CN106241775B - A kind of graphite material, its feedstock composition, Its Preparation Method And Use - Google Patents

A kind of graphite material, its feedstock composition, Its Preparation Method And Use Download PDF

Info

Publication number
CN106241775B
CN106241775B CN201510848610.1A CN201510848610A CN106241775B CN 106241775 B CN106241775 B CN 106241775B CN 201510848610 A CN201510848610 A CN 201510848610A CN 106241775 B CN106241775 B CN 106241775B
Authority
CN
China
Prior art keywords
graphite
material
deg
purposes
cm
Prior art date
Application number
CN201510848610.1A
Other languages
Chinese (zh)
Other versions
CN106241775A (en
Inventor
仲亚娟
林俊
姜海涛
朱智勇
Original Assignee
中国科学院上海应用物理研究所
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 中国科学院上海应用物理研究所 filed Critical 中国科学院上海应用物理研究所
Priority to CN201510848610.1A priority Critical patent/CN106241775B/en
Publication of CN106241775A publication Critical patent/CN106241775A/en
Application granted granted Critical
Publication of CN106241775B publication Critical patent/CN106241775B/en

Links

Abstract

The invention discloses a kind of graphite materials, its feedstock composition, Its Preparation Method And Use.Graphite material of the invention, raw material include natural flake graphite, artificial graphite and mesocarbon microspheres, and preparation method includes the following steps: that feedstock composition is uniformly mixed by (1), obtains matrix graphite powder;(2) the compacting matrix graphite powder, obtains green body;(3) green body is carbonized, purification process, obtains graphite material.The average pore size of the material is small, compression strength is high, thermal conductivity is high, thermal expansion coefficient is low, and degree of anisotropy is low, the material suitable for basis material, outer shell in reactor as fuel element fuel bed;And its preparation process is simple, it is at low cost.

Description

A kind of graphite material, its feedstock composition, Its Preparation Method And Use

Technical field

The present invention relates to a kind of graphite materials, its feedstock composition, Its Preparation Method And Use.

Background technique

The preparation section of conventional graphite material is more, complex process.Generally use charcoal aggregate (such as artificial graphite, natural stone Ink etc.) with binder be raw material, be mixed in a certain ratio.Through processes such as kneading, extrusion, broken and screenings, it is former that powder is first made Material.Powder material is molded or is waited again static pressure (or quasi-iso static pressing) technique green body is made.Then according to actual heat treatment needs, Green body is subjected to charing process and further graphitization processing, obtains required product.

For the spheric fuel element matrix graphite of high temperature gas cooled reactor, raw material is the natural scale that mass fraction is 64% Matrix stone is made by techniques such as kneading, extrusion, broken and screenings in graphite, 16% artificial graphite and 20% phenolic resin Ink powder.To obtain the isotropic graphite suitable for reactor, quasi-iso static pressing technique is used in preparation process.Cladding is fired first Material particle is mixed with matrix graphite powder, is pressed into fuel core using quasi-iso static pressing.Use quasi-iso static pressing technique by fuel again Core packet is depressed into the matrix graphite spherical shell of thickness about 5mm, through charing purifying heat treatment, obtains spheric fuel element.Such combustion The shortcomings that when expecting that element is used for fused salt cooled reactor, it is big that there are volume densitys, is unfavorable for element floating online loading and unloading.In addition, Its outer shell graphite aperture is distributed in 1 μm or so, be unfavorable for obstruct coolant fused salt infiltration (M.W.Rosenthal, P.N.Haubenreich, R.B.Briggs.The development status of molten-salt breeder Reactors.ORNL-4812.1972. report: for barrier fused salt infiltration, aperture should be controlled at 1 μm or less).Therefore this field needs Enhancing density is carried out to above-mentioned fuel element matrix graphite, its compactness can be improved, makes that it is suitable for molten salt reactor.

