CN112299867A - Phenolic resin-silicon powder slurry and preparation method thereof - Google Patents
Phenolic resin-silicon powder slurry and preparation method thereof Download PDFInfo
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- 239000011863 silicon-based powder Substances 0.000 title claims abstract description 98
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 title claims abstract description 53
- 239000002002 slurry Substances 0.000 title claims abstract description 53
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 238000007613 slurry method Methods 0.000 title description 2
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims abstract description 60
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 48
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims abstract description 43
- 239000005011 phenolic resin Substances 0.000 claims abstract description 43
- 229920001568 phenolic resin Polymers 0.000 claims abstract description 43
- SRSXLGNVWSONIS-UHFFFAOYSA-N benzenesulfonic acid Chemical compound OS(=O)(=O)C1=CC=CC=C1 SRSXLGNVWSONIS-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229940092714 benzenesulfonic acid Drugs 0.000 claims abstract description 20
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 24
- 239000004570 mortar (masonry) Substances 0.000 claims description 24
- 239000000203 mixture Substances 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 22
- 238000000227 grinding Methods 0.000 claims description 19
- 239000012445 acidic reagent Substances 0.000 claims description 8
- 239000003153 chemical reaction reagent Substances 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000002131 composite material Substances 0.000 abstract description 38
- 229910052799 carbon Inorganic materials 0.000 abstract description 22
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 21
- 229920000049 Carbon (fiber) Polymers 0.000 abstract description 17
- 239000004917 carbon fiber Substances 0.000 abstract description 16
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 14
- 238000000280 densification Methods 0.000 abstract description 11
- 239000011159 matrix material Substances 0.000 abstract description 9
- 239000002296 pyrolytic carbon Substances 0.000 abstract description 8
- 230000008021 deposition Effects 0.000 abstract description 5
- 229910052710 silicon Inorganic materials 0.000 abstract description 5
- 238000000197 pyrolysis Methods 0.000 abstract description 4
- 239000010703 silicon Substances 0.000 abstract description 3
- 229910010271 silicon carbide Inorganic materials 0.000 description 39
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 19
- 238000010438 heat treatment Methods 0.000 description 13
- 230000002787 reinforcement Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 5
- 238000002441 X-ray diffraction Methods 0.000 description 4
- 238000000151 deposition Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000001764 infiltration Methods 0.000 description 3
- 230000008595 infiltration Effects 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000003763 carbonization Methods 0.000 description 2
- 239000003085 diluting agent Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 239000002243 precursor Substances 0.000 description 2
- 238000002679 ablation Methods 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 238000005475 siliconizing Methods 0.000 description 1
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/71—Ceramic products containing macroscopic reinforcing agents
- C04B35/78—Ceramic products containing macroscopic reinforcing agents containing non-metallic materials
- C04B35/80—Fibres, filaments, whiskers, platelets, or the like
- C04B35/83—Carbon fibres in a carbon matrix
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- 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
- C04B35/565—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 based on silicon carbide
- C04B35/573—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 based on silicon carbide obtained by reaction sintering or recrystallisation
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- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
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- 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
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Abstract
The invention discloses phenolic resin-silicon powder slurry and a preparation method thereof, wherein the phenolic resin-silicon powder slurry comprises the following components in percentage by weight: 22-24 wt% of phenolic resin, 63-66 wt% of silicon powder, 4-6 wt% of methanol and 5-8 wt% of benzenesulfonic acid. The phenolic resin-silicon powder slurry is used for preparing the C/C-SiC composite material, the phenolic resin-silicon powder slurry is placed in a directional hole channel prepared on a carbon fiber preform, carbon in the phenolic resin is mixed with silicon powder in advance, the carbon in the phenolic resin is subjected to densification treatment, the pyrolytic carbon formed by pyrolysis and deposition of C3H8 gas is introduced and mixed with the silicon powder, the carbon from two different sources and components is fully mixed with silicon to react, a Sic matrix with higher compactness can be produced, and therefore the comprehensive mechanical property of the C/C-SiC composite material is greatly improved.
Description
Technical Field
The invention relates to the technical field of composite materials, in particular to phenolic resin-silicon powder slurry and a preparation method thereof.
