CN111377720A - High-temperature-resistant low-expansion ceramic material and preparation method thereof - Google Patents
High-temperature-resistant low-expansion ceramic material and preparation method thereof Download PDFInfo
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Abstract
The invention belongs to the technical field of ceramic preparation, and particularly relates to a high-temperature-resistant low-expansion ceramic material and a manufacturing method thereof. The high-temperature-resistant low-expansion ceramic material provided by the invention comprises fused quartz silica micropowder, cordierite, spodumene, clay, calcined talc, titanium dioxide, barium sulfate, magnesium oxide, silicon nitride, polyethylene glycol, polyacrylamide, ammonium persulfate, tetramethylethylenediamine, water and the like, and is prepared by a 5-step method. The high-temperature-resistant low-expansion ceramic material has high strength, low thermal expansion coefficient and smooth and flat surface, can resist the large-range rapid change of the external temperature without cracking, and can be well suitable for long-term use in various harsh environments such as a ceramic roller way of a glass tempering furnace, a ceramic roller way of a silicon steel annealing furnace, a ceramic roller way of a metal heat treatment furnace and the like. The manufacturing method of the high-temperature-resistant low-expansion ceramic material provided by the invention is simple and convenient to operate, stable in product quality and suitable for efficient manufacturing of medium-batch high-temperature-resistant low-expansion ceramic materials.
Description
Technical Field
The invention belongs to the technical field of ceramic preparation, and particularly relates to a high-temperature-resistant low-expansion ceramic material and a manufacturing method thereof.
Background
The glass toughening furnace is key equipment for producing toughened glass, and the glass is heated at high temperature and then cooled in the toughening furnace to form a unique stress distribution state with the interior pulled and the exterior pressed. Once the glass is locally damaged, stress release occurs, the glass is broken into a plurality of small blocks without sharp edges and corners, and the glass is not easy to cause injury to people, so that the glass is widely used. The ceramic roller is used as a key part of the glass tempering furnace, is used for bearing and conveying glass, is required to bear high temperature without deformation, can bear large-range temperature change without cracking, and is also required to have the characteristics of high strength, smooth and flat surface and the like. However, the existing common ceramic material has large thermal expansion coefficient and limited strength, and is easy to generate cracks when used for a long time under extreme conditions similar to a glass toughening furnace, so that the service life is short, and the comprehensive cost is high.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a high-temperature-resistant low-expansion ceramic material and a manufacturing method thereof. The high-temperature-resistant low-expansion ceramic material comprises the following components in parts by weight:
70-80 parts of fused quartz silica powder
10-15 parts of cordierite
2-5 parts of spodumene
1-2 parts of clay
1-2 parts of calcined talc
2-3 parts of titanium dioxide
2-3 parts of barium sulfate
2-3 parts of magnesium oxide
0.5 to 0.8 portion of silicon nitride
0.8-1.2 parts of polyethylene glycol
0.3 to 0.5 portion of polyacrylamide
0.2 to 0.3 portion of ammonium persulfate
0.1 to 0.3 portion of tetramethyl ethylene diamine
80-120 parts of water.
Preferably, the particle size of the fused silica micro powder is 150-180 meshes.
Preferably, the average molecular weight of the polyethylene glycol is 190-210.
Further, the manufacturing method of the high temperature resistant low expansion ceramic material comprises the following steps:
s1: uniformly mixing polyacrylamide, ammonium persulfate, tetramethylethylenediamine and water according to the formula amount;
s2: putting fused quartz silica micropowder, cordierite, spodumene, clay, calcined talc, titanium dioxide, barium sulfate, magnesium oxide, silicon nitride and the product obtained in the step S1 into a ball mill according to the formula ratio, ball-milling uniformly, and sieving with a 200-mesh sieve;
s3: carrying out spray granulation on the slurry obtained in the step S2, and sieving the slurry with a 200-mesh sieve;
s4: putting the powder obtained in the step S3 into a die for static pressure forming;
s5: and (4) conveying the pressed green body into a kiln for sintering and molding.