In the huge family of carbon material, Carbonaceous mesophase is the high-quality presoma for preparing high-performance carbon material product, Product high-performance composite materials, ultra high power graphite electrode and in terms of succeed and answer With.But controlling it into charcoal process and volume contraction is to prepare the critical issue of Carbonaceous mesophase foundation stone ink material.Intermediate-phase carbon is micro- Ball (MCMBs) form is spherical in shape and has certain distribution of particles, is easy to realize under stress tightly packed.Contain suitable in its surface The β component (Toluene Insoluble-Quinoline Soluble Fraction) of amount, thus there is binder free self-adhesion The characteristic of knot.The green body of molding or isostatic pressing occurs in heat treatment from agglomeration, and product volume shrinking percentage is up to 40%.Therefore, it is mixed with other materials or compound tense, be easy because volume contraction it is inconsistent caused by blank cracking or layering etc. Problem.

Summary of the invention

The technical problem to be solved by the present invention is in order to overcome, existing graphite material average pore size is big, compression strength is low The defects of complicated with preparation process, and provide a kind of graphite material, its feedstock composition, Its Preparation Method And Use.It should The average pore size of material is small, compression strength is high, thermal conductivity is high, thermal expansion coefficient is low, and degree of anisotropy is low, is suitable in reactor As the basis material of fuel element fuel bed, the material of outer shell;And its preparation process is simple, it is at low cost.

The present invention provides a kind of feedstock compositions for being used to prepare graphite material comprising natural flake graphite, artificial Graphite and mesocarbon microspheres.

Preferably, by percentage to the quality, the feedstock composition includes natural scale stone described in 75%-85% Mesocarbon microspheres described in ink, artificial graphite and 5%-10% described in 10%-15%.More preferably, by percentage to the quality, The feedstock composition includes natural flake graphite described in 80%, described in artificial graphite described in 12.5% and 7.5% Mesocarbon microspheres.

Preferably, the feedstock composition by the natural flake graphite, the artificial graphite and it is described in Between phase carbon microspheres form.

Wherein, the mesocarbon microspheres can be the mesocarbon microspheres of this field routine, preferably purchased from Japan The mesocarbon microspheres of Osaka gas company.The parameter of the mesocarbon microspheres is preferably: average grain diameter is 3.2 μm, density 1.4-1.5g/cm3(such as 1.47g/cm3), approximate carbon content is 93wt%-95wt%, and hydrogen content is 4wt%-5wt% keeps spherical shape not to melt, increases with heat treatment temperature during heat treatment, and hydrogen amount decline, 600 DEG C or less are in Between phase structure, 600 DEG C or more occur Carbonaceous mesophase property and structure variation, 700 DEG C or more become solid, in 500-1000 During DEG C, density is gradually by 1.5g/cm3Increase to 1.9g/cm3

Wherein, the natural flake graphite can be the natural flake graphite of this field routine, preferably be purchased from middle steel The natural flake graphite of group's new material (Zhejiang) Co., Ltd.The parameter of the natural flake graphite is preferably: pine Dress density is 0.52-0.53g/cm3, granularity D50 is 19-23 μm, moisture content 0.02%, real density 2.258-2.275g/cm3

Wherein, the artificial graphite can be the artificial graphite of this field routine, and it is novel to be preferably purchased from Sinosteel Corporation The artificial graphite of material (Zhejiang) Co., Ltd.The parameter of the artificial graphite is preferably: apparent density 0.55g/ cm3, granularity D50 is 18-22 μm, moisture content 0.02%, real density 2.235-2.258g/cm3

Preferably, the feedstock composition further includes binder.

More preferably, by percentage to the quality, the feedstock composition includes natural scale stone described in 55%-65% Artificial graphite described in ink, 5%-15%, mesocarbon microspheres described in binder and 5%-10% described in 15%-25%. Most preferably, by percentage to the quality, the feedstock composition include 64% natural flake graphite, 10% artificial graphite, 20% binder and 6% mesocarbon microspheres.

More preferably, the feedstock composition is by the natural flake graphite, the artificial graphite, the centre Phase carbon microspheres and binder composition.

