CN116120096A - Composite ceramic rod and preparation method and application thereof - Google Patents
Composite ceramic rod and preparation method and application thereof Download PDFInfo
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- CN116120096A CN116120096A CN202211642767.5A CN202211642767A CN116120096A CN 116120096 A CN116120096 A CN 116120096A CN 202211642767 A CN202211642767 A CN 202211642767A CN 116120096 A CN116120096 A CN 116120096A
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- 239000000919 ceramic Substances 0.000 title claims abstract description 82
- 239000002131 composite material Substances 0.000 title claims abstract description 54
- 238000002360 preparation method Methods 0.000 title abstract description 23
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 65
- 239000011248 coating agent Substances 0.000 claims abstract description 39
- 238000000576 coating method Methods 0.000 claims abstract description 39
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 claims abstract description 38
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 24
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 23
- HYXGAEYDKFCVMU-UHFFFAOYSA-N scandium oxide Chemical compound O=[Sc]O[Sc]=O HYXGAEYDKFCVMU-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000002904 solvent Substances 0.000 claims abstract description 18
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000010453 quartz Substances 0.000 claims abstract description 16
- 239000002994 raw material Substances 0.000 claims abstract description 15
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 claims abstract description 11
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910001928 zirconium oxide Inorganic materials 0.000 claims abstract description 10
- 239000000853 adhesive Substances 0.000 claims abstract description 6
- 230000001070 adhesive effect Effects 0.000 claims abstract description 6
- 238000005245 sintering Methods 0.000 claims description 30
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 20
- 239000002245 particle Substances 0.000 claims description 18
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 12
- 239000011230 binding agent Substances 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 7
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 7
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 5
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 5
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 5
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 239000011268 mixed slurry Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 3
- 230000000052 comparative effect Effects 0.000 description 17
- 238000000498 ball milling Methods 0.000 description 9
- RUDFQVOCFDJEEF-UHFFFAOYSA-N yttrium(III) oxide Inorganic materials [O-2].[O-2].[O-2].[Y+3].[Y+3] RUDFQVOCFDJEEF-UHFFFAOYSA-N 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 239000006004 Quartz sand Substances 0.000 description 3
- 239000011247 coating layer Substances 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 229910021193 La 2 O 3 Inorganic materials 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000007569 slipcasting Methods 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 239000005995 Aluminium silicate Substances 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000007799 cork Substances 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 239000010431 corundum Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000009740 moulding (composite fabrication) Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
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- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
- C04B41/81—Coating or impregnation
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
- C04B35/111—Fine ceramics
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- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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Abstract
The invention discloses a composite ceramic rod, a preparation method and application thereof, and belongs to the technical field of ceramic rods; the ceramic rod comprises a quartz ceramic rod body and a coating; the coating is prepared from the following raw materials in parts by weight: 85 to 88 percent of alumina, 3 to 4 percent of silicon dioxide, 0.15 to 0.3 percent of yttrium oxide, 1 to 2 percent of zirconium oxide, 0.2 to 0.4 percent of scandium oxide, 0.2 to 0.3 percent of lanthanum oxide, 0.2 to 0.3 percent of adhesive and the balance of solvent. The ceramic rod provided by the invention is prepared by reasonably matching and selecting the preparation raw materials, so that the ceramic rod with high compressive strength is prepared.
Description
Technical Field
The invention belongs to the technical field of ceramic rods, and particularly relates to a composite ceramic rod, and a preparation method and application thereof.
Background
The ceramic rod is made of clay refractory material and natural mineral material through the processes of selection, crushing, mixing, forming, calcining, etc.
The main raw materials for producing the ceramic rod in the related art comprise kaolin, refractory clay, refractory corundum aggregate and alpha-Al 2 O 3 Etc. However, the ceramic rod has the flexural strength and the compressive strength which can be along with the temperature at a higher temperatureIs lowered by the rise of (c).
Accordingly, the present invention provides a composite ceramic rod having high compressive strength.
Disclosure of Invention
The present invention is directed to a composite ceramic rod that addresses at least one of the problems and shortcomings set forth in the background art discussed above.
