CN114716253A - Method for preparing ceramic rotor by taking rare earth oxide as sintering aid - Google Patents
Method for preparing ceramic rotor by taking rare earth oxide as sintering aid Download PDFInfo
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- CN114716253A CN114716253A CN202210274379.XA CN202210274379A CN114716253A CN 114716253 A CN114716253 A CN 114716253A CN 202210274379 A CN202210274379 A CN 202210274379A CN 114716253 A CN114716253 A CN 114716253A
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- 239000000919 ceramic Substances 0.000 title claims abstract description 49
- 238000005245 sintering Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 23
- 229910001404 rare earth metal oxide Inorganic materials 0.000 title claims abstract description 17
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 29
- 239000003365 glass fiber Substances 0.000 claims abstract description 28
- 239000004744 fabric Substances 0.000 claims abstract description 25
- 239000011248 coating agent Substances 0.000 claims abstract description 21
- 238000000576 coating method Methods 0.000 claims abstract description 21
- -1 rare earth modified cerium phosphate Chemical class 0.000 claims abstract description 18
- 239000000945 filler Substances 0.000 claims abstract description 14
- 239000002131 composite material Substances 0.000 claims abstract description 13
- 208000016261 weight loss Diseases 0.000 claims abstract description 12
- 239000013585 weight reducing agent Substances 0.000 claims abstract description 10
- 239000000853 adhesive Substances 0.000 claims abstract description 8
- 230000001070 adhesive effect Effects 0.000 claims abstract description 8
- 238000003763 carbonization Methods 0.000 claims abstract description 4
- 238000005229 chemical vapour deposition Methods 0.000 claims abstract description 4
- 238000002156 mixing Methods 0.000 claims abstract description 4
- 238000012856 packing Methods 0.000 claims abstract description 4
- 239000000843 powder Substances 0.000 claims abstract description 4
- 229920006337 unsaturated polyester resin Polymers 0.000 claims abstract description 4
- 238000006243 chemical reaction Methods 0.000 claims abstract description 3
- 239000007789 gas Substances 0.000 claims description 15
- 239000002245 particle Substances 0.000 claims description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- 238000000151 deposition Methods 0.000 claims description 8
- 230000001681 protective effect Effects 0.000 claims description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- 239000011324 bead Substances 0.000 claims description 6
- 230000008021 deposition Effects 0.000 claims description 6
- 238000007667 floating Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- 238000005553 drilling Methods 0.000 claims description 5
- 238000011049 filling Methods 0.000 claims description 5
- 238000003672 processing method Methods 0.000 claims description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- 238000003801 milling Methods 0.000 claims description 4
- 238000005498 polishing Methods 0.000 claims description 4
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- 235000012239 silicon dioxide Nutrition 0.000 claims description 4
- 238000007514 turning Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 229910052684 Cerium Inorganic materials 0.000 claims description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 3
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 claims description 3
- 239000008367 deionised water Substances 0.000 claims description 3
- 229910021641 deionized water Inorganic materials 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 239000000428 dust Substances 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- 239000001257 hydrogen Substances 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 3
- 239000003921 oil Substances 0.000 claims description 3
- 238000010079 rubber tapping Methods 0.000 claims description 3
- 229910052724 xenon Inorganic materials 0.000 claims description 3
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 claims description 3
- 229910052786 argon Inorganic materials 0.000 claims description 2
- 229910000281 calcium bentonite Inorganic materials 0.000 claims description 2
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 239000010451 perlite Substances 0.000 claims description 2
- 235000019362 perlite Nutrition 0.000 claims description 2
- 239000002253 acid Substances 0.000 abstract description 5
- 239000003513 alkali Substances 0.000 abstract description 4
- 238000005452 bending Methods 0.000 abstract description 3
- 239000003292 glue Substances 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000002360 preparation method Methods 0.000 abstract description 2
- 229910010293 ceramic material Inorganic materials 0.000 description 9
- 150000002910 rare earth metals Chemical class 0.000 description 8
- 239000000126 substance Substances 0.000 description 6
- 239000000956 alloy Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 229910001069 Ti alloy Inorganic materials 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 229910000856 hastalloy Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000004580 weight loss Effects 0.000 description 2
- 229910001928 zirconium oxide Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000012847 fine chemical Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 235000013599 spices Nutrition 0.000 description 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 1
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- 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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/10—Coating
- C03C25/1095—Coating to obtain coated fabrics
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/10—Coating
- C03C25/12—General methods of coating; Devices therefor
- C03C25/22—Deposition from the vapour phase
- C03C25/223—Deposition from the vapour phase by chemical vapour deposition or pyrolysis
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/10—Coating
- C03C25/42—Coatings containing inorganic materials
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/10—Coating
- C03C25/48—Coating with two or more coatings having different compositions