Wherein, the binder can be the binder of this field routine (in order to improve the intensity of green compact or prevent powder End is segregated and is added to the substance that can be removed before sintering or in sintering process in powder), such as coal tar, coal tar pitch, phenol One of urea formaldehyde, epoxy resin, carbolineum, mesophase pitch and phenolic resin are a variety of, preferably mesophase pitch and/ Or phenolic resin.

Wherein, the mesophase pitch can be the mesophase pitch of this field routine, preferably be purchased from The naphthalene mesophase pitch of Mitsubishi Gas Chemical Co..The parameter of the mesophase pitch is preferably: soft Change 260 DEG C of point.

Wherein, the phenolic resin can be the phenolic resin of this field routine, preferably be purchased from Shanghai China chemical industry The phenolic resin of Materials Co., Ltd.The model of the phenolic resin is preferably PF211.The phenolic resin is preferably For Powdered phenolic resins.The phenolic resin is preferably thermoplastic phenolic resin.The parameter of the phenolic resin compared with Goodly are as follows: molecular weight 690,101 DEG C of softening point, 97 DEG C of fusing point, pH value 6, carbon left 50wt%, gray scale (ppm) is 1.

A kind of preparation method of graphite material comprising following step:

(1) above-mentioned feedstock composition is uniformly mixed, obtains matrix graphite powder;

(2) the compacting matrix graphite powder, obtains green body;

(3) green body is carbonized, purification process, obtains graphite material.

In the step (1), the described mixing can be the mixing of graphite material field routine, for example, containing kneading, Extrusion, broken and screening step mixing.

In the step (2), the compacting can be the compacting of graphite material field routine, those skilled in the art Mold shape, size and the method for compacting, pressure and other parameters can be determined according to the target shape and purposes of the graphite material. The method of the compacting can for etc. static pressure suppressions, quasi-iso static pressing compacting or single way stempressing compacting.The pressure of the compacting It can be selected in 30-250MPa range according to density requirements.Such as the drawing method of sizing molding can be used in the material of sheet.

In the step (3), the charing can be the charing of this field routine, and temperature is preferably 600- 1000 DEG C, such as 800 DEG C.

In the step (3), the purifying can be the purifying of this field routine, and temperature is preferably 1850- 1950℃。

The present invention also provides a kind of graphite materials, are made according to the preparation method of above-mentioned graphite material.

The present invention also provides above-mentioned graphite materials in reactor as the basis material of fuel element fuel bed Purposes.

The purposes that the present invention also provides above-mentioned graphite materials in reactor as the material of fuel jacket layer.

Without prejudice to the field on the basis of common sense, above-mentioned each optimum condition, can any combination to get the present invention it is each preferably Example.

In the present invention, unless otherwise instructed, term " mesocarbon microspheres " refer to particle diameter distribution at 1~100 μm, it is spherical in shape Or spheroid shape, pass through the isolated carbon microspheres of solvent.

In the present invention, unless otherwise instructed, term " phenolic resin " refers to by phenol or fortified phenol, and life is reacted with formaldehyde At high molecular material.

In the present invention, unless otherwise instructed, term " mesophase pitch " refers to by heavy arene substance heat treated A kind of liquid crystal material of the nematic being made of discoid or rodlike molecule generated in journey, raw material can be coal tar drip Green, asphalt and pure aromatics substance and their mixture.

In the present invention, unless otherwise instructed, term " artificial graphite " refers to that with the high-quality calcined petroleum coke of powdery be main Raw material is compressed into shape, then be heat-treated after mixing through 2500-3000 DEG C, is obtained after graphitization using pitch as binder Material.

In the present invention, unless otherwise instructed, term " natural flake graphite " refers to the natural graphite of layer structure.

The reagents and materials used in the present invention are commercially available.

The positive effect of the present invention is that: the average pore size of the material is small, compression strength is high, thermal conductivity is high, heat is swollen Swollen coefficient is low, and degree of anisotropy is low, the material suitable for basis material, outer shell in reactor as fuel element fuel bed Material;And its preparation process is simple, it is at low cost.