The invention also provides a preparation method of the composite ceramic rod.
The invention also provides application of the composite ceramic rod.
In particular, the first aspect of the invention provides a composite ceramic rod comprising a quartz ceramic rod body and a coating;
the coating is prepared from the following raw materials in parts by weight:
85 to 88 percent of alumina, 3 to 4 percent of silicon dioxide, 0.15 to 0.3 percent of yttrium oxide, 1 to 2 percent of zirconium oxide, 0.2 to 0.4 percent of scandium oxide, 0.2 to 0.3 percent of lanthanum oxide, 0.2 to 0.3 percent of adhesive and the balance of solvent.
According to one of the technical schemes of the composite ceramic rod, the composite ceramic rod at least has the following beneficial effects:
according to the invention, the coating is arranged on the quartz ceramic rod body, so that the quartz ceramic rod body can be well protected, and a high-strength composite ceramic rod is finally formed; the coating of the invention can also improve the high temperature resistance of the composite ceramic rod, and the composite ceramic rod has higher strength above 1000 ℃.
The aluminum oxide is added into the preparation raw materials of the coating, and the mechanical strength, the wear resistance, the corrosion resistance and the thermal stability of the aluminum oxide are high, so that the high-strength performance of the coating is endowed.
The silicon dioxide has the characteristics of good wear resistance, high hardness and small thermal expansion coefficient, thereby improving the mechanical property of the coating.
According to the invention, the fusion degree between the alumina and the silica is improved by adding the yttrium oxide, the zirconium oxide, the scandium oxide and the lanthanum oxide, so that the compactness of the coating is improved, and the strength of the coating is further improved.
According to some embodiments of the invention, the compressive strength of the composite ceramic rod is 120MPa or more at 1350 ℃.
According to some embodiments of the invention, the compressive strength of the composite ceramic rod is 120MPa to 140MPa at 1350 ℃.
According to some embodiments of the invention, the compressive strength of the composite ceramic rod is 130MPa to 140MPa at 1350 ℃.
According to some embodiments of the invention, the compressive strength of the composite ceramic rod is 130MPa to 136MPa at 1350 ℃.
According to some embodiments of the invention, the compressive strength of the composite ceramic rod is 135MPa to 136MPa at 1350 ℃.
According to some embodiments of the invention, the binder is carboxymethyl cellulose.
The carboxymethyl cellulose can fully disperse the metal oxide in the slurry, and can also prevent the problem of sedimentation of large-size metal oxide particles, so as to prepare a coating material with uniform distribution; thereby improving the high-temperature compressive strength of the ceramic rod.
According to some embodiments of the invention, the solvent is an aqueous ethanol solution.
According to some embodiments of the invention, the mass fraction of the aqueous ethanol solution is 50% -70%.
According to some embodiments of the invention, the mass fraction of the aqueous ethanol solution is 60% -70%.
The invention realizes the full dispersion of the carboxymethyl cellulose by controlling the mass fraction of the ethanol aqueous solution.
According to some embodiments of the invention, the alumina has a particle size (D50) of 3 μm to 5 μm.
According to some embodiments of the invention, the silica has a particle size (D50) of 0.04 μm to 0.06 μm.
According to some embodiments of the invention, the silica has a particle size (D50) of 0.045 μm to 0.055 μm.
According to some embodiments of the invention, the yttria has a particle size (D50) of 0.5 μm to 3 μm.
According to some embodiments of the invention, the yttria has a particle size (D50) of 0.5 μm to 1 μm.
According to some embodiments of the invention, the zirconia has a particle size (D50) of 0.5 μm to 1 μm.
According to some embodiments of the invention, the zirconia has a particle size (D50) of 0.5 μm to 0.8 μm.
According to some embodiments of the invention, the scandium oxide has a particle size (D50) of 0.1 μm to 0.5 μm.
According to some embodiments of the invention, the scandium oxide has a particle size (D50) of 0.2 μm to 0.5 μm.
According to some embodiments of the invention, the lanthanum oxide has a particle size (D50) of 0.08 μm to 0.8 μm.