- C03C25/52—Coatings containing inorganic materials only
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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
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/62204—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products using waste materials or refuse
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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
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/64—Burning or sintering processes
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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
- C04B35/71—Ceramic products containing macroscopic reinforcing agents
- C04B35/78—Ceramic products containing macroscopic reinforcing agents containing non-metallic materials
- C04B35/80—Fibres, filaments, whiskers, platelets, or the like
- C04B35/82—Asbestos; Glass; Fused silica
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2205—Conventional flow pattern
- F04D29/2222—Construction and assembly
- F04D29/2227—Construction and assembly for special materials
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- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- 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
- C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
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- C04B2235/52—Constituents or additives characterised by their shapes
- C04B2235/5208—Fibers
- C04B2235/5252—Fibers having a specific pre-form
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B2235/9669—Resistance against chemicals, e.g. against molten glass or molten salts
- C04B2235/9692—Acid, alkali or halogen resistance
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Abstract
The invention relates to the technical field of composite material preparation, in particular to a method for preparing a ceramic rotor by taking rare earth oxide as a sintering aid, which is characterized by comprising the following steps of: laying several layers of reaction sinks in advance in ceramic rotor mouldEmbedding low-density weight-reducing fillers among layers of the glass fiber cloth with the rare earth modified cerium phosphate coating, coating composite glue for fixation, and sintering to obtain a ceramic rotor blank; the composite adhesive is prepared by uniformly mixing unsaturated polyester resin and ceramic powder; the rare earth modified cerium phosphate coating is obtained by adopting a chemical vapor deposition method on the surface of glass fiber cloth and then is subjected to high-temperature carbonization treatment; low-density weight-reduction packings are filled in the hole grooves formed by the multiple layers of glass fiber cloth. Compared with the prior art, the invention has the beneficial effects that: the ceramic rotor has bending strength not lower than 15MPa, acid resistance not lower than 98%, alkali resistance not lower than 99%, and thermal expansion coefficient<5.46×10‑6/K。
Description
Technical Field
The invention relates to the technical field of composite material preparation, in particular to a method for preparing a ceramic rotor by taking rare earth oxide as a sintering aid.
Background
With the rapid rise of science and technology, the ceramic technology plays an important role in the field of material science and is an important component of high technology. At present, various precision ceramic materials are widely used in high-tech products. The ceramic material has the characteristics of high strength, high hardness, resistance to corrosion of various acids and hydrofluoric acid, wear resistance, high temperature resistance, light specific gravity and the like. Has been widely applied to the fields of aerospace, aviation, ships, machinery, nuclear industry, petroleum, chemical industry, automobiles, scientific research, national defense, military and the like. In particular, silicon carbide, silicon nitride, zirconium oxide and composite materials thereof are widely applied to bearings of various pumps on magnetic drive ceramic pumps, canned motor pumps and chemical pumps, and the performance of the composite materials is higher than that of non-metallic materials such as graphite, tungsten carbide, aluminum oxide and the like.
The pump is produced by ceramic materials such as silicon carbide, silicon nitride, zirconium oxide, aluminum oxide and the like, and can be used for replacing pumps produced by special alloy materials such as stainless steel pumps, titanium alloy pumps, Hastelloy pumps and the like in the market. Compared with the special alloy, the ceramic material has a large price space, the cost has a large price space compared with the special alloy materials such as the titanium alloy, the Hastelloy and the like, the forming mode is simple and convenient, and the ceramic material is suitable for large-scale mass production.
The development of the novel pump ceramic material has become a hotspot of world high and new technology application, particularly the introduction and addition of rare earth materials, so that the toughness, the shock resistance and the reliability of the ceramic material are greatly improved, and the wide application of the ceramic material in the industry is realized. The ceramic rotor body of the existing cam pump is mostly a solid sintered body, and the ceramic rotor body has the advantages of easy processing, and has the defects of heavy parts, large rotor moment of inertia, high energy consumption, large material consumption and high product cost, and the popularization and the application of the product are influenced.
Disclosure of Invention
The invention aims to provide a method for preparing a ceramic rotor by taking rare earth oxide as a sintering aid, which overcomes the defects of the prior art, adopts a combined structure of glass fiber cloth and a low-density weight-reducing filler, and is additionally provided with a rare earth modified cerium phosphate coating, so that the ceramic rotor not only has the cost advantage, but also has excellent performance, is especially suitable for mass production occasions, and is suitable for the current trend of ceramic industry development.
