CN116477932A - Magnesium composite material with high thermal shock stability and preparation method thereof - Google Patents
Magnesium composite material with high thermal shock stability and preparation method thereof Download PDFInfo
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- 230000035939 shock Effects 0.000 title claims abstract description 33
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 229910052749 magnesium Inorganic materials 0.000 title claims abstract description 29
- 239000011777 magnesium Substances 0.000 title claims abstract description 29
- 239000002131 composite material Substances 0.000 title claims abstract description 23
- 238000002360 preparation method Methods 0.000 title abstract description 12
- 239000000843 powder Substances 0.000 claims abstract description 85
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 42
- 229910052839 forsterite Inorganic materials 0.000 claims abstract description 39
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 claims abstract description 37
- GNTDGMZSJNCJKK-UHFFFAOYSA-N divanadium pentaoxide Chemical compound O=[V](=O)O[V](=O)=O GNTDGMZSJNCJKK-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 19
- 238000002156 mixing Methods 0.000 claims abstract description 15
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 14
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910000420 cerium oxide Inorganic materials 0.000 claims abstract description 11
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000000203 mixture Substances 0.000 claims abstract description 4
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims abstract description 3
- 238000003825 pressing Methods 0.000 claims abstract description 3
- 229910001928 zirconium oxide Inorganic materials 0.000 claims abstract description 3
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 20
- 239000002994 raw material Substances 0.000 claims description 16
- 239000002002 slurry Substances 0.000 claims description 16
- 238000005507 spraying Methods 0.000 claims description 9
- 238000000498 ball milling Methods 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 3
- 239000000919 ceramic Substances 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 229910052744 lithium Inorganic materials 0.000 abstract description 3
- 239000002243 precursor Substances 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000011031 large-scale manufacturing process Methods 0.000 abstract description 2
- 239000007774 positive electrode material Substances 0.000 abstract description 2
- 238000005245 sintering Methods 0.000 abstract description 2
- 235000012245 magnesium oxide Nutrition 0.000 description 15
- 239000012071 phase Substances 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 7
- 239000011819 refractory material Substances 0.000 description 5
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- 239000002893 slag Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000011449 brick Substances 0.000 description 2
- 238000000748 compression moulding Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 229910052720 vanadium Inorganic materials 0.000 description 2
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 2
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- -1 magnesium aluminum vanadium Chemical compound 0.000 description 1
- 229910001425 magnesium ion Inorganic materials 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052609 olivine Inorganic materials 0.000 description 1
- 239000010450 olivine Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 238000001694 spray drying Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- LSGOVYNHVSXFFJ-UHFFFAOYSA-N vanadate(3-) Chemical compound [O-][V]([O-])([O-])=O LSGOVYNHVSXFFJ-UHFFFAOYSA-N 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
- C04B35/16—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 silicates other than clay
- C04B35/20—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 silicates other than clay rich in magnesium oxide, e.g. forsterite
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
- C04B35/03—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 magnesium oxide, calcium oxide or oxide mixtures derived from dolomite
- C04B35/04—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 magnesium oxide, calcium oxide or oxide mixtures derived from dolomite based on magnesium oxide
- C04B35/053—Fine ceramics
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
- 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
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- 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
- C04B2235/3229—Cerium oxides or oxide-forming salts thereof
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- 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
- C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3239—Vanadium oxides, vanadates or oxide forming salts thereof, e.g. magnesium vanadate
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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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- 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
- C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3244—Zirconium oxides, zirconates, hafnium oxides, hafnates, or oxide-forming salts thereof
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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
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- C—CHEMISTRY; METALLURGY
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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
- C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient
Abstract
The invention discloses a magnesium composite phase material with high thermal shock stability and a preparation method thereof, the magnesium composite phase material is formed by uniformly mixing granular powder A and granular powder B and then mechanically pressing the mixture, wherein the granular powder A comprises 92-98% of magnesia fine powder, 2-8% of vanadium pentoxide fine powder, 2-4% of polyvinyl alcohol, 0.5-1% of cerium oxide fine powder and 40-50% of water according to weight percentage, and the granular powder B comprises 90-95% of forsterite fine powder, 5-10% of zirconium oxide fine powder, 2-4% of polyvinyl alcohol and 40-50% of water according to weight percentage, and the forsterite fine powder is recycled and has the characteristics of lower energy consumption, environmental protection and convenience for large-scale production; the prepared magnesium composite phase material with high thermal shock stability has high strength and good thermal shock stability, can be applied to kiln furniture fields such as sagger for sintering a precursor of a positive electrode material of a lithium battery, honeycomb ceramics and the like, and has wide application range.