Specific embodiment

The present invention is further illustrated below by the mode of embodiment, but does not therefore limit the present invention to the reality It applies among a range.In the following examples, the experimental methods for specific conditions are not specified, according to conventional methods and conditions, or according to quotient The selection of product specification.

In the embodiment of the present invention, mesocarbon microspheres is purchased from Japanese Osaka gas company, parameter are as follows: average grain Diameter is 3.2 μm, density 1.4-1.5g/cm3(such as 1.47g/cm3), approximate carbon content is 93wt%-95wt%, hydrogen content It for 4wt%-5wt%, keeps spherical shape not melt during heat treatment, is increased with heat treatment temperature, hydrogen amount decline, 600 DEG C or less are in Mesophase structure, the variation of 600 DEG C or more generation Carbonaceous mesophase property and structure, 700 DEG C or more become solid, in 500- During 1000 DEG C, density is gradually by 1.5g/cm3Increase to 1.9g/cm3

In the embodiment of the present invention, natural flake graphite is purchased from Sinosteel Corporation's new material (Zhejiang) Co., Ltd, parameter Are as follows: apparent density 0.52-0.53g/cm3, granularity D50 is 19-23 μm, moisture content 0.02%, real density 2.258- 2.275g/cm3

In the embodiment of the present invention, artificial graphite is purchased from Sinosteel Corporation's new material (Zhejiang) Co., Ltd, parameter are as follows: pine Dress density is 0.55g/cm3, granularity D50 is 18-22 μm, moisture content 0.02%, real density 2.235-2.258g/cm3

In the embodiment of the present invention, mesophase pitch is purchased from Mitsubishi Gas Chemical Co. (Mitsubishi's gas chemistry Co., Ltd.), parameter are as follows: 260 DEG C of softening point.

In the embodiment of the present invention, phenolic resin is purchased from Shanghai Huaxia Chemical Materials Co., Ltd., model PF211, Parameter are as follows: molecular weight 690,101 DEG C of softening point, 97 DEG C of fusing point, pH value 6, carbon left 50wt%, gray scale (ppm) is 1.

In the embodiment of the present invention, mechanical property (compression strength and tensile strength) test uses national standard: GB/T13465.2- 2002 impermeable graphite methods of testing materials;Thermal conductivity test uses laser conductometer (resistance to speed);Pore-size distribution test is using pressure Mercury method, national standard: GB/T 21650.1-2008 mercury injection method and gas determination of adsorption method solid material pore-size distribution and porosity first Part: mercury injection method.

A kind of preparation method of the graphite material of embodiment 1

(1) with mass percent be 64% natural flake graphite, 10% artificial graphite, 20% it is phenolic resin bonded Agent and 6% mesocarbon microspheres are raw material, pass through the techniques such as kneading, extrusion, broken and screening and matrix graphite powder is made;

(2) spherical green body is suppressed using SH (Semihydrostatiche pressverfahren) quasi-iso static pressing method.It will The matrix graphite powder that step (1) obtains is added in quasi-iso static pressing silica gel mould.When being suppressed through 100MPa, in silica gel mould die cavity Quasi-isotropic pressure is generated, so that the material powder in ellipsoidal cavity is pressed into sphere.

(3) green body of step (2) is carbonized, purification process, obtains graphite material.

Preparation of 2 fuel bed of embodiment in the fuel element of innermost layer

(1) SH method quasi-iso static pressing technique is used, coated fuel particles and the mixture of mesocarbon microspheres are suppressed into balling-up Shape, pressing pressure 100MPa.Obtain spherical fuel bed (A);

(2) quasi-iso static pressing technique is used again, fuel bed (A) packet is depressed into no fuel bed (B) raw material, pressing pressure 100MPa.(B) layer raw material is mesocarbon microspheres, is obtained sample (AB), and carried out charing process, carbonization temperature 800 ℃;Heating rate 1 DEG C/min, 800 DEG C constant temperature 1 hour.

