CN109467448A - A kind of Al4SiC4Refractory material and preparation method - Google Patents

A kind of Al4SiC4Refractory material and preparation method Download PDF

Info

Publication number
CN109467448A
CN109467448A CN201811287829.9A CN201811287829A CN109467448A CN 109467448 A CN109467448 A CN 109467448A CN 201811287829 A CN201811287829 A CN 201811287829A CN 109467448 A CN109467448 A CN 109467448A
Authority
CN
China
Prior art keywords
sic
refractory material
preparation
present
premix
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
CN201811287829.9A
Other languages
Chinese (zh)
Inventor
顾华志
陈定
黄奥
张美杰
倪红卫
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.)
Wuhan University of Science and Engineering WUSE
Wuhan University of Science and Technology WHUST
Original Assignee
Wuhan University of Science and Engineering WUSE
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 Wuhan University of Science and Engineering WUSE filed Critical Wuhan University of Science and Engineering WUSE
Priority to CN201811287829.9A priority Critical patent/CN109467448A/en
Publication of CN109467448A publication Critical patent/CN109467448A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
    • C04B35/56—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides
    • 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
    • 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
    • C04B2235/40—Metallic constituents or additives not added as binding phase
    • C04B2235/402—Aluminium
    • 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
    • C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
    • C04B2235/428—Silicon
    • 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
    • C04B2235/48—Organic compounds becoming part of a ceramic after heat treatment, e.g. carbonising phenol resins

Abstract

The present invention relates to a kind of Al4SiC4Refractory material and preparation method thereof.Its technical solution is: metallic aluminium, elemental silicon and alusil alloy being added into thermosetting phenolic resin, control Al, Si and C molar ratio is 4:1:4~4:1:5, is stirred evenly to get premix；Above-mentioned premix is toasted again 24~30 hours under the conditions of 120~250 DEG C, is then handled by induction furnace up to Al4SiC4Refractory material.The present invention prepares Al4SiC4Refractory material has the characteristics that synthesis rate is fast, the uniform vapour resistant corrosivity of product component is strong.