Background
The composite material is made up by using two or more materials with different properties through a chemical method, so that the comprehensive performance of said composite material is superior to that of original material, and can meet various requirements. The carbon fiber reinforced carbon-based composite material (hereinafter referred to as C/C composite material) is a pure carbon multiphase structure which is composed of carbon fibers or fabrics thereof as a reinforcing phase and chemical vapor infiltration pyrolytic carbon or liquid impregnation-carbonization resin carbon and pitch carbon as matrixes. The C/C Composite material has poor oxidation resistance and high wear rate, and the introduction of SiC in the C/C Composite material can improve the wear rate of the C/C Composite material in a wet state and simultaneously improve the comprehensive mechanical property of the Composite material, so that the C/C-SiC Composite material (C/C-SiC composites, carbon/carbon-silicon carbide Composite material, namely carbon fiber reinforced carbon and silicon carbide double-matrix material) prepared by introducing SiC hard material into the C/C Composite material has a series of excellent properties such as low density, high strength, high temperature resistance, ablation resistance, scouring resistance and the like, and has wide application potential in the aerospace field. With the development of aerospace technology, more and more components need to be prepared from C/C-SiC composite materials.
In the preparation process of the existing C/C-SiC composite material, the introduction method of the SiC matrix comprises a CVI chemical vapor deposition method and a liquid phase siliconizing method, the SiC density is not high when the SiC matrix is introduced by adopting the method, and the performance of the composite material is not greatly improved.
Disclosure of Invention
The invention aims to solve the technical problem of providing phenolic resin-silicon powder slurry and a preparation method thereof, wherein the phenolic resin-silicon powder slurry is used for preparing a C/C-SiC composite material and is beneficial to forming high-density SiC, so that the comprehensive mechanical property of the C/C-SiC composite material is improved.
In order to solve the technical problems, the invention adopts the following technical scheme:
the phenolic resin-silicon powder slurry comprises the following components in percentage by weight: 22-24 wt% of phenolic resin, 63-66 wt% of silicon powder, 4-6 wt% of methanol and 5-8 wt% of benzenesulfonic acid.
Preferably, the phenolic resin-silicon powder slurry comprises the following components in percentage by weight: 24 wt% of phenolic resin, 66 wt% of silicon powder, 5 wt% of methanol and 5 wt% of benzenesulfonic acid.
Preferably, the phenolic resin-silicon powder slurry comprises the following components in percentage by weight: 22 wt% of phenolic resin, 65 wt% of silicon powder, 6 wt% of methanol and 7 wt% of benzenesulfonic acid.
Preferably, the phenolic resin-silicon powder slurry comprises the following components in percentage by weight: 23 wt% of phenolic resin, 63 wt% of silicon powder, 4 wt% of methanol and 8 wt% of benzenesulfonic acid.
A preparation method of phenolic resin-silicon powder slurry comprises the following steps:
pouring 22-24 wt% of phenolic resin and 63-66 wt% of silicon powder into an alumina mortar for grinding for about 5-20 minutes to obtain a mixture of the phenolic resin and the silicon powder which is viscous and difficult to stir;
adding 4-6 wt% of methanol reagent into the alumina mortar to dilute the mixture of the phenolic resin and the silicon powder, and continuously grinding for 3-5 minutes;
adding 5-8 wt% of benzenesulfonic acid reagent into the alumina mortar, and continuously grinding for 3-4 minutes to obtain the corresponding phenolic resin-silicon powder slurry.
The invention has the beneficial technical effects that: the phenolic resin-silicon powder slurry is used for preparing the C/C-SiC composite material, the phenolic resin-silicon powder slurry is placed in a directional hole channel prepared on a carbon fiber preform, carbon in the phenolic resin is mixed with silicon powder in advance, the carbon in the phenolic resin is subjected to densification treatment, the pyrolytic carbon formed by pyrolysis and deposition of C3H8 gas is introduced and mixed with the silicon powder, the carbon from two different sources and components is fully mixed with silicon to react, a Sic matrix with higher compactness can be produced, and therefore the comprehensive mechanical property of the C/C-SiC composite material is greatly improved.
Drawings
FIG. 1 is a process flow diagram of a method of preparing a phenolic resin-silicon powder slurry according to an embodiment of the present invention;
FIG. 2 is a process flow diagram of a method of preparing a phenolic resin-silicon powder slurry according to another embodiment of the present invention;
FIG. 3 is a process flow diagram of a method of preparing a phenolic resin-silicon powder slurry according to yet another embodiment of the present invention;
FIG. 4 is a process flow diagram of a method of making the C/C-SiC composite of the present invention;
FIG. 5 is an XRD pattern of a C/C matrix portion before and after heat treatment,
FIG. 6 is an XRD pattern of portions of the oriented pore channels before and after heat treatment;
FIG. 7 is a graph comparing the performance of different composite samples.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood by those skilled in the art, the present invention is further described with reference to the accompanying drawings and examples.
