CN110922157A - Electroceramic blank and manufacturing method thereof - Google Patents
Electroceramic blank and manufacturing method thereof Download PDFInfo
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- CN110922157A CN110922157A CN201911307920.7A CN201911307920A CN110922157A CN 110922157 A CN110922157 A CN 110922157A CN 201911307920 A CN201911307920 A CN 201911307920A CN 110922157 A CN110922157 A CN 110922157A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/04—Clay; Kaolin
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/24—Manufacture of porcelain or white ware
- C04B33/26—Manufacture of porcelain or white ware of porcelain for electrical insulation
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Dispersion Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention discloses an electric porcelain blank and a manufacturing method thereof, wherein the electric porcelain blank comprises the following components in parts by weight: 40-53 parts of pug, 32-42 parts of borosilicate glass powder, 22-35 parts of metal oxide, 3-7 parts of adhesive and 35-45 parts of kaolinite, and the method comprises the following steps: 1) simultaneously enabling the electric porcelain blank and ionized water in a weight ratio of 1:1 to flow into a batching tank at a constant speed to be stirred to prepare slurry, 2) stirring the slurry prepared in the step 1, sieving to remove iron to prepare a mud cake, and 3) parallelly placing the mud cake prepared in the step 2 in an alternating current electric field to be fired after blank pressing and blank trimming procedures. The borosilicate glass powder has high hardness, uniform particle size distribution, good chemical stability and high thermal stability, can increase the strength of the electric porcelain and the mechanical property of the electric porcelain, and has low purchase cost.
Description
Technical Field
The invention relates to the field of electric porcelain manufacturing processes, in particular to an electric porcelain blank and a manufacturing method thereof.
Background
The electric porcelain is a component which mainly plays a supporting and insulating role in an electric power system, is mainly applied to electric transmission lines, substations and electrical equipment with various voltage levels in the electric power system, and is mainly applied to other special industries such as the electric power system of rail transit for connecting conductors or components with different potentials and playing insulating and supporting roles, sometimes, the electric porcelain has higher requirements on mechanical performance, electrical performance and environmental resistance (cold and hot, pollution resistance, aging resistance and the like) of containers which are used as other electric components, and if the quality of the electric porcelain is not extremely harmful, the development of the high-strength electric porcelain becomes a great problem.
Disclosure of Invention
The invention provides an electric porcelain blank and a manufacturing method thereof in order to overcome the defects in the prior art.
In order to solve the technical problems, the invention adopts the following technical scheme: the electroceramic blank comprises the following components in parts by weight: 40-53 parts of pug, 32-42 parts of borosilicate glass powder, 22-35 parts of metal oxide, 3-7 parts of adhesive and 35-45 parts of kaolinite.
Preferably, the pug comprises the following components: silicon dioxide, ferric oxide, magnesium oxide, calcium carbonate and water aluminum oxide.
Preferably, the pug comprises the following components in parts by weight: 22-34 parts of silicon dioxide, 15-25 parts of ferric oxide, 35-45 parts of magnesium oxide, 12-15 parts of calcium carbonate and 19-23 parts of hydrated alumina.
Preferably, the metal oxide comprises the following components: alumina, sodium oxide, titanium trioxide, and zirconium dioxide.
Preferably, the metal oxide comprises the following components in parts by weight: 33-45 parts of aluminum oxide, 20-30 parts of sodium oxide, 15-28 parts of titanium trioxide and 20-30 parts of zirconium dioxide.
The manufacturing method of the electric porcelain is characterized by comprising the following steps:
1) simultaneously enabling the electroceramic blank and ionized water in a weight ratio of 1:1 to flow into a batching tank at a constant speed and stirring to prepare slurry;
2) stirring the slurry prepared in the step 1, and sieving to remove iron to prepare mud cakes;
3) and (3) performing blank pressing and blank repairing processes on the mud cakes prepared in the step (2), and then placing the mud cakes in an alternating current electric field in parallel for firing to obtain the initial electric porcelain.
Preferably, the firing process in step 3 is divided into a preheating period, an oxidation period, a reduction period and a heat preservation period.
The temperature of the preheating period is preferably 140-275 ℃ for 6.5-11h, and the temperature of the oxidation period is preferably 235-750 ℃ for 18-25 h.
