The present embodiment also provides a kind of high-strength aluminum porcelain column support type insulator porcelain body, and it is prepared by above-mentioned preparation method.
The high-strength aluminum porcelain column support type insulator porcelain body prepared to the present embodiment carries out flexural strength test according to " fine ceramics bending strength test method (GB/T6569-2006) ", according to " ceramic body apparent porosity, volume density testing method (QB/T1642-2012) ", carry out the test of apparent porosity, test result is: the flexural strength of the high-strength aluminum porcelain column support type insulator porcelain body that the present embodiment makes is 189MPa, and apparent porosity is 1.8%.
Embodiment 5
First the present embodiment provides a kind of preparation method of high-strength aluminum porcelain column support type insulator porcelain body, and it comprises the following steps:
Step 1: by weight percentage, flint clay 75%, commercial alumina powder 19%, andesine 4% and resol 2% are mixed, be made into raw material;
Step 2: add the water that accounts for raw materials quality 20% in above-mentioned raw materials, then mill, mill 6 hours, the raw material slurry that obtains mixing;
Step 3: above-mentioned raw materials slurry is placed at 70 ℃ and is dried, until moisture be down to raw material stock quality 7% after, adopt de-airing extruder to extrude raw material slurry, obtain material mud, pack material mud into in-mold molding, obtain the base substrate of moulding, the base substrate of moulding is dried at 120 ℃, obtain sintering green compact;
Step 4: be coated with glaze layer on above-mentioned green compact surface, then enter kiln and carry out sintering to scribbling the green compact of glaze layer at 1350 ℃, can obtain high-strength aluminum porcelain column support type insulator porcelain body after cooling.
The present embodiment also provides a kind of high-strength aluminum porcelain column support type insulator porcelain body, and it is prepared by above-mentioned preparation method.
The high-strength aluminum porcelain column support type insulator porcelain body prepared to the present embodiment carries out flexural strength test according to " fine ceramics bending strength test method (GB/T6569-2006) ", according to " ceramic body apparent porosity, volume density testing method (QB/T1642-2012) ", carry out the test of apparent porosity, test result is: the flexural strength of the high-strength aluminum porcelain column support type insulator porcelain body that the present embodiment makes is 187MPa, and apparent porosity is 2.0%.
Above-mentioned experimental data shows, high-strength aluminum porcelain column support type insulator porcelain body prepared by the present invention has higher mechanical property, better compactness extent, and this has further improved its physical strength, thereby reached, increase the service life, improve the object of safe reliability.
Claims (9)
1. a preparation method for high-strength aluminum porcelain column support type insulator porcelain body, it comprises the following steps:
Step 1: by weight percentage, by flint clay 70%-90%, commercial alumina powder 5%-22%, feldspar 3%-5% and softening agent 1%-3%, be made into raw material, each feed composition weight percent sum is 100%;
Step 2: add appropriate water in above-mentioned raw materials, then mill, the raw material slurry that obtains mixing;
Step 3: above-mentioned raw materials slurry is placed at 60 ℃-90 ℃ and is dried, then dried raw material slurry is extruded, obtain material mud, pack material mud into in-mold molding, obtain the base substrate of moulding, the base substrate of moulding is dried at 90-150 ℃, obtain sintering green compact;
Step 4: be coated with glaze layer on above-mentioned green compact surface, then carry out sintering to scribbling the green compact of glaze layer at 1150 ℃-1400 ℃, can obtain high-strength aluminum porcelain column support type insulator porcelain body after cooling.
2. preparation method according to claim 1, wherein, the particle diameter of described flint clay, commercial alumina powder, feldspar is and can passes through 300-600 object mesh screen.
3. preparation method according to claim 1 and 2, wherein, described feldspar is one or more the combination in potassium felspar sand, lime feldspar, andesine, labradorite and albite.
4. preparation method according to claim 1 and 2, wherein, the Al of described flint clay
2o
3mass content>=44%, Fe
2o
3mass content≤1.5%.
5. preparation method according to claim 1, wherein, described softening agent is one or more the combination in resol, polyvinyl alcohol and polyoxyethylene glycol.
6. preparation method according to claim 1, wherein, the 15%-30% that the amount that adds water in described step 2 is raw materials quality.
7. preparation method according to claim 1, wherein, in described step 2, grinding time is 2-8 hour.
8. preparation method according to claim 1, wherein, the water ratio that in described step 3, raw material slurry is dried to raw material slurry is 5wt%-10wt%.
9. a high-strength aluminum porcelain column support type insulator porcelain body, it is that the preparation method described in any one makes in claim 1-8.
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| CN201310529773.4A CN103553567B (en) | 2013-10-31 | 2013-10-31 | A kind of preparation method of high-strength aluminium porcelain pillar type insulator porcelain body |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104590030A (en) * | 2014-12-12 | 2015-05-06 | 株洲鼎顺新材料科技有限公司 | Bus brace and pantograph brace porcelain insulator on roof of electric locomotive |
| CN105503153A (en) * | 2015-12-09 | 2016-04-20 | 醴陵华鑫电瓷科技股份有限公司 | Continuous production process of 500KV insulating insulator |
| CN111004040A (en) * | 2020-01-02 | 2020-04-14 | 四会市奥耳新材料有限公司 | Liquid intensifier |
| CN115650705A (en) * | 2022-11-02 | 2023-01-31 | 江西省星海电瓷制造有限公司 | Formula of high-strength porcelain insulator active industrial alumina porcelain |
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| CN1990420A (en) * | 2005-12-27 | 2007-07-04 | 叶胜平 | Aluminum oxide electric porcelain |
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| CN1990420A (en) * | 2005-12-27 | 2007-07-04 | 叶胜平 | Aluminum oxide electric porcelain |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104590030A (en) * | 2014-12-12 | 2015-05-06 | 株洲鼎顺新材料科技有限公司 | Bus brace and pantograph brace porcelain insulator on roof of electric locomotive |
| CN105503153A (en) * | 2015-12-09 | 2016-04-20 | 醴陵华鑫电瓷科技股份有限公司 | Continuous production process of 500KV insulating insulator |
| CN111004040A (en) * | 2020-01-02 | 2020-04-14 | 四会市奥耳新材料有限公司 | Liquid intensifier |
| CN115650705A (en) * | 2022-11-02 | 2023-01-31 | 江西省星海电瓷制造有限公司 | Formula of high-strength porcelain insulator active industrial alumina porcelain |
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