KR930005286A - Manufacturing method of radio wave absorber - Google Patents

Manufacturing method of radio wave absorber Download PDF

Info

Publication number
KR930005286A
KR930005286A KR1019910013920A KR910013920A KR930005286A KR 930005286 A KR930005286 A KR 930005286A KR 1019910013920 A KR1019910013920 A KR 1019910013920A KR 910013920 A KR910013920 A KR 910013920A KR 930005286 A KR930005286 A KR 930005286A
Authority
KR
South Korea
Prior art keywords
manufacturing
radio wave
wave absorber
hours
maintained
Prior art date
Application number
KR1019910013920A
Other languages
Korean (ko)
Other versions
KR930011547B1 (en
Inventor
김경용
김왕섭
정형진
주윤돈
Original Assignee
박원희
한국과학기술연구원
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 박원희, 한국과학기술연구원 filed Critical 박원희
Priority to KR1019910013920A priority Critical patent/KR930011547B1/en
Priority to JP4215161A priority patent/JPH05259732A/en
Publication of KR930005286A publication Critical patent/KR930005286A/en
Application granted granted Critical
Publication of KR930011547B1 publication Critical patent/KR930011547B1/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems

Landscapes

  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Magnetic Ceramics (AREA)
  • Soft Magnetic Materials (AREA)
  • Hard Magnetic Materials (AREA)
  • Aerials With Secondary Devices (AREA)

Abstract

내용 없음.No content.

Description

전파흡수체의 제조방법Manufacturing method of radio wave absorber

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

제1도는 본 발명 실시예 시편의 전자현미경 사진으로서, (a)는 연마면이고, (b)는 파단면이고,1 is an electron micrograph of a sample of an embodiment of the present invention, (a) is a polishing surface, (b) is a fracture surface,

제2도 및 제3도는 각각 본 발명 실시예 시편의 주파수 변화에 대한 감쇠량의 변화거동을 나타낸 그래프.2 and 3 are graphs showing the change behavior of the attenuation with respect to the frequency change of the specimen of the embodiment of the present invention, respectively.

Claims (1)

Fe2O366.1g,ZnO 23.1g, NiO 8.8g, MnO20.5g, Co3O40.5g 및 CuO 1.0g을 혼합하여 건조 및 분쇄한 후900℃에서 2시간 하소하여 다시 분쇄하고 성형한 다음 2-12℃분의 승온속도로 1250℃라지 가열하여 2-6시간동안 유지시킨 후 2-6시간동안 유지시킨 후 2-12℃/분의 냉각도로 냉각하여 페라이트 소결체를 제조함에 특징으로 하는 전파흡수체의 제조방법.66.1 g of Fe 2 O 3 , 23.1 g of ZnO, 8.8 g of NiO, 0.5 g of MnO 2, 0.5 g of Co 3 O 4, and 1.0 g of CuO were mixed and dried, calcined at 900 ° C. for 2 hours, and then ground and molded again. It is then heated to 1250 ℃ large at a heating rate of 2-12 ℃ minutes and maintained for 2-6 hours and then maintained for 2-6 hours and then cooled to a cooling of 2-12 ℃ / min characterized in that to produce a ferrite sintered body Method of manufacturing a radio wave absorber. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019910013920A 1991-08-13 1991-08-13 Electric wave absorber KR930011547B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1019910013920A KR930011547B1 (en) 1991-08-13 1991-08-13 Electric wave absorber
JP4215161A JPH05259732A (en) 1991-08-13 1992-08-12 Manufacture of radio wave absorber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019910013920A KR930011547B1 (en) 1991-08-13 1991-08-13 Electric wave absorber

Publications (2)

Publication Number Publication Date
KR930005286A true KR930005286A (en) 1993-03-23
KR930011547B1 KR930011547B1 (en) 1993-12-10

Family

ID=19318503

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019910013920A KR930011547B1 (en) 1991-08-13 1991-08-13 Electric wave absorber

Country Status (2)

Country Link
JP (1) JPH05259732A (en)
KR (1) KR930011547B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112194481A (en) * 2020-09-28 2021-01-08 兰州大学 Nickel-zinc ferrite material and preparation method thereof

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109650933B (en) * 2019-01-28 2021-03-30 陕西科技大学 Porous Co3O4/Al2SiO5Low-density wave-absorbing type complex phase ceramic and preparation method thereof

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6289747A (en) * 1985-06-15 1987-04-24 Tdk Corp Electrical radiation absorbing material
JP2794293B2 (en) * 1988-06-02 1998-09-03 住友特殊金属 株式会社 Radio wave absorption material
JPH0388766A (en) * 1989-08-30 1991-04-15 Inax Corp Cu-zn ferrite material for radio wave absorber

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112194481A (en) * 2020-09-28 2021-01-08 兰州大学 Nickel-zinc ferrite material and preparation method thereof
CN112194481B (en) * 2020-09-28 2022-08-23 兰州大学 Nickel-zinc ferrite material and preparation method thereof

Also Published As

Publication number Publication date
KR930011547B1 (en) 1993-12-10
JPH05259732A (en) 1993-10-08

Similar Documents

Publication Publication Date Title
GB693596A (en) Improvements in or relating to electromagnetic devices for amplitude-modulation of a
US3565806A (en) Manganese zinc ferrite core with high initial permeability
KR960019341A (en) Non-Boundary Manganese Oxide Crystals and Switching Magnetoresistive Devices
KR930005286A (en) Manufacturing method of radio wave absorber
US2685568A (en) Soft ferromagnetic mixed ferrite material
JP2799614B2 (en) Oxide magnetic materials for radio wave absorbers
US2924573A (en) Process of making manganese-zinc-ferrite
JPS565331A (en) Oxide type magnetic material of low electric power loss for use in high temperature range
KR930005289A (en) Thin wave absorber and its manufacturing method
KR930007004A (en) Low Temperature Sintering Wave Absorber
GB974853A (en) Improvements in or relating to polycrystalline ferrite bodies
KR940007909A (en) Ferrites for Chip Inductor Manufacturing
KR910001814A (en) Varistor material manufacturing method
KR920000666A (en) Low temperature sintered piezoelectric ceramic material manufacturing method
JPS5264852A (en) Ferrimagnetic substance circuit element
KR970008750B1 (en) Magnetic material comprising oxides capable of being sintered at low temperature
GB1227459A (en)
SU361472A1 (en) FERROMAGNETIC MATERIAL
RU2067329C1 (en) Ferrite material
JPS565332A (en) Oxide magnetic material
JPS551188A (en) High frequency blocking element
JPS5582504A (en) Magnetic amplifying element
KR940009688A (en) High frequency band EMI filter composition
KOENIG et al. Soft ferrites with special properties[Final Report]
SU496609A1 (en) Ferrite material

Legal Events

Date Code Title Description
A201 Request for examination
G160 Decision to publish patent application
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20000630

Year of fee payment: 8

LAPS Lapse due to unpaid annual fee