Preferably, the temperature in the reduction period is 750-; the temperature reduction speed in the heat preservation period is 60-100 ℃/h, and the temperature is reduced to the normal temperature.
Preferably, in the step 2, the sieving and iron removing process specifically comprises the steps of polishing the slurry by using a ball mill, and adsorbing iron in the slurry by using a magnet after obtaining the qualified slurry.
The borosilicate glass powder has high hardness, uniform particle size distribution, good chemical stability and high thermal stability, can increase the strength of the electric porcelain and the mechanical property of the electric porcelain, and has low purchase cost.
Detailed Description
The present invention will be described in detail with reference to examples.
Example 1
The invention provides an electric porcelain blank which comprises the following components in parts by weight: 40 parts of pug, 32 parts of borosilicate glass powder, 22 parts of metal oxide, 3 parts of adhesive and 35 parts of kaolinite; the mud comprises the following components in parts by weight: 22 parts of silicon dioxide, 15 parts of ferric oxide, 35 parts of magnesium oxide, 12 parts of calcium carbonate and 19 parts of hydrated alumina; the metal oxide comprises the following components in parts by weight: 33 parts of aluminum oxide, 20 parts of sodium oxide, 15 parts of titanium trioxide and 20 parts of zirconium dioxide.
Example 2
The electroceramic blank comprises the following components in parts by weight: 53 parts of pug, 42 parts of borosilicate glass powder, 35 parts of metal oxide, 7 parts of adhesive and 45 parts of kaolinite; the mud comprises the following components in parts by weight: 34 parts of silicon dioxide, 25 parts of ferric oxide, 45 parts of magnesium oxide, 15 parts of calcium carbonate and 23 parts of hydrated alumina; the metal oxide comprises the following components in parts by weight: 45 parts of aluminum oxide, 30 parts of sodium oxide, 28 parts of titanium trioxide and 30 parts of zirconium dioxide.
Example 3
The electroceramic blank comprises the following components in parts by weight: 45 parts of pug, 40 parts of borosilicate glass powder, 31 parts of metal oxide, 4 parts of adhesive and 40 parts of kaolinite; the mud comprises the following components in parts by weight: 28 parts of silicon dioxide, 20 parts of ferric oxide, 40 parts of magnesium oxide, 13 parts of calcium carbonate and 19 parts of hydrated alumina; the metal oxide comprises the following components in parts by weight: 40 parts of aluminum oxide, 23 parts of sodium oxide, 20 parts of titanium trioxide and 25 parts of zirconium dioxide.
Comparative example 1
The electroceramic blank comprises the following components in parts by weight: 35 parts of pug, 4 parts of adhesive and 45 parts of kaolinite; the mud comprises the following components in parts by weight: 25 parts of silicon dioxide, 20 parts of ferric oxide, 13 parts of calcium carbonate, 40 parts of aluminum oxide and 23 parts of sodium oxide.
The electric porcelain blanks of the example 1, the example 2, the example 3 and the comparative example 1 are produced by the same conventional method, wherein A, B, C, D electric porcelains with four specifications are respectively produced, A, B, C, D electric shock experiments with 220kv are respectively carried out, and the data of the breakdown times are as follows:
| 220kv breakdown | |
| Example 1(A) | 2 |
| Example 2(B) | 0 |
| Example 3(C) | 1 |
| Comparative example 1 | 5 |
It can be seen that in each of examples 1, 2 and 3, the number of times of puncture of the electric porcelain in 220kv was less than that of the electric porcelain produced from the electric porcelain blank of comparative example 1, and it can be seen that the high-voltage strength of the electric porcelain can be enhanced by adding borosilicate glass powder, 40 parts of magnesium oxide, titanium trioxide and zirconium dioxide to the blank.
Example 4
A method for manufacturing an electric porcelain, in which an electric porcelain blank is the embodiment 1, includes the following steps: 1) simultaneously enabling the electroceramic blank and ionized water in a weight ratio of 1:1 to flow into a batching tank at a constant speed and stirring to prepare slurry;
2) stirring the slurry prepared in the step 1, then polishing the slurry by using a ball mill to obtain qualified slurry, adsorbing iron in the slurry by using a magnet, and sieving to remove the iron to prepare a mud cake;
3) after the mud cakes prepared in the step 2 are subjected to blank pressing and blank repairing procedures, the mud cakes are placed in an alternating current electric field in parallel to be fired to obtain initial electric porcelain, the firing process is divided into a preheating period, an oxidation period, a reduction period and a heat preservation period, the temperature in the preheating period is 140 ℃, the time is 6.5h, the temperature in the oxidation period is 235 ℃, the time is 18-25h, the temperature in the reduction period is 750 ℃, and the time is 15 h; the temperature reduction speed in the heat preservation period is 60 ℃/h.