Preferably, in the above manufacturing method of the high temperature resistant low expansion ceramic material, in step S2, the ball mill uses a zirconia ball mill pot and zirconia balls, the amount of the zirconia balls is 2.5 times of the amount of all the components, the rotation speed of the ball mill is 360r/min, and the ball milling time is 2 hours.
Preferably, in the above manufacturing method of the high temperature resistant low expansion ceramic material, in step S3, the inlet temperature of hot air is set to 220 ℃, the outlet temperature is set to 120 ℃, the slurry flow rate is set to 35kg/h, and the speed of the atomizer is adjusted to 25 Hz.
Preferably, in the above manufacturing method of the high temperature resistant low expansion ceramic material, in step S4, the pressure is 10MPa, and the pressure is maintained for 60S.
Preferably, in the manufacturing method of the high temperature resistant low expansion ceramic material, in step S5, the temperature is set as follows: heating from room temperature to 1200 ℃ at the speed of 5 ℃/min, preserving the heat for 3h, and naturally cooling.
Preferably, in the manufacturing method of the high temperature resistant low expansion ceramic material, in step S5, the temperature is set as follows: heating from room temperature to 320 ℃ at the speed of 2 ℃/min, preserving heat for 2h, heating from 320 ℃ to 1200 ℃ at the speed of 5 ℃/min, preserving heat for 3h, and naturally cooling.
Has the advantages that: the high-temperature-resistant low-expansion ceramic material provided by the invention has the advantages of high strength, low thermal expansion coefficient and smooth and flat surface, can resist the large-range rapid change of the external temperature without cracking, and can be well suitable for long-term use in various harsh environments such as a ceramic roller way of a glass tempering furnace, a ceramic roller way of a silicon steel annealing furnace, a ceramic roller way of a metal heat treatment furnace and the like. The manufacturing method of the high-temperature-resistant low-expansion ceramic material provided by the invention is simple and convenient to operate, stable in product quality and suitable for efficient manufacturing of medium-batch high-temperature-resistant low-expansion ceramic materials.
Detailed Description
Example 1
A high temperature resistant low expansion ceramic material comprises the following components by weight:
fused silica micropowder 70 parts
15 portions of cordierite
Spodumene 5 parts
1 part of clay
1 part of calcined talc
2 portions of titanium dioxide
2 portions of barium sulfate
2 portions of magnesium oxide
0.5 part of silicon nitride
0.8 part of polyethylene glycol
0.3 part of polyacrylamide
0.2 part of ammonium persulfate
0.1 part of tetramethylethylenediamine
80 parts of water.
In this embodiment, the particle size of the fused silica micro powder is 150 meshes; the average molecular weight of the polyethylene glycol is 190-210.
In this embodiment, the high temperature resistant low expansion ceramic material is manufactured by the following steps:
s1: uniformly mixing polyacrylamide, ammonium persulfate, tetramethylethylenediamine and water according to the formula amount;
s2: putting fused quartz silica micropowder, cordierite, spodumene, clay, calcined talc, titanium dioxide, barium sulfate, magnesium oxide, silicon nitride and the product obtained in the step S1 into a ball mill according to the formula ratio, ball-milling uniformly, and sieving with a 200-mesh sieve;
s3: carrying out spray granulation on the slurry obtained in the step S2, and sieving the slurry with a 200-mesh sieve;
s4: putting the powder obtained in the step S3 into a die for static pressure forming;
s5: and (4) conveying the pressed green body into a kiln for sintering and molding.
In this embodiment, in step S2, the ball mill uses a zirconia ball mill pot and zirconia balls, the amount of the zirconia balls is 2.5 times of the amount of all the components, the rotation speed of the ball mill is 360r/min, and the ball milling time is 2 hours.
In this embodiment, in step S3, the inlet temperature of hot air is set to 220 ℃, the outlet temperature is set to 120 ℃, the slurry flow rate is set to 35kg/h, and the speed of the atomizer is adjusted to 25 Hz.
