CN110577396B - Preparation method of high-strength aluminum porcelain insulator porcelain body - Google Patents
Preparation method of high-strength aluminum porcelain insulator porcelain body Download PDFInfo
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- CN110577396B CN110577396B CN201910993488.5A CN201910993488A CN110577396B CN 110577396 B CN110577396 B CN 110577396B CN 201910993488 A CN201910993488 A CN 201910993488A CN 110577396 B CN110577396 B CN 110577396B
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Abstract
The invention discloses a preparation method of a high-strength aluminum porcelain insulator porcelain body, which comprises the following steps of preparing raw materials, preparing a blank, glazing, firing and cooling; according to the invention, by adding low-content sodium tripolyphosphate, the traditional sintering mode and cooling mode are changed, and meanwhile, porcelain sand is added during glazing; the ceramic body prepared by the invention has compact structure and high bending strength, and is suitable for industrial production.
Description
Technical Field
The invention relates to the field of insulators, in particular to a preparation method of a high-strength aluminum porcelain insulator body.
Background
Insulators are devices that are mounted between conductors of different potentials or between a conductor and a ground potential member and are able to withstand the effects of voltage and mechanical stress. The insulating control is a special insulating control and can play an important role in an overhead transmission line. Early-age insulators are mostly used for telegraph poles, and a plurality of disc-shaped insulators are hung at one end of a high-voltage wire connecting tower which is gradually developed, and are usually made of glass or ceramics for increasing creepage distance. Wherein, the porcelain body of porcelain insulator has following characteristics: (1) the larger size, and the larger wall thickness, the thickest part of the wall thickness reaches 175 mm; (2) the structure is relatively complex, and large structural stress is easily generated in the processes of temperature rising and temperature lowering; (3) the dead weight is too large, and the weight of the blank is about 700 kg. Due to the reasons, the insulator is easy to crack in the temperature rising process and easy to crack in the temperature reducing process, so that the production efficiency of the porcelain insulator body is low, the rejection rate is high, and further improvement is needed in both the raw material angle and the manufacturing process angle.
Disclosure of Invention
In order to solve the existing problems, the invention discloses a high-strength aluminum porcelain insulator body which comprises the following raw materials in parts by weight: 20-25 parts of mullite, 50-60 parts of clay, 5-20 parts of talc, 5-10 parts of kaolinite, 10-15 parts of silica powder, 20-30 parts of quartz, 10-15 parts of industrial alumina powder, 0.1-1 part of sodium tripolyphosphate and 300 parts of 100 parts of water;
the invention also discloses a preparation method of the high-strength aluminum porcelain insulator body, which comprises the following steps:
s0: mullite, clay, talc, kaolinite, silica powder, quartz and industrial alumina powder are mixed, milled, deironized and sieved to prepare a raw material;
s1: dissolving sodium tripolyphosphate in water, and uniformly stirring to obtain a mixed solvent;
s2: stirring the raw materials, and adding the mixed solvent into the raw materials by adopting a spraying method while stirring to obtain slurry;
s3: drying the slurry at 30-40 ℃ for 0.5-1h, and then drying at 40-50 ℃ for 1-2h, wherein the water content of the dried slurry is controlled at 5-10%; pugging and injection molding to obtain a green body;
s4: and glazing the surface of the green body, sintering in a kiln, and cooling to obtain the porcelain body.
Preferably, the particle size of the raw material in S1 is 100-300 meshes, wherein the proportion of particles with the particle size of 150-200 meshes is 60-80%, the proportion of particles with the particle size of 100-150 meshes is 10-20%, and the balance is particles with the particle size of 200-300 meshes.
Preferably, the stirring speed of the stirring in S2 is 800-.
Preferably, the sintering process in S4 is 25-80 ℃ for 0.5-1h, 80-100 ℃ for 0.5-1h, 100-700 ℃ for 2-3h, 700-1000 ℃ for 2-3h, 1000-1250 ℃ for 2-3h, and 1250-1300 ℃ for 1.5-3 h.
Preferably, the cooling manner in S4 is to decrease the temperature from 1250-1300 ℃ to 980-1020 ℃ at a temperature decrease rate of 100-200 ℃/h; then reducing the temperature from 980 ℃ to 770 ℃ at a cooling rate of 30-50 ℃/h, and keeping the temperature for 1-2 h; then reducing the temperature from 870 ℃ to 800 ℃ at the temperature reduction speed of 20-30 ℃/h; keeping the temperature for 2-3 h; then reducing the temperature from 750-800 ℃ to 550-560 ℃ at a temperature reduction speed of 20-30 ℃/h; finally, the temperature is reduced from 550 ℃ to 560 ℃ to room temperature at the temperature reduction speed of 20-40 ℃/h.