As shown in fig. 1, in an embodiment of the present invention, the phenolic resin-silicon powder slurry comprises the following components by weight: 24 wt% of phenolic resin, 66 wt% of silicon powder, 5 wt% of methanol and 5 wt% of benzenesulfonic acid. The preparation method of the phenolic resin-silicon powder slurry comprises the following steps of S11-S13:
s11, pouring 24 wt% of phenolic resin and 66 wt% of silicon powder into an alumina mortar for grinding for about 5-20 minutes to obtain a mixture of viscous and difficult-to-stir phenolic resin and silicon powder;
s12, adding a methanol reagent with the concentration of 5 wt% into the alumina mortar to dilute the mixture of the phenolic resin and the silicon powder, and continuing to grind for 3-5 minutes to obtain a muddy water mixture;
s13, adding 5 wt% of benzene sulfonic acid reagent into the alumina mortar, and continuing to grind for 3-4 minutes to obtain the corresponding phenolic resin-silicon powder slurry.
As shown in fig. 2, in another embodiment of the present invention, the phenolic resin-silicon powder slurry comprises 22 wt% of phenolic resin, 65 wt% of silicon powder, 6 wt% of methanol, and 7 wt% of benzenesulfonic acid; the preparation method of the phenolic resin-silicon powder slurry comprises the following steps of S21-S23:
s21, pouring 22 wt% of phenolic resin and 65 wt% of silicon powder into an alumina mortar for grinding for about 5-20 minutes to obtain a mixture of the phenolic resin and the silicon powder which is viscous and difficult to stir;
s22, adding 6 wt% of methanol reagent into the alumina mortar to dilute the mixture of the phenolic resin and the silicon powder, and continuing to grind for 3-5 minutes to obtain a muddy water mixture;
s23, adding a benzenesulfonic acid reagent with the weight percent of 7% into the alumina mortar, and continuously grinding for 3-4 minutes to obtain the corresponding phenolic resin-silicon powder slurry.
As shown in FIG. 3, in another embodiment of the present invention, the phenolic resin-silicon powder slurry comprises 23 wt% of phenolic resin, 63 wt% of silicon powder, 4 wt% of methanol, and 8 wt% of benzenesulfonic acid. The preparation method of the phenolic resin-silicon powder slurry comprises the following steps of S31-S33:
s31, pouring 23 wt% of phenolic resin and 63 wt% of silicon powder into an alumina mortar for grinding for about 5-20 minutes to obtain a viscous and difficult-to-stir mixture of phenolic resin and silicon powder;
s32, adding a methanol reagent with the concentration of 4 wt% into the alumina mortar to dilute the mixture of the phenolic resin and the silicon powder, and continuing to grind for 3-5 minutes to obtain a muddy water mixture;
s33, adding 8 wt% of benzene sulfonic acid reagent into the alumina mortar, and continuing to grind for 3-4 minutes to obtain the corresponding phenolic resin-silicon powder slurry.
FIG. 4 shows a process flow diagram of a preparation method of a C/C-SiC composite material, which comprises steps S10-S40:
and S10, preparing array directional hole channels on the carbon fiber preform.
In this embodiment, the carbon fiber preform may be used with a needle punching density of about 0.34g/cm3The layered 2D carbon fiber mat of (a). The row spacing and the column spacing of the directional hole channels on the carbon fiber preform are equal to each other and are 4mm or 5mm, and the diameter of the directional hole channels is 2 mm. In other embodiments of the present invention, the material selection of the carbon fiber preform, the row spacing, the column spacing, and the diameter of the directional hole channels may be determined according to actual conditions.
And S20, filling the phenolic resin-silicon powder slurry into the directional hole channel, and waiting for natural curing.
The phenolic resin-silicon powder slurry can be prepared by the preparation method of the phenolic resin-silicon powder slurry shown in any one of fig. 1 to 3.
And S30, densifying the carbon fiber preform filled with the phenolic resin-silicon powder slurry.
