JPS5465182A - Production of magnetic fluid - Google Patents

Production of magnetic fluid

Info

Publication number
JPS5465182A
JPS5465182A JP13087077A JP13087077A JPS5465182A JP S5465182 A JPS5465182 A JP S5465182A JP 13087077 A JP13087077 A JP 13087077A JP 13087077 A JP13087077 A JP 13087077A JP S5465182 A JPS5465182 A JP S5465182A
Authority
JP
Japan
Prior art keywords
org
magnetic fluid
salt
colloidal particles
ferrous
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP13087077A
Other languages
Japanese (ja)
Other versions
JPS5526904B2 (en
Inventor
Matsuo Morisawa
Yukio Hirose
Katsunobu Okuya
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TDK Corp
Original Assignee
TDK Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by TDK Corp filed Critical TDK Corp
Priority to JP13087077A priority Critical patent/JPS5465182A/en
Publication of JPS5465182A publication Critical patent/JPS5465182A/en
Publication of JPS5526904B2 publication Critical patent/JPS5526904B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Compounds Of Iron (AREA)
  • Colloid Chemistry (AREA)
  • Lubricants (AREA)
  • Soft Magnetic Materials (AREA)

Abstract

PURPOSE: To efficiently recove a magnetic fluid as an org. phase without requiring heat treatment by forming a monomolecular film of unsatd. fatty acid salts on the surface of colloidal particles produced by adjusting the pH of an aq. soln. contg. ferrous and ferric salts, followed by addn. of a water insol. org. solvent.
CONSTITUTION: The pH of an aq. soln. contg. a ferrous salt such as ferrous sulfate and a ferric salt such as ferric sulfate is adjusted to 7.0W8.5 with alkali such as NaOH to coprecipitate colloidal particles. Next unsatd. fatty acid salts such as Na salt of oleic acid are added in an amt. required to form a monomolecular film on the surfaces of the colloidal particles, followed by stirring at room temp. A water insol. org. solvent such as kerosine is then added to the resulting liquid in a ratio of 100W 200 pts. wt. to 100 pts. wt. of the particles, stirred well, and allowed to stand or subjected to centrifugal separation to separate the liquid into aq. and org. phases. The upper org. phase which is magnetic fluid is recovered.
COPYRIGHT: (C)1979,JPO&Japio
JP13087077A 1977-11-02 1977-11-02 Production of magnetic fluid Granted JPS5465182A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13087077A JPS5465182A (en) 1977-11-02 1977-11-02 Production of magnetic fluid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13087077A JPS5465182A (en) 1977-11-02 1977-11-02 Production of magnetic fluid

Publications (2)

Publication Number Publication Date
JPS5465182A true JPS5465182A (en) 1979-05-25
JPS5526904B2 JPS5526904B2 (en) 1980-07-16

Family

ID=15044615

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13087077A Granted JPS5465182A (en) 1977-11-02 1977-11-02 Production of magnetic fluid

Country Status (1)

Country Link
JP (1) JPS5465182A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5695331A (en) * 1979-07-20 1981-08-01 Anvar Ferroofluid and its manufacture
JPS57144028A (en) * 1981-02-27 1982-09-06 Ricoh Co Ltd Nonaqueous dispersion of fine particle

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4984998A (en) * 1972-07-26 1974-08-15
JPS5113995A (en) * 1974-07-23 1976-02-03 Matsumoto Yushi Seiyaku Kk Jiseiryutaino seizoho
JPS5122688A (en) * 1974-12-18 1976-02-23 Juzo Kahanzaka
JPS5144579A (en) * 1975-03-27 1976-04-16 Juzo Kahanzaka

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4984998A (en) * 1972-07-26 1974-08-15
JPS5113995A (en) * 1974-07-23 1976-02-03 Matsumoto Yushi Seiyaku Kk Jiseiryutaino seizoho
JPS5122688A (en) * 1974-12-18 1976-02-23 Juzo Kahanzaka
JPS5144579A (en) * 1975-03-27 1976-04-16 Juzo Kahanzaka

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5695331A (en) * 1979-07-20 1981-08-01 Anvar Ferroofluid and its manufacture
JPH0335973B2 (en) * 1979-07-20 1991-05-30 Anbaaru Ajansu Nashionaru Do Barorizashion Do Ra Rusherushu
JPS57144028A (en) * 1981-02-27 1982-09-06 Ricoh Co Ltd Nonaqueous dispersion of fine particle

Also Published As

Publication number Publication date
JPS5526904B2 (en) 1980-07-16

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