In this example, in step S4, the pressure was maintained at 10MPa for 60 seconds.
In this embodiment, in step S5, the temperature is set to: heating from room temperature to 1200 ℃ at the speed of 5 ℃/min, preserving the heat for 3h, and naturally cooling.
Example 2
A high temperature resistant low expansion ceramic material comprises the following components by weight:
80 parts of fused silica micropowder
10 portions of cordierite
Spodumene 2 parts
2 portions of clay
2 parts of calcined talc
Titanium dioxide 3 parts
Barium sulfate 3 parts
3 portions of magnesium oxide
0.8 part of silicon nitride
Polyethylene glycol 1.2 parts
0.5 part of polyacrylamide
0.3 part of ammonium persulfate
0.3 part of tetramethylethylenediamine
120 parts of water.
In this embodiment, the particle size of the fused silica micro powder is 180 meshes; the average molecular weight of the polyethylene glycol is 190-210.
In this embodiment, the high temperature resistant low expansion ceramic material is manufactured by the following steps:
s1: uniformly mixing polyacrylamide, ammonium persulfate, tetramethylethylenediamine and water according to the formula amount;
s2: putting fused quartz silica micropowder, cordierite, spodumene, clay, calcined talc, titanium dioxide, barium sulfate, magnesium oxide, silicon nitride and the product obtained in the step S1 into a ball mill according to the formula ratio, ball-milling uniformly, and sieving with a 200-mesh sieve;
s3: carrying out spray granulation on the slurry obtained in the step S2, and sieving the slurry with a 200-mesh sieve;
s4: putting the powder obtained in the step S3 into a die for static pressure forming;
s5: and (4) conveying the pressed green body into a kiln for sintering and molding.
In this embodiment, in step S2, the ball mill uses a zirconia ball mill pot and zirconia balls, the amount of the zirconia balls is 2.5 times of the amount of all the components, the rotation speed of the ball mill is 360r/min, and the ball milling time is 2 hours.
In this embodiment, in step S3, the inlet temperature of hot air is set to 220 ℃, the outlet temperature is set to 120 ℃, the slurry flow rate is set to 35kg/h, and the speed of the atomizer is adjusted to 25 Hz.
In this example, in step S4, the pressure was maintained at 10MPa for 60 seconds.
In this embodiment, in step S5, the temperature is set to: heating from room temperature to 320 ℃ at the speed of 2 ℃/min, preserving heat for 2h, heating from 320 ℃ to 1200 ℃ at the speed of 5 ℃/min, preserving heat for 3h, and naturally cooling.
Example 3
A high temperature resistant low expansion ceramic material comprises the following components by weight:
75 parts of fused silica micropowder
12 portions of cordierite
Spodumene 4 parts
2 portions of clay
1 part of calcined talc
Titanium dioxide 3 parts
Barium sulfate 3 parts
3 portions of magnesium oxide
0.8 part of silicon nitride
Polyethylene glycol 1 part
0.5 part of polyacrylamide
0.2 part of ammonium persulfate
0.2 part of tetramethylethylenediamine
105 parts of water.
In this embodiment, the particle size of the fused silica micro powder is 180 meshes; the average molecular weight of the polyethylene glycol is 190-210.
In this embodiment, the high temperature resistant low expansion ceramic material is manufactured by the following steps:
s1: uniformly mixing polyacrylamide, ammonium persulfate, tetramethylethylenediamine and water according to the formula amount;
s2: putting fused quartz silica micropowder, cordierite, spodumene, clay, calcined talc, titanium dioxide, barium sulfate, magnesium oxide, silicon nitride and the product obtained in the step S1 into a ball mill according to the formula ratio, ball-milling uniformly, and sieving with a 200-mesh sieve;
s3: carrying out spray granulation on the slurry obtained in the step S2, and sieving the slurry with a 200-mesh sieve;
s4: putting the powder obtained in the step S3 into a die for static pressure forming;
s5: and (4) conveying the pressed green body into a kiln for sintering and molding.