Description
Technical Field
The invention relates to the technical field of refractory materials, in particular to a magnesium composite material with high thermal shock stability and a preparation method thereof.
Background
The forsterite has the characteristics of high melting point (1890 ℃), low heat conductivity coefficient, good metal melt and slag erosion resistance, stable high-temperature structure and the like, so that the Fang Meizhi refractory material taking the forsterite and periclase as main crystal phases has excellent high-temperature performance and slag erosion resistance and is mainly applied to the high-temperature industrial fields of glass, cement, steel and the like. However, due to the characteristics of high thermal expansion coefficients of the main crystal phases forsterite and periclase, the thermal shock stability of the magnesia refractory material is poor, and the application range of the magnesia refractory material is limited.
ZL02130040.2GO A magnesium aluminum vanadium refractory and a production method thereof are disclosed, wherein vanadium slag and magnesia are adopted to prepare an unburnt product, and the thermal shock stability of the product is improved by adding vanadium slag, but only magnesia is used in the aspect of magnesia material, so that the utilization of forsterite is not realized.
ZL201710725142.8 discloses a preparation method of a high-strength compact zirconia-forsterite composite material, and the composite material made of the forsterite material is prepared, but natural forsterite is not utilized, and high-cost raw materials are used in large quantity, so that the production cost is extremely high.
ZL95101212.6 discloses a forsterite brick and a production process thereof, and ZL200810049034.4 discloses a preparation method of a light forsterite raw material, so that the resource utilization of natural forsterite fine powder is realized, but the defect of poor stability of olivine Dan Rezhen is not overcome.
ZL201510223403.7 discloses a high-purity forsterite brick for a regenerator of a glass kiln, ZL201580008458.4 discloses a method for producing forsterite particles, CN201811084192.3 discloses a method for producing forsterite with high fire resistance, CN202111291187.1 discloses a periclase-forsterite high-temperature spray coating, and forsterite particles and a forsterite refractory material with good performance are produced by methods such as spray drying, but natural forsterite is not utilized.
ZL201310191815.8 discloses a forsterite sagger and a preparation method thereof, and the sagger for heat treatment of calcined alkaline pigment and lithium battery precursor materials in the ceramic industry is prepared by taking forsterite as a main raw material, but the sagger has a narrow application range and is not beneficial to realizing large-scale resource utilization of the forsterite.
ZL201110245710.7 discloses an electric melting forsterite and a preparation method thereof, and CN200910061248.8 discloses a preparation method of high-purity electric melting forsterite, which realizes high-efficiency comprehensive utilization of forsterite and fine powder thereof, but has high energy consumption in the melting process through an electric arc furnace in the production process.
Disclosure of Invention
First, the technical problem to be solved
In order to overcome the defects of the prior art, the magnesium composite material with high thermal shock resistance and the preparation method thereof are provided, and the prepared magnesium composite material with high thermal shock resistance has good thermal shock resistance and wide application range.
(II) technical scheme
The invention is realized by the following technical scheme: the invention provides a magnesium composite phase material with high thermal shock stability, which is formed by uniformly mixing granular powder A and granular powder B and then mechanically pressing the mixture, wherein the granular powder A comprises 92-98% of magnesia fine powder, 2-8% of vanadium pentoxide fine powder, 2-4% of polyvinyl alcohol, 0.5-1% of cerium oxide fine powder and 40-50% of water by weight percent, and the granular powder B comprises 90-95% of forsterite fine powder, 5-10% of zirconium oxide fine powder, 2-4% of polyvinyl alcohol and 40-50% of water by weight percent.
Further, the MgO content in the magnesia fine powder is more than or equal to 92 percent, and the grain diameter is less than or equal to 0.089mm.
Further, V in the vanadium pentoxide powder 2 O 5 The content is more than or equal to 97 percent and the grain diameter is less than or equal to 0.089mm.
Further, ceO in the cerium oxide fine powder 2 The content is more than or equal to 98 percent and the grain diameter is less than or equal to 0.05mm.
Further, the MgO content in the forsterite fine powder is more than or equal to 40%, the SiO2 content is more than or equal to 37%, the Fe2O3 content is less than or equal to 10%, and the particle size of the forsterite fine powder is less than or equal to 0.089mm.
Further, the ZrO2 content in the zirconia fine powder is more than or equal to 98wt%; the grain diameter of the zirconia fine powder is less than or equal to 0.02mm.
Further, the pressure intensity of the mechanical press molding is 40-50 MPa.
A preparation method of a magnesium complex phase material with high thermal shock stability comprises the following steps:
step 1: taking magnesia fine powder and vanadium pentoxide fine powder as raw materials, adding water, polyvinyl alcohol and cerium oxide fine powder for mixing, ball milling for 6-8 hours to obtain slurry, and then spraying and granulating the slurry to obtain granular powder A;
step 2: taking forsterite fine powder and zirconia fine powder as raw materials, adding water and polyvinyl alcohol, mixing, ball milling for 6-8 hours to obtain slurry, and then spraying and granulating the slurry to obtain granular powder B;
step 3: and (3) uniformly mixing the granular powder A prepared in the step (1) with the granular powder B prepared in the step (2), press-forming, preserving heat for 8-10 h at 1400-1450 ℃, and naturally cooling to obtain the magnesium complex phase material with high thermal shock stability.
(III) beneficial effects
Compared with the prior art, the invention has the following beneficial effects:
according to the magnesium composite material with high thermal shock stability and the preparation method thereof, the magnesium composite material with high thermal shock stability is prepared by taking the forsterite fine powder as a main raw material, so that the production cost is reduced, and the resource utilization of the forsterite fine powder is realized, so that the magnesium composite material is environment-friendly; the oxygen decomposed by the vanadium pentoxide and the cerium oxide at high temperature can oxidize the impurity component ferrous oxide in the material, so that the generation of ferrous oxide in the material is avoided, the vanadium pentoxide reacts with magnesia at high temperature to generate magnesium vanadate, and the cerium oxide plays a role in improving the liquid phase viscosity in the system; the magnesium ions in the forsterite are used for achieving the purpose of stabilizing zirconia, the thermal shock stability of the product is improved, the composition and the structure formed by the granular powder A and the granular powder B at high temperature respectively have micro mismatch of linear expansion coefficients, microcracks are formed at the interface in the cooling process by utilizing the micro mismatch of the linear expansion coefficients, the purpose of further enhancing the thermal shock stability of the composite material is achieved through the microcracks, the recycling of forsterite fine powder is realized, and the method has the characteristics of low energy consumption, environmental protection and convenience in large-scale production; the prepared magnesium composite phase material with high thermal shock stability has high strength and good thermal shock stability, can be applied to kiln furniture fields such as sagger for sintering a precursor of a positive electrode material of a lithium battery, honeycomb ceramics and the like, and has wide application range.
Detailed Description
The present invention will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Example 1
Firstly, taking 92-95% of magnesia fine powder and 5-8% of vanadium pentoxide fine powder as raw materials, adding 40-45% of water, 2-3% of polyvinyl alcohol and 0.5-0.8% of cerium oxide fine powder into the raw materials, mixing, ball-milling for 6-8 hours to obtain slurry, and then spraying and granulating the slurry to obtain granular powder A; mixing 90-92% of forsterite fine powder and 8-10% of zirconia fine powder serving as raw materials, adding 40-45% of water and 2-3% of polyvinyl alcohol serving as the raw materials, ball milling for 6-8 hours to obtain slurry, and then spraying and granulating the slurry to obtain granular powder B; and then uniformly mixing the granular powder A and the granular powder B, performing mechanical compression molding, preserving heat for 8-9 hours at 1400-1420 ℃, and naturally cooling to obtain the magnesium complex phase material with high thermal shock stability.
The magnesium complex phase material with high thermal shock stability prepared by the embodiment is detected: the compressive strength is 80-100 MPa, and the retention rate of the elastic modulus is 87% when the air cooling is carried out for ten times at 1100 ℃.