(3) quasi-iso static pressing technique is used again, and the sample (AB) obtained by step (2) packet is depressed into outer shell (C) raw material It is interior, pressing pressure 250MPa.(C) layer raw material be 64% natural flake graphite, 10% artificial graphite, 20% phenolic resin With 6% mesocarbon microspheres, the matrix graphite powder as made from the techniques such as kneading, extrusion, broken and screening obtains sample (ABC);

(4) sample (ABC) that step (3) obtains is subjected to charing purification process, carbonization temperature is 800 DEG C, cleansing temp It is 1850 DEG C.Finally obtain the fuel element that matrix graphite has gradient-structure.

The fuel element of diameter 6cm made from embodiment 3

The fuel element of diameter 6cm is made referring to the preparation method of embodiment 2, major parameter is shown in Table 1:

Table 1

The outer shell average pore size of fuel element made from the present embodiment is 500nm, and outer shell compression strength is 60MPa.

Preparation of 1 fuel bed of comparative example in the fuel element of innermost layer

(1) SH method quasi-iso static pressing technique is used, coated fuel particles and the mixture of mesocarbon microspheres are suppressed into balling-up Shape, pressing pressure 100MPa are obtained fuel bed (A);

(2) quasi-iso static pressing technique is used again, fuel bed (A) packet is depressed into no fuel bed (B) raw material, pressing pressure 100MPa, (B) layer raw material are mesocarbon microspheres, are obtained sample (AB).And charing process is carried out, carbonization temperature is 800 DEG C.It rises Warm 1 DEG C/min of rate, 800 DEG C constant temperature 1 hour.

(3) quasi-iso static pressing technique is used again, and the sample (AB) obtained by step (2) packet is depressed into outer shell (C) raw material It is interior, pressing pressure 250MPa, (C) layer raw material be 64% natural flake graphite, 16% artificial graphite, 20% phenolic aldehyde tree Rouge, the matrix graphite powder as made from the techniques such as kneading, extrusion, broken and screening, obtains sample (ABC);

(4) sample (ABC) that step (3) obtains is subjected to charing purification process, carbonization temperature is 800 DEG C, cleansing temp It is 1850 DEG C.Finally obtain the fuel element that matrix graphite has gradient-structure.

The fuel element of diameter 6cm made from comparative example 2

The fuel element of diameter 6cm is made referring to the preparation method of comparative example 1, major parameter is shown in Table 2,

Table 2

The outer shell average pore size of fuel element made from this comparative example is 1 μm, and outer shell compression strength is 40MPa.

Above embodiments and comparative example are only that a specific embodiment of the invention is described, not to of the invention Range is defined, and those skilled in the art can also do numerous modifications and variations on the basis of existing technology, is not being departed from Under the premise of the present invention designs, various modifications and change that this field ordinary engineering and technical personnel makes technical solution of the present invention Into should fall within the scope of protection determined by the claims of the present invention.

Claims (9)

