KR950003168A - Method of manufacturing ferric oxide - Google Patents

Method of manufacturing ferric oxide Download PDF

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Publication number
KR950003168A
KR950003168A KR1019930014283A KR930014283A KR950003168A KR 950003168 A KR950003168 A KR 950003168A KR 1019930014283 A KR1019930014283 A KR 1019930014283A KR 930014283 A KR930014283 A KR 930014283A KR 950003168 A KR950003168 A KR 950003168A
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KR
South Korea
Prior art keywords
ferric
oxide
producing
ferric oxide
aqueous solution
Prior art date
Application number
KR1019930014283A
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Korean (ko)
Inventor
변태봉
이현
김대영
손진군
Original Assignee
조말수
포항종합제철 주식회사
백덕현
재단법인 산업과학기술연구소
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Application filed by 조말수, 포항종합제철 주식회사, 백덕현, 재단법인 산업과학기술연구소 filed Critical 조말수
Priority to KR1019930014283A priority Critical patent/KR950003168A/en
Publication of KR950003168A publication Critical patent/KR950003168A/en

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  • Compounds Of Iron (AREA)
  • Hard Magnetic Materials (AREA)

Abstract

본 발명은 수산화제이철로부터 직접 침상형태의 산화제이철(α-Fe2O3)입자를 제조하는 방법에 관한 것으로서, 출발물질로 사용되는 수산화제이철 침전물제조시 생성반응온도를 적절히 조절함으로써 고밀도 기록용에 적합한 미립의 자성산화철 전구체를 제공하고자 하는데, 그 목적이 있다.The present invention relates to a method for producing a needle-like ferric oxide (α-Fe 2 O 3 ) particles directly from the ferric hydroxide, by adjusting the reaction temperature during the production of ferric hydroxide precipitate used as starting material for high density recording It is an object to provide suitable particulate magnetic iron oxide precursors.

본 발명은 수열반응으로 고밀도 기록용 자성산화물의 전구체인 산화제이철을 제조하는 방법에 있어서, 제이철염 수용액과 알카리 수용액을 상온 -100℃의 온도범위가 되도록 조절한 후 교반을 하면서 두 수용액을 혼합하여 수산화제이철 침전물을 생성시키는 단계 및 상기와 같이 생성된 수산화제이철 침전물에 구연산 수용액을 교반을 하면서 첨가하고, pH가 10.75~11.75가 되도록 조절한 반응물을 수열반응기내에서 100℃ 이상의 온도로 반응시키는 단계를 포함하여 구성되는 산화제이철의 제조방법을 그 요지로 한다.The present invention provides a method for producing ferric oxide which is a precursor of high density recording magnetic oxide by hydrothermal reaction, by adjusting the ferric salt aqueous solution and the aqueous alkali solution to a temperature range of room temperature -100 ℃ and mixing the two aqueous solutions while stirring Producing a ferric hydroxide precipitate and adding the aqueous citric acid solution to the ferric hydroxide precipitate as described above with stirring, and reacting the reactant adjusted to a pH of 10.75 to 11.75 at a temperature of 100 ° C. or higher in a hydrothermal reactor. The manufacturing method of the ferric oxide comprised including that is made into the summary.

Description

산화제이철의 제조방법Method of manufacturing ferric oxide

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

Claims (2)

수열반응으로 고밀도 기록용 자성산화물의 전구체인 산화제이철을 제조하는 방법에 있어서, 제이철염 수용액과 알칼리 수용액을 상온 -100℃의 온도범위가 되도록 조절한 후 교반을 하면서 두 수용액을 혼합하여 수산화제이철 침전물을 생성시키는 단계 및 상기와 같이 생성된 수산화제이철 침전물에 구연산 수용액을 교반을 하면서 첨가하고, pH가 10.75~11.75가 되도록 조절한 반응물을 수열반응기내에서 100℃ 이상의 온도로 반응시키는 단계를 포함하여 구성됨을 특징으로 하는 산화제이철의 제조방법.In the method for producing ferric oxide which is a precursor of high density recording magnetic oxide by hydrothermal reaction, the ferric salt precipitate is prepared by adjusting the ferric salt aqueous solution and the alkali aqueous solution to a temperature range of -100 ° C at room temperature, and then mixing the two aqueous solutions with stirring. It is added to the ferric hydroxide precipitate produced as described above and added while stirring the citric acid aqueous solution, and reacting the reactant adjusted to a pH of 10.75 ~ 11.75 at a temperature of 100 ℃ or more in the hydrothermal reactor Method for producing ferric oxide, characterized in that. 제 1 항에 있어서, 구연산 수용액의 첨가량이 Fe 1g에 대해 0.0006~3.0몰의 구연산농도가 되도록 선정됨을 특징으로 하는 산화제이철의 제조방법.The method for producing ferric oxide according to claim 1, wherein the addition amount of the citric acid aqueous solution is selected so that the concentration of citric acid is 0.0006 to 3.0 mol based on 1 g of Fe. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930014283A 1993-07-27 1993-07-27 Method of manufacturing ferric oxide KR950003168A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019930014283A KR950003168A (en) 1993-07-27 1993-07-27 Method of manufacturing ferric oxide

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Application Number Priority Date Filing Date Title
KR1019930014283A KR950003168A (en) 1993-07-27 1993-07-27 Method of manufacturing ferric oxide

Publications (1)

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KR950003168A true KR950003168A (en) 1995-02-16

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KR1019930014283A KR950003168A (en) 1993-07-27 1993-07-27 Method of manufacturing ferric oxide

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100340404B1 (en) * 1999-06-30 2002-06-12 이형도 A Method for Preparing Oxide Powder by Pressured Hydrothermal Method
KR100552721B1 (en) * 2002-07-19 2006-02-20 현대자동차주식회사 Chain cover of an engine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100340404B1 (en) * 1999-06-30 2002-06-12 이형도 A Method for Preparing Oxide Powder by Pressured Hydrothermal Method
KR100552721B1 (en) * 2002-07-19 2006-02-20 현대자동차주식회사 Chain cover of an engine

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