In order to achieve the purpose, the invention is realized by the following technical scheme:
the method for preparing the ceramic rotor by taking the rare earth oxide as the sintering aid is characterized by comprising the following steps of: paving a plurality of layers of glass fiber cloth with a rare earth modified cerium phosphate coating deposited in advance in a reaction mode in a ceramic rotor mould, enabling the included angle of the fiber direction between every two adjacent layers to be 45-90 degrees, embedding a low-density weight-reducing filler between every two adjacent layers, coating a composite adhesive for fixing, and sintering to obtain a ceramic rotor blank; the composite adhesive is prepared by uniformly mixing unsaturated polyester resin and ceramic powder; the rare earth modified cerium phosphate coating is obtained by adopting a chemical vapor deposition method on the surface of the glass fiber cloth and then is subjected to high-temperature carbonization treatment; the low-density weight-reduction packing is filled in a hole groove formed by a plurality of layers of glass fiber cloth.
The rare earth modified cerium phosphate coating is obtained by multiple steps of gas deposition and drying on the surface of glass fiber, wherein the molar ratio of rare earth elements to gamma cerium elements in the rare earth modified cerium phosphate coating is 20-25: 100; the gas deposition temperature is 500-630 ℃, and the oxygen partial pressure is not higher than 0.05 standard atmosphere; the protective gas is hydrogen or nitrogen.
The sintering temperature is 860-980 ℃; the sintering treatment time is 4-8 h; the sintering treatment is carried out by adopting protective gas for protection, and the oxygen partial pressure is controlled to be 0.12-0.14 standard atmospheric pressure; the shielding gas comprises xenon or argon.
The low-density weight-reducing filler has the particle size of 0.2-3 mm, wherein the particle size of 45-55 wt% is 0.75-1.8 mm, the particle size of 15-35 wt% is greater than 1.8mm, the particle size of 20-30 wt% is less than 0.75mm, and the low-density weight-reducing filler is fully stirred with the compound adhesive before filling.
Before depositing the rare earth modified cerium phosphate coating on the surface of the glass fiber cloth, the glass fiber cloth needs to be subjected to heat treatment, so that a 2-micron silicon dioxide layer is formed on the surface of the glass fiber cloth.
The low-density weight-reducing filler is any one of perlite, floating beads and calcium bentonite.
The glass fiber cloth needs to remove dust and oil stains on the surface before heat treatment, and is washed for 3-5 times by deionized water with the temperature of more than 65 ℃.
The ceramic rotor blank also needs to enable the size and the surface quality to meet requirements through a mechanical processing method, wherein the mechanical processing method comprises any one or any combination of more than two of turning, grinding, milling, drilling, tapping and polishing.
Compared with the prior art, the invention has the beneficial effects that: 1) the rare earth oxide is used as a sintering aid to prepare rare earth ceramic, the toughness of the rare earth ceramic is improved, the process parameters are optimized, the method is suitable for preparing a large-size rare earth ceramic pump with the caliber of more than 20 inches, and the rare earth ceramic pump can be widely applied to various industrial fields of biological pharmacy, medicament solvent addition, printing ink, photography, food, intelligent household kitchenware, beverage filling, cosmetic filling, fine chemical engineering, chemical raw materials, spice, cooling liquid conveying, military science and technology, aviation, aerospace, automobiles, high-speed rails, motor cars, machine tools and the like. 2) The material is non-toxic, non-magnetic, non-conductive, wear-resistant, resistant to corrosion of various chemicals, acid-resistant and alkali-resistant, achieves the use condition in special environment, and promotes the development of the rare earth ceramic pump to the high-end and green direction. 3) Various pump products such as a magnetic pump, a shield pump, a chemical pump and the like which are produced by adopting ceramic materials can replace pumps produced by special alloy materials such as a stainless steel pump, a titanium alloy pump, a Hastelloy alloy pump and the like on the market, and have a large price space. 4) The forming mode is simple and convenient, and is suitable for large-scale production. 5) The ceramic rotor has bending strength not less than 15MPa, acid resistance not less than 98%, alkali resistance not less than 99% and thermal expansion coefficient less than 5.46X 10-6/K.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural view of an embodiment of a ceramic rotor according to the present invention;
FIG. 2 is a schematic view of the cavity lay-up of a mold for use with embodiments of the present invention;
FIG. 3 is a schematic process flow diagram according to an embodiment of the present invention.
In the figure: 1-a ceramic rotor mold; 2-a mold core; 3-glass fiber cloth; 4-low density weight loss tampons.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.
