JPS645997A - Production of high magnetic permeability ferrite material - Google Patents

Production of high magnetic permeability ferrite material

Info

Publication number
JPS645997A
JPS645997A JP16052887A JP16052887A JPS645997A JP S645997 A JPS645997 A JP S645997A JP 16052887 A JP16052887 A JP 16052887A JP 16052887 A JP16052887 A JP 16052887A JP S645997 A JPS645997 A JP S645997A
Authority
JP
Japan
Prior art keywords
ferrite member
crystal
polycrystal
thermal expansion
ferrite
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
JP16052887A
Other languages
Japanese (ja)
Other versions
JPH0471874B2 (en
Inventor
Yoshinari Kozuka
Masato Osanawa
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.)
NGK Insulators Ltd
Original Assignee
NGK Insulators Ltd
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 NGK Insulators Ltd filed Critical NGK Insulators Ltd
Priority to JP16052887A priority Critical patent/JPS645997A/en
Publication of JPS645997A publication Critical patent/JPS645997A/en
Publication of JPH0471874B2 publication Critical patent/JPH0471874B2/ja
Granted legal-status Critical Current

Links

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  • Crystals, And After-Treatments Of Crystals (AREA)

Abstract

PURPOSE:To advantageously obtain the title ferrite material having high magnetic permeability in the high-frequency region by joining a polycrystal ferrite member and a single-crystal ferrite member having a thermal expansion coefficient different from that of the former member, and heating the joined material. CONSTITUTION:The polycrystal ferrite member and the single-crystal ferrite member having a thermal expansion coefficient different from that of the polycrystal ferrite member are joined, and heated to form the polycrystal ferrite member into a single crystal. As the difference in the thermal expansion coefficient between the polycrystal ferrite member and the single-crystal ferrite member is increased, more internal strains are imparted to the single-crystal ferrite. When the difference is excessively increased, cracks are generated in both members, and the permeability is also lowered. Accordingly, both members are selected so that the difference DELTAalpha between the thermal expansion coefficients alphameasured at 40-1,000 deg.C is controlled to <10X10<-7>/ deg.C.
JP16052887A 1987-06-27 1987-06-27 Production of high magnetic permeability ferrite material Granted JPS645997A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16052887A JPS645997A (en) 1987-06-27 1987-06-27 Production of high magnetic permeability ferrite material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16052887A JPS645997A (en) 1987-06-27 1987-06-27 Production of high magnetic permeability ferrite material

Publications (2)

Publication Number Publication Date
JPS645997A true JPS645997A (en) 1989-01-10
JPH0471874B2 JPH0471874B2 (en) 1992-11-16

Family

ID=15716914

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16052887A Granted JPS645997A (en) 1987-06-27 1987-06-27 Production of high magnetic permeability ferrite material

Country Status (1)

Country Link
JP (1) JPS645997A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09188597A (en) * 1996-01-08 1997-07-22 Toshiba Corp Method for producing oxide single crystal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09188597A (en) * 1996-01-08 1997-07-22 Toshiba Corp Method for producing oxide single crystal

Also Published As

Publication number Publication date
JPH0471874B2 (en) 1992-11-16

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