Example 5
A method for manufacturing an electric porcelain, in which an electric porcelain blank is the embodiment 1, includes the following steps: 1) simultaneously enabling the electroceramic blank and ionized water in a weight ratio of 1:1 to flow into a batching tank at a constant speed and stirring to prepare slurry;
2) stirring the slurry prepared in the step 1, then polishing the slurry by using a ball mill to obtain qualified slurry, adsorbing iron in the slurry by using a magnet, and sieving to remove the iron to prepare a mud cake;
3) after the mud cakes prepared in the step 2 are subjected to blank pressing and blank repairing procedures, the mud cakes are placed in an alternating current electric field in parallel to be fired to obtain initial electric porcelain, the firing process is divided into a preheating period, an oxidation period, a reduction period and a heat preservation period, the temperature of the preheating period is 140-275 ℃, the time of the preheating period is 6.5-11h, the temperature of the oxidation period is 235-750-; the temperature reduction speed in the heat preservation period is 60-100 ℃/h.
Example 6
A method for manufacturing an electric porcelain, in which an electric porcelain blank is the embodiment 1, includes the following steps: 1) simultaneously enabling the electroceramic blank and ionized water in a weight ratio of 1:1 to flow into a batching tank at a constant speed and stirring to prepare slurry;
4) stirring the slurry prepared in the step 1, then polishing the slurry by using a ball mill to obtain qualified slurry, adsorbing iron in the slurry by using a magnet, and sieving to remove the iron to prepare a mud cake;
3) after the mud cakes prepared in the step 2 are subjected to blank pressing and blank repairing procedures, the mud cakes are placed in an alternating current electric field in parallel to be fired to obtain initial electric porcelain, the firing process is divided into a preheating period, an oxidation period, a reduction period and a heat preservation period, the temperature in the preheating period is 250 ℃, the time is 8h, the temperature in the oxidation period is 700 ℃, the time is 22h, the temperature in the reduction period is 1200 ℃, and the time is 28 h; the temperature reduction speed in the heat preservation period is 100 ℃/h.
Comparative example 2
A method for manufacturing an electric porcelain, in which an electric porcelain blank is the embodiment 1, includes the following steps: 1) simultaneously enabling the electroceramic blank and ionized water in a weight ratio of 1:1 to flow into a batching tank at a constant speed and stirring to prepare slurry;
5) stirring the slurry prepared in the step 1, then polishing the slurry by using a ball mill to obtain qualified slurry, adsorbing iron in the slurry by using a magnet, and sieving to remove the iron to prepare a mud cake;
and (3) performing blank pressing and blank repairing processes on the mud cakes prepared in the step (2), and then placing the mud cakes in an alternating current electric field in parallel for firing to obtain the initial electric porcelain.
252kV insulators are prepared in example 4, example 5, example 6 and comparative example 1, the mechanical strength safety coefficient and the tensile strength (MPa) of each insulator are tested by an acoustic emission method, and the test results are as follows:
it can be seen that the mechanical strength safety factor and tensile strength (MPa) are better for examples 4, 5 and 6 than for comparative example 2, with example 6 being better.
The mechanical strength is always the most important performance pursued by the electric porcelain production, and the large shrinkage of the kaolinite generates the compression stress in the porcelain structure in the process of firing and cooling, the borosilicate glass powder has high strength and can prevent the expansion of microcracks, the higher the alumina content in the electric porcelain material is, the higher the applicable voltage level is, the more excellent the material performance is, but the thermal conductivity, the heating shrinkage and the heat capacity of the alumina fiber are all lower, in high-temperature heating, the activity of alumina molecules is unstable, which easily causes uneven molecular mass of the porcelain structure and increased pore density, the magnesium oxide has high temperature resistance and insulating property, is fireproof and heat-proof, can be used for stabilizing the activity of alumina molecules, and controls the activity of the alumina molecules and the uniformity of the molecular mass of the porcelain structure in a preheating period, an oxidation period, a reduction period and a heat preservation period of a firing process.