Referring to fig. 1-3, which are schematic structural diagrams of embodiments of the present invention for preparing a ceramic rotor by using rare earth oxide as a sintering aid, the method specifically comprises: in a ceramic rotor mould 1, a core 2 is arranged in the middle, a plurality of layers of glass fiber cloth 3 which is reacted and deposited with rare earth modified cerium phosphate coating in advance are laid in a cavity, the included angle of the fiber direction between every two adjacent layers is 60 degrees, low-density weight-reducing fillers 4 are embedded between every two adjacent layers, and are coated with compound glue for fixation, and a ceramic rotor blank is obtained through sintering treatment; the composite adhesive is prepared by uniformly mixing unsaturated polyester resin and ceramic powder; the rare earth modified cerium phosphate coating is obtained by adopting a chemical vapor deposition method on the surface of glass fiber cloth and then is subjected to high-temperature carbonization treatment; low-density weight-reduction packings are filled in the hole grooves formed by the multiple layers of glass fiber cloth. The rare earth modified cerium phosphate coating is obtained by multiple steps of gas deposition and drying on the surface of glass fiber, and the molar ratio of rare earth elements to gamma cerium elements in the rare earth modified cerium phosphate coating is 23: 100; the gas deposition temperature is 580 ℃, and the oxygen partial pressure is not higher than 0.05 standard atmosphere; the protective gas is hydrogen. Before depositing the rare earth modified cerium phosphate coating on the surface of the glass fiber cloth, the glass fiber cloth needs to be subjected to heat treatment, so that a 2-micron silicon dioxide layer is formed on the surface of the glass fiber cloth. Before heat treatment, the glass fiber cloth needs to remove dust and oil stains on the surface and is washed for 3-5 times by deionized water with the temperature of more than 65 ℃. The sintering temperature is 890 ℃; the sintering time is 6 h; the sintering treatment adopts protective gas for protection, and the oxygen partial pressure is controlled to be 0.13 standard atmospheric pressure; the protective gas is xenon.
In an embodiment, the low density weight reducing plugs are floating beads. The floating bead is a fly ash hollow sphere which can float on the water surface, is grey white, has thin and hollow wall, light weight, 620kg/m3 volume weight, closed and smooth surface, small heat conductivity and refractoriness more than or equal to 1610 ℃, is an excellent heat-insulating refractory material, and is widely used for the production of light castable and the aspect of petroleum drilling. The chemical components of the floating bead mainly comprise silicon dioxide and aluminum oxide, and the floating bead has the characteristics of fine particles, hollowness, light weight, high strength, wear resistance, high temperature resistance, heat insulation, flame retardance and the like. The particle size distribution in the low density weight loss tampons was as follows: the particle size of 55 weight percent is 0.75-1.8 mm, the particle size of 20 weight percent is more than 1.8mm, the particle size of 25 weight percent is less than 0.75mm, and the composite glue is required to be fully stirred before filling.
The sintered and molded ceramic rotor blank is further processed by a mechanical processing method to ensure that the size and the surface quality of the ceramic rotor blank meet the requirements, wherein the processing comprises any one or combination of more than two of turning, grinding, milling, drilling, tapping and polishing, and in the embodiment, the steps of turning inner holes, drilling, milling key grooves, polishing the surface and the like are required. The embodiment of the invention uses rare earth oxide as a sintering aid to prepare rare earth ceramic, increases the toughness, optimizes the process parameters, and is suitable for preparing a large-size rare earth ceramic pump with the caliber of more than 20 inches, wherein the bending strength of a ceramic rotor is more than or equal to 15Mpa, the acid resistance is more than or equal to 98 percent, the alkali resistance is more than or equal to 99 percent, the thermal expansion coefficient is less than 5.46 multiplied by 10 < -6 >/K, and the performance is excellent.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (8)
1. The method for preparing the ceramic rotor by taking the rare earth oxide as the sintering aid is characterized by comprising the following steps of: paving a plurality of layers of glass fiber cloth with a rare earth modified cerium phosphate coating deposited in advance in a reaction mode in a ceramic rotor mould, enabling the included angle of the fiber direction between every two adjacent layers to be 45-90 degrees, embedding a low-density weight-reducing filler between every two adjacent layers, coating a composite adhesive for fixing, and sintering to obtain a ceramic rotor blank; the composite adhesive is prepared by uniformly mixing unsaturated polyester resin and ceramic powder; the rare earth modified cerium phosphate coating is obtained by adopting a chemical vapor deposition method on the surface of the glass fiber cloth and then is subjected to high-temperature carbonization treatment; the low-density weight-reduction packing is filled in a hole groove formed by a plurality of layers of glass fiber cloth.