1. a kind of purposes of graphite material in reactor as the basis material of fuel element fuel bed, which is characterized in that institute It states graphite material to be made according to method 1, the method 1 includes the following steps:
(1) feedstock composition is uniformly mixed, obtains matrix graphite powder;
(2) the compacting matrix graphite powder, obtains green body;
(3) green body is carbonized, purification process, obtains graphite material;
Wherein, by percentage to the quality, the feedstock composition include 55-65% natural flake graphite, 5-15% artificial graphite, 15-25% binder and 5-10% mesocarbon microspheres.
2. purposes as described in claim 1, which is characterized in that the parameter of the mesocarbon microspheres are as follows: average grain diameter is 3.2 μm, density be 1.4-1.5 g/cm3, carbon content 93wt%-95wt%, hydrogen content 4wt%-5wt%;
And/or the parameter of the mesocarbon microspheres are as follows: keep spherical shape not melt during heat treatment, with heat treatment temperature liter Height, hydrogen amount decline, 600 DEG C or less are in mesophase structure, 700 DEG C the above are solid, in 500-1000 DEG C of period, density by 1.5 g/cm3Increase to 1.9 g/cm3
And/or the parameter of the natural flake graphite are as follows: apparent density 0.52-0.53g/cm3, granularity D50 is 19-23 μ M, moisture content 0.02%, real density 2.258-2.275g/cm3
And/or the parameter of the artificial graphite are as follows: apparent density is 0.55 g/cm3, granularity D50 is 18-22 μm, and moisture content is 0.02%, real density is 2.235-2.258 g/cm3
3. purposes as described in claim 1, which is characterized in that the binder be coal tar, coal tar pitch, epoxy resin, One of carbolineum, mesophase pitch and phenolic resin are a variety of.
4. purposes as claimed in claim 3, which is characterized in that by percentage to the quality, the feedstock composition includes 64% Natural flake graphite, 10% artificial graphite, 20% binder and 6% mesocarbon microspheres;
And/or the mesophase pitch is the naphthalene mesophase pitch purchased from Mitsubishi Gas Chemical Co., Ltd;
And/or the parameter of the mesophase pitch are as follows: 260 DEG C of softening point;
And/or the model PF211 of the phenolic resin;
And/or the phenolic resin is Powdered phenolic resins.
5. purposes as claimed in claim 3, which is characterized in that the phenolic resin is thermoplastic phenolic resin.
6. purposes as claimed in claim 3, which is characterized in that the parameter of the phenolic resin are as follows: molecular weight 690, softening 101 DEG C of point, 97 DEG C of fusing point, pH value 6, carbon left 50wt%, gray scale is 1 ppm.
7. purposes as described in claim 1, which is characterized in that in the step (1), the mixing contain kneading, Extrusion, broken and screening step;
And/or in the step (2), the static pressure suppressions such as the method for the compacting is, quasi-iso static pressing compacting or unidirectional mould Pressure compacting;
And/or in the step (2), the pressure of the compacting is 30-250 MPa;
And/or in the step (3), the temperature of the charing is 600-1000 DEG C;
And/or in the step (3), the temperature of the purifying is 1850-1950 DEG C.
8. purposes as claimed in claim 7, which is characterized in that in the step (3), the temperature of the charing is 800 ℃。
9. a kind of purposes of graphite material in reactor as the material of fuel jacket layer, which is characterized in that the stone Ink material is made according to the method 1 that any one of claim 1-8 is recorded.
CN201510848610.1A 2015-11-27 2015-11-27 A kind of graphite material, its feedstock composition, Its Preparation Method And Use CN106241775B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510848610.1A CN106241775B (en) 2015-11-27 2015-11-27 A kind of graphite material, its feedstock composition, Its Preparation Method And Use

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510848610.1A CN106241775B (en) 2015-11-27 2015-11-27 A kind of graphite material, its feedstock composition, Its Preparation Method And Use

Publications (2)

Publication Number Publication Date
CN106241775A CN106241775A (en) 2016-12-21
CN106241775B true CN106241775B (en) 2019-02-26

Family

ID=57626934

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510848610.1A CN106241775B (en) 2015-11-27 2015-11-27 A kind of graphite material, its feedstock composition, Its Preparation Method And Use

Country Status (1)

Country Link
CN (1) CN106241775B (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101079510A (en) * 2007-06-25 2007-11-28 中南大学 A super capacitance cell
CN101318648A (en) * 2008-07-10 2008-12-10 深圳市贝特瑞新能源材料股份有限公司 Process and equipment for producing graphite dust
CN102502594A (en) * 2011-10-14 2012-06-20 上海理工大学 Method for preparing isotropic graphite containing coal-based needle coke as aggregate
CN102530933A (en) * 2011-12-30 2012-07-04 清华大学 Artificial graphite product taking emulsified asphalt as binder and preparation method thereof
EP2735542A1 (en) * 2011-07-22 2014-05-28 Unist Academy-Industry Research Corporation Graphene sheet, transparent electrode having same, active layer, and display device, electronic device, optoelectronic device, battery, solar cell, and dye-sensitized solar cell including same
CN104409109A (en) * 2014-09-26 2015-03-11 吕应中 Ultrahigh specific power thermal neutron thorium breeder reactor apparatus and method for nuclear fuel propagation

