Title:
MANUFACTURE OF RADIO WAVE ABSORBER
Document Type and Number:
Japanese Patent JPH05259732
Kind Code:
A
Abstract:
PURPOSE: To obtain a Ni-Zn ferrite radio wave absorber which both widens a radio wave absorption frequency range and makes an absorber into a thin plate. CONSTITUTION: 66.1g Fe2 O3 , 23.1g Zn, 8.8g NiO, 0.5g MnO2 , 0.5g Co3 , and 0.1g CuO are mixed. Then they are dried and ground, and then baked preliminarily at 900 deg.C for 2 hours, and the preliminarily baked raw material is ground and compacted under pressure of 2tons/cm<2> . Then the material is heated up to 1250 deg.C at a temperature rise rate of 2 to 12 deg.C