According to some embodiments of the invention, the lanthanum oxide has a particle size (D50) of 0.08 μm to 0.5 μm.
According to the invention, the particle size of different oxides is controlled, so that the finally formed coating structure is controlled, and the control of the high-temperature compression resistance of the composite ceramic rod is realized.
According to some embodiments of the invention, the thickness of the coating is 0.5mm to 0.8mm.
According to some embodiments of the invention, the thickness of the coating is 0.5mm to 0.6mm.
Too thin a coating layer can cause the uniformity of the coating layer on the quartz ceramic rod body to be affected; thus affecting the final compressive strength of the ceramic rod, while an excessive thickness of the coating layer can lead to the quartz ceramic rod body, the second aspect of the invention provides a preparation method of the composite ceramic rod, which comprises the following steps:
s1, mixing the aluminum oxide, the silicon dioxide, the yttrium oxide, the zirconium oxide, the scandium oxide, the lanthanum oxide, the adhesive and the solvent to prepare mixed slurry;
s2, coating the mixed slurry on the surface of the quartz ceramic rod body, drying and sintering;
the sintering comprises a first-stage sintering, a second-stage sintering and a third-stage sintering;
the temperature of the second-stage sintering is 1100-1150 ℃.
According to some embodiments of the invention, the first stage sintering temperature is 600 ℃ to 700 ℃.
According to some embodiments of the invention, the first stage sintering time is 1h to 2h.
According to some embodiments of the invention, the second stage sintering time is 3h to 5h.
According to some embodiments of the invention, the temperature of the third stage sintering is 1200 ℃ to 1250 ℃.
According to some embodiments of the invention, the third stage sintering time is 0.5h to 1.5h.
According to some embodiments of the invention, the quartz ceramic rod body is prepared from quartz sand.
According to some embodiments of the invention, the quartz ceramic rod body is prepared by slip casting using quartz sand.
According to some embodiments of the invention, the mixing in step S1 is ball milling.
According to some embodiments of the invention, the ball-milling mixture has a ball-to-material ratio of 1:1 to 2.
According to some embodiments of the invention, the ball milling speed of the ball milling mixture is 100rpm to 120rpm.
According to some embodiments of the invention, the ball milling mixing time is 8h to 10h.
According to some embodiments of the invention, the drying temperature is 70 ℃ to 90 ℃.
According to some embodiments of the invention, the drying time is from 5 hours to 10 hours.
The third aspect of the invention provides an application of the composite ceramic rod in preparing a ceramic roller rod.
Detailed Description
The conception and the technical effects produced by the present invention will be clearly and completely described in conjunction with the embodiments below to fully understand the objects, features and effects of the present invention. It is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments, and that other embodiments obtained by those skilled in the art without inventive effort are within the scope of the present invention based on the embodiments of the present invention.
In the description of the present invention, the descriptions of the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The specific conditions are not noted in the examples and are carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or apparatus used were conventional products commercially available without the manufacturer's attention.
Alumina: sumitomo AM-210, particle size 5 μm.
Silica: HN-SP50, particle size 45 nm-55 nm, of Hangzhou Hengna New materials Co.
Yttria: shanghai Shaoshi Seawi nanotechnology Co., ltd 2 O 3 -500 (D50 is 0.5 μm), XH-Y 2 O 3 -001 (D50 is 1 μm), XH-Y 2 O 3 -003 (D50 is 3 μm).
Zirconia: shanghai Shaozhi nanotechnology Co.Ltd 2 -200 (D50 is 0.5 μm), XH-ZrO 2 -300 (D50 is 0.8 μm), XH-ZrO 2 -001 (D50 is 1 μm).
Scandium oxide: scandium oxide (D50 is 100nm, 200nm and 500 nm) from Beijing, cork, utility sciences.
Lanthanum oxide: shanghai Shaoshi Seawi nanotechnology Co., ltd 2 O 3 80 (D50 is 80 nm), XH-La 2 O 3 -500 (D50 is 500 nm), XH-La 2 O 3 -800 (D50 is 800 nm).