Preferably, the glazing manner of glazing described in S4 is as follows:
s41: adding porcelain sand, glaze and adhesive into a solvent to prepare mixed glaze;
s42: the mixed glaze is then coated on the green body.
Preferably, the adhesive is carboxymethyl cellulose or polyurethane.
Preferably, the glaze comprises the following raw materials in parts by weight: 3-10 parts of silica sol, 1-4 parts of methylsilane, 15-25 parts of acetic acid and 75-90 parts of propanol.
Preferably, the mass ratio of the porcelain sand, the glaze, the adhesive and the solvent is (3-5): (3-5): (0.1-1): 10.
the invention has the beneficial effects that:
(1) the cooling mode adopted by the invention can effectively ensure that the liquid phase has sufficient time to absorb the stress generated in the processes of converting the liquid phase into the solid phase, separating out crystals and converting at proper temperature. Thus, after the porcelain body is cooled, no residual stress exists in the porcelain body, no cracking and other defects can be generated, and the qualified rate is very high; the method reduces the consumption of time, field, expense and the like caused by the method that the porcelain body sintered by the existing sintering system needs to be placed, secondary tempering treatment and the like to eliminate the internal stress of the porcelain body, and has the advantages of simple operation, good effect, low cost and high efficiency;
(2) the glazing method adopted by the invention is to add the porcelain sand into the glaze, so that on one hand, the friction force of the surface of the green body is increased, the bonding force between the mixed glaze and the green body is enhanced, and simultaneously, the porcelain sand is fused on the surface of the green body and the glaze layer is fused on the surface of the porcelain sand during sintering, so that the glaze layer of the porcelain body is more uniform and compact and is not easy to peel off from the porcelain body, and the electrical performance of the insulator is improved;
(3) by adding low-content sodium tripolyphosphate, on one hand, the electrolyte content is maintained, on the other hand, porcelain body breakage caused by stress generated by migration of excessive sodium ions is avoided, electrolyte particles are uniformly dispersed in slurry and fully adsorbed around barren raw material particles and clay raw material particles to form a 'viscous film', and a mutual combination system of 'barren material-viscous film-barren material, clay-viscous film-barren material and clay-viscous film-clay' is formed after a blank body is dried. The dried ceramic raw material is highly dispersed in a space network formed by the organic binder, and the uniformity of dispersion and wrapping of electrolyte particles (sodium tripolyphosphate) reduces the probability of contact between barren materials, thereby improving the strength; in addition, because the slurry is dried at the temperature of 30-40 ℃ and the temperature of 40-50 ℃, the viscosity of the electrolyte is improved or the aggregation state is changed due to the change of the temperature (the water is slowly reduced), the cohesion of the blank is enhanced, and the strength of the porcelain body is improved;
(4) the control of the particle size of the raw materials is combined with a mixing mode of high-speed stirring and spraying, so that particle aggregates are well prevented from being generated;
(5) the invention adopts a sintering process of staged temperature rise, and well controls the stable transformation of the ceramic crystalline phase.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
Example 1
A preparation method of a high-strength aluminum porcelain insulator porcelain body comprises the following steps:
s0: according to the weight portion, 20 portions of mullite, 50 portions of clay, 5 portions of talcum, 5 portions of kaolinite, 10 portions of silica powder, 20 portions of quartz and 10 portions of industrial alumina powder are mixed, milled, deironized and sieved to prepare a raw material; the particle size of the raw material is 100-300 meshes, wherein the proportion of particles with the particle size of 150-200 meshes is 60%, the proportion of particles with the particle size of 100-150 meshes is 10%, and the balance is particles with the particle size of 200-300 meshes.
S1: dissolving 0.1 part of sodium tripolyphosphate in 100 parts of water, and uniformly stirring to obtain a mixed solvent;
s2: stirring the raw materials at a stirring speed of 800 r/min; adding the mixed solvent into the raw materials by adopting a spraying method while stirring to obtain slurry;
s3: drying the slurry at 30-40 ℃ for 0.5h, and then drying at 40-50 ℃ for 1h, wherein the water content of the dried slurry is controlled at 5%; pugging and injection molding to obtain a green body;
s4: glazing the surface of the green body in the following manner:
s41: adding porcelain sand, glaze and adhesive into a solvent to prepare mixed glaze;
s42: the mixed glaze is then coated on the green body.