The invention adopts a thermal gradient chemical vapor infiltration (TG-CVI) method to carry out densification treatment at 900-1200 ℃ and 2-7kPa (relative to atmospheric pressure). C3H8 is used as a precursor gas, N2 is a diluent gas, the gas flow rates of C3H8 and N2 are respectively 120-180ml/min and 300-475ml/min, and the deposition time is 36-72H. In the present example, densification is preferably performed using a thermal gradient chemical vapor infiltration (TG-CVI) process at 1080 ℃ and 5kPa (relative to atmospheric pressure). C3H8 is used as a precursor gas, N2 is used as a diluent gas, the gas flow rates of C3H8 and N2 are 150ml/min and 450ml/min respectively, and the deposition time is 60H.
And S40, placing the densified carbon fiber preform in a high-temperature vacuum furnace for heat treatment, and reacting silicon powder in the phenolic resin-silicon powder slurry with a carbon source to form a SiC reinforcement in the directional hole channel so as to obtain the C/C-SiC composite material.
After densification treatment, the carbon fiber preform subjected to densification treatment is placed in a high-temperature vacuum furnace, heat treatment is carried out for 15-60 minutes at the temperature of 800-2150 ℃, silicon powder in the phenolic resin-silicon powder slurry reacts with a carbon source (part of the carbon source is from pyrolytic carbon deposited by pyrolysis of C3H8 in the densification process, and part of the carbon source is from pyrolytic carbonization of the phenolic resin), and SiC reinforcement is formed in the directional hole channel, so that the C/C-SiC composite material is obtained. In the embodiment of the invention, the carbon fiber preform subjected to densification treatment is placed in a high-temperature vacuum furnace, heat treatment is carried out for 30 minutes at 1400 ℃, silicon powder in the phenolic resin-silicon powder slurry reacts with a carbon source, and therefore SiC reinforcement is formed in the directional hole channel, and the C/C-SiC composite material is obtained.
FIG. 5 shows XRD patterns of a C/C matrix portion before and after heat treatment during preparation of a C/C-SiC composite material, and FIG. 6 shows XRD patterns of a portion of an oriented pore channel before and after heat treatment during preparation of a C/C-SiC composite material. FIG. 5 shows that the as-deposited (before heat treatment) C/C matrix portion shows low intensity broad asymmetric graphite diffraction peaks due to the low crystallinity of the pyrolytic carbon and carbon fibers; after heat treatment at 1400 ℃, the intensity of the diffraction peak is significantly enhanced and becomes narrower and narrower, especially the C (002) diffraction peak. Fig. 6 shows that the phase composition of the portion of the oriented pore channel after densification (before heat treatment) consists essentially of Si and C. The intensity of the Si peak before heat treatment was much higher than the C peak, and no SiC peak was found, indicating that Si did not react with pyrolytic carbon (PyC) during densification. However, after 1400 ℃ heat treatment, a clear SiC peak was observed, but a residual Si peak was still recognized, which indicates that after 1400 ℃ heat treatment, a clear SiC peak was observed, but a residual Si peak was still recognized, indicating that C and Si in the channel were reacted, leaving only a small amount of elemental Si.
FIG. 7 is a graph comparing the performance of different composite samples. Wherein, the sample T is a pure C/C composite material (without SiC reinforcement), the sample T1 is a C/C-SiC composite material (with SiC reinforcement) prepared by the preparation method of the embodiment shown in FIG. 4, the row spacing and the column spacing of the SiC reinforcement are both 4mm, the sample T2 is a C/C-SiC composite material (with SiC reinforcement) prepared by the preparation method of the embodiment shown in FIG. 4, and the row spacing and the column spacing of the SiC reinforcement are both 5 mm. τ represents interlaminar shear strength, and compressive strengths of a load applied in the thickness direction (in-plane) and in the direction perpendicular to the thickness direction (out-of-plane) are P//And P⊥. As can be seen from FIG. 7, the compressive strength (P) of the C/C-SiC composite material with SiC reinforcement is higher than that of the pure C/C composite material//And P⊥) And the interlaminar shear strength is obviously improved, particularly the interlaminar shear strength, the interlaminar shear strength of the T sample is 11.4MPa, the interlaminar shear strength is higher in the C/C composite material, the interlaminar shear strength of the T1 sample and the interlaminar shear strength of the T2 sample are respectively improved by 126 percent and 157 percent compared with that of the T sample, and the effect is obvious.
The phenolic resin-silicon powder slurry is used for preparing the C/C-SiC composite material, the phenolic resin-silicon powder slurry is placed on a carbon fiber preform to prepare a directional hole channel, carbon in the phenolic resin is mixed with silicon powder in advance, the carbon in the phenolic resin is subjected to densification treatment, the pyrolytic carbon formed by pyrolysis deposition is introduced into C3H8 gas and is mixed with the silicon powder, the carbon with two different sources and components is fully mixed with the silicon to react, a Sic matrix with higher compactness can be produced, and therefore the comprehensive mechanical property of the C/C-SiC composite material is greatly improved.
