CN108467273A - Ternary layered Ti3AlCN ceramics and preparation method thereof - Google Patents
Ternary layered Ti3AlCN ceramics and preparation method thereof Download PDFInfo
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- CN108467273A CN108467273A CN201810549934.9A CN201810549934A CN108467273A CN 108467273 A CN108467273 A CN 108467273A CN 201810549934 A CN201810549934 A CN 201810549934A CN 108467273 A CN108467273 A CN 108467273A
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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
- C04B35/515—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
- C04B35/58—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 borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides
- C04B35/58007—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 borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on refractory metal nitrides
- C04B35/58014—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 borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on refractory metal nitrides based on titanium nitrides, e.g. TiAlON
- C04B35/58021—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 borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on refractory metal nitrides based on titanium nitrides, e.g. TiAlON based on titanium carbonitrides
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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
- 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
- C04B2235/38—Non-oxide ceramic constituents or additives
- C04B2235/3852—Nitrides, e.g. oxynitrides, carbonitrides, oxycarbonitrides, lithium nitride, magnesium nitride
- C04B2235/3865—Aluminium nitrides
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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
- 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
- C04B2235/422—Carbon
- C04B2235/425—Graphite
Abstract
The present invention relates to Material Fields, in particular to a kind of ternary layered Ti3AlCN ceramics and preparation method thereof.This prepares ternary layered Ti3The method of AlCN ceramics, including：300 mesh will be taken to the mixed-powder between 400 mesh after uniformly mixed titanium valve, aluminum nitride powder, graphite powder sieving；Mixed-powder is sintered 1.5 2.5 hours at 1,400 1600 degrees Celsius；Wherein, titanium valve, aluminum nitride powder, graphite powder molar ratio be 3:1.0‑1.5:1.Using the proportioning, it is sintered 1.5 2.5 hours at 1,400 1600 degrees Celsius, the Ti of layer structure can be obtained3AlCN ceramics, and grain diameter span is small, and particle is few.The preparation method is easy to operate, and feasibility is strong, is conducive to promote and apply.
Description
Technical field
The present invention relates to Material Fields, in particular to a kind of ternary layered Ti3AlCN ceramics and preparation method thereof.
Background technology
Ti3AlCN ceramics are a kind of high rigidity, and department of chemistry stablizes good ceramic kind.
Fusing point is high, and good heat conductivity, hardness is big, and chemical stabilization is good, does not hydrolyze, and high-temperature oxidation resistance is good, at normal temperatures not
It reacts with acid, but can be dissolved in the mixed acid of nitric acid and hydrofluoric acid, nitride is formed in nitrogen atmosphere in 1000 DEG C.
It is the important source material of CEMENTED CARBIDE PRODUCTION, and there is good mechanical property, can be used for manufacturing wear-resistant material, cutting
Cutter material, machine components etc. can also make the crucible of the metals such as melting tin, lead, cadmium, zinc.In addition, transparent silicon carbide titanium ceramics are again
It is good optical material.
In the prior art, common about Ti3The standby method of AlCN ceramic systems mainly has spraying, magnetron sputtering, tube furnace
Sintering, the methods of hot pressing, HIP sintering.
But the Ti that these common preparation methods are prepared in the prior art3AlCN ceramics are unable to get normal phase,
Particle grows up to non-laminar structure, and grain diameter span is big, and particle is more.
Invention content
Ternary layered Ti is prepared the purpose of the present invention is to provide a kind of3The method of AlCN ceramics, this method is easy to operate,
Feasibility is strong, can obtain the Ti of layer structure3AlCN ceramics.
Another object of the present invention is to provide a kind of ternary layered Ti3AlCN ceramics, the ceramics are layer structure, and
Grain diameter span is small, and particle is few.
To achieve the goals above, technical solution used in the embodiment of the present invention is as follows：
It is a kind of to prepare ternary layered Ti3The method of AlCN ceramics, including：By uniformly mixed titanium valve, aluminum nitride powder, graphite
Take 300 mesh to the mixed-powder between 400 mesh after powder sieving；It is small that mixed-powder is sintered at 1400-1600 degrees Celsius to 1.5-2.5
When；Wherein, titanium valve, aluminum nitride powder, graphite powder molar ratio be 3:1.0-1.5:1.
A kind of ternary layered Ti3AlCN ceramics, ternary layered Ti is prepared using above-mentioned3The method of AlCN ceramics is prepared into
It arrives.
The beneficial effects of the invention are as follows：
It is provided by the invention a kind of to prepare ternary layered Ti3The method of AlCN ceramics, including：By uniformly mixed titanium valve,
Take 300 mesh to the mixed-powder between 400 mesh after aluminum nitride powder, graphite powder sieving；By mixed-powder at 1400-1600 degrees Celsius
Sintering 1.5-2.5 hours；Wherein, titanium valve, aluminum nitride powder, graphite powder molar ratio be 3:1.0-1.5:1.Using the proportioning,
1400-1600 degrees Celsius is sintered 1.5-2.5 hours, can obtain the Ti of layer structure3AlCN ceramics, and grain diameter span
Small, particle is few.The preparation method is easy to operate, and feasibility is strong, is conducive to promote and apply.
A kind of ternary layered Ti provided by the invention3AlCN ceramics, ternary layered Ti is prepared using above-mentioned3AlCN ceramics
Method be prepared.The Ti3AlCN ceramic structures are stratiform, and grain diameter span is small, and particle is few.
Description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the ternary layered Ti that 1-5 of the embodiment of the present invention is prepared3The XRD spectrum of AlCN ceramics；
Fig. 2 is the Ti that comparative example 3 provides3The XRD spectrum of AlCN ceramics；
Fig. 3 is the ternary layered Ti that 1-5 of the embodiment of the present invention is prepared3The SEM of AlCN ceramics schemes；
Fig. 4 is the Ti that comparative example 2 provides3The SEM of AlCN ceramics schemes；
Fig. 5 is the Ti that comparative example 3 provides3The SEM of AlCN ceramics schemes.
Specific implementation mode
Embodiment of the present invention is described in detail below in conjunction with embodiment, but those skilled in the art will
Understand, the following example is merely to illustrate the present invention, and is not construed as limiting the scope of the invention.It is not specified in embodiment specific
Condition person carries out according to conventional conditions or manufacturer's recommended conditions.Reagents or instruments used without specified manufacturer is
The conventional products that can be obtained by commercially available purchase.
In the description of the present invention, it should be noted that term " first ", " second " etc. are only used for distinguishing description, without
It can be interpreted as indicating or implying relative importance.
Below to the ternary layered Ti of the embodiment of the present invention3AlCN ceramics and preparation method thereof are specifically described.
It is provided in an embodiment of the present invention a kind of to prepare ternary layered Ti3The method of AlCN ceramics, including：
S1, titanium valve, aluminum nitride powder, graphite powder are mixed.
Further, titanium valve, aluminum nitride powder, graphite powder molar ratio be 3:1.0-1.5:1.
Using the proportioning, it is sintered 1.5-2.5 hours at 1400-1600 degrees Celsius, the Ti of layer structure can be obtained3AlCN
Ceramics, and grain diameter span is small, and particle is few.
Still optionally further, titanium valve, aluminum nitride powder, graphite powder molar ratio be 3:1.1-1.3:1.
Further, in the present embodiment, the molar ratio selection of above-mentioned titanium valve, aluminum nitride powder, graphite powder is set as 3:
1.2:1。
Specifically, in operation, the molar ratio of above-mentioned titanium valve, aluminum nitride powder, graphite powder is converted into mass ratio, according to
Quality after precise than mixing.
S2, titanium valve, aluminum nitride powder and graphite powder are uniformly mixed.
Uniformly mixed titanium valve, aluminum nitride powder and graphite powder be by by ball milling be added to titanium valve, aluminum nitride powder with
And it obtains for batch mixing 5-8 hours on batch mixer in graphite powder.
Further, batch mixing is mixed on batch mixer after mixing mixed raw material and ball milling；Ball milling with it is mixed
The volume ratio for closing raw material is 1:3.
Further, mixed raw material is contained in mixing bottle when ball milling；Wherein, the total height of mixed raw material and ball milling
For mixing bottle height half between 3/4ths.
Further, the mixing bottle of mixing bottle selection plastic material.
By by above-mentioned titanium valve, aluminum nitride powder and graphite powder mix, can by mixed titanium valve, aluminum nitride powder with
And graphite powder is uniformly mixed, to provide advantageous guarantee for subsequent sintering.
Specifically, in the present embodiment, aforementioned load weighted titanium valve, aluminum nitride powder and graphite powder are put into rotation mouth plastics
In mixing bottle, make the half that the total height of titanium valve, aluminum nitride powder and graphite powder is body between 3/4ths.By ball
Mill is added in rotation mouth plastic bottle, is placed on batch mixer, batch mixing 6 hours.
It is S3, titanium valve, aluminum nitride powder and graphite powder is also small to uniform mixed raw material ball milling 10-15 after mixing
When.
Further, ball milling is that mixed raw material is contained in ball grinder, and alcohol is added and carries out ball milling.
Specifically, in the present embodiment, the mixture of ball milling and raw material is put into ball grinder, alcohol is added, with 300 turns
Speed per minute, ball milling 12 hours.
By ball milling, the grain size of above-mentioned titanium valve, aluminum nitride powder and graphite powder can further be ground, to obtain
The more tiny raw mixture of grain size is obtained, the Ti for obtaining layer structure is further helped to3AlCN ceramics.
It should be noted that when above-mentioned ball milling raw mixture, it is also an option that this field other common be applicable to
The liquid added when batch mixing is not limited to the present embodiment the alcohol of offer.
Also mixed raw material is dried after S4, ball milling.
Further, contain alcohol in the mixed raw material that ball milling is completed, drying material mixture makes alcohol volatilize, into one
Step ground provides advantageous guarantee for the sintering of follow-up raw material.
S5, sieving.
It is also sieved after titanium valve, aluminum nitride powder and graphite powder are dried.Take 300 mesh between 400 mesh after sieving
Mixed-powder.
S6, sintering.
Uniformly mixed titanium valve, aluminum nitride powder, graphite powder are sintered 1.5-2.5 hours at 1400-1600 degrees Celsius.
Further, in this embodiment, it selects uniformly mixed titanium valve, aluminum nitride powder, graphite powder at 1500 degrees Celsius
Sintering 2 hours.
It, can by the way that above-mentioned uniformly mixed titanium valve, aluminum nitride powder, graphite powder to be sintered 2 hours at 1500 degrees Celsius
Obtain the Ti of layer structure3AlCN ceramics.
Further, sintering is that mixed raw material is put into corundum boat, is sintered under conditions of Ar is protected.
Some embodiments of the present invention also provide a kind of ternary layered Ti3AlCN ceramics, using above-mentioned preparation ternary
Stratiform Ti3The method of AlCN ceramics is prepared.
The Ti3AlCN ceramic structures are stratiform, and grain diameter span is small, and particle is few.
The feature and performance of the present invention are described in further detail with reference to embodiments：
Embodiment 1
A kind of ternary layered Ti provided in this embodiment3AlCN ceramics, the ternary layered Ti3AlCN ceramics are to be prepared
's：
(1) material molar ratio:Ti:AlN:C=3:1.2:1, it is scaled mass ratio.Weigh appropriate titanium valve, aluminum nitride powder, stone
Ink is put into rotation mouth plastic bottle, makes the height of raw material total amount in the half of body height.
(2) batch mixing：Ball material volume ratio 1:3.Ball milling is added in rotation mouth plastic bottle, is placed on batch mixer, batch mixing 6 is small
When.
(3) ball milling：The mixture of ball milling and raw material is put into ball grinder, alcohol is added, with 300 rpms of speed
Degree, ball milling 12 hours.
(4) it dries：The mixture drying of alcohol will be mixed.
(5) it is sieved：Sieve of the mixed raw material through -400 mesh of 300 mesh.300 mesh to the powder between 400 mesh is taken to make
For raw materials for sintering.
(6) it is sintered：The raw material handled well is put into corundum boat, then places them into tube furnace, under conditions of Ar protections
1500 DEG C are sintered 2 hours.
Embodiment 2
A kind of ternary layered Ti provided in this embodiment3AlCN ceramics, the ternary layered Ti3AlCN ceramics are to be prepared
's：
(1) material molar ratio:Ti:AlN:C=3:1.0:1, it is scaled mass ratio.Weigh appropriate titanium valve, aluminum nitride powder, stone
Ink is put into rotation mouth plastic bottle, makes the height of raw material total amount 3/4ths of body height.
(2) batch mixing：Ball material volume ratio 1:3.Ball milling is added in rotation mouth plastic bottle, is placed on batch mixer, batch mixing 5 is small
When.
(3) ball milling：The mixture of ball milling and raw material is put into ball grinder, alcohol is added, with 300 rpms of speed
Degree, ball milling 10 hours.
(4) it dries：The mixture drying of alcohol will be mixed.
(5) it is sieved：Sieve of the mixed raw material through -400 mesh of 300 mesh.300 mesh to the powder between 400 mesh is taken to make
For raw materials for sintering.
(6) it is sintered：The raw material handled well is put into corundum boat, then places them into tube furnace, under conditions of Ar protections
1600 DEG C are sintered 2.5 hours.
Embodiment 3
A kind of ternary layered Ti provided in this embodiment3AlCN ceramics, the ternary layered Ti3AlCN ceramics are to be prepared
's：
(1) material molar ratio:Ti:AlN:C=3:1.5:1, it is scaled mass ratio.Weigh appropriate titanium valve, aluminum nitride powder, stone
Ink is put into rotation mouth plastic bottle, makes the height of raw material total amount 3/4ths of body height.
(2) batch mixing：Ball material volume ratio 1:3.Ball milling is added in rotation mouth plastic bottle, is placed on batch mixer, batch mixing 8 is small
When.
(3) ball milling：The mixture of ball milling and raw material is put into ball grinder, alcohol is added, with 300 rpms of speed
Degree, ball milling 15 hours.
(4) it dries：The mixture drying of alcohol will be mixed.
(5) it is sieved：Sieve of the mixed raw material through -400 mesh of 300 mesh.300 mesh to the powder between 400 mesh is taken to make
For raw materials for sintering.
(6) it is sintered：The raw material handled well is put into corundum boat, then places them into tube furnace, under conditions of Ar protections
1600 DEG C are sintered 2.1 hours.
Embodiment 4
A kind of ternary layered Ti provided in this embodiment3AlCN ceramics, the ternary layered Ti3AlCN ceramics are to be prepared
's：
(1) material molar ratio:Ti:AlN:C=3:1.1:1, it is scaled mass ratio.Weigh appropriate titanium valve, aluminum nitride powder, stone
Ink is put into rotation mouth plastic bottle, makes the height of raw material total amount 3/8ths of body height.
(2) batch mixing：Ball material volume ratio 1:3.Ball milling is added in rotation mouth plastic bottle, is placed on batch mixer, batch mixing 7 is small
When.
(3) ball milling：The mixture of ball milling and raw material is put into ball grinder, alcohol is added, with 300 rpms of speed
Degree, ball milling 11 hours.
(4) it dries：The mixture drying of alcohol will be mixed.
(5) it is sieved：Sieve of the mixed raw material through -400 mesh of 300 mesh.300 mesh to the powder between 400 mesh is taken to make
For raw materials for sintering.
(6) it is sintered：The raw material handled well is put into corundum boat, then places them into tube furnace, under conditions of Ar protections
1550 DEG C are sintered 2.2 hours.
Embodiment 5
A kind of ternary layered Ti provided in this embodiment3AlCN ceramics, the ternary layered Ti3AlCN ceramics are to be prepared
's：
(1) material molar ratio:Ti:AlN:C=3:1.3:1, it is scaled mass ratio.Weigh appropriate titanium valve, aluminum nitride powder, stone
Ink is put into rotation mouth plastic bottle, makes the height of raw material total amount 3/8ths of body height.
(2) batch mixing：Ball material volume ratio 1:3.Ball milling is added in rotation mouth plastic bottle, is placed on batch mixer, batch mixing 7.5 is small
When.
(3) ball milling：The mixture of ball milling and raw material is put into ball grinder, alcohol is added, with 300 rpms of speed
Degree, ball milling 13 hours.
(4) it dries：The mixture drying of alcohol will be mixed.
(5) it is sieved：Sieve of the mixed raw material through -400 mesh of 300 mesh.300 mesh to the powder between 400 mesh is taken to make
For raw materials for sintering.
(6) it is sintered：The raw material handled well is put into corundum boat, then places them into tube furnace, under conditions of Ar protections
1450 DEG C are sintered 2.3 hours.
Comparative example 1
Ti made from heat spraying method is used in the prior art3AlCN ceramics.
Comparative example 2
Material molar ratio:Ti:AlN:C=3:1:1, be not sieved Ti obtained3The SEM of AlCN schemes
Comparative example 3
Material molar ratio:Ti:AlN:C=3:1.2:1, unsifted Ti3The SEM of AlCN schemes
The ternary layered Ti that embodiment 1-5 is prepared3The Ti that AlCN ceramics and comparative example 1-2 are provided3AlCN ceramics
Investigate its structure.