The adhesive is carboxymethyl cellulose, and the solvent is water.
The glaze comprises the following raw materials in parts by weight: 3 parts of silica sol, 1 part of methylsilane, 15 parts of acetic acid and 75 parts of propanol.
The mass ratio of the porcelain sand, the glaze, the adhesive and the solvent is 3: 3: 0.1: 10.
sintering in a kiln at 25-80 deg.c for 0.5 hr, 80-100 deg.c for 1 hr, 100 deg.c for 2 hr, 700 deg.c for 3 hr, 1000-1250 deg.c for 2 hr and 1250-1300 deg.c for 1.5 hr, and cooling to obtain the ceramic body. The cooling mode is that the temperature is reduced from 1250-1300 ℃ to 980-1020 ℃ at the temperature reduction speed of 100 ℃/h; then reducing the temperature from 980 ℃ to 770 ℃ to 800 ℃ at the cooling speed of 30 ℃/h, and keeping the temperature for 1 h; then reducing the temperature from 870 ℃ to 750 ℃ at a cooling speed of 20 ℃/h; keeping the temperature for 2 hours; then reducing the temperature from 750-800 ℃ to 550-560 ℃ at a cooling rate of 20 ℃/h; finally, the temperature is reduced from 550 ℃ to 560 ℃ to room temperature at the cooling rate of 20 ℃/h.
Example 2
A preparation method of a high-strength aluminum porcelain insulator porcelain body comprises the following steps:
s0: mixing 25 parts of mullite, 55 parts of clay, 12 parts of talcum, 8 parts of kaolinite, 12 parts of silica powder, 25 parts of quartz and 12 parts of industrial alumina powder according to the parts by weight, grinding, removing iron and sieving to prepare a raw material; the particle size of the raw material is 100-300 meshes, wherein the proportion of particles with the particle size of 150-200 meshes is 70%, the proportion of particles with the particle size of 100-150 meshes is 15%, and the balance is particles with the particle size of 200-300 meshes.
S1: dissolving 0.1 part of sodium tripolyphosphate in 200 parts of water, and uniformly stirring to obtain a mixed solvent;
s2: stirring the raw materials at the stirring speed of 1000 r/min; adding the mixed solvent into the raw materials by adopting a spraying method while stirring to obtain slurry;
s3: drying the slurry at 30-40 ℃ for 1h, and then drying at 40-50 ℃ for 1.5h, wherein the water content of the dried slurry is controlled at 7%; pugging and injection molding to obtain a green body;
s4: glazing the surface of the green body in the following manner:
s41: adding porcelain sand, glaze and adhesive into a solvent to prepare mixed glaze;
s42: the mixed glaze is then coated on the green body.
The adhesive is carboxymethyl cellulose, and the solvent is water.
The glaze comprises the following raw materials in parts by weight: 5 parts of silica sol, 2 parts of methylsilane, 20 parts of acetic acid and 80 parts of propanol.
The mass ratio of the porcelain sand, the glaze, the adhesive and the solvent is 4: 4: 0.5: 10.
sintering in a kiln at 25-80 deg.C for 1h, 80-100 deg.C for 0.5h, 100-700 deg.C for 3h, 700-700 deg.C for 3h, 1000-1250 deg.C for 2h, and 1250-1300 deg.C for 2h, and cooling to obtain the ceramic body; the cooling mode is that the temperature is reduced from 1250-1300 ℃ to 980-1020 ℃ at the cooling speed of 150 ℃/h; then reducing the temperature from 980 ℃ to 770 ℃ to 800 ℃ at the cooling speed of 40 ℃/h, and keeping the temperature for 2 h; then reducing the temperature from 870 ℃ to 750 ℃ at a cooling speed of 25 ℃/h; keeping the temperature for 3 hours; then reducing the temperature from 750-800 ℃ to 550-560 ℃ at the cooling speed of 25 ℃/h; finally, the temperature is reduced from 550 ℃ to 560 ℃ to room temperature at the cooling rate of 30 ℃/h.
Example 3
A preparation method of a high-strength aluminum porcelain insulator porcelain body comprises the following steps:
s0: according to the weight portion, 25 portions of mullite, 60 portions of clay, 20 portions of talcum, 10 portions of kaolinite, 15 portions of silica powder and 30 portions of quartz are mixed, 15 portions of industrial alumina powder are milled, deironized and sieved to prepare raw materials; the particle size of the raw material is 300 meshes, wherein the proportion of particles with the particle size of 150-200 meshes is 80%, the proportion of particles with the particle size of 100-150 meshes is 20%, and the balance is particles with the particle size of 200-300 meshes.