Description

A kind of Al4SiC4Refractory material and preparation method
Technical field
The invention belongs to technical field of refractory materials, and in particular to a kind of Al4SiC4Refractory material and preparation method thereof.
Background technique
Double carbide Al4SiC4With high-melting-point (2037 DEG C), high intensity, good chemical stability, in high temperature oxygen The stable mullite of Surface Creation and corundum protective film under the conditions of change have good antioxygenic property and resistance to vapor corrosion Can, have broad application prospect in special refractories field.Generally use solid state reaction kinetics Al both at home and abroad at present4SiC4, For Wang Gang using Al, Si and carbon black/graphite as raw material, 20~40h of mechanical ball mill is prepared for Al4SiC4[CN 101423215A]；Chen Using Al, Si and carbon black as raw material, is handled under an ar atmosphere by 1800 DEG C × 3h, obtain the Al of high-purity4SiC4[Chen J H, Zhang Z H,Mi W J,et al.Fabrication and oxidation behavior of Al4SiC4powders.J.Am.Ceram.S℃.,2017,100(7):3145-3154.].As it can be seen that current solid state reaction kinetics Al4SiC4Have the shortcomings that reaction temperature is higher, soaking time is long.
Summary of the invention
To solve the deficiencies in the prior art, the present invention provides a kind of Al4SiC4Refractory material and preparation method thereof.
Technical solution provided by the present invention is as follows:
A kind of Al4SiC4The preparation method of refractory material, comprising the following steps: by thermosetting phenolic resin, metallic aluminium, list Matter silicon and alusil alloy are mixed into premix, then toast the premix 24~30 hours under the conditions of 120~250 DEG C, Sensed stove heating is reacted and is kept the temperature to get Al under protective atmosphere again4SiC4Refractory material, wherein Al in the premix, Si and C molar ratio is 4:1:4~4:1:5.
In above-mentioned technical proposal, thermosetting phenolic resin is the common bonding agent of refractory material, and the present invention is to thermosetting property phenol Metallic aluminium, elemental silicon and alusil alloy are added in urea formaldehyde, melts under high temperature and forms Al-Si metal bath, while phenolic resin Pyrolysis forms the agraphitic carbon of high activity, reacts at a lower temperature with Al-Si metal bath and generates Al4SiC4。
In addition, the present invention heats raw material using induction furnace, induction furnace is produced by applying alternating current to induction coil Alternating magnetic field is given birth to, conductive material generates induced electromotive force under action of alternating magnetic field in furnace, and conductive material is in faradic work With generation Joule heat (eddy current effect), heated material；Under action of alternating magnetic field, conductive Al-Si metal bath is by long-range navigation The hereby comprehensive function of power and gravity, periodically variable Lorentz force generate function composite by electromagnetic stirring in metal bath.In electromagnetism In whipping process, Al-Si metal bath reacts the Al being precipitated with C4SiC4Crystal is during exercise since mutual fricting shearing is easy to disconnected Destruction is split, dissociate the Al destroyed4SiC4Crystal becomes new nucleus, and electromagnetic agitation makes melt that convection current occur, and accelerates mass transfer and passes Heat generates the crystallization of large area, accelerates Al4SiC4Formation.
Specifically, being increased to 1000~1600 DEG C with the rate of 3~20 DEG C/min carries out heating reaction.
Based on the above-mentioned technical proposal, the present invention is realized with lower reaction temperature, realizes Al4SiC4Generation.
Specifically, keeping the temperature 0.5~4h at 1000~1600 DEG C after heating reaction.
Based on the above-mentioned technical proposal, the present invention is realized with lower reaction temperature and shorter soaking time, is realized Al4SiC4The growth of crystal.
Specifically, the Residual carbon of thermosetting phenolic resin is more than or equal to 45wt% after heating reaction and heat preservation, and be less than etc. In 60wt%.
Specifically, Al content >=99wt% of metallic aluminium；Partial size≤38 μm of metallic aluminium.
Specifically, Si content >=99wt% of elemental silicon；Partial size≤38 μm of elemental silicon.
Specifically, Al content >=80wt% of alusil alloy, Si content >=18wt%；Partial size≤38 of the alusil alloy μm。
Based on the above-mentioned technical proposal, metallic aluminium, elemental silicon and alusil alloy particle are easier to the fast reaction in induction furnace.
The present invention also provides according to above-mentioned Al4SiC4The Al that the preparation method of refractory material is prepared4SiC4Fire proofed wood Material.
The Al that the present invention obtains4SiC4Refractory material, by 1000 DEG C of vapor corrosion 100h (vapor and volume of air Than for 1:4, stagnation pressure is 1 standard atmospheric pressure), rate of body weight gain is 1.5~4.0%.
The present invention has following good effect compared with prior art:
The present invention prepares Al4SiC4The uniform vapour resistant of fast, product component is rotten with synthesis rate for the method for refractory material The strong feature of corrosion.Compared with method provided by the prior art, reaction time and soaking time further reduced.
Detailed description of the invention
Fig. 1 is the Al of preparation of the embodiment of the present invention4SiC4The XRD diagram of refractory material, it can be seen that synthesizing in Al4SiC4Purity with higher.
Specific embodiment
The principles and features of the present invention are described below, and illustrated embodiment is served only for explaining the present invention, is not intended to It limits the scope of the invention.
Embodiment 1
The present embodiment prepares Al4SiC4The method of refractory material is:
Metallic aluminium, elemental silicon and alusil alloy are added into thermosetting phenolic resin, control Al, Si and C molar ratio is 4: 1:4 stirs evenly to get premix；Above-mentioned premix is toasted 27 hours under the conditions of 200 DEG C again, then at sensed furnace Reason, sensed stove heating reaction and heat preservation, are added wherein being increased to 1000 DEG C with the rate of 10 DEG C/min under protective atmosphere Thermal response keeps the temperature 0.5h at 1000 DEG C to get Al after heating reaction4SiC4Refractory material.
Al manufactured in the present embodiment4SiC4Refractory material, purity >=80%, by 1000 DEG C of vapor corrosion 100h, (water steams Gas and volume of air ratio are 1:4, and stagnation pressure is 1 standard atmospheric pressure), rate of body weight gain 3.75%.
Embodiment 2
The present embodiment prepares Al4SiC4The method of refractory material is:
Metallic aluminium, elemental silicon and alusil alloy are added into thermosetting phenolic resin, control Al, Si and C molar ratio is 4: 1:4.2 stirs evenly to get premix；Above-mentioned premix is toasted 24~30 hours under the conditions of 200 DEG C again, is then passed through Induction furnace processing, sensed stove heating reaction and heat preservation under protective atmosphere, wherein being increased to 1200 with the rate of 11 DEG C/min Heating reaction DEG C is carried out, 0.5h is kept the temperature after heating reaction at 1200 DEG C to get Al4SiC4Refractory material.
Al manufactured in the present embodiment4SiC4Refractory material, purity >=83%, by 1000 DEG C of vapor corrosion 100h, (water steams Gas and volume of air ratio are 1:4, and stagnation pressure is 1 standard atmospheric pressure), rate of body weight gain 3.35%.
Embodiment 3
The present embodiment prepares Al4SiC4The method of refractory material is:
Metallic aluminium, elemental silicon and alusil alloy are added into thermosetting phenolic resin, control Al, Si and C molar ratio is 4: 1:4.4 stirs evenly to get premix；Above-mentioned premix is toasted 24~30 hours under the conditions of 200 DEG C again, is then passed through Induction furnace processing, sensed stove heating reaction and heat preservation under protective atmosphere, wherein being increased to 1300 with the rate of 12 DEG C/min Heating reaction DEG C is carried out, 0.5h is kept the temperature after heating reaction at 1300 DEG C to get Al4SiC4Refractory material.
Al manufactured in the present embodiment4SiC4Refractory material, purity >=85%, by 1000 DEG C of vapor corrosion 100h, (water steams Gas and volume of air ratio are 1:4, and stagnation pressure is 1 standard atmospheric pressure), rate of body weight gain 2.95%.
Embodiment 4
The present embodiment prepares Al4SiC4The method of refractory material is:
Metallic aluminium, elemental silicon and alusil alloy are added into thermosetting phenolic resin, control Al, Si and C molar ratio is 4: 1:4.6 stirs evenly to get premix；Above-mentioned premix is toasted 24~30 hours under the conditions of 200 DEG C again, is then passed through Induction furnace processing, sensed stove heating reaction and heat preservation under protective atmosphere, wherein being increased to 1400 with the rate of 20 DEG C/min Heating reaction DEG C is carried out, 2h is kept the temperature after heating reaction at 1400 DEG C to get Al4SiC4Refractory material.
Al manufactured in the present embodiment4SiC4Refractory material, purity >=89%, by 1000 DEG C of vapor corrosion 100h, (water steams Gas and volume of air ratio are 1:4, and stagnation pressure is 1 standard atmospheric pressure), rate of body weight gain 2.55%.
Embodiment 5
The present embodiment prepares Al4SiC4The method of refractory material is:
Metallic aluminium, elemental silicon and alusil alloy are added into thermosetting phenolic resin, control Al, Si and C molar ratio is 4: 1:4.8 stirs evenly to get premix；Above-mentioned premix is toasted 24~30 hours under the conditions of 200 DEG C again, is then passed through Induction furnace processing, sensed stove heating reaction and heat preservation under protective atmosphere, wherein being increased to 1500 DEG C with the rate of 5 DEG C/min Heating reaction is carried out, 2h is kept the temperature after heating reaction at 1500 DEG C to get Al4SiC4Refractory material.
Al manufactured in the present embodiment4SiC4Refractory material, purity >=92%, by 1000 DEG C of vapor corrosion 100h, (water steams Gas and volume of air ratio are 1:4, and stagnation pressure is 1 standard atmospheric pressure), rate of body weight gain 2.15%.
Embodiment 6
The present embodiment prepares Al4SiC4The method of refractory material is:
Metallic aluminium, elemental silicon and alusil alloy are added into thermosetting phenolic resin, control Al, Si and C molar ratio is 4: 1:5 stirs evenly to get premix；Above-mentioned premix is toasted under the conditions of 200 DEG C again 24~30 hours, then by sense Furnace is answered to handle, sensed stove heating reaction and heat preservation under protective atmosphere, wherein being increased to 1600 DEG C with the rate of 12 DEG C/min Heating reaction is carried out, 1h is kept the temperature after heating reaction at 1600 DEG C to get Al4SiC4Refractory material.
Al manufactured in the present embodiment4SiC4Refractory material, purity >=96%, by 1000 DEG C of vapor corrosion 100h, (water steams Gas and volume of air ratio are 1:4, and stagnation pressure is 1 standard atmospheric pressure), rate of body weight gain 1.75%.
To the Al of each embodiment preparation4SiC4Refractory material, by 1000 DEG C of vapor corrosion 100h (vapor and air Volume ratio is 1:4, and stagnation pressure is 1 standard atmospheric pressure), rate of body weight gain is 1.5~4.0%.
Therefore, Al provided by the present invention4SiC4The preparation method of refractory material is fast with synthesis rate, product component is equal Even feature, obtained Al4SiC4Refractory material has the characteristics that vapour resistant corrosivity is strong.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.

