KR950013984A - Manufacturing method of mullite needle crystal - Google Patents

Manufacturing method of mullite needle crystal Download PDF

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Publication number
KR950013984A
KR950013984A KR1019930025300A KR930025300A KR950013984A KR 950013984 A KR950013984 A KR 950013984A KR 1019930025300 A KR1019930025300 A KR 1019930025300A KR 930025300 A KR930025300 A KR 930025300A KR 950013984 A KR950013984 A KR 950013984A
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South Korea
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source
alumina
silica
fluorine
mullite
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KR1019930025300A
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Korean (ko)
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KR0132765B1 (en
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최지영
김주영
권태현
김준
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최근선
주식회사 엘지화학
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    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B33/00—Silicon; Compounds thereof
    • C01B33/20—Silicates
    • C01B33/26—Aluminium-containing silicates, i.e. silico-aluminates
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/10—Particle morphology extending in one dimension, e.g. needle-like

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Silicates, Zeolites, And Molecular Sieves (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)

Abstract

본 발명은 알루미나-시릴카 원으로 충진밀도 0.5g/cm3이하인 미립의 혼합분말을 사용하고 불소원으로 불화알루미늄 및 암모늄헥사플루오로 실리케이트를 사용하여 응집이 없는 뮬라이트 침상결정을 제조하는 방법에 관한 것이다. 본 발명에 의하여 불소원의 사용을 최소화 할 수 있으며, 반응후 발생되는 불소함유 유독가스를 포집처리하는 공정이 가능하며, 불소원으로써 암모늄헥사플루오로 실리케이트를 사용함으로써 제조 단가를 줄일 수 있다는 이점이 있다. 또한 본 발명에 의해 제조되는 뮬라이트 침상결정은 응집이 없어 구조재료용 복합테의 보강재료로 유용하게 사용될 수 있다.The present invention relates to a method for producing agglomerate-free mullite needle crystals using fine powders having a packing density of 0.5 g / cm 3 or less as an alumina-cyrilka source and using aluminum fluoride and ammonium hexafluoro silicate as fluorine sources. will be. According to the present invention, it is possible to minimize the use of the fluorine source, to process the fluorine-containing toxic gas generated after the reaction, and to reduce the manufacturing cost by using ammonium hexafluoro silicate as the fluorine source. have. In addition, the mullite needle crystal prepared by the present invention is not agglomerated and can be usefully used as a reinforcing material of a composite frame for structural materials.

Description

뮬라이트 침상결정의 제조방법Manufacturing method of mullite needle crystal

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 ㄹ불화알루미늄을 첨가하여 제조한 뮬라이트 침상결정의 전자현미경 사진이다.1 is an electron micrograph of a mullite needle crystal prepared by adding aluminum fluoride.

제2도는 암모늄헥사플루오로실리케이트를 첨가하여 제조한 뮬라이트 침상결정의 전자현미경 사진이다.2 is an electron micrograph of a mullite needle crystal prepared by adding ammonium hexafluorosilicate.

제3도는 암모늄헥사플루오로실리케이트를 첨가하는 경우 발생하는 불소함유 유독가스를 포집하도록 고안한 뮬라이트 침상결정 제조장치의 모식도이다.3 is a schematic diagram of an apparatus for preparing mullite needle crystals designed to trap fluorine-containing toxic gases generated when ammonium hexafluorosilicate is added.

Claims (13)

알루미나-실리카원으로 충진밀도가 0.5g/cm3이하인 혼합분말에 불소원으로 불화알루미늄을 뮬라이트에 대해 1 내지 30중량% 첨가하여 900내지 1500℃에서 0.5내지 10시간 열처리시킴을 특징으로 하는 뮬라이트 침상결정을 제조하는 방법.Mullite bed characterized in that 1 to 30% by weight of aluminum fluoride is added to the mullite as a fluorine source in a mixed powder having a packing density of 0.5 g / cm 3 or less with heat treatment at 900 to 1500 ° C. for 0.5 to 10 hours. How to make a crystal. 제1항에 있어서, 알루미나원으로, 알루미늄염, 알루미늄 알콕사이드, 보헤마아트, 보헤마이트졸, 알루미나졸, γ-알루미나를 사용하는 방법.The method according to claim 1, wherein an aluminum salt, aluminum alkoxide, boehma art, boehmite sol, alumina sol, γ-alumina are used as the alumina source. 제2항에 있어서, 알루미늄염이 Al(NO3)39H30 및 AlCl3인 방법.The method of claim 2, wherein the aluminum salt is Al (NO 3 ) 3 9H 3 0 and AlCl 3 . 제2항에 있어서, 알루미늄 알콕사이드가 Al(OC3H7)3인 방법.The method of claim 2, wherein the aluminum alkoxide is Al (OC 3 H 7 ) 3 . 제1항에 있어서, 실리카원으로 실리콘 알콕사이드, 실리카겔, 실리카졸,0 퓨움드 실리카를 사용하는 방법.The method according to claim 1, wherein silicon alkoxide, silica gel, silica sol, and zero-fused silica are used as the silica source. 제5항에 있어서, 실리콘 알콕사이드가 Si(OC2H5)4인 방법.The method of claim 5, wherein the silicon alkoxide is Si (OC 2 H 5 ) 4 . 제1항에 있어서, 알루미나원과 실리카원을 동시에 포함하는 물질로 카올리나타이트를 사용하는 방법.The method of claim 1, wherein kaolinite is used as a material containing both an alumina source and a silica source. 제1항에 있어서, 알루미나-실리카원으로 보헤마이트졸과 실리카종를 혼합-켈화-건조한 흔합분말을 사용하는 방법.The method according to claim 1, wherein a mixed-kelized-dry mixed powder of boehmite sol and silica species is used as the alumina-silica source. 알루미나-실리카원으로 충진밀도가 0.5g/cm 이하인 혼합분람에 불소원으로 암모늄헥사플루오로 실리케이트를 사용함을 특징으로 하는 뮬라이트 침상결정을 제조하는 방법.A method for producing a mullite needle crystal, characterized in that ammonium hexafluoro silicate is used as a fluorine source in a mixed dispersion having a packing density of 0.5 g / cm or less with an alumina-silica source. 제6항에 있어서, 암모늄헥사플루오로실리케이트를 뮬라이트에 대해 3 내지 50 중량% 첨가함을 특징으로 하는 방법.7. A process according to claim 6, wherein ammonium hexafluorosilicate is added in an amount of 3 to 50% by weight relative to mullite. 제6항에 있어서, 열처리 온도가 900 내지 1500이고 열처리 시간이 0.5 내지 10시간인 방법.The method of claim 6, wherein the heat treatment temperature is 900 to 1500 and the heat treatment time is 0.5 to 10 hours. 불소원으로 암모늄헥사플루오로실리케이트를 열분해하고 이를 튜브전기로(1, 2)가 관을 통해 연결되어 있고 각각에 암모늄헥사플루오로실리케이트 분말(3)과 알루미나-실리카원의 혼합분말(4)이 내재하고 불소함유 유독가스를 염기성 수용액에 용해시켜 포집하는 장치(5)로 구성된 반응용기내로 공기와 함께 주입하여 알루미나-실리카원의 혼합분말과 반응시키고 발생되는 불소함유 유독가스를 포집하는 공정을 통해 제조함을 특징으로 하는 뮬라이트 침상결정의 제조방법.The pyrolysis of ammonium hexafluorosilicate as a fluorine source was carried out through tube electric furnaces (1 and 2), and the mixed powder (4) of ammonium hexafluorosilicate powder (3) and alumina-silica source was connected to each other. Through the process of injecting together with air into the reaction vessel composed of a device (5) inherent and dissolving the fluorine-containing toxic gas in a basic aqueous solution and collecting the fluorine-containing toxic gas generated by the reaction. Method for producing a mullite needle crystal characterized in that the manufacturing. 제1항 내지 제9항중 어느 한 항에 의해 제조된 뮬라이트 침상결정의 구조재룡용 복합체의 보강재로서의 용도.Use of the mullite needle crystals prepared according to any one of claims 1 to 9 as a reinforcing material of a composite for structural fungus. ※ 참고사항：최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930025300A 1993-11-25 1993-11-25 Method of processing mullite whisker KR0132765B1 (en)

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KR100382991B1 (en) * 1996-01-26 2003-07-10 주식회사 엘지화학 Method for preparing porous mullite powder
KR970059132A (en) * 1996-01-26 1997-08-12 성재갑 Manufacturing method of mullite whisker

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