S1: dissolving 0.1 part of sodium tripolyphosphate in 300 parts of water, and uniformly stirring to obtain a mixed solvent;
s2: stirring the raw materials at the stirring speed of 1200 r/min; adding the mixed solvent into the raw materials by adopting a spraying method while stirring to obtain slurry;
s3: drying the slurry at 30-40 ℃ for 1h, and then drying at 40-50 ℃ for 2h, wherein the water content of the dried slurry is controlled at 10%; pugging and injection molding to obtain a green body;
s4: glazing the surface of the green body in the following manner:
s41: adding porcelain sand, glaze and adhesive into a solvent to prepare mixed glaze;
s42: the mixed glaze is then coated on the green body.
The adhesive is carboxymethyl cellulose, and the solvent is water.
The glaze comprises the following raw materials in parts by weight: 10 parts of silica sol, 4 parts of methylsilane, 25 parts of acetic acid and 90 parts of propanol.
The mass ratio of the porcelain sand to the glaze to the adhesive to the solvent is 5: 5: 1: 10.
sintering in a kiln at 25-80 deg.c for 0.5 hr, 80-100 deg.c for 0.5 hr, 100-700 deg.c for 3 hr, 700-1000 deg.c for 3 hr, 1000-1250 deg.c for 2 hr and 1250-1300 deg.c for 1.5 hr, and cooling to obtain the ceramic body. The cooling mode is that firstly, the temperature is reduced from 1250-1300 ℃ to 980-1020 ℃ at the cooling speed of 200 ℃/h; then reducing the temperature from 980 ℃ to 770 ℃ at a cooling rate of 50 ℃/h, and keeping the temperature for 2 h; then the temperature is reduced from 870 ℃ to 800 ℃ at the speed of 30 ℃/h; keeping the temperature for 3 hours; then the temperature is reduced from 750-800 ℃ to 550-560 ℃ at the cooling speed of 30 ℃/h; finally, the temperature is reduced from 550 ℃ to 560 ℃ to room temperature at the cooling rate of 40 ℃/h.
Example 4
The embodiment is further optimized on the basis of embodiment 2, and specifically, the adhesive is polyurethane.
Example 5
The present embodiment is further optimized on the basis of embodiment 2, and specifically, is S1: taking 0.3 part of sodium tripolyphosphate, dissolving in 300 parts of water, and uniformly stirring to obtain a mixed solvent, which is the same as the example 2.
Example 6
The present embodiment is further optimized on the basis of embodiment 2, and specifically, is S1: taking 0.5 part of sodium tripolyphosphate, dissolving in 300 parts of water, and uniformly stirring to obtain a mixed solvent, which is the same as example 2.
Example 7
The present embodiment is further optimized on the basis of embodiment 2, and specifically, is S1: the same procedure as in example 2 was repeated except that 1 part of sodium tripolyphosphate was dissolved in 300 parts of water and the mixture was stirred to obtain a mixed solvent.
Comparative example 1
This comparative example is a variation on the basis of example 2, specifically S1: 3 parts of sodium tripolyphosphate is dissolved in 300 parts of water, and the mixture is uniformly stirred to obtain a mixed solvent, which is the same as the example 2.
Comparative example 2 (traditional glazing)
This comparative example is a variation on the basis of example 2, specifically S4: glazing the surface of the green body in the following manner:
s41: adding a solvent into glaze and adhesive to prepare mixed glaze;
s42: the mixed glaze is then coated on the green body.
The adhesive is carboxymethyl cellulose.
Comparative example 3
The comparison example is a change on the basis of the example 2, and specifically comprises the steps of entering a kiln for sintering, wherein the sintering process comprises the steps of 25-100 ℃ for 1h, 100-700 ℃ for 3h, 700-1250 ℃ for 3h and 1250-1300 ℃ for 1.5h, and cooling to obtain the porcelain body.
Comparative example 4
The comparison example is a change on the basis of the example 2, and specifically comprises the steps of entering a kiln for sintering, wherein the sintering process comprises the steps of sintering at 25-80 ℃ for 0.5h, sintering at 80-100 ℃ for 0.5h, sintering at 100-700 ℃ for 3h, sintering at 700-1000 ℃ for 3h, sintering at 1000-1250 ℃ for 2h and sintering at 1250-1300 ℃ for 1.5h, and cooling to obtain the porcelain body. The cooling method is that firstly, the temperature is reduced at a speed of 200 ℃/h from the sintering temperature of 1250 ℃ to the room temperature.