The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the patent and protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. The electroceramic blank is characterized by comprising the following components in parts by weight: 40-53 parts of pug, 32-42 parts of borosilicate glass powder, 22-35 parts of metal oxide, 3-7 parts of adhesive and 35-45 parts of kaolinite.
2. The electroceramic blank according to claim 1, wherein the paste comprises the following components: silicon dioxide, ferric oxide, magnesium oxide, calcium carbonate and water aluminum oxide.
3. The electroceramic blank according to claim 2, wherein: the mud comprises the following components in parts by weight: 22-34 parts of silicon dioxide, 15-25 parts of ferric oxide, 35-45 parts of magnesium oxide, 12-15 parts of calcium carbonate and 19-23 parts of hydrated alumina.
4. The electroceramic blank according to claim 1, wherein the metal oxide comprises the following components: alumina, sodium oxide, titanium trioxide, and zirconium dioxide.
5. The electroceramic blank according to claim 4, wherein: the metal oxide comprises the following components in parts by weight: 33-45 parts of aluminum oxide, 20-30 parts of sodium oxide, 15-28 parts of titanium trioxide and 20-30 parts of zirconium dioxide.
6. The manufacturing method of the electric porcelain is characterized by comprising the following steps:
1) simultaneously enabling the electroceramic blank and ionized water in a weight ratio of 1:1 to flow into a batching tank at a constant speed and stirring to prepare slurry;
2) stirring the slurry prepared in the step 1, and sieving to remove iron to prepare mud cakes;
3) and (3) performing blank pressing and blank repairing processes on the mud cakes prepared in the step (2), and then placing the mud cakes in an alternating current electric field in parallel for firing to obtain the initial electric porcelain.
7. The method of manufacturing an electroceramic of claim 6, wherein: the firing process in the step 3 is divided into a preheating period, an oxidation period, a reduction period and a heat preservation period.
8. The method of manufacturing an electroceramic of claim 7, wherein: the temperature of the preheating period is 140-275 ℃, and the time is 6.5-11 h; the temperature of the oxidation period is 235-750 ℃, and the time is 18-25 h.
9. The method of manufacturing an electroceramic of claim 8, wherein: the temperature of the reduction period is 750-1200 ℃, and the time is 15-30 h; the temperature reduction speed in the heat preservation period is 60-100 ℃/h, and the temperature is reduced to the normal temperature.
10. The method of manufacturing an electroceramic of claim 6, wherein: in the step 2, the sieving and iron removing process specifically comprises the steps of polishing the slurry by using a ball mill, and adsorbing iron in the slurry by using a magnet after obtaining the qualified slurry.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911307920.7A CN110922157A (en) | 2019-12-18 | 2019-12-18 | Electroceramic blank and manufacturing method thereof |
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| CN201911307920.7A CN110922157A (en) | 2019-12-18 | 2019-12-18 | Electroceramic blank and manufacturing method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112898003A (en) * | 2021-03-18 | 2021-06-04 | 湖南省醴陵市华电电瓷制造有限公司 | High-strength siliceous brown glaze electric porcelain and preparation method thereof |
| CN113061017A (en) * | 2021-05-06 | 2021-07-02 | 许昌市森洋电子材料有限公司 | Method for manufacturing high-strength refrigeration part porcelain plate and refrigeration part |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112898003A (en) * | 2021-03-18 | 2021-06-04 | 湖南省醴陵市华电电瓷制造有限公司 | High-strength siliceous brown glaze electric porcelain and preparation method thereof |
| CN112898003B (en) * | 2021-03-18 | 2021-09-21 | 湖南省醴陵市华电电瓷制造有限公司 | High-strength siliceous brown glaze electric porcelain and preparation method thereof |
| CN113061017A (en) * | 2021-05-06 | 2021-07-02 | 许昌市森洋电子材料有限公司 | Method for manufacturing high-strength refrigeration part porcelain plate and refrigeration part |
| CN113061017B (en) * | 2021-05-06 | 2023-12-26 | 许昌市森洋电子材料有限公司 | Manufacturing method of high-strength refrigerating element porcelain plate and refrigerating element |
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Application publication date: 20200327 |