Claims (8)

1. a kind of Al4SiC4The preparation method of refractory material, which comprises the following steps: by thermosetting phenolic resin, Metallic aluminium, elemental silicon and alusil alloy are mixed into premix, and the premix is then toasted 24 under the conditions of 120~250 DEG C ~30 hours, then sensed stove heating is reacted and is kept the temperature to get Al under protective atmosphere4SiC4Refractory material, wherein described pre- Al, Si and C molar ratio are 4:1:4~4:1:5 in mixing.
2. Al according to claim 14SiC4The preparation method of refractory material, it is characterised in that: with 3~20 DEG C/min's Rate is increased to 1000~1600 DEG C and carries out heating reaction.
3. Al according to claim 24SiC4The preparation method of refractory material, it is characterised in that: 1000 after heating reaction 0.5~4h is kept the temperature at~1600 DEG C.
4. Al according to any one of claims 1 to 34SiC4The preparation method of refractory material, it is characterised in that: heating reaction After heat preservation, the Residual carbon of thermosetting phenolic resin is more than or equal to 45wt%, and is less than or equal to 60wt%.
5. Al according to any one of claims 1 to 34SiC4The preparation method of refractory material, it is characterised in that: metallic aluminium Al content >=99wt%；Partial size≤38 μm of metallic aluminium.
6. Al according to any one of claims 1 to 34SiC4The preparation method of refractory material, it is characterised in that: elemental silicon Si content >=99wt%；Partial size≤38 μm of elemental silicon.
7. Al according to any one of claims 1 to 34SiC4The preparation method of refractory material, it is characterised in that: alusil alloy Al content >=80wt%, Si content >=18wt%；Partial size≤38 μm of the alusil alloy.
8. a kind of Al according to any one of claims 1 to 74SiC4The Al that the preparation method of refractory material is prepared4SiC4 Refractory material.
CN201811287829.9A 2018-10-31 2018-10-31 A kind of Al4SiC4Refractory material and preparation method Pending CN109467448A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811287829.9A CN109467448A (en) 2018-10-31 2018-10-31 A kind of Al4SiC4Refractory material and preparation method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811287829.9A CN109467448A (en) 2018-10-31 2018-10-31 A kind of Al4SiC4Refractory material and preparation method

Publications (1)

Publication Number Publication Date
CN109467448A true CN109467448A (en) 2019-03-15

Family

ID=65666764

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811287829.9A Pending CN109467448A (en) 2018-10-31 2018-10-31 A kind of Al4SiC4Refractory material and preparation method

Country Status (1)

Country Link
CN (1) CN109467448A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101423215A (en) * 2008-11-27 2009-05-06 中钢集团洛阳耐火材料研究院有限公司 Method for preparing Al4SiC4 powder
JP2014156366A (en) * 2013-02-14 2014-08-28 Nippon Steel & Sumitomo Metal METHOD FOR MANUFACTURING AN Al4SiC4 POWDER, METHOD FOR MANUFACTURING AN MgO-C BRICK, AND MgO-C BRICK
CN105836718A (en) * 2016-04-27 2016-08-10 北京科技大学 Sol-gel method for preparing submicron-order titanium nitride powdery material
CN106747446A (en) * 2016-06-25 2017-05-31 河南工业大学 A kind of Microwave Hybrid Heating synthesizes Al4SiC4The new method of powder
CN106747447A (en) * 2016-06-25 2017-05-31 河南工业大学 One kind synthesis Al4SiC4The new method of powder body material