The performance test method of the porcelain body prepared by the preparation method comprises the following steps:
(1) testing the bending strength of the fine ceramic by a testing method GB/T6569-2006;
(2) the apparent porosity and volume density test method of the ceramic body is referred to QB/T1642-2012;
the test values are shown in Table 1;
| test specimen | Flexural Strength (MPa) | Apparent porosity (%) | Bulk Density (g/cm)3) |
| Example 1 | 182 | 0.082 | 2.78 |
| Example 2 | 185 | 0.075 | 2.88 |
| Example 3 | 180 | 0.078 | 2.84 |
| Example 4 | 179 | 0.079 | 2.81 |
| Example 5 | 183 | 0.081 | 2.86 |
| Example 6 | 180 | 0.080 | 2.83 |
| Example 7 | 178 | 0.078 | 2.85 |
| Comparative example 1 | 152 | 0.112 | 2.12 |
| Comparative example 2 | 160 | 0.095 | 2.05 |
| Comparative example 3 | 142 | 0.132 | 2.11 |
| Comparative example 4 | 151 | 0.124 | 2.13 |
As can be seen from the above table, the properties of the porcelain bodies of examples 1-7 are superior to those of comparative examples 1-4, wherein the sample of example 2 has the best properties, the bending strength is as high as 185MPa, the apparent porosity is 0.075%, and the volume density is 2.88g/cm3In the case of comparative example 1, the amount of sodium tripolyphosphate added is larger than that in example 2, but the bending strength is lower than that in example 2, and the stress caused by the migration of sodium ions becomes the main influence factor of the bending strength of the porcelain body mainly when the amount of sodium tripolyphosphate exceeds a certain amount, so that the amount of sodium tripolyphosphate needs to be properly controlled, electrolyte particles are uniformly dispersed in the slurry and sufficiently adsorbed around the barren raw material particles and the clay raw material particles to form a "sticky film", and the green body is dried to form a "barren material-sticky film-barren material, clay-sticky film-barren material and clay-sticky film-clay" mutual combination system. The dried ceramic raw material is highly dispersed in a space network formed by the organic binder, the probability of contact between barren materials is reduced due to the dispersion and wrapping uniformity of electrolyte particles, the strength of the ceramic body is improved, and the mechanical strength of the ceramic body is maintained; on the other hand, the influence of stress generated by the migration of sodium ions on the strength of the sodium ions is reduced; compared with the traditional glazing mode (adding porcelain sand) of the embodiment 2, the traditional glazing mode adopted by the comparative example 2 has the advantages that the performance of the glaze is higher than that of the comparative example 2, the porcelain sand is added into the glaze, so that the friction force of the surface of a green body is increased, the bonding force between the mixed glaze and the green body is enhanced, meanwhile, during sintering, the porcelain sand is melted on the surface of the green body, and the glaze layer is melted on the surface of the porcelain sand, so that the glaze layer of the porcelain body is more uniform and compact and is not easy to peel off from the porcelain body; the sintering mode of the comparative example 3 is different from that of the example 2, and the example 2 adopts a multi-temperature section for sintering, so that the green body slowly loses water at the temperature of 25-80 ℃ and 80-100 ℃, and part of organic matters are volatilized; the extent of the reaction at each temperature stage is as follows:
at the temperature of 100 ℃ and 700 ℃, the moisture of the green body is completely removed, and meanwhile, the volatilization, decomposition and oxidation of organic matters are gradually completed, so that the cracking of the green body caused by too fast volatilization of the organic matters is avoided;
700 ℃ and 1000 ℃, the organic matter is completely volatilized, liquid phase is not generated in the blank, the crystal grains are simply contacted and are not mutually bonded, and the blank is not sintered and shrunk;
the temperature is 1000-1250 ℃, 1250-1300 ℃, crystal grains in the blank body start to shift and bond, the liquid phase quantity also starts to generate, and the shrinkage at the stage is larger; thereby well controlling the stable transformation of the ceramic crystal phase and improving the performance of the ceramic body;
compared with the cooling mode of the comparative example 4, the cooling mode adopted by the invention can effectively ensure that the liquid phase has sufficient time to absorb the stress generated in the process of converting the liquid phase into the solid phase and separating out and converting crystals at a proper temperature; thus, after the porcelain body is cooled, no residual stress exists in the porcelain body, and no cracking or other defects are generated.