The foregoing is considered as illustrative of the preferred embodiments of the invention and is not to be construed as limiting the invention in any way. Various equivalent changes and modifications can be made by those skilled in the art based on the above embodiments, and all equivalent changes and modifications within the scope of the claims should fall within the protection scope of the present invention.
Claims (8)
1. The phenolic resin-silicon powder slurry is characterized by comprising the following components in percentage by weight: 22-24 wt% of phenolic resin, 63-66 wt% of silicon powder, 4-6 wt% of methanol and 5-8 wt% of benzenesulfonic acid.
2. The phenolic resin-silicon powder slurry of claim 1, comprising the following components in percentage by weight: 24 wt% of phenolic resin, 66 wt% of silicon powder, 5 wt% of methanol and 5 wt% of benzenesulfonic acid.
3. The phenolic resin-silicon powder slurry of claim 1, comprising the following components in percentage by weight: 22 wt% of phenolic resin, 65 wt% of silicon powder, 6 wt% of methanol and 7 wt% of benzenesulfonic acid.
4. The phenolic resin-silicon powder slurry of claim 1, comprising the following components in percentage by weight: 23 wt% of phenolic resin, 63 wt% of silicon powder, 4 wt% of methanol and 8 wt% of benzenesulfonic acid.
5. The preparation method of the phenolic resin-silicon powder slurry is characterized by comprising the following steps of:
pouring 22-24 wt% of phenolic resin and 63-66 wt% of silicon powder into an alumina mortar for grinding for about 5-20 minutes to obtain a mixture of the phenolic resin and the silicon powder which is viscous and difficult to stir;
adding 4-6 wt% of methanol reagent into the alumina mortar to dilute the mixture of the phenolic resin and the silicon powder, and continuously grinding for 3-5 minutes;
adding 5-8 wt% of benzenesulfonic acid reagent into the alumina mortar, and continuously grinding for 3-4 minutes to obtain the corresponding phenolic resin-silicon powder slurry.
6. The method for preparing the phenolic resin-silicon powder slurry according to claim 5, wherein the method for preparing the phenolic resin-silicon powder slurry comprises the following steps:
pouring 24 wt% of phenolic resin and 66 wt% of silicon powder into an alumina mortar for grinding for about 5-20 minutes to obtain a mixture of the phenolic resin and the silicon powder which is viscous and difficult to stir;
adding 5 wt% of methanol reagent into the alumina mortar to dilute the mixture of the phenolic resin and the silicon powder, and continuously grinding for 3-5 minutes to obtain a muddy water mixture;
and adding 5 wt% of benzenesulfonic acid reagent into the alumina mortar, and continuously grinding for 3-4 minutes to obtain the corresponding phenolic resin-silicon powder slurry.
7. The method for preparing the phenolic resin-silicon powder slurry according to claim 5, wherein the method for preparing the phenolic resin-silicon powder slurry comprises the following steps:
pouring 22 wt% of phenolic resin and 65 wt% of silicon powder into an alumina mortar for grinding for about 5-20 minutes to obtain a mixture of the phenolic resin and the silicon powder which is viscous and difficult to stir;
adding 6 wt% of methanol reagent into the alumina mortar to dilute the mixture of the phenolic resin and the silicon powder, and continuously grinding for 3-5 minutes to obtain a muddy water mixture;
adding a benzenesulfonic acid reagent with the weight percent of 7 into the alumina mortar, and continuously grinding for 3-4 minutes to obtain the corresponding phenolic resin-silicon powder slurry.
8. The method for preparing the phenolic resin-silicon powder slurry according to claim 5, wherein the method for preparing the phenolic resin-silicon powder slurry comprises the following steps:
pouring 23 wt% of phenolic resin and 63 wt% of silicon powder into an alumina mortar for grinding for about 5-20 minutes to obtain a mixture of the phenolic resin and the silicon powder which is viscous and difficult to stir;
adding 4 wt% of methanol reagent into the alumina mortar to dilute the mixture of the phenolic resin and the silicon powder, and continuously grinding for 3-5 minutes to obtain a muddy water mixture;
adding 8 wt% of benzenesulfonic acid reagent into the alumina mortar, and continuously grinding for 3-4 minutes to obtain the corresponding phenolic resin-silicon powder slurry.
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