CN116082042A - Preparation method of boron carbide porous framework - Google Patents
Preparation method of boron carbide porous framework Download PDFInfo
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- CN116082042A CN116082042A CN202310036193.5A CN202310036193A CN116082042A CN 116082042 A CN116082042 A CN 116082042A CN 202310036193 A CN202310036193 A CN 202310036193A CN 116082042 A CN116082042 A CN 116082042A
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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
- C04B35/563—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 boron carbide
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/80—Mixing plants; Combinations of mixers
- B01F33/83—Mixing plants specially adapted for mixing in combination with disintegrating operations
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- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
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- 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
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
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- 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
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
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Abstract
The invention discloses a preparation method of a boron carbide porous framework, which comprises the following steps that S1, alumina particle powder or aluminum powder is added into boron carbide powder, a high molecular binder is added, feeding is manufactured with higher loading capacity, and the materials are uniformly mixed in mixing equipment to prepare mixed powder; s2, the mixed powder is placed in a mould, and is directly pressed and formed in the mould by a hydraulic press to prepare boron carbide briquettes; s3, placing the boron carbide briquettes into a vacuum furnace, heating to 500-600 ℃ to remove the high molecular binder, and heating to 1900-1950 ℃ under the pressure of 20-30MPa to form the sintered porous skeleton. According to the invention, the material pushing plate is driven to rotate by the material mixing main shaft through the turntable, the material pushing plate drives the additive to rotate on the surface of the fixed filter screen frame, and the additive can be filtered through the fixed filter screen frame, so that the impurities carried by the additive can be effectively reduced.
Description
Technical Field
The invention relates to the technical field of preparation of boron carbide multi-frameworks, in particular to a preparation method of a boron carbide porous framework.
Background
Boron carbide is one of the three most rigid materials known and can be used in tank armor, ballistic garments and many industrial applications.
According to the search, in the manufacturing method of the non-shrinkage tungsten framework with the publication number of CN114160787A, a small amount of oxide powder is added into tungsten powder, then the tungsten powder is reduced in a hydrogen atmosphere to form sintering necks among tungsten particles, and then the tungsten framework is formed through sintering, so that the manufacturing method of the non-shrinkage tungsten framework can be used for solving the problem of unstable product quality.
In the preparation process of a common boron carbide multi-framework, the boron carbide raw material is easy to carry impurities, and the problem of reduced quality of the boron carbide multi-framework preparation is easy to be caused due to overlarge particle size or shape difference of the boron carbide raw material, so that the boron carbide multi-framework preparation method with higher practicability is provided.
Disclosure of Invention
The invention aims to provide a preparation method of a boron carbide porous framework, which solves the existing problems.
In order to achieve the above purpose, the present invention provides the following technical solutions: the preparation method of the boron carbide porous framework comprises the following steps of;
s1, adding alumina particle powder or aluminum powder into boron carbide powder, adding a high molecular binder, preparing a feed with higher loading capacity, and uniformly mixing in mixing equipment to prepare mixed powder;
s2, the mixed powder is placed in a mould, and is directly pressed and formed in the mould by a hydraulic press to prepare boron carbide briquettes;
s3, placing the boron carbide briquettes into a vacuum furnace, heating to 500-600 ℃ to remove the high molecular binder, and heating to 1900-1950 ℃ under the pressure of 20-30MPa to form the sintered porous skeleton.
Mixing equipment, including the compounding support frame, the inside of compounding support frame is provided with the compounding jar body to and be located the both sides at compounding jar body top and all be provided with feed mechanism, the top of the compounding jar body is provided with the compounding motor, the input of compounding motor is connected with the compounding main shaft, the one end that the compounding main shaft extends into the inside of compounding jar body is connected with two stirring arms, the discharge gate has been seted up to the bottom of the compounding jar body.
Preferably, the feeding mechanism comprises a feeding bin, a feeding port is formed in one side of the top of the feeding bin, a filling port is formed in one side of the bottom of the feeding bin, a fixed shaft rod is arranged in the feeding bin, a plurality of crushing blades are connected to the top of the fixed shaft rod, and the crushing blades are distributed in a triangular cone shape.
Preferably, the middle part of fixed axostylus axostyle is connected with the swivel mount, the inside of swivel mount is provided with the fixed blade of a plurality of crisscross setting, swivel mount and fixed blade fixed connection.
Preferably, the bottom of the fixed shaft lever is connected with a feeding auger blade.
Preferably, one end of the fixed shaft rod penetrating through the feeding bin is connected with a fixed bevel gear, the fixed bevel gear is meshed with an inner bevel gear disc, and the inner bevel gear disc is fixedly connected with the mixing main shaft.
Preferably, the discharge gate is cavity round platform column structure, the inside of discharge gate is provided with connecting frame, connecting frame's both sides all are connected with fixed push pedal, connecting frame and compounding main shaft fixed connection.
Preferably, the inside of the compounding jar body is provided with fixed filter screen frame, the top of fixed filter screen frame is provided with the carousel, the both sides of carousel all are connected with the pushing plate, compounding main shaft and carousel fixed connection.
The preparation method of the boron carbide porous framework specifically comprises the following steps of;
s1, adding alumina particle powder or aluminum powder into boron carbide powder, adding a high molecular binder, preparing a feed with higher loading capacity, and uniformly mixing in mixing equipment to prepare mixed powder;
s11, adding boron carbide powder, alumina particle powder and a high polymer binder into the feed bin through a feed port;
s12, under the action of a mixing motor, the inner bevel gear disk is driven to rotate through the mixing spindle, the inner bevel gear disk is meshed with the fixed bevel gear, the inner bevel gear disk drives the fixed bevel gear to rotate, the fixed bevel gear is fixedly connected with the fixed shaft lever, the fixed shaft lever and the fixed bevel gear can be synchronously rotated, the fixed shaft lever can drive the crushing blade to rotate, and the additive can be crushed;
s13, enabling the crushed additive to flow into the middle of the feeding bin, fixing the shaft rod and synchronously driving the rotating frame, and enabling the fixed blades to rotate, wherein the fixed blades can crush the additive again;
s14, fixing the shaft rod and driving the feeding auger blade to rotate, wherein the feeding auger blade guides the additive for pushing secondary crushing into the mixing tank body through the adding port;
s15, the material mixing main shaft drives the material pushing plate to rotate through the turntable, the material pushing plate drives the additive to rotate on the surface of the fixed filter screen frame, and the additive can be filtered through the fixed filter screen frame;
s16, the mixing main shaft synchronously drives the stirring arms to mix the filtered additives until the additives are uniformly mixed;
s17, the mixing main shaft drives the connecting frame and the fixed push plate to synchronously rotate, so that the mixed powder can be pushed to rotate at the discharge hole and can be discharged through the inside of the discharge hole;
s2, the mixed powder is placed in a mould, and is directly pressed and formed in the mould by a hydraulic press to prepare boron carbide briquettes;
s3, placing the boron carbide briquettes into a vacuum furnace, heating to 500-600 ℃ to remove the high molecular binder, and heating to 1900-1950 ℃ under the pressure of 20-30MPa to form the sintered porous skeleton.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, under the action of a mixing motor, the inner bevel gear disk is driven to rotate through the mixing spindle, the inner bevel gear disk is meshed with the fixed bevel gear, the inner bevel gear disk drives the fixed bevel gear to rotate, the fixed bevel gear is fixedly connected with the fixed shaft lever, the fixed shaft lever and the fixed bevel gear can be synchronously rotated, the fixed shaft lever can drive the crushing blade to rotate, additives can be crushed, the crushed additives flow into the middle part of the feeding bin, the fixed shaft lever can synchronously drive the rotating frame, and the fixed blades can be used for crushing the additives again, the fixed shaft lever can drive the feeding auger blades to rotate, and the feeding auger blades can drive the secondarily crushed additives to be led into the mixing tank through the adding port.
According to the invention, the material pushing plate is driven to rotate by the material mixing main shaft through the turntable, the material pushing plate drives the additive to rotate on the surface of the fixed filter screen frame, and the additive can be filtered through the fixed filter screen frame, so that the impurities carried by the additive can be effectively reduced.
According to the invention, the mixing main shaft drives the connecting frame and the fixed push plate to synchronously rotate, so that the mixed powder can be pushed to rotate at the discharge hole, and the mixed powder can be discharged from the inside of the discharge hole.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of a partial enlarged structure of the portion A in FIG. 1 according to the present invention;
fig. 3 is a schematic view of a partial enlarged structure at B in fig. 1 according to the present invention.
In the figure: 1. a material mixing support frame; 2. a feed mechanism; 201. a feeding bin; 202. a feed inlet; 203. fixing the shaft lever; 204. crushing blades; 205. a rotating frame; 206. a fixed blade; 207. feeding auger blades; 208. fixing a bevel gear; 209. an inner bevel gear disc; 3. a mixing motor; 4. a mixing tank body; 5. a mixing main shaft; 6. a stirring arm; 7. a discharge port; 8. a turntable; 9. a pushing plate; 10. fixing a filter screen frame; 11. a connection frame; 12. fixing the push plate.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
The preparation method of the boron carbide porous framework comprises the following steps of;
s1, adding alumina particle powder or aluminum powder into boron carbide powder, adding a high molecular binder, preparing a feed with higher loading capacity, and uniformly mixing in mixing equipment to prepare mixed powder;
s2, the mixed powder is placed in a mould, and is directly pressed and formed in the mould by a hydraulic press to prepare boron carbide briquettes;
s3, placing the boron carbide briquettes into a vacuum furnace, heating to 500-600 ℃ to remove the high molecular binder, and heating to 1900-1950 ℃ under the pressure of 20-30MPa to form the sintered porous skeleton.
As shown in fig. 1, fig. 2 and fig. 3, compounding equipment, including compounding support frame 1, compounding support frame 1's inside is provided with mixing tank body 4, and be located mixing tank body 4 top's both sides all are provided with feed mechanism 2, mixing tank body 4's top is provided with compounding motor 3, compounding motor 3's input is connected with compounding main shaft 5, compounding main shaft 5 extends into mixing tank body 4 inside one end is connected with two stirring arms 6, discharging port 7 has been seted up to mixing tank body 4's bottom, mixing tank body 4's inside is provided with fixed filter screen frame 10, fixed filter screen frame 10's top is provided with carousel 8, carousel 8's both sides all are connected with push plate 9, compounding main shaft 5 and carousel 8 fixed connection, compounding main shaft 5 will drive push plate 9 through carousel 8 and rotate, push plate 9 will promote the surface rotation of additive at fixed filter screen frame 10, can be to additive filter treatment through fixed filter screen frame 10, the impurity that can effectually reduce the additive and carry, discharging port 7 is hollow round platform column structure, discharging port 7's inside is provided with connecting frame 11, connecting frame 11's both sides are connected with push plate 11, can drive the powder push plate 11 and mix main shaft 5 and mix the powder of the inside is connected with the fixed connection of mixing frame 11, can be rotated at the synchronous discharging port of mixing frame 11, the powder is rotated through the fixed connection of the mixing frame 11, the powder is discharged through the fixed connection of the powder is discharged through the fixed connection frame 11.
As shown in fig. 1, fig. 2 and fig. 3, the mixing device further comprises a feeding mechanism 2, the feeding mechanism 2 comprises a feeding bin 201, a feeding port 202 is formed in one side of the top of the feeding bin 201, a filling port is formed in one side of the bottom of the feeding bin 201, a fixed shaft 203 is arranged in the feeding bin 201, one end of the fixed shaft 203, which passes through the feeding bin 201, is connected with the fixed bevel gear 208, the fixed bevel gear 208 is meshed with an inner bevel gear 209, the inner bevel gear 209 is fixedly connected with the mixing spindle 5, the top of the fixed shaft 203 is connected with a plurality of crushing blades 204, the crushing blades 204 are distributed in a triangular cone shape, the inner bevel gear 209 is driven by the mixing spindle 5 to rotate through the mixing spindle 3, the inner bevel gear 209 is meshed with the fixed bevel gear 208, the inner bevel gear 209 pushes the fixed bevel gear 208 to rotate, the fixed bevel gear 208 is fixedly connected with the fixed bevel gear 203, the fixed shaft 203 can synchronously rotate with the fixed bevel gear 208, the fixed shaft 203 can drive the crushing blades 204 to crush the additives, the middle of the fixed shaft 203 is connected with a rotating frame 205, a plurality of staggered blades 206 are arranged in the rotating frame 205, the inner bevel gear 205 is fixedly connected with the fixed blade 206, the fixed blade 206 can be added to the fixed blade 203, and the fixed blade 206 can be synchronously added to the rotating the fixed blade 203, and the fixed blade is connected with the fixed blade 203, and the fixed blade is added to the fixed blade, and the fixed blade is connected with the fixed blade 203, and the fixed blade is further, the fixed blade is connected with the fixed blade, and the fixed blade is by the fixed blade.
As shown in fig. 1, 2 and 3, a preparation method of a boron carbide porous skeleton specifically comprises the following steps of;
s1, adding alumina particle powder or aluminum powder into boron carbide powder, adding a high molecular binder, preparing a feed with higher loading capacity, and uniformly mixing in mixing equipment to prepare mixed powder;
s11, adding boron carbide powder, alumina particle powder and a high polymer binder into the feeding bin 201 through a feeding port 202;
s12, under the action of the mixing motor 3, the inner inclined tooth disc 209 is driven to rotate through the mixing spindle 5, the inner inclined tooth disc 209 is meshed with the fixed bevel gear 208, the inner inclined tooth disc 209 pushes the fixed bevel gear 208 to rotate, the fixed bevel gear 208 is fixedly connected with the fixed shaft lever 203, the fixed shaft lever 203 and the fixed bevel gear 208 can synchronously rotate, the fixed shaft lever 203 can drive the crushing blade 204 to rotate, and additives can be crushed;
s13, enabling the crushed additive to flow into the middle of the feeding bin 201, enabling the fixed shaft rod 203 to synchronously drive the rotating frame 205 and the fixed blades 206 to rotate, and enabling the fixed blades 206 to crush the additive again;
s14, fixing the shaft lever 203 and driving the feeding auger blade 207 to rotate, wherein the feeding auger blade 207 guides the additive for pushing secondary crushing into the mixing tank body 4 through the adding port;
s15, the material mixing main shaft 5 drives the material pushing plate 9 to rotate through the rotary disc 8, the material pushing plate 9 drives the additive to rotate on the surface of the fixed filter screen frame 10, and the additive can be filtered through the fixed filter screen frame 10;
s16, the mixing main shaft 5 synchronously drives the stirring arms 6 to mix the filtered additives until the additives are uniformly mixed;
s17, the mixing main shaft 5 drives the connecting frame 11 and the fixed push plate 12 to synchronously rotate, so that the mixed powder can be pushed to rotate at the discharge hole 7, and the mixed powder can be discharged from the inside of the discharge hole 7;
s2, the mixed powder is placed in a mould, and is directly pressed and formed in the mould by a hydraulic press to prepare boron carbide briquettes;
s3, placing the boron carbide briquettes into a vacuum furnace, heating to 500-600 ℃ to remove the high molecular binder, and heating to 1900-1950 ℃ under the pressure of 20-30MPa to form the sintered porous skeleton.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The preparation method of the boron carbide porous framework is characterized by comprising the following steps of;
s1, adding alumina particle powder or aluminum powder into boron carbide powder, adding a high molecular binder, preparing a feed with higher loading capacity, and uniformly mixing in mixing equipment to prepare mixed powder;
s2, the mixed powder is placed in a mould, and is directly pressed and formed in the mould by a hydraulic press to prepare boron carbide briquettes;
s3, placing the boron carbide briquettes into a vacuum furnace, heating to 500-600 ℃ to remove the high molecular binder, and heating to 1900-1950 ℃ under the pressure of 20-30MPa to form the sintered porous skeleton.
2. The mixing device according to claim 1, comprising a mixing support frame (1), wherein the mixing support frame (1) is internally provided with a mixing tank body (4), feeding mechanisms (2) are arranged on two sides of the top of the mixing tank body (4), a mixing motor (3) is arranged on the top of the mixing tank body (4), a mixing main shaft (5) is connected with the input end of the mixing motor (3), one end of the mixing main shaft (5) extending into the mixing tank body (4) is connected with two stirring arms (6), and a discharge hole (7) is formed in the bottom of the mixing tank body (4).
3. The mixing device according to claim 2, wherein the feeding mechanism (2) comprises a feeding bin (201), a feeding port (202) is formed in one side of the top of the feeding bin (201), a filling port is formed in one side of the bottom of the feeding bin (201), a fixed shaft lever (203) is arranged in the feeding bin (201), a plurality of crushing blades (204) are connected to the top of the fixed shaft lever (203), and the crushing blades (204) are distributed in a triangular cone shape.
4. A mixing device according to claim 3, characterized in that the middle part of the fixed shaft lever (203) is connected with a rotating frame (205), a plurality of fixed blades (206) which are arranged in a staggered manner are arranged in the rotating frame (205), and the rotating frame (205) is fixedly connected with the fixed blades (206).
5. A mixing device according to claim 3, characterized in that the bottom of the stationary shaft (203) is connected with a feeding auger blade (207).
6. A mixing device according to claim 3, characterized in that one end of the fixed shaft (203) passing through the feeding bin (201) is connected with a fixed bevel gear (208), the fixed bevel gear (208) is meshed with an inner bevel gear (209), and the inner bevel gear (209) is fixedly connected with the mixing spindle (5).
7. The mixing device according to claim 2, wherein the discharge port (7) is of a hollow round table-shaped structure, a connecting frame (11) is arranged in the discharge port (7), two sides of the connecting frame (11) are connected with fixed push plates (12), and the connecting frame (11) is fixedly connected with the mixing main shaft (5).
8. The mixing device according to claim 2, characterized in that a fixed filter screen frame (10) is arranged in the mixing tank body (4), a rotary table (8) is arranged above the fixed filter screen frame (10), two sides of the rotary table (8) are connected with a pushing plate (9), and the mixing main shaft (5) is fixedly connected with the rotary table (8).
9. The preparation method of the boron carbide porous framework is characterized by comprising the following steps of;
s1, adding alumina particle powder or aluminum powder into boron carbide powder, adding a high molecular binder, preparing a feed with higher loading capacity, and uniformly mixing in mixing equipment to prepare mixed powder;
s11, adding boron carbide powder, alumina particle powder and a high polymer binder into the feeding bin (201) through a feeding hole (202);
s12, under the action of a mixing motor (3), the inner helical gear disc (209) is driven to rotate through the mixing spindle (5), the inner helical gear disc (209) is meshed with the fixed helical gear (208), the inner helical gear disc (209) pushes the fixed helical gear (208) to rotate, the fixed helical gear (208) is fixedly connected with the fixed shaft lever (203), the fixed shaft lever (203) and the fixed helical gear (208) can be synchronously rotated, the fixed shaft lever (203) can drive the crushing blade (204) to rotate, and additives can be crushed;
s13, enabling the crushed additive to flow into the middle of the feeding bin (201), fixing the shaft rod (203) and synchronously driving the rotating frame (205), and enabling the fixed blades (206) to rotate, wherein the fixed blades (206) can crush the additive again;
s14, fixing the shaft lever (203) and driving the feeding auger blade (207) to rotate, wherein the feeding auger blade (207) guides the additive for pushing secondary crushing into the mixing tank body (4) through the adding port;
s15, the material mixing main shaft (5) drives the material pushing plate (9) to rotate through the rotary table (8), the material pushing plate (9) drives the additive to rotate on the surface of the fixed filter screen frame (10), and the additive can be filtered through the fixed filter screen frame (10);
s16, the mixing main shaft (5) synchronously drives the stirring arm (6) to mix the filtered additives until the additives are uniformly mixed;
s17, the mixing main shaft (5) drives the connecting frame (11) and the fixed push plate (12) to synchronously rotate, so that the mixed powder can be pushed to rotate at the discharge hole (7) and can be discharged through the inside of the discharge hole (7);
s2, the mixed powder is placed in a mould, and is directly pressed and formed in the mould by a hydraulic press to prepare boron carbide briquettes;
s3, placing the boron carbide briquettes into a vacuum furnace, heating to 500-600 ℃ to remove the high molecular binder, and heating to 1900-1950 ℃ under the pressure of 20-30MPa to form the sintered porous skeleton.
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| CN101215164A (en) * | 2008-01-16 | 2008-07-09 | 东北大学 | Method for preparing boron carbide composite material |
| CN109279909A (en) * | 2018-10-29 | 2019-01-29 | 宁波伏尔肯科技股份有限公司 | A kind of preparation method of high strength carbonizing boron porous ceramics |
| CN210124307U (en) * | 2019-03-26 | 2020-03-06 | 南京郁氏生物科技有限公司 | A compounding agitating unit for feed processing |
| CN213286653U (en) * | 2020-08-27 | 2021-05-28 | 福泉凯威特新材料有限公司 | Novel energy-saving building material continuous production device |
| CN115403386A (en) * | 2022-08-24 | 2022-11-29 | 佛山国防科技工业技术成果产业化应用推广中心 | Whisker-reinforced boron carbide composite ceramic and preparation method thereof |
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