Example 2
Taking 95-98% of magnesia fine powder and 2-5% of vanadium pentoxide fine powder as raw materials, adding 45-50% of water, 3-4% of polyvinyl alcohol and 0.8-1% of cerium oxide fine powder into the raw materials, mixing, ball-milling for 6-8 hours to obtain slurry, and then spraying and granulating the slurry to obtain granular powder A; mixing 92-95% of forsterite fine powder and 5-8% of zirconia fine powder serving as raw materials, adding 45-50% of water and 3-4% of polyvinyl alcohol serving as the raw materials, ball-milling for 6-8 hours to obtain slurry, and then spraying and granulating the slurry to obtain granular powder B; and then uniformly mixing the granular powder A and the granular powder B, performing mechanical compression molding, preserving heat for 9-10 hours at the temperature of 1420-1450 ℃, and naturally cooling to obtain the magnesium complex phase material with high thermal shock stability.
The magnesium complex phase material with high thermal shock stability prepared by the embodiment is detected: : the compressive strength is 75-95 MPa, and the retention rate of the elastic modulus is 89% when the air-cooled ten times at 1100 ℃.
The above examples are merely illustrative of the preferred embodiments of the present invention and are not intended to limit the spirit and scope of the present invention. Various modifications and improvements of the technical scheme of the present invention will fall within the protection scope of the present invention without departing from the design concept of the present invention, and the technical content of the present invention is fully described in the claims.
Claims (8)
1. A magnesium complex phase material with high thermal shock stability is characterized in that: the powder is formed by uniformly mixing granular powder A and granular powder B and then mechanically pressing the mixture, wherein the granular powder A comprises 92-98% of magnesia fine powder, 2-8% of vanadium pentoxide fine powder, 2-4% of polyvinyl alcohol, 0.5-1% of cerium oxide fine powder and 40-50% of water according to weight percentage, and the granular powder B comprises 90-95% of forsterite fine powder, 5-10% of zirconium oxide fine powder, 2-4% of polyvinyl alcohol and 40-50% of water according to weight percentage.
2. The magnesium composite material with high thermal shock resistance according to claim 1, wherein: the MgO content in the magnesia fine powder is more than or equal to 92 percent, and the grain diameter is less than or equal to 0.089mm.
3. The magnesium composite material with high thermal shock resistance according to claim 1, wherein: v in the fine vanadium pentoxide 2 O 5 The content is more than or equal to 97 percent and the grain diameter is less than or equal to 0.089mm.
4. According to claim 1The magnesium composite phase material with high thermal shock stability is characterized in that: ceO in the cerium oxide fine powder 2 The content is more than or equal to 98 percent and the grain diameter is less than or equal to 0.05mm.
5. The magnesium composite material with high thermal shock resistance according to claim 1, wherein: the MgO content in the forsterite fine powder is more than or equal to 40%, and the SiO content is more than or equal to 2 The content is more than or equal to 37 percent, fe 2 The O3 content is less than or equal to 10 percent, and the particle size of the forsterite fine powder is less than or equal to 0.089mm.
6. The magnesium composite material with high thermal shock resistance according to claim 1, wherein: zrO in the zirconia fine powder 2 The content is more than or equal to 98wt percent; the grain diameter of the zirconia fine powder is less than or equal to 0.02mm.
7. The magnesium composite material with high thermal shock resistance according to claim 1, wherein: the pressure intensity of the mechanical press molding is 40-50 MPa.
8. The method for preparing the magnesium composite material with high thermal shock stability according to any one of claims 1 to 7, wherein the method comprises the following steps: the method comprises the following steps:
step 1: taking magnesia fine powder and vanadium pentoxide fine powder as raw materials, adding water, polyvinyl alcohol and cerium oxide fine powder for mixing, ball milling for 6-8 hours to obtain slurry, and then spraying and granulating the slurry to obtain granular powder A;
step 2: taking forsterite fine powder and zirconia fine powder as raw materials, adding water and polyvinyl alcohol, mixing, ball milling for 6-8 hours to obtain slurry, and then spraying and granulating the slurry to obtain granular powder B;
step 3: and (3) uniformly mixing the granular powder A prepared in the step (1) with the granular powder B prepared in the step (2), press-forming, preserving heat for 8-10 h at 1400-1450 ℃, and naturally cooling to obtain the magnesium complex phase material with high thermal shock stability.
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