Therefore, due to the control of the sample raw materials and the process conditions, the ceramic body has low apparent porosity and excellent volume density and bending strength performance.
The above embodiments only describe the best mode of use of the existing device, and similar common means are used to replace the elements in the present embodiments, which fall into the protection scope.
Claims (8)
1. The utility model provides a high strength aluminium matter porcelain insulator porcelain body which characterized in that: comprises the following raw materials in parts by weight: 20-25 parts of mullite, 50-60 parts of clay, 5-20 parts of talc, 5-10 parts of kaolinite, 10-15 parts of silica powder, 20-30 parts of quartz, 10-15 parts of industrial alumina powder, 0.1-1 part of sodium tripolyphosphate and 300 parts of 100-substituted water;
the preparation method also comprises the following steps:
s0: mixing mullite, clay, talc, kaolinite, silica powder, quartz and industrial alumina powder, grinding, removing iron and sieving to prepare a raw material;
s1: dissolving sodium tripolyphosphate in water, and uniformly stirring to obtain a mixed solvent;
s2: stirring the raw materials, and adding the mixed solvent into the raw materials by adopting a spraying method while stirring to obtain slurry;
s3: drying the slurry at 30-40 ℃ for 0.5-1h, and then drying at 40-50 ℃ for 1-2h, wherein the water content of the dried slurry is controlled at 5-10%; pugging and injection molding to obtain a green body;
s4: glazing the surface of the green body, sintering in a kiln, and cooling to obtain a porcelain body; the cooling method in S4 is that the temperature is first reduced from 1250 ℃ to 980 ℃ and 1020 ℃ at a temperature reduction speed of 100-200 ℃/h; then reducing the temperature from 980 ℃ to 770 ℃ at a cooling rate of 30-50 ℃/h, and keeping the temperature for 1-2 h; then reducing the temperature from 770-800 ℃ to 750-800 ℃ at a cooling speed of 20-30 ℃/h; keeping the temperature for 2-3 h; then reducing the temperature from 750-800 ℃ to 550-560 ℃ at a temperature reduction speed of 20-30 ℃/h; finally, the temperature is reduced from 550 ℃ to 560 ℃ to room temperature at the temperature reduction speed of 20-40 ℃/h.
2. The method for preparing the high-strength aluminum porcelain insulator porcelain body according to claim 1, characterized in that: the particle size of the raw material in S0 is 100-300 meshes, wherein the proportion of particles with the particle size of 150-200 meshes is 60-80%, the proportion of particles with the particle size of 100-150 meshes is 10-20%, and the balance is particles with the particle size of 200-300 meshes.
3. The method for preparing the high-strength aluminum porcelain insulator porcelain body according to claim 1, characterized in that: the stirring speed of the stirring in S2 is 800-1200 r/min.
4. The method for preparing the high-strength aluminum porcelain insulator porcelain body according to claim 1, characterized in that: the sintering process in S4 is 25-80 ℃ for 0.5-1h, 80-100 ℃ for 0.5-1h, 100-700 ℃ for 2-3h, 700-1000 ℃ for 2-3h, 1000-1250 ℃ for 2-3h, and 1250-1300 ℃ for 1.5-3 h.
5. The method for preparing the high-strength aluminum porcelain insulator porcelain body according to claim 1, characterized in that: the glazing manner of the glazing in S4 is as follows:
s41: adding porcelain sand, glaze and adhesive into a solvent to prepare mixed glaze;
s42: the mixed glaze is then coated on the green body.
6. The method for preparing the high-strength aluminum porcelain insulator porcelain body according to claim 5, characterized in that: the adhesive is carboxymethyl cellulose or polyurethane.
7. The method for preparing the high-strength aluminum porcelain insulator porcelain body according to claim 6, characterized in that: the glaze comprises the following raw materials in parts by weight: 3-10 parts of silica sol, 1-4 parts of methylsilane, 15-25 parts of acetic acid and 75-90 parts of propanol.
8. The method for preparing the high-strength aluminum porcelain insulator porcelain body according to claim 5, characterized in that: the mass ratio of the porcelain sand, the glaze, the adhesive and the solvent is (3-5): (3-5): (0.1-1): 10.
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| CN113035472A (en) * | 2021-04-01 | 2021-06-25 | 萍乡明鑫电瓷成套有限公司 | Preparation method of toughened rod-shaped porcelain insulator |
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