Experimental example：
1, the ternary layered Ti that embodiment 1-5 is prepared using XRD3The structure of AlCN ceramics is detected, as a result
Such as attached drawing 1.
The Ti that comparative example 1 is provided using XRD3The structure of AlCN ceramics is detected, as a result such as attached drawing 2.
It will be seen from figure 1 that ternary layered Ti prepared by the present embodiment 1-53AlCN ceramics have obtained TiAlCN phases.
From attached drawing 2 as can be seen that the Ti that comparative example 1 provides3AlCN ceramics are unable to get normal TiAlCN phases.
2, the ternary layered Ti that embodiment 1-5 is prepared using SEM3The structure of AlCN ceramics is detected, as a result
Such as Fig. 3.
The Ti that comparative example 2-3 is provided using SEM3The structure of AlCN ceramics is detected, as a result such as Fig. 4-5.
From figure 3, it can be seen that the ternary layered Ti that the present embodiment 1-5 is prepared3The long layered of AlCN ceramic particles
Structure, and grain diameter span is small, substantially without particle.
From the Ti that can be seen that the offer of comparative example 2 and 3 in Fig. 4-53AlCN ceramics are unable to get normal phase, and particle grows up to
Non-laminar structure, and grain diameter span is big, and particle is more.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of preparing ternary layered Ti3The method of AlCN ceramics, which is characterized in that including：
300 mesh will be taken to the mixed-powder between 400 mesh after uniformly mixed titanium valve, aluminum nitride powder, graphite powder sieving；
The mixed-powder is sintered 1.5-2.5 hours at 1400-1600 degrees Celsius；
Wherein, the titanium valve, the aluminum nitride powder, the graphite powder molar ratio be 3:1.0-1.5:1.
2. preparing ternary layered Ti as described in claim 13The method of AlCN ceramics, which is characterized in that
The titanium valve, the aluminum nitride powder, the graphite powder molar ratio be 3:1.1-1.3:1.
3. preparing ternary layered Ti as described in claim 13The method of AlCN ceramics, which is characterized in that
Uniformly mixed titanium valve, aluminum nitride powder, graphite powder are sintered 2 hours at 1500 degrees Celsius.
4. as described in any one of claims 1-3 prepare ternary layered Ti3The method of AlCN ceramics, which is characterized in that
The uniformly mixed titanium valve, the aluminum nitride powder and the graphite powder is by the way that ball milling is added to the titanium
It obtains within batch mixing 5-8 hours on batch mixer in powder, the aluminum nitride powder and the graphite powder；
Wherein, the volume ratio of ball milling and mixed raw material is 1:3.
5. preparing ternary layered Ti as claimed in claim 43The method of AlCN ceramics, which is characterized in that
By the titanium valve, the aluminum nitride powder and the graphite powder after mixing also to the uniform mixed raw material ball milling
10-15 hours.
6. preparing ternary layered Ti as claimed in claim 53The method of AlCN ceramics, which is characterized in that
Ball milling is that the mixed raw material is contained in ball grinder, and alcohol is added and carries out ball milling.
7. preparing ternary layered Ti as claimed in claim 53The method of AlCN ceramics, which is characterized in that
Also the mixed raw material is dried after ball milling.
8. preparing ternary layered Ti as claimed in claim 73The method of AlCN ceramics, which is characterized in that
It is to be sieved after the drying by the uniformly mixed titanium valve, the aluminum nitride powder, graphite powder sieving.
9. preparing ternary layered Ti as described in claim 13The method of AlCN ceramics, which is characterized in that
Sintering is that the mixed raw material is put into corundum boat, is sintered under conditions of Ar is protected.
10. a kind of ternary layered Ti3AlCN ceramics, which is characterized in that prepare three using such as claim 1-9 any one of them
First stratiform Ti3The method of AlCN ceramics is prepared.
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| CN109704769A (en) * | 2018-11-29 | 2019-05-03 | 西南交通大学 | Magnetic MAX phase ceramics and preparation method thereof |
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| CN114920566A (en) * | 2022-05-18 | 2022-08-19 | 中国科学技术大学 | Carbonitride two-dimensional nanosheet and preparation method and application thereof |
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Application publication date: 20180831 |