Example 1
The embodiment is a composite ceramic rod, which consists of a quartz ceramic rod body and a coating;
in the embodiment, the quartz ceramic rod body is prepared from quartz sand through slip casting.
The coating in this example consisted of the following preparation materials:
88% of alumina (D50 of 5 μm), 4% of silica (D50 of 45nm to 55 nm), 0.3% of yttria (D50 of 1 μm), 2% of zirconia (D50 of 0.8 μm), 0.4% of scandium oxide (D50 of 0.2 μm), 0.3% of lanthanum oxide (D50 of 0.5 μm), 0.3% of binder and the balance of solvent.
In this example, the binder was carboxymethyl cellulose (CAS number 9000-11-7).
The solvent in this example was an aqueous ethanol solution (60% by volume).
The thickness of the coating in this example was 0.6mm.
The preparation method of the composite ceramic rod in the embodiment comprises the following steps:
s1, mixing aluminum oxide, silicon dioxide, yttrium oxide, zirconium oxide, scandium oxide, lanthanum oxide, an adhesive and a solvent to prepare mixed slurry;
in the step, the mixing is ball milling mixing, and the ball material ratio of the ball milling mixing is 1:2; ball milling speed is 100rpm; ball milling and mixing for 8 hours;
s2, coating the step S1 on the surface of the quartz ceramic rod body, drying and sintering;
the drying temperature in the step is 80 ℃, and the drying time is 10 hours;
the sintering in the step comprises a first-stage sintering, a second-stage sintering and a third-stage sintering;
the temperature of the first-stage sintering in the step is 650 ℃, and the time of the first-stage sintering is 1h;
the second-stage sintering temperature in the step is 1150 ℃, and the second-stage sintering time is 4 hours;
the temperature of the third sintering stage in the step is 1250 ℃, and the time of the third sintering stage is 1h;
the temperature rising speed from 25 ℃ to 650 ℃ in the step is 3 ℃/min;
the temperature rising speed from 650 ℃ to 1150 ℃ in the step is 20 ℃/min;
the temperature rising speed from 1150 ℃ to 1250 ℃ in the step is 2 ℃/min;
and in the step, naturally cooling after the third-stage sintering is finished.
Example 2
This example is a composite ceramic rod, which differs from example 1 in that:
the coating in this example consists of the following preparation raw materials in weight fraction:
88% of alumina (D50 of 5 μm), 4% of silica (D50 of 45nm to 55 nm), 0.3% of yttria (D50 of 1 μm), 2% of zirconia (D50 of 0.8 μm), 0.4% of scandium oxide (D50 of 0.1 μm), 0.3% of lanthanum oxide (D50 of 0.5 μm), 0.3% of binder and the balance of solvent.
The method for producing the composite ceramic rod of this example was carried out as described in example 1.
Example 3
This example is a composite ceramic rod, which differs from example 1 in that:
the coating in this example consists of the following preparation raw materials in weight fraction:
88% of alumina (D50 of 5 μm), 4% of silica (D50 of 45nm to 55 nm), 0.3% of yttria (D50 of 1 μm), 2% of zirconia (D50 of 0.8 μm), 0.4% of scandium oxide (D50 of 0.5 μm), 0.3% of lanthanum oxide (D50 of 0.5 μm), 0.3% of binder and the balance of solvent.
The method for producing the composite ceramic rod of this example was carried out as described in example 1.
Example 4
This example is a composite ceramic rod, which differs from example 1 in that:
the coating in this example consists of the following preparation raw materials in weight fraction:
88% of alumina (D50 of 5 μm), 4% of silica (D50 of 45nm to 55 nm), 0.3% of yttria (D50 of 1 μm), 2% of zirconia (D50 of 0.8 μm), 0.4% of scandium oxide (D50 of 0.5 μm), 0.3% of lanthanum oxide (D50 of 0.8 μm), 0.3% of binder and the balance of solvent.
The method for producing the composite ceramic rod of this example was carried out as described in example 1.