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101423215A (en) * 2008-11-27 2009-05-06 中钢集团洛阳耐火材料研究院有限公司 Method for preparing Al4SiC4 powder
JP2014156366A (en) * 2013-02-14 2014-08-28 Nippon Steel & Sumitomo Metal METHOD FOR MANUFACTURING AN Al4SiC4 POWDER, METHOD FOR MANUFACTURING AN MgO-C BRICK, AND MgO-C BRICK
CN105836718A (en) * 2016-04-27 2016-08-10 北京科技大学 Sol-gel method for preparing submicron-order titanium nitride powdery material
CN106747446A (en) * 2016-06-25 2017-05-31 河南工业大学 A kind of Microwave Hybrid Heating synthesizes Al4SiC4The new method of powder
CN106747447A (en) * 2016-06-25 2017-05-31 河南工业大学 One kind synthesis Al4SiC4The new method of powder body material

Non-Patent Citations (7)

* Cited by examiner, † Cited by third party
Title
JIN-SEOK LEE: "synthesis of mono-phase, hexagonal plate-like Al4SiC4 powder via a carbothermal reduction process", 《JOURNAL OF THE CERAMIC SOCIETY OF JAPAN》 *
JUN CHEN等: "Microstructures and properties of in situ lamellar Al4SiC4 bonded SiC bricks： the effect of induction heating", 《JOUNAL OF ALLOYS AND COMPOUNDS》 *
WU H等: "influence of fluoropolymer surface wettability on electrowetting display performance", 《DISPLAYS》 *
XIAO MEIXI等: "Spontaneous Infiltration of Aluminium-Silicon Alloy into Silicon-Carbide Preforms in Air", 《JOURNAL OF AMERICAN CERAMIC SOCIETY》 *
许欢等: "感应加热碳热还原合成LaB6粉体", 《人工晶体学报》 *
赵学增等: "《维纳尺度下固液界面流动阻力影响因素的研究》", 30 June 2018, 哈尔滨工业大学出版社 *
韩喆 等: "《金属材料与热处理》", 31 December 2013, 冶金工业出版社 *

Similar Documents

Publication Publication Date Title
CN103073320B (en) Preparation method for ZrB2-SiC (w) ceramic raw material
CN103717764A (en) Method for recovering rare earth element
CN103754891B (en) The method of a kind of boron/carbothermic method low-temperature growth hafnium boride powder
CN106276941B (en) A kind of preparation method of boronation molybdenum powder
CN106966599B (en) A kind of structure gradient tailing microcrystal glass and preparation method thereof using microwave heating preparation
CN108677075A (en) A kind of preparation method of stirring friction welding agitator head material and stirring-head
CN102225761B (en) TiC material with Ti-Si-Fe alloy as raw material and preparation method thereof
CN105236363A (en) Method for preparing micrometer/nanometer spherical silicon nitride powder
CN112851355A (en) Pressureless sintering silicon carbide bulletproof ceramic and preparation method thereof
CN106744960B (en) A method of oxidation of coal titanium or/and titanium carbide are prepared with carburetted hydrogen gas reduction
CN107974569A (en) A kind of preparation method of aluminium based composite material enhanced by miscellaneous granules
CN109665848A (en) A kind of superhigh temperature SiC-HfB2Composite ceramics and its preparation method and application
CN109467448A (en) A kind of Al4SiC4Refractory material and preparation method
JPS60118368A (en) Vane for stirring molten metal
CN109608200A (en) A kind of carbon silicated aluminum combination SiC fire resistant materials and preparation method thereof
CN108840575A (en) A kind of self toughening glass ceramics and preparation method thereof with nanowire crystal structure prepared using microwave technology
CN105483487A (en) Zirconium-containing boron carbide and aluminum alloy composite and preparing method thereof
CN111848178A (en) Method for microwave synthesis of hafnium diboride nano powder by complex sol-gel technology
CN104495845B (en) A kind of pure Fe3the preparation technology of C block
CN107243644A (en) A kind of preparation method of the diamond tool copper-based prealloy powder of ultra-fine quaternary
CN107217204A (en) A kind of preparation method of Fe Mn Al systems alloy
CN110282960A (en) A kind of preparation method of carbon composite refractory
CN105777128A (en) Method for synthesizing hafnium carbide ceramic powder at low temperature through assisting of molten salts and magnesiothermic reduction
CN114807723A (en) Metal ceramic composite coating and preparation method thereof
JP4060803B2 (en) Method for producing zirconium boride powder

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
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20190315