KR970069947A - Sintering method of ceramics by multilayer stack hot pressing method - Google Patents

Sintering method of ceramics by multilayer stack hot pressing method Download PDF

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KR970069947A
KR970069947A KR1019960011869A KR19960011869A KR970069947A KR 970069947 A KR970069947 A KR 970069947A KR 1019960011869 A KR1019960011869 A KR 1019960011869A KR 19960011869 A KR19960011869 A KR 19960011869A KR 970069947 A KR970069947 A KR 970069947A
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sintering
ceramics
sintered
boron nitride
mold
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KR1019960011869A
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KR0139551B1 (en
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장병국
김환석
이상호
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우덕창
쌍용양회공업 주식회사
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/64—Burning or sintering processes
    • C04B35/645—Pressure sintering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/26—Producing shaped prefabricated articles from the material by slip-casting, i.e. by casting a suspension or dispersion of the material in a liquid-absorbent or porous mould, the liquid being allowed to soak into or pass through the walls of the mould; Moulds therefor ; specially for manufacturing articles starting from a ceramic slip; Moulds therefor
    • B28B1/265—Producing shaped prefabricated articles from the material by slip-casting, i.e. by casting a suspension or dispersion of the material in a liquid-absorbent or porous mould, the liquid being allowed to soak into or pass through the walls of the mould; Moulds therefor ; specially for manufacturing articles starting from a ceramic slip; Moulds therefor pressure being applied on the slip in the filled mould or on the moulded article in the mould, e.g. pneumatically, by compressing slip in a closed mould
    • 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
    • C04B35/575—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 pressure sintering
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
    • C04B35/58—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides
    • C04B35/584—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on silicon nitride
    • C04B35/593—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on silicon nitride obtained by pressure sintering
    • 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
    • C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
    • C04B2235/658—Atmosphere during thermal treatment

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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)
  • Inorganic Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Ceramic Products (AREA)

Abstract

본 발명은 핫프레스 소결로에서, 카본몰드를 이용하여 소결체를 제조할 때 고온 안정성이 우수한 질화붕소(BN) 소재로 된 몰드와 판을 이용하여, 카본 몰드에 질화 붕소 몰드를 넣고 그 안에 세라믹스 원료 분말과 질화붕소판을 다층으로 적재시켜, 한번의 가압소결에 동일한 물성을 지닌 여러개의 세라믹스 소결체를 동시에 제조하는 방법을 제공하기 위한 것이다.In a hot press sintering furnace, a mold and a plate made of a boron nitride (BN) material excellent in high-temperature stability are used to produce a sintered body using a carbon mold, a boron nitride mold is placed in the carbon mold, The present invention is to provide a method for simultaneously manufacturing a plurality of sintered ceramics having the same physical properties in a single pressure sintering by stacking powders and boron nitride plates in multiple layers.

본 발명에 따른 발법은 표면에 변질층이 없는 균일한 소결체를 제조할 수 있을 뿐만 아니라, 원료분말을 다층 적재함으로써 한번의 소결에서도 다층적재수량 만큼 동일한 규격을 가진 여러 개의 소결체를 동시에 제조할 수가 있었다.Not only can a uniform sintered body having no denatured layer on the surface can be produced but also a plurality of sintered bodies having the same size as the multi-layer stacking amount can be produced simultaneously in one sintering by stacking the raw powder in multiple layers .

Description

다층 적재 핫프레싱법에 의한 세라믹스의 소결방법Sintering method of ceramics by multilayer stack hot pressing method

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is a trivial issue, I did not include the contents of the text.

Claims (7)

핫 프레스 소결로에서 세라믹스 원료 분말을 가열과 동시에 가압하는 핫 프레싱 방법에 의해서 세라믹스 소결체를 제조하는 방법에 있어서, 상기 핫 프레스 소결로의 카본 몰드(21)내에 해당 카본 몰드(21)에 내부 직경과 동일한 외부 직경을 갖고 내부는 40㎜ ×40㎜의 사각 형상의 내부 공간을 갖는 질화 붕소로 만들어진 몰드(22)를 넣고 해당 몰드(22)의 내부에 역시 질화 붕소로 만들어진 판(25)과 소결하고자 하는 세라믹스 원료분말(23)을 교대로 복수개를 적층하고 하부 펀지(24)와 상부 펀치(26)를 이용해서 가열과 동시에 가압 소결시켜서 됨을 특징으로 하는 다층 적재 핫프레싱법에 의한 세라믹스의 소결 방법.A method of producing a ceramics sintered body by a hot pressing method for pressing and simultaneously heating a ceramics raw material powder in a hot press sintering furnace, characterized in that the carbon mold (21) of the hot press sintering furnace has an inner diameter A mold 22 made of boron nitride having the same outer diameter and a rectangular internal space of 40 mm x 40 mm is placed and a plate 25 made of boron nitride is placed in the mold 22 to be sintered Wherein a plurality of ceramic raw material powders (23) are alternately stacked and pressed and sintered simultaneously with heating using a lower punch (24) and an upper punch (26). 제1항에 있어서, 상기 소결하고자 하는 세라믹스 원료 분말이 알루미나(Al2O3) 또는 알루미나-티타늄카바이드(Al2O3-TiC)일 경우에는 1500~1700℃의 온도에서 30분 ~1시간 동안 소결하여서 됨을 특징으로 하는 다층 적재 핫프레싱법에 의한 세라믹스의 소결 방법.The method according to claim 1, wherein when the ceramic raw material powder to be sintered is alumina (Al 2 O 3 ) or alumina-titanium carbide (Al 2 O 3 -TiC), it is heated at a temperature of 1500 to 1700 ° C for 30 minutes to 1 hour Sintering the ceramics by a multi-layer stacked hot pressing method. 제1항에 있어서, 상기 소결하고자 하는 세라믹스 원료 분말이 실리콘가비이드(SiC)일 경우에는 1900~2000℃의 온도에서 1시간~3시간 동안 소결하여서 됨을 특징으로하는 다층적재 핫프레싱법에 의한 세라믹스의 소결 방법.The method according to claim 1, wherein when the ceramic raw material powder to be sintered is silicon carbide (SiC), sintering is performed at a temperature of 1900 to 2000 ° C for 1 hour to 3 hours. Lt; / RTI > 제1항에 있어서, 상기 소결하고자 하는 세라믹스 원료 분말이 질화규소(Si3N4)일 경우에는 1700~1800℃의 온도에서 30분~2시간 동안 소결하여서 됨을 특징으로 하는 다층적재 핫프레싱법에 의한 세라믹스의 소결벙법.2. The method according to claim 1, wherein when the ceramic raw material powder to be sintered is silicon nitride (Si 3 N 4 ), it is sintered at a temperature of 1700 to 1800 ° C for 30 minutes to 2 hours. Sintering of ceramics. 제1항 내지 제4항 중 어느 하나의 항에 있어서, 상기 소결시 핫프레싱에 의한 가압 조건은 30MPa-40MPa의 범위에서 실시하는 것을 특징으로 하는 다층적재 핫프레싱법에 의한 세라믹스이 소결방법.The method for sintering ceramics according to any one of claims 1 to 4, wherein the pressing condition by hot pressing during sintering is in the range of 30 MPa to 40 MPa. 제1항에 있어서, 상기 질화붕소 몰드(22)와 질화붕소 판(25)은 질화붕소(BN)의 분말을 금형 몰드에 충진시켜 원하는 형상으로 1차 성형후, 이를 동방정수압 성형에 의하여 2차 성형하여 성형체를 제조하고, 이를 900~2000℃온도 범위에서 질소 분위기하에서 2시간 소결하여 제조된 것임을 특징으로 하는 다층적재 핫프레싱법에 의한 세라믹스의 소결 방법.The method according to claim 1, wherein the boron nitride mold (22) and the boron nitride plate (25) are formed by filling a mold of a boron nitride (BN) powder into a desired shape, And sintering the mixture in a nitrogen atmosphere at 900 to 2000 ° C for 2 hours. The sintering method of the ceramics according to the multi-layer stack hot pressing method. 제6항에 있이서, 상기 질화 붕소 판(25)의 두께는 4~6㎜로 하여서 됨을 특징으로 하는 다층적재 핫프레싱법에 의한 세리믹스의 소결 방법.The sintering method according to claim 6, wherein the thickness of the boron nitride plate (25) is 4 to 6 mm. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: It is disclosed by the contents of the first application.
KR1019960011869A 1996-04-19 1996-04-19 Proce ss for simultaneously producing a number of ceramic sintered body by hot pressing method KR0139551B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103896601A (en) * 2014-03-06 2014-07-02 清华大学 Hot pressed sintering method of ceramic products with high density and complex shapes

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100791086B1 (en) * 2006-12-20 2008-01-03 (주) 제하 Apparatus and method for manufacturing plate using hot press
KR101499983B1 (en) * 2008-12-18 2015-03-09 엘지이노텍 주식회사 Mold apparatus and method of fabricating sintering body
JP5926256B2 (en) * 2010-07-30 2016-05-25 エルジー イノテック カンパニー リミテッド Hot pressure sintering apparatus and pressure member used therefor
KR101125314B1 (en) * 2010-07-30 2012-03-27 엘지이노텍 주식회사 Hot press sintering apparatus
KR101360144B1 (en) * 2012-05-22 2014-02-07 대우조선해양 주식회사 Installation method for soft-core wall panel of accommodation in ship

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103896601A (en) * 2014-03-06 2014-07-02 清华大学 Hot pressed sintering method of ceramic products with high density and complex shapes

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