Example 5
This example is a composite ceramic rod, which differs from example 1 in that:
the coating in this example consists of the following preparation raw materials in weight fraction:
88% of alumina (D50 of 5 μm), 4% of silica (D50 of 45nm to 55 nm), 0.3% of yttria (D50 of 1 μm), 2% of zirconia (D50 of 0.8 μm), 0.4% of scandium oxide (D50 of 0.5 μm), 0.3% of lanthanum oxide (D50 of 0.08 μm), 0.3% of binder and the balance of solvent.
The method for producing the composite ceramic rod of this example was carried out as described in example 1.
Comparative example 1
This comparative example is a composite ceramic rod, and differs from example 1 in that:
the coating in the comparative example consists of the following preparation raw materials in parts by weight:
88% of alumina (D50 of 5 μm), 4% of silica (D50 of 45nm to 55 nm), 2% of zirconia (D50 of 0.8 μm), 0.4% of scandium oxide (D50 of 0.2 μm), 0.3% of lanthanum oxide (D50 of 0.5 μm), 0.3% of binder and the balance of solvent.
The preparation method of the composite ceramic rod in this comparative example was carried out as described in example 1.
Comparative example 2
This comparative example is a composite ceramic rod, and differs from example 1 in that:
the coating in the comparative example consists of the following preparation raw materials in parts by weight:
88% of alumina (D50 of 5 μm), 4% of silica (D50 of 45nm to 55 nm), 0.3% of yttrium oxide (D50 of 1 μm), 0.4% of scandium oxide (D50 of 0.2 μm), 0.3% of lanthanum oxide (D50 of 0.5 μm), 0.3% of binder and the balance of solvent.
The preparation method of the composite ceramic rod in this comparative example was carried out as described in example 1.
Comparative example 3
This comparative example is a composite ceramic rod, and differs from example 1 in that:
the coating in the comparative example consists of the following preparation raw materials in parts by weight:
88% of alumina (D50 of 5 μm), 4% of silica (D50 of 45nm to 55 nm), 0.3% of yttrium oxide (D50 of 1 μm), 2% of zirconium oxide (D50 of 0.8 μm), 0.3% of lanthanum oxide (D50 of 0.5 μm), 0.3% of binder and the balance of solvent.
The preparation method of the composite ceramic rod in this comparative example was carried out as described in example 1.
Comparative example 4
This comparative example is a composite ceramic rod, and differs from example 1 in that:
the coating in this example consists of the following preparation raw materials in weight fraction:
88% of alumina (D50 of 5 μm), 4% of silica (D50 of 45nm to 55 nm), 0.3% of yttrium oxide (D50 of 1 μm), 2% of zirconium oxide (D50 of 0.8 μm), 0.4% of scandium oxide (D50 of 0.2 μm), 0.3% of binder and the balance of solvent.
The preparation method of the composite ceramic rod in this comparative example was carried out as described in example 1.
The test methods of compressive strength of the composite ceramic rods produced in examples 1 to 5 and comparative examples 1 to 4 of the present invention were carried out with reference to GB/T4740-1999, and the test results are shown in Table 1.
Table 1 compressive strength test results of composite ceramic rods produced in examples 1 to 5 and comparative examples 1 to 4 of the present invention
In summary, according to the invention, the coating is arranged on the quartz ceramic rod body, so that the quartz ceramic rod body can be well protected, and a high-strength composite ceramic rod is finally formed; the coating of the invention can also improve the high temperature resistance of the composite ceramic rod, and the composite ceramic rod has higher strength above 1000 ℃. The aluminum oxide is added into the preparation raw materials of the coating, and the mechanical strength, the wear resistance, the corrosion resistance and the thermal stability of the aluminum oxide are high, so that the high-strength performance of the coating is endowed. The silicon dioxide has the characteristics of good wear resistance, high hardness and small thermal expansion coefficient, thereby improving the mechanical property of the coating. According to the invention, the fusion degree between the alumina and the silica is improved by adding the yttrium oxide, the zirconium oxide, the scandium oxide and the lanthanum oxide, so that the compactness of the coating is improved, and the strength of the coating is further improved.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, and various modifications and variations can be made to the embodiments of the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
While the foregoing is directed to embodiments of the present invention, other and further details of the invention may be had by the present invention, it should be understood that the foregoing description is merely illustrative of the present invention and that no limitations are intended to the scope of the invention, except insofar as modifications, equivalents, improvements or modifications are within the spirit and principles of the invention.