In this embodiment, in step S2, the ball mill uses a zirconia ball mill pot and zirconia balls, the amount of the zirconia balls is 2.5 times of the amount of all the components, the rotation speed of the ball mill is 360r/min, and the ball milling time is 2 hours.
In this embodiment, in step S3, the inlet temperature of hot air is set to 220 ℃, the outlet temperature is set to 120 ℃, the slurry flow rate is set to 35kg/h, and the speed of the atomizer is adjusted to 25 Hz.
In this example, in step S4, the pressure was maintained at 10MPa for 60 seconds.
In this embodiment, in step S5, the temperature is set to: heating from room temperature to 320 ℃ at the speed of 2 ℃/min, preserving heat for 2h, heating from 320 ℃ to 1200 ℃ at the speed of 5 ℃/min, preserving heat for 3h, and naturally cooling.
Example 4
A high temperature resistant low expansion ceramic material comprises the following components by weight:
75 parts of fused silica micropowder
12 portions of cordierite
Spodumene 2 parts
1 part of clay
1 part of calcined talc
Titanium dioxide 3 parts
2 portions of barium sulfate
3 portions of magnesium oxide
0.8 part of silicon nitride
Polyethylene glycol 1.2 parts
0.3 part of polyacrylamide
0.3 part of ammonium persulfate
0.3 part of tetramethylethylenediamine
105 parts of water.
In this embodiment, the particle size of the fused silica micro powder is 180 meshes; the average molecular weight of the polyethylene glycol is 190-210.
In this embodiment, the high temperature resistant low expansion ceramic material is manufactured by the following steps:
s1: uniformly mixing polyacrylamide, ammonium persulfate, tetramethylethylenediamine and water according to the formula amount;
s2: putting fused quartz silica micropowder, cordierite, spodumene, clay, calcined talc, titanium dioxide, barium sulfate, magnesium oxide, silicon nitride and the product obtained in the step S1 into a ball mill according to the formula ratio, ball-milling uniformly, and sieving with a 200-mesh sieve;
s3: carrying out spray granulation on the slurry obtained in the step S2, and sieving the slurry with a 200-mesh sieve;
s4: putting the powder obtained in the step S3 into a die for static pressure forming;
s5: and (4) conveying the pressed green body into a kiln for sintering and molding.
In this embodiment, in step S2, the ball mill uses a zirconia ball mill pot and zirconia balls, the amount of the zirconia balls is 2.5 times of the amount of all the components, the rotation speed of the ball mill is 360r/min, and the ball milling time is 2 hours.
In this embodiment, in step S3, the inlet temperature of hot air is set to 220 ℃, the outlet temperature is set to 120 ℃, the slurry flow rate is set to 35kg/h, and the speed of the atomizer is adjusted to 25 Hz.
In this example, in step S4, the pressure was maintained at 10MPa for 60 seconds.
In this embodiment, in step S5, the temperature is set to: heating from room temperature to 320 ℃ at the speed of 2 ℃/min, preserving heat for 2h, heating from 320 ℃ to 1200 ℃ at the speed of 5 ℃/min, preserving heat for 3h, and naturally cooling.
Comparative example 1
The main component fused silica powder was replaced with the same amount of kaolin, and the other components and the production method were completely the same as in example 4.
Comparative example 2
The main component fused silica powder was replaced with petalite in the same amount, and the other components and the production method were completely the same as in example 4.
Comparative example 3
The tetramethylethylenediamine was removed from the components, and the other components and the production method were completely the same as in example 4.
Comparative example 4
Ammonium persulfate was removed from the components, and the other components and the manufacturing method were completely the same as those of example 4.
Comparative example 5
The polyacrylamide was removed from the components, and the other components and the production method were exactly the same as in example 4.
The high temperature resistant low expansion ceramic materials obtained in examples 1 to 4 and the ceramic products obtained in comparative examples 1 to 5 were subjected to performance tests including a thermal expansion coefficient of 20-800 ℃, a bending strength, and a rapid cooling and heating test (hydrothermal exchange) at 800-20 ℃, as detailed in table 1.