2. The method for preparing the ceramic rotor by taking the rare earth oxide as the sintering aid according to claim 1, wherein the rare earth modified cerium phosphate coating is obtained by multiple steps of gas deposition and drying on the surface of a glass fiber, and the molar ratio of rare earth elements to gamma cerium elements in the rare earth modified cerium phosphate coating is 20-25: 100; the gas deposition temperature is 500-630 ℃, and the oxygen partial pressure is not higher than 0.05 standard atmosphere; the protective gas is hydrogen or nitrogen.
3. The method for preparing the ceramic rotor by taking the rare earth oxide as the sintering aid according to claim 1, wherein the sintering temperature is 860-980 ℃; the sintering treatment time is 4-8 h; the sintering treatment is carried out by adopting protective gas for protection, and the oxygen partial pressure is controlled to be 0.12-0.14 standard atmospheric pressure; the shielding gas comprises xenon or argon.
4. The method for preparing a ceramic rotor by using rare earth oxide as a sintering aid according to claim 1, wherein the particle size of the low-density weight-reduction filler is 0.2-3 mm, wherein 45-55% by weight of the low-density weight-reduction filler has a particle size of 0.75-1.8 mm, 15-35% by weight of the low-density weight-reduction filler has a particle size of >1.8mm, and 20-30% by weight of the low-density weight-reduction filler has a particle size of <0.75mm, and the low-density weight-reduction filler is fully stirred with a composite adhesive before filling.
5. The method for preparing a ceramic rotor by using rare earth oxide as a sintering aid as claimed in claim 1, wherein the surface of the glass fiber cloth is subjected to heat treatment before the rare earth modified cerium phosphate coating is deposited, so that a 2-micron silicon dioxide layer is formed on the surface of the glass fiber cloth.
6. The method for preparing a ceramic rotor using rare earth oxide as a sintering aid according to claim 1, wherein the low-density weight-reduction filler is any one of perlite, floating beads and calcium bentonite.
7. The method for preparing the ceramic rotor by using the rare earth oxide as the sintering aid according to claim 5, wherein the glass fiber cloth is required to remove dust and oil stains on the surface before heat treatment, and is cleaned for 3-5 times by deionized water with the temperature of more than 65 ℃.
8. The method for preparing a ceramic rotor by using rare earth oxide as a sintering aid according to claim 1, wherein the ceramic rotor blank is required to meet the requirements on size and surface quality by a mechanical processing method, and the mechanical processing method comprises any one or any combination of more than two of turning, grinding, milling, drilling, tapping and polishing.
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| BE802207A (en) * | 1972-10-12 | 1973-11-05 | Litvak Meir | Hollow glass fibre/polyester articles - by partly curing glass fibre/polyester layer adding liquid polyester, and curin |
| JPH0732380A (en) * | 1993-07-19 | 1995-02-03 | Hitachi Kasei Mold Kk | Glass fiber-reinforced unsaturated polyester resin light-weight molding and manufacture thereof |
| CN106394576A (en) * | 2016-08-30 | 2017-02-15 | 济南大学 | Composite interior wallboard with sandwich hollow fabric and preparation method of composite interior wallboard |
| CN109968757A (en) * | 2019-04-22 | 2019-07-05 | 中国人民解放军国防科技大学 | Ablation-resistant light heat-proof heat-insulation integrated composite material and preparation method thereof |
| CN112125704A (en) * | 2020-09-23 | 2020-12-25 | 广东省科学院新材料研究所 | Silicon carbide fiber material with rare earth modified lanthanum phosphate coating and preparation method and application thereof |
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2022
- 2022-03-18 CN CN202210274379.XA patent/CN114716253A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE802207A (en) * | 1972-10-12 | 1973-11-05 | Litvak Meir | Hollow glass fibre/polyester articles - by partly curing glass fibre/polyester layer adding liquid polyester, and curin |
| JPH0732380A (en) * | 1993-07-19 | 1995-02-03 | Hitachi Kasei Mold Kk | Glass fiber-reinforced unsaturated polyester resin light-weight molding and manufacture thereof |
| CN106394576A (en) * | 2016-08-30 | 2017-02-15 | 济南大学 | Composite interior wallboard with sandwich hollow fabric and preparation method of composite interior wallboard |
| CN109968757A (en) * | 2019-04-22 | 2019-07-05 | 中国人民解放军国防科技大学 | Ablation-resistant light heat-proof heat-insulation integrated composite material and preparation method thereof |
| CN112125704A (en) * | 2020-09-23 | 2020-12-25 | 广东省科学院新材料研究所 | Silicon carbide fiber material with rare earth modified lanthanum phosphate coating and preparation method and application thereof |
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