Claims (10)
1. The composite ceramic rod is characterized by comprising a quartz ceramic rod body and a coating;
the coating is prepared from the following raw materials in parts by weight:
85 to 88 percent of alumina, 3 to 4 percent of silicon dioxide, 0.15 to 0.3 percent of yttrium oxide, 1 to 2 percent of zirconium oxide, 0.2 to 0.4 percent of scandium oxide, 0.2 to 0.3 percent of lanthanum oxide, 0.2 to 0.3 percent of adhesive and the balance of solvent.
2. The composite ceramic rod of claim 1, wherein the binder is carboxymethyl cellulose.
3. The composite ceramic rod of claim 1, wherein the solvent is an aqueous ethanol solution.
4. The composite ceramic rod of claim 1, wherein the alumina has a particle size of 3-5 μm.
5. The composite ceramic rod of claim 1, wherein the silica has a particle size of 0.04 μm to 0.06 μm.
6. The composite ceramic rod of claim 1, wherein the zirconia has a particle size of 0.5 μm to 1 μm.
7. The composite ceramic rod of claim 1, wherein the coating has a thickness of 0.5mm to 0.8mm.
8. A method of preparing a composite ceramic rod according to any one of claims 1 to 7, comprising the steps of:
s1, mixing the aluminum oxide, the silicon dioxide, the yttrium oxide, the zirconium oxide, the scandium oxide, the lanthanum oxide, the adhesive and the solvent to prepare mixed slurry;
s2, coating the mixed slurry on the surface of the quartz ceramic rod body, drying and sintering;
the sintering comprises a first-stage sintering, a second-stage sintering and a third-stage sintering;
the temperature of the second-stage sintering is 1100-1150 ℃.
9. The method of claim 8, wherein the first stage sintering is at a temperature of 600 ℃ to 700 ℃.
10. Use of a composite ceramic rod according to any one of claims 1 to 7 for the manufacture of a ceramic roller rod.
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| EP0816305A1 (en) * | 1996-07-03 | 1998-01-07 | Shera-Werkstofftechnologie Gmbh | Binder-free coating for refractory ceramics |
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| CN111378828A (en) * | 2018-12-29 | 2020-07-07 | 江苏亚太特种铸钢厂有限公司 | High-stability hearth roll |
| CN111574235A (en) * | 2020-04-29 | 2020-08-25 | 新沂市正达高新石英材料有限公司 | High-temperature-resistant quartz ceramic roller and preparation method thereof |
| WO2022154936A2 (en) * | 2020-12-18 | 2022-07-21 | Heraeus Conamic North America Llc | Plasma resistant yttrium aluminum oxide chamber components |
| US20220242796A1 (en) * | 2019-04-11 | 2022-08-04 | Axiom Materials, Inc. | Surface treatments for ceramic coated/impregnated materials |
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| EP0816305A1 (en) * | 1996-07-03 | 1998-01-07 | Shera-Werkstofftechnologie Gmbh | Binder-free coating for refractory ceramics |
| CN1566028A (en) * | 2003-07-01 | 2005-01-19 | 广东佛陶集团金刚新材料有限公司 | Single layer peelable coating for ceramic roller bar and obtained ceramic roller bar |
| CN111378828A (en) * | 2018-12-29 | 2020-07-07 | 江苏亚太特种铸钢厂有限公司 | High-stability hearth roll |
| US20220242796A1 (en) * | 2019-04-11 | 2022-08-04 | Axiom Materials, Inc. | Surface treatments for ceramic coated/impregnated materials |
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| WO2022154936A2 (en) * | 2020-12-18 | 2022-07-21 | Heraeus Conamic North America Llc | Plasma resistant yttrium aluminum oxide chamber components |
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