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101916844B (en) * 2010-07-29 2013-10-30 江西正拓新能源科技有限公司 Torispherical cathode material for lithium ion battery and preparation method thereof
CN102544575B (en) * 2011-12-31 2014-01-22 万向电动汽车有限公司 Lithium-rich manganese-based power battery and manufacturing method thereof

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101079510A (en) * 2007-06-25 2007-11-28 中南大学 A super capacitance cell
CN101318648A (en) * 2008-07-10 2008-12-10 深圳市贝特瑞新能源材料股份有限公司 Process and equipment for producing graphite dust
EP2735542A1 (en) * 2011-07-22 2014-05-28 Unist Academy-Industry Research Corporation Graphene sheet, transparent electrode having same, active layer, and display device, electronic device, optoelectronic device, battery, solar cell, and dye-sensitized solar cell including same
CN102502594A (en) * 2011-10-14 2012-06-20 上海理工大学 Method for preparing isotropic graphite containing coal-based needle coke as aggregate
CN102530933A (en) * 2011-12-30 2012-07-04 清华大学 Artificial graphite product taking emulsified asphalt as binder and preparation method thereof
CN104409109A (en) * 2014-09-26 2015-03-11 吕应中 Ultrahigh specific power thermal neutron thorium breeder reactor apparatus and method for nuclear fuel propagation

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
球床式高温气冷堆示范工程球形燃料元件的研制;周湘文等;《原子能科学技术》;20140731;第48卷(第7期);第1部分

Also Published As

Publication number Publication date
CN106241775A (en) 2016-12-21

Similar Documents

Publication Publication Date Title
US9666863B2 (en) Nano silicon-carbon composite material and preparation method thereof
US4278544A (en) Filter medium for fluid
US4205055A (en) Dual pore-structure artificial carbon and graphite
RU2346910C1 (en) Low density ceramic proppant and method of preparation thereof
JP2505880B2 (en) Method for producing a high density carbon and graphite products
FR2519192A1 (en) Process for preparing a substrate of fuel cell electrodes and product obtained
US20020037247A1 (en) Substantially pure bulk pyrocarbon and methods of preparation
WO1988000601A1 (en) Process for the production of porous shaped articles
US4388255A (en) Method for producing pre-shaped α-silicon nitride whisker compacts and loose whiskers for composite material reinforcement
CN101654239B (en) Isotropic graphite product and preparation method thereof
ES2367674T3 (en) Fuel battery electrode using a composite driving material.
US4190637A (en) Graphite having improved thermal stress resistance and method of preparation
JPH08222241A (en) Manufacture of graphite member for solid high polymer fuel cell
US4579699A (en) Method for making α-Si3 N4 whiskers and articles therefrom
JP3945928B2 (en) Method for producing carbon material for negative electrode of lithium ion secondary battery
US4080413A (en) Porous carbon fuel cell substrates and method of manufacture
CN103618073A (en) Preparation method for silicon-carbon composite cathode material
US4094897A (en) Resin-bonded graphite body for a dry cell
US4013760A (en) Process for the production of isotropic pyrolytic carbon particles
CN103568385B (en) Heat-preservation hard composite carbon fiber felt and preparation method thereof
CN101628816A (en) Method for manufacturing high-density rigid carbon-fiber heat-insulation material
US7504153B2 (en) Porous body, production method thereof and composite material using the porous body
CN100503434C (en) Method of preparing isotropic carbon material and prepared carbon material
US3198714A (en) Process for making carbon articles from carbon particles and furane derivatives
US7816007B2 (en) Spherical carbon particles and their aggregates

Legal Events

Date Code Title Description
C06 Publication
C10 Entry into substantive examination
GR01