CN112125686A - Method for preparing silicon carbide coated graphite by molten salt isolation - Google Patents

Method for preparing silicon carbide coated graphite by molten salt isolation Download PDF

Info

Publication number
CN112125686A
CN112125686A CN202011059116.4A CN202011059116A CN112125686A CN 112125686 A CN112125686 A CN 112125686A CN 202011059116 A CN202011059116 A CN 202011059116A CN 112125686 A CN112125686 A CN 112125686A
Authority
CN
China
Prior art keywords
salt
powder
molten salt
blank
graphite
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202011059116.4A
Other languages
Chinese (zh)
Inventor
贾全利
尹艺程
张少伟
王世界
刘新红
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhengzhou University
Original Assignee
Zhengzhou University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhengzhou University filed Critical Zhengzhou University
Priority to CN202011059116.4A priority Critical patent/CN112125686A/en
Publication of CN112125686A publication Critical patent/CN112125686A/en
Pending legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/66Monolithic refractories or refractory mortars, including those whether or not containing clay
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/628Coating the powders or the macroscopic reinforcing agents
    • C04B35/62802Powder coating materials
    • C04B35/62828Non-oxide ceramics
    • C04B35/62831Carbides
    • C04B35/62834Silicon carbide
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30Constituents and secondary phases not being of a fibrous nature
    • C04B2235/42Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
    • C04B2235/422Carbon
    • C04B2235/425Graphite

Abstract

A method for preparing silicon carbide coated graphite by molten salt isolation comprises the steps of weighing silicon powder, crystalline flake graphite powder and molten salt according to a set proportion, uniformly mixing the silicon powder, the crystalline flake graphite powder and the molten salt in a ball milling tank to obtain mixed slurry, drying the mixed slurry in an oven, and sieving the dried powder to obtain granulated powder A; placing the granulated powder A in a mould to be pressed and molded to obtain a blank body B, then using a large mould to wrap the blank body B by using molten salt as a filler, and pressing and molding to obtain a salt packaging sample C; placing the salt-sealed sample C in an alumina crucible, adding enough molten salt into the crucible to completely cover the salt-sealed sample C, covering the crucible, placing the crucible in a high-temperature furnace, heating to 1300 plus materials and 1400 ℃, keeping the temperature for 1-5h, roasting, and naturally cooling to room temperature; and washing the product with deionized water to remove salt in a salt layer and a blank, and filtering and drying to obtain the graphite powder which is uniformly dispersed and completely coated with SiC. The method has the advantages of wide raw material source, low cost, short time consumption, no need of expensive argon as protective atmosphere in the preparation process and the like.

Description

Method for preparing silicon carbide coated graphite by molten salt isolation
Technical Field
The invention relates to the technical field of composite materials, in particular to a method for preparing silicon carbide coated graphite by molten salt isolation.
Background
In order to improve the high temperature slag erosion resistance and thermal shock resistance of oxide-based castable materials, it is often desirable to add carbon materials to achieve this goal. The crystalline integrity of the flake graphite and the non-wettability of the flake graphite with the slag are the preferred carbon source of the carbon-containing castable, but the graphite is not wetted with water, and the poor fluidity and the poor dispersibility of the graphite cause the water addition amount of the carbon-containing castable to be greatly increased, so that the normal temperature performance and the high temperature performance of the castable are obviously reduced, the porosity is obviously improved, and the improvement of the slag resistance of the material is not facilitated. To address this problem, graphite is often surface modified to improve its wettability and dispersibility.
The method for modifying the graphite surface mainly comprises introducing a surfactant, a graphite granulation method, a surface coating and the like. The technical process of the surfactant is simple and convenient, the cost is low, but the improvement on the wettability and the dispersibility of the graphite is limited, the water adding amount required by the molding of the casting material is still high, the performance of the casting material is poor, and the use requirement cannot be met; the graphite granulation method can obviously reduce the water demand, but the granulated graphite has larger size and is in millimeter level, which is not beneficial to the uniform distribution of the graphite in the casting material and has limited improvement on the slag resistance of the casting material.
The graphite is coated on the surface by chemical or physical means, the coating layer generally has better wettability and dispersibility, and the existence of the coating layer can prevent the graphite from contacting with oxygen so as to slow down the oxidation speed of the graphite. Chinese patent (CN 101565848A) entitled "method for preparing gradient silicon carbide coating by electrophoretic codeposition" provides a method for preparing gradient silicon carbide coating by electrophoretic codeposition, which adopts the technical scheme that silicon powder, carbon black, polyvinyl butyral, acetone and n-butylamine are mixed and ultrasonically treated to prepare suspension, graphite material is used as an anode, deposition is carried out in a constant potential mode, and the suspension is dried and then sintered at 1200-1600 ℃. The process comprises electrophoretic deposition and sintering processes, and has the defects of high power consumption, high cost and the like.
The Chinese patent (CN 110615682A) with the patent name of 'a graphite surface modification method for carbon-containing refractory castable and application thereof' discloses a graphite surface modification method for carbon-containing refractory castable, which adopts the technical scheme that crystalline flake graphite powder and titanium powder are used as raw materials, and a self-propagating sintering method is adopted to prepare titanium carbide coated crystalline flake graphite.
Chinese patent (CN 107793164A) entitled "preparation method of granulated graphite of refractory castable material" provides a preparation method of granulated graphite for refractory castable material, which adopts the technical scheme that zirconium oxychloride octahydrate is used as a precursor, and a sol-gel method is adopted to coat the surface of graphite, but the graphite coating prepared by the method is weaker in combination with the graphite, and the coating is easy to peel off. This results in limited improvement in the wettability and dispersibility of the graphite and does not effectively reduce the actual water demand of the castable.
Compared with the traditional solid-phase sintering technology, the molten salt method has the advantages of low synthesis temperature, small environmental pollution, adjustable morphology and size, reusability of salts and the like, is applied to preparation of oxide powder and non-oxide powder, and has also been reported for preparation of graphite coated with molten salt in an auxiliary way, but the synthesis of the graphite coated with molten salt usually needs flowing argon as protective atmosphere.
The Chinese patent (CN 109942297A) entitled "silicon carbide nanowire reinforced high-orientation graphite composite material and preparation method" provides a preparation method of a silicon carbide nanowire reinforced graphite composite material, and the technical scheme is that silicon carbide nanowire coated flake graphite powder is prepared from silicon powder and flake graphite by a molten salt method, and discharge plasma sintering is carried out at 1600-2000 ℃ after pre-pressing molding. The technical scheme is simple in process, and the spark plasma sintering has the advantages of high heating rate, high efficiency and the like, but in the powder synthesis step, circulating argon is needed to be used as a protective atmosphere for protecting silicon powder and graphite from being oxidized.
The Chinese patent (CN 108640117A) with the name of 'synthesizing a two-dimensional SiC ultrathin nanostructure by using a graphene as a template molten salt method and a preparation method thereof' discloses a method for synthesizing a two-dimensional SiC ultrathin nanostructure by using a graphene as a template molten salt method and a preparation method thereof. In the method, flowing argon is still required to be introduced to serve as a protective atmosphere for protecting the silicon powder and the graphite from being oxidized.
Therefore, a preparation technology of coated graphite with low cost, environmental friendliness and uniform product size is urgently needed to be developed to solve the problem of poor wettability of crystalline flake graphite and water.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides the method for preparing the silicon carbide coated graphite by molten salt isolation, which has the advantages of low preparation cost, environmental friendliness, uniform product size, no need of expensive argon as a protective atmosphere and easiness in large-scale preparation.
The object of the invention can be achieved by the following technical measures:
the method for preparing the silicon carbide coated graphite by molten salt isolation comprises the following steps:
a. weighing silicon powder, crystalline flake graphite powder and molten salt according to the mass ratio of 7: 6-24: 13-31, and uniformly mixing by using a ball mill in a wet grinding mode to obtain mixed slurry, wherein the mass ratio of the material to balls to ethanol is 1:2: 2;
b. putting the mixed slurry into an oven for drying, and sieving and granulating the dried powder to obtain granulated powder A;
c. placing the granulated powder A in a mould to be pressed and molded to obtain a blank body B, then wrapping the blank body B by using a mould larger than the blank body B and using molten salt as a filler, and then pressing and molding to obtain a salt packaging sample C;
d. placing a salt packaging sample C in an alumina crucible, putting molten salt capable of completely covering the salt packaging sample C in the crucible as a salt bed, covering the molten salt, putting the crucible in a high-temperature furnace, heating to 1300-;
e. and d, washing the blank obtained in the step d by deionized water to remove salt layers and salt in the blank, crushing the blank to dissolve the salt in the blank, filtering, and finally drying to obtain the target powder.
Furthermore, in the step a, the purity of the silicon powder is more than 98%, and the particle size is less than 75 microns; the purity of the flake graphite powder is more than 95 percent, and the granularity is less than 100 microns; the fused salt is analytically pure and has a particle size of less than 100 microns.
The mass ratio of the silicon powder to the crystalline flake graphite in the step a is 7: 6-24; the mass ratio of the total mass of the silicon powder and the crystalline flake graphite powder to the molten salt is 1: 1.
In the step a, the molten salt is one of potassium chloride, potassium bromide or sodium chloride.
And C, placing the granulated powder A in a mould to be pressed and molded to obtain a blank B with the pressure of 200MPa, then wrapping the blank B by using a mould larger than the blank B and using molten salt as a filler, and pressing and molding to obtain a salt packaging sample C with the pressure of 200 MPa.
And d, placing the cover into a high-temperature furnace for firing at the temperature of 1300-1400 ℃ at the speed of 5 ℃/min, and keeping the temperature for 1-5h, wherein the firing atmosphere is air atmosphere and does not need to be protected by introducing argon.
The invention has the following beneficial effects:
the synthesis process of preparing the silicon carbide coated graphite by using the method does not need expensive argon as protective atmosphere, and the synthesized powder has good dispersibility and uniform size and does not need extra grinding.
More particularly to
1) The used molten salt has low price, wide source, no toxicity and environmental protection.
2) The synthesis temperature in the synthesis process is 100-200 ℃ lower than the traditional solid phase sintering temperature.
3) And expensive argon is not used as protective atmosphere in the synthesis process, so that the preparation cost is low.
4) The surface of the synthesized graphite powder is uniformly coated by SiC, and the powder has good wettability with water.
Drawings
Fig. 1 is an X-ray diffraction pattern of the prepared silicon carbide-coated graphite powder.
Fig. 2 and 3 are scanning electron micrographs of the prepared silicon carbide-coated graphite powder.
Detailed Description
The invention will be further described with reference to the following examples:
the method for preparing the silicon carbide coated graphite by molten salt isolation comprises the following steps:
a. weighing silicon powder, crystalline flake graphite powder and molten salt according to the mass ratio of 7: 6-24: 13-31, and uniformly mixing by using a ball mill in a wet grinding mode to obtain mixed slurry, wherein the mass ratio of the material to balls to ethanol is 1:2: 2;
b. putting the mixed slurry into an oven for drying, and sieving and granulating the dried powder to obtain granulated powder A;
c. placing the granulated powder A in a mould to be pressed and molded to obtain a blank body B, then wrapping the blank body B by using a mould larger than the blank body B and using molten salt as a filler, and then pressing and molding to obtain a salt packaging sample C;
d. placing a salt packaging sample C in an alumina crucible, putting molten salt capable of completely covering the salt packaging sample C in the crucible as a salt bed, covering the molten salt, putting the crucible in a high-temperature furnace, heating to 1300-;
e. and d, washing the blank obtained in the step d by deionized water to remove salt layers and salt in the blank, crushing the blank to dissolve the salt in the blank, filtering, and finally drying to obtain the target powder.
Furthermore, in the step a, the purity of the silicon powder is more than 98%, and the particle size is less than 75 microns; the purity of the flake graphite powder is more than 95 percent, and the granularity is less than 100 microns; the fused salt is analytically pure and has a particle size of less than 100 microns.
The mass ratio of the silicon powder to the crystalline flake graphite in the step a is 7: 6-24; the mass ratio of the total mass of the silicon powder and the crystalline flake graphite powder to the molten salt is 1: 1.
In the step a, the molten salt is one of potassium chloride, potassium bromide or sodium chloride.
And C, placing the granulated powder A in a mould to be pressed and molded to obtain a blank B with the pressure of 200MPa, then wrapping the blank B by using a mould larger than the blank B and using molten salt as a filler, and pressing and molding to obtain a salt packaging sample C with the pressure of 200 MPa.
And d, placing the cover into a high-temperature furnace for firing at the temperature of 1300-1400 ℃ at the speed of 5 ℃/min, and keeping the temperature for 1-5h, wherein the firing atmosphere is air atmosphere and does not need to be protected by introducing argon.
Example 1
Weighing 7 parts of silicon powder and 6 parts of crystalline flake graphite powder according to mass fraction, weighing 13 parts of potassium chloride, putting the potassium chloride into a ball milling tank, adding grinding balls and industrial ethanol liquid into the ball milling tank for ball milling for 4 hours, putting the mixed slurry after ball milling into an oven for drying for 12 hours at the temperature of 80 ℃, and sieving through a 40-mesh sieve after drying to obtain granulation powder A; putting the granulation powder A into a phi 20mm mould, and performing compression molding under the uniaxial pressure of 200MPa, and putting the initial sample into a phi 36mm mould full of potassium chloride, and performing compression molding under the uniaxial pressure of 200 MPa; placing the pressed salt packaging sample in an alumina crucible, putting sufficient potassium chloride in the crucible as a salt bed to fully immerse the sample, covering the crucible with a cover, putting the crucible in a high-temperature furnace, roasting to 1400 ℃ at the heating rate of 5 ℃/min, preserving heat for 3h, and naturally cooling to room temperature; and finally, repeatedly washing the product with deionized water for several times to remove salt in a salt layer and the initial sample, filtering, and drying for 12 hours to obtain the silicon carbide coated graphite powder which is dispersed and uniform in size.
Example 2
Weighing 7 parts of silicon powder and 12 parts of crystalline flake graphite powder according to mass fraction, then weighing 19 parts of potassium bromide, putting the potassium bromide into a ball milling tank, adding grinding balls and industrial ethanol liquid into the ball milling tank for ball milling for 4 hours, putting the mixed powder after ball milling into a drying oven for drying for 12 hours at the temperature of 80 ℃, and screening through a 40-mesh sieve after drying to obtain granulation powder A; putting the granulation powder A into a phi 20mm mould, and performing compression molding under the uniaxial pressure of 200MPa, and putting the initial sample into a phi 36mm mould full of potassium bromide, and performing compression molding under the uniaxial pressure of 200 MPa; placing the pressed salt packaging sample in an alumina crucible, putting sufficient potassium bromide in the crucible as a salt bed to fully immerse the sample, covering the crucible, putting the crucible in a high-temperature furnace, roasting to 1350 ℃ at the heating rate of 5 ℃/min, preserving heat for 4h, and naturally cooling to room temperature; and finally, repeatedly washing the product with deionized water for several times to remove salt in a salt layer and the initial sample, filtering, and drying for 12 hours to obtain the silicon carbide coated graphite powder which is dispersed and uniform in size.
Example 3
Weighing 7 parts of silicon powder and 24 parts of crystalline flake graphite powder according to mass fraction, weighing 31 parts of sodium chloride, putting the sodium chloride into a ball milling tank, adding grinding balls and industrial ethanol liquid into the ball milling tank for ball milling for 4 hours, putting the mixed powder after ball milling into an oven for drying at 80 ℃ for 12 hours, and sieving through a 40-mesh sieve after drying to obtain granulation powder A; putting the granulation powder A into a phi 20mm mould, pressing and molding at the uniaxial pressure of 200MPa, putting the initial sample into a phi 36mm mould full of sodium chloride, and pressing and molding at the uniaxial pressure of 200 MPa; placing the pressed salt packaging sample in an alumina crucible, putting sufficient sodium chloride in the crucible as a salt bed to fully immerse the sample, covering the crucible, putting the crucible in a high-temperature furnace, roasting to 1300 ℃ at the heating rate of 5 ℃/min, keeping the temperature for 5h, and naturally cooling to room temperature; and finally, repeatedly washing the product with deionized water for several times to remove salt in a salt layer and the initial sample, filtering, and drying for 12 hours to obtain the silicon carbide coated graphite powder which is dispersed and uniform in size.
The crystal structure and chemical composition of the sample were analyzed by X-ray diffraction, and the results are shown in fig. 1, which shows that the product was graphite and silicon carbide composite powder.
The shape, size and characteristics of the sample are analyzed by a scanning electron microscope, and the results are shown in fig. 2 and fig. 3, and the test results show that the graphite surface is successfully coated with the silicon carbide.
Compared with other preparation methods, the method uses the molten salt which has low price, wide source, no toxicity and environmental protection; the synthesis temperature in the synthesis process is 100-200 ℃ lower than the traditional solid phase sintering temperature, so that the energy is saved; expensive argon is not used as protective atmosphere in the synthesis process, so that the preparation cost is low; the synthesized powder has good dispersibility and uniform size; the prepared SiC-coated crystalline flake graphite powder has good wettability with water.

Claims (6)

1. A method for preparing silicon carbide coated graphite by molten salt isolation is characterized by comprising the following steps: the method comprises the following steps:
a. weighing silicon powder, crystalline flake graphite powder and molten salt according to the mass ratio of 7: 6-24: 13-31, and uniformly mixing by using a ball mill in a wet grinding mode to obtain mixed slurry, wherein the mass ratio of the material to balls to ethanol is 1:2: 2;
b. putting the mixed slurry into an oven for drying, and sieving and granulating the dried powder to obtain granulated powder A;
c. placing the granulated powder A in a mould to be pressed and molded to obtain a blank body B, then wrapping the blank body B by using a mould larger than the blank body B and using molten salt as a filler, and then pressing and molding to obtain a salt packaging sample C;
d. placing a salt packaging sample C in an alumina crucible, putting molten salt capable of completely covering the salt packaging sample C in the crucible as a salt bed, covering the molten salt, putting the crucible in a high-temperature furnace, heating to 1300-;
e. and d, washing the blank obtained in the step d by deionized water to remove salt layers and salt in the blank, crushing the blank to dissolve the salt in the blank, filtering, and finally drying to obtain the target powder.
2. The method of molten salt isolation for preparing silicon carbide coated graphite according to claim 1, characterized in that: in the step a, the purity of the silicon powder is more than 98%, and the particle size is less than 75 microns; the purity of the flake graphite powder is more than 95 percent, and the granularity is less than 100 microns; the fused salt is analytically pure and has a particle size of less than 100 microns.
3. The method of molten salt isolation for preparing silicon carbide coated graphite according to claim 1, characterized in that: the mass ratio of the silicon powder to the crystalline flake graphite in the step a is 7: 6-24; the mass ratio of the total mass of the silicon powder and the crystalline flake graphite powder to the molten salt is 1: 1.
4. The method of molten salt isolation for preparing silicon carbide coated graphite according to claim 1, characterized in that: in the step a, the molten salt is one of potassium chloride, potassium bromide or sodium chloride.
5. The method of molten salt isolation for preparing silicon carbide coated graphite according to claim 1, characterized in that: and C, placing the granulated powder A in a mould to be pressed and molded to obtain a blank B with the pressure of 200MPa, then wrapping the blank B by using a mould larger than the blank B and using molten salt as a filler, and pressing and molding to obtain a salt packaging sample C with the pressure of 200 MPa.
6. The method of molten salt isolation for preparing silicon carbide coated graphite according to claim 1, characterized in that: and d, placing the cover into a high-temperature furnace for firing at the temperature of 1300-1400 ℃ at the speed of 5 ℃/min, and keeping the temperature for 1-5h, wherein the firing atmosphere is air atmosphere and does not need to be protected by introducing argon.
CN202011059116.4A 2020-09-30 2020-09-30 Method for preparing silicon carbide coated graphite by molten salt isolation Pending CN112125686A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011059116.4A CN112125686A (en) 2020-09-30 2020-09-30 Method for preparing silicon carbide coated graphite by molten salt isolation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011059116.4A CN112125686A (en) 2020-09-30 2020-09-30 Method for preparing silicon carbide coated graphite by molten salt isolation

Publications (1)

Publication Number Publication Date
CN112125686A true CN112125686A (en) 2020-12-25

Family

ID=73844959

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011059116.4A Pending CN112125686A (en) 2020-09-30 2020-09-30 Method for preparing silicon carbide coated graphite by molten salt isolation

Country Status (1)

Country Link
CN (1) CN112125686A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113354401A (en) * 2021-06-25 2021-09-07 中冶武汉冶金建筑研究院有限公司 Ammonium ion stable silica sol combined iron runner castable

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1718539A (en) * 2004-07-08 2006-01-11 武汉科技大学 Method of preparing titanium carbide material using fused salt method
CN103979538A (en) * 2014-05-30 2014-08-13 四川理工学院 Method for preparing micro-nano TiC/TiSi2 composite powder
CN105732043A (en) * 2016-03-01 2016-07-06 郑州大学 Method for preparing hafnium carbide ceramic powder body by using fused salt under assistance of carbon thermal reduction
CN105732042A (en) * 2016-03-01 2016-07-06 郑州大学 Method for preparing ultrafine tantalum carbide powder by using fused salt under assistance of low temperature
CN105948762A (en) * 2016-04-25 2016-09-21 武汉科技大学 Composite powder of zirconium carbide cladding graphite and preparation method thereof
WO2017106509A1 (en) * 2015-12-18 2017-06-22 Elysium Industries Ltd. Salt compositions for molten salt reactors
CN107814590A (en) * 2017-11-07 2018-03-20 中国科学院山西煤炭化学研究所 A kind of preparation method of fusedsalt reactor graphite surface SiC coatings
CN109824382A (en) * 2019-04-08 2019-05-31 西安航空学院 A kind of heat management SiC/ graphite film laminar composite and preparation method thereof
CN109928755A (en) * 2019-03-15 2019-06-25 西安交通大学 A kind of tungsten carbide enhancing C-base composte material and preparation method
CN110615682A (en) * 2019-09-23 2019-12-27 西安建筑科技大学 Graphite surface modification method for carbon-containing refractory castable and application thereof
CN110958995A (en) * 2017-07-13 2020-04-03 于利奇研究中心有限公司 Method for preparing non-oxide ceramic powder
CN111009645A (en) * 2019-11-27 2020-04-14 宜宾锂宝新材料有限公司 graphene-based/AlPO4Method for compositely coating modified high-nickel ternary cathode material
CN111633218A (en) * 2020-06-17 2020-09-08 西北有色金属研究院 High-entropy alloy powder and oxygen-free sintering preparation method thereof

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1718539A (en) * 2004-07-08 2006-01-11 武汉科技大学 Method of preparing titanium carbide material using fused salt method
CN103979538A (en) * 2014-05-30 2014-08-13 四川理工学院 Method for preparing micro-nano TiC/TiSi2 composite powder
WO2017106509A1 (en) * 2015-12-18 2017-06-22 Elysium Industries Ltd. Salt compositions for molten salt reactors
CN105732043A (en) * 2016-03-01 2016-07-06 郑州大学 Method for preparing hafnium carbide ceramic powder body by using fused salt under assistance of carbon thermal reduction
CN105732042A (en) * 2016-03-01 2016-07-06 郑州大学 Method for preparing ultrafine tantalum carbide powder by using fused salt under assistance of low temperature
CN105948762A (en) * 2016-04-25 2016-09-21 武汉科技大学 Composite powder of zirconium carbide cladding graphite and preparation method thereof
CN110958995A (en) * 2017-07-13 2020-04-03 于利奇研究中心有限公司 Method for preparing non-oxide ceramic powder
CN107814590A (en) * 2017-11-07 2018-03-20 中国科学院山西煤炭化学研究所 A kind of preparation method of fusedsalt reactor graphite surface SiC coatings
CN109928755A (en) * 2019-03-15 2019-06-25 西安交通大学 A kind of tungsten carbide enhancing C-base composte material and preparation method
CN109824382A (en) * 2019-04-08 2019-05-31 西安航空学院 A kind of heat management SiC/ graphite film laminar composite and preparation method thereof
CN110615682A (en) * 2019-09-23 2019-12-27 西安建筑科技大学 Graphite surface modification method for carbon-containing refractory castable and application thereof
CN111009645A (en) * 2019-11-27 2020-04-14 宜宾锂宝新材料有限公司 graphene-based/AlPO4Method for compositely coating modified high-nickel ternary cathode material
CN111633218A (en) * 2020-06-17 2020-09-08 西北有色金属研究院 High-entropy alloy powder and oxygen-free sintering preparation method thereof

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
APURV DASH等: ""Molten salt shielded synthesis of oxidation prone materials in air"", 《NATURE MATERIALS》 *
李韦: ""熔盐辅助制备链珠状SiC/SiO2异质结构及其光致发光性能研究"", 《中国优秀硕士学位论文全文数据库 (工程科技Ⅰ辑)》 *
毕玉保等: ""微波熔盐法制备SiC改性石墨"", 《耐火材料》 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113354401A (en) * 2021-06-25 2021-09-07 中冶武汉冶金建筑研究院有限公司 Ammonium ion stable silica sol combined iron runner castable

Similar Documents

Publication Publication Date Title
CN100431738C (en) Boron nitride composite paint for precise invested mold casting of titanium and titanium alloy
CN108358205B (en) Ti3SiC2Powder synthesis method
CN108516803B (en) Magnesium aluminate spinel reinforced magnesium oxide base foamed ceramic filter and preparation method thereof
CN109231231B (en) Low-temperature preparation method of zirconium diboride powder
CN112125686A (en) Method for preparing silicon carbide coated graphite by molten salt isolation
WO2019196178A1 (en) Magnesium aluminate spinel reinforced magnesium oxide-based foam ceramic filter synthesized in situ from magnesium oxide whisker, and preparation method therefor
WO2019196180A1 (en) Spinel-reinforced magnesium oxide-based foam ceramic filter and preparation method therefor
CN111850377B (en) In-situ Al2O3Preparation method of particle reinforced aluminum matrix composite
KR101859818B1 (en) Preparation method of sintered SiC ceramic by using plasma treated Si-SiC nanoparticle
CN1699168A (en) Combustion synthesis method of zirconium diboride micro-powder
CN108546093B (en) Alumina short fiber reinforced magnesium oxide base crucible and preparation method thereof
CN108585889B (en) Bar-shaped zirconium boride-sheet silicon carbide single crystal composite powder and preparation method thereof
CN108424124B (en) Spinel reinforced magnesium oxide base crucible synthesized in situ by magnesium oxide whisker and preparation method thereof
CN111517800B (en) Method for preparing high-purity superfine zirconium boride powder by grinding aid auxiliary sanding
CN1006886B (en) Silicone nitride/boron nitride composite and prepn. thereof
CN106348773A (en) Erosion fire-resistant crucible of Lithium electricity resistance material added with SiAlON-AlN-TiN
CN111825452A (en) Low-thermal-conductivity high-entropy aluminate ceramic and preparation method thereof
CN108622911B (en) Superfine zirconium diboride-silicon carbide composite powder and preparation method thereof
EP0167483B1 (en) Metal borides and their method of preparation
CN108796261B (en) In-situ self-generated TiB2Particle reinforced aluminum-based composite material and preparation method thereof
CN108002389B (en) The method and silicon powder of zinc bismuth alloy coated Si magnesium granules preparation foam-like silicon powder
AU2012299712B2 (en) Titanium diboride granules as erosion protection for cathodes
CN106588022A (en) Process for preparing silicon carbide foam ceramic by using template method
CN108439959B (en) Zirconium dioxide short fiber and magnesium oxysulfate whisker composite reinforced magnesium oxide-based crucible and preparation method thereof
Zhan et al. High Temperature Decomposition Behavior of CaZrO3 Coating on Graphite for TiNi Alloy Melting

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination