CN105674753B - The preparation method of the sandwich complex silicon carbide load bearing board of graphite - Google Patents

The preparation method of the sandwich complex silicon carbide load bearing board of graphite Download PDF

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Publication number
CN105674753B
CN105674753B CN201610034066.1A CN201610034066A CN105674753B CN 105674753 B CN105674753 B CN 105674753B CN 201610034066 A CN201610034066 A CN 201610034066A CN 105674753 B CN105674753 B CN 105674753B
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graphite
sandwich
silicon carbide
load bearing
bearing board
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CN105674753A (en
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石志民
许步峰
刘克志
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SHANDONG SHENGCHUAN CERAMICS CO Ltd
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SHANDONG SHENGCHUAN CERAMICS CO Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D5/00—Supports, screens, or the like for the charge within the furnace
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
    • C04B35/56—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides
    • 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
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/62222—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products obtaining ceramic coatings
    • 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
    • C04B37/00—Joining burned ceramic articles with other burned ceramic articles or other articles by heating
    • C04B37/001—Joining burned ceramic articles with other burned ceramic articles or other articles by heating directly with other burned ceramic articles
    • 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
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/94—Products characterised by their shape
    • 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
    • C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/30—Composition of layers of ceramic laminates or of ceramic or metallic articles to be joined by heating, e.g. Si substrates
    • C04B2237/32—Ceramic
    • C04B2237/36—Non-oxidic
    • C04B2237/365—Silicon carbide

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Ceramic Products (AREA)
  • Inorganic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Laminated Bodies (AREA)

Abstract

The present invention relates to a kind of preparation methods of the sandwich complex silicon carbide load bearing board of graphite, pug is squeezed out into green body, the green body thin stock equal for the width of width and sandwich graphite cake, again in sandwich two face spray last layer bonding mud of graphite cake, thin stock is entirely bonded on sandwich graphite cake, then, deburring, drying, vacuum-sintering.The sandwich complex silicon carbide load bearing board of graphite prepared by the present invention has bulk density small, and high temperature break resistant intensity is high, it is thermal conductivity height, good thermal shock, wear-resistant, reducing atmosphere is suitable for, while also have low-density characteristic concurrently, it further reduced the density of load bearing board, density≤2.7g/cm3.And sandwich graphite can closely be combined into an entirety with silicon carbide, and service life is long.

Description

The preparation method of the sandwich complex silicon carbide load bearing board of graphite
Technical field
The invention belongs to technical field of inorganic material, are related to a kind of preparation side of the sandwich complex silicon carbide load bearing board of graphite Method.
Background technology
High-temperature flame-proof load bearing board is widely used in ceramic industry as a kind of kiln furnitures.At present, it is common to use load bearing board Material is mainly the following：A beautiful gem green stone-mullite, corundum-mullite, silicon carbide.A beautiful gem green stone-mullite Reducing atmosphere is not suitable for it, corundum-mullite high temperature break resistant intensity is not high, and temperature in use is less than 1450 DEG C.Silicon carbide is held Burning plate has that oxide combinations, silicon nitride bonded silicon, reaction-sintered etc. are several, with thermal conductivity height, good thermal shock, wear-resistant, high The advantages that warm High anti bending strength, and it is suitable for reducing atmosphere.Therefore, silicon carbide load bearing board is most promising, but Its density ratio a beautiful gem green stone-mullite, corundum-mullite are all high, are used as kiln furnitures and absorb that heat is big, high energy consumption.Stone The advantages of sandwich complex silicon carbide load bearing board of ink is exactly to give full play to silicon carbide load bearing board, and overcome its bulk density The shortcomings that high and a kind of novel kiln furnitures product developed.
Invention content
The object of the present invention is to provide a kind of preparation method of the sandwich complex silicon carbide load bearing board of graphite, using party's legal system The load bearing board made, bulk density is small, and high temperature break resistant intensity is high.Not only with the thermal conductivity height of silicon carbide, good thermal shock, wear-resisting It damages, be suitable for the advantages of reducing atmosphere, while also have the low-density characteristic of graphite concurrently, further reduced the density of load bearing board (≤2.7g/cm3).And sandwich graphite can closely be combined into an entirety with silicon carbide, and service life is long.
The preparation method of the sandwich complex silicon carbide load bearing board of graphite of the present invention, squeezes out green body, green body is by pug The equal thin stock of the width of width and sandwich graphite cake, then mud are bonded in sandwich two face spray last layers of graphite cake, by thin stock It is entirely bonded on sandwich graphite cake, then, deburring, drying, vacuum-sintering.
Using extrusion bonding forming method.
The moisture content control of pug is controlled in 11%-13%, the moisture content for being bonded mud in 24%- 26%.
The thickness that pug squeezes out thin stock is 5mm, and the thickness for being bonded mud is 0.15-0.3mm.
The sandwich complex silicon carbide load bearing board of graphite is compound for three layers, and middle layer is graphite material, and two layers of outside is sintering carbon Silicon nitride material.
For the vacuum degree of vacuum-sintering between 80-150Pa, sintering temperature is 1650-1750 DEG C.
The present invention is capable of the principle of the new silicon carbide of siliconising generation using graphite at high temperature, by graphite and silicon carbide green body The reaction-sintered in vacuum drying oven together generates new silicon carbide and sandwich graphite linings and silicon carbide layer is closely combined into one It is whole.
Compared with prior art, the present invention it has the advantages that：
The sandwich complex silicon carbide load bearing board of graphite prepared by the present invention has thermal conductivity height, good thermal shock, wear-resistant, Reducing atmosphere is suitable for, while also has low-density characteristic concurrently, further reduced the density of load bearing board, density≤2.7g/ cm3.And sandwich graphite can closely be combined into an entirety with silicon carbide, and service life is long.
Specific embodiment
With reference to embodiment, the invention will be further described.
Embodiment 1
Pug used and bonding mud are conventional material, and principal component is silicon carbide.
It prepares first and squeezes out pug 100kg, bonding mud 10kg, it is sandwich for 385mm*385mm*8mm to get out size Graphite cake.Then thickness 5mm, the thin stock of width 385mm are squeezed out with extruder, then last layers is sprayed in sandwich two faces of graphite cake Thin stock is entirely sticked on sandwich graphite cake, deburring, drying by the mud of 0.2mm thickness, 1700 DEG C of vacuum reaction sinterings.
12%, the moisture for being bonded mud is controlled 24% for the moisture control of pug.
The bulk density for burning product is 2.63g/cm3, strength at normal temperature 120MPa.
Embodiment 2
Pug used and bonding mud are conventional material, and principal component is silicon carbide.
It prepares first and squeezes out pug 100kg, bonding mud 10kg, it is sandwich for 480mm*400mm*5mm to get out size Graphite cake.Then thickness 5mm, the thin stock of width 400mm are squeezed out with extruder, then last layers is sprayed in sandwich two faces of graphite cake Thin stock is entirely sticked on sandwich graphite cake, deburring, drying by the mud of 0.2mm thickness, 1650 DEG C of vacuum reaction sinterings.
13%, the moisture for being bonded mud is controlled 25% for the moisture control of pug.
The bulk density for burning product is 2.65g/cm3, strength at normal temperature 110MPa.
Embodiment 3
Pug used and bonding mud are conventional material, and principal component is silicon carbide.
It prepares first and squeezes out pug 100kg, bonding mud 10kg, it is sandwich for 300mm*400mm*6mm to get out size Graphite cake.Then thickness 5mm, the thin stock of width 300mm are squeezed out with extruder, then last layers is sprayed in sandwich two faces of graphite cake Thin stock is entirely sticked on sandwich graphite cake, deburring, drying by the mud of 0.2mm thickness, 1750 DEG C of vacuum reaction sinterings.
11%, the moisture for being bonded mud is controlled 26% for the moisture control of pug.
The bulk density for burning product is 2.64g/cm3, strength at normal temperature 125MPa.

Claims (1)

1. a kind of preparation method of the sandwich complex silicon carbide load bearing board of graphite, which is characterized in that pug is squeezed out into green body, green body is The equal thin stock of the width of width and sandwich graphite cake, then mud are bonded in sandwich two face spray last layers of graphite cake, by thin stock It is entirely bonded on sandwich graphite cake, then, deburring, drying, vacuum-sintering；
The sandwich complex silicon carbide load bearing board of graphite is compound for three layers, and middle layer is graphite material, and two layers of outside is sintered silicon carbon Material；
For the vacuum degree of vacuum-sintering between 80-150Pa, sintering temperature is 1650-1750 DEG C;
The moisture content control of pug is controlled in 11%-13%, the moisture content for being bonded mud in 24%-26%;
The thickness that pug squeezes out thin stock is 5mm, and the thickness for being bonded mud is 0.15-0.3mm.
CN201610034066.1A 2016-01-19 2016-01-19 The preparation method of the sandwich complex silicon carbide load bearing board of graphite Active CN105674753B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115448722B (en) * 2022-11-10 2023-05-05 长沙中瓷新材料科技有限公司 Preparation method of large-structure graphite sagger
CN116496103B (en) * 2023-06-25 2023-08-25 成都超纯应用材料有限责任公司 High-strength low-density silicon carbide and preparation method and application thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW200305228A (en) * 2002-03-01 2003-10-16 Hitachi Int Electric Inc Heat treatment apparatus and a method for fabricating substrates
CN2599499Y (en) * 2003-01-27 2004-01-14 宜宾红星敏感电器有限公司 Composite zirconium oxide burning bearing board
CN1838841A (en) * 2005-12-19 2006-09-27 贵阳铝镁设计研究院 Composite high temperature electrical heating element and its making method
CN101121607A (en) * 2006-08-07 2008-02-13 张勇 Composite setter plate and preparation method thereof
CN103935084A (en) * 2014-05-08 2014-07-23 无锡顺佳特种陶瓷有限公司 Zirconia sandwich composite support burning plate and preparation method thereof

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2187291Y (en) * 1994-04-20 1995-01-11 夏吉夫 Concave graphite sintering boat

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW200305228A (en) * 2002-03-01 2003-10-16 Hitachi Int Electric Inc Heat treatment apparatus and a method for fabricating substrates
CN2599499Y (en) * 2003-01-27 2004-01-14 宜宾红星敏感电器有限公司 Composite zirconium oxide burning bearing board
CN1838841A (en) * 2005-12-19 2006-09-27 贵阳铝镁设计研究院 Composite high temperature electrical heating element and its making method
CN101121607A (en) * 2006-08-07 2008-02-13 张勇 Composite setter plate and preparation method thereof
CN103935084A (en) * 2014-05-08 2014-07-23 无锡顺佳特种陶瓷有限公司 Zirconia sandwich composite support burning plate and preparation method thereof

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