TABLE 1
In table 1, it can be seen from examples 1 to 4 that the high temperature resistant low expansion ceramic material provided by the present invention has very excellent comprehensive properties, low thermal expansion coefficient, large bending strength, and can endure a wide range of rapid temperature changes without cracking, wherein the comprehensive properties of example 4 are the best. It was found by comparison of comparative examples 1 and 2 that the matrix component of the ceramic material has a significant effect on the overall properties, and that even if the other components and auxiliaries are used identically, the excellent overall properties are not achievable without the matrix component as a basis. In addition, it was found by comparison of comparative examples 3 to 5 that a suitable auxiliary also has a very important role, and that the synergistic cooperation of a plurality of auxiliaries with each other is another key factor for achieving excellent performance.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the present invention, and these modifications should also be construed as the protection scope of the present invention.
Claims (9)
1. A high temperature resistant low expansion ceramic material, characterized in that: comprises the following components by weight:
70-80 parts of fused quartz silica powder
10-15 parts of cordierite
2-5 parts of spodumene
1-2 parts of clay
1-2 parts of calcined talc
2-3 parts of titanium dioxide
2-3 parts of barium sulfate
2-3 parts of magnesium oxide
0.5 to 0.8 portion of silicon nitride
0.8-1.2 parts of polyethylene glycol
0.3 to 0.5 portion of polyacrylamide
0.2 to 0.3 portion of ammonium persulfate
0.1 to 0.3 portion of tetramethyl ethylene diamine
80-120 parts of water.
2. The high temperature resistant low expansion ceramic material of claim 1, wherein: the granularity of the fused silica micro powder is 150-180 meshes.
3. The high temperature resistant low expansion ceramic material of claim 1, wherein: the average molecular weight of the polyethylene glycol is 190-210.
4. The method for manufacturing high temperature resistant low expansion ceramic material according to any of claims 1-3, wherein: the method comprises the following steps:
s1: uniformly mixing polyacrylamide, ammonium persulfate, tetramethylethylenediamine and water according to the formula amount;
s2: putting fused quartz silica micropowder, cordierite, spodumene, clay, calcined talc, titanium dioxide, barium sulfate, magnesium oxide, silicon nitride and the product obtained in the step S1 into a ball mill according to the formula ratio, ball-milling uniformly, and sieving with a 200-mesh sieve;
s3: carrying out spray granulation on the slurry obtained in the step S2, and sieving the slurry with a 200-mesh sieve;
s4: putting the powder obtained in the step S3 into a die for static pressure forming;
s5: and (4) conveying the pressed green body into a kiln for sintering and molding.
5. The method for manufacturing high temperature resistant low expansion ceramic material according to claim 4, wherein: in step S2, the ball mill uses a zirconia ball-milling pot and zirconia balls, the dosage of the zirconia balls is 2.5 times of the dosage of all the components, the rotating speed of the ball mill is 360r/min, and the ball-milling time is 2 h.
6. The method for manufacturing high temperature resistant low expansion ceramic material according to claim 4, wherein: in step S3, the inlet temperature of hot air is set to 220 ℃, the outlet temperature is set to 120 ℃, the slurry flow is set to 35kg/h, and the speed of the atomizer is adjusted to 25 Hz.
7. The method for manufacturing high temperature resistant low expansion ceramic material according to claim 4, wherein: in step S4, the pressure is maintained at 10MPa for 60S.
8. The method for manufacturing high temperature resistant low expansion ceramic material according to claim 4, wherein: in step S5, the temperature is set to: heating from room temperature to 1200 ℃ at the speed of 5 ℃/min, preserving the heat for 3h, and naturally cooling.
9. The method for manufacturing high temperature resistant low expansion ceramic material according to claim 4, wherein: in step S5, the temperature is set to: heating from room temperature to 320 ℃ at the speed of 2 ℃/min, preserving heat for 2h, heating from 320 ℃ to 1200 ℃ at the speed of 5 ℃/min, preserving heat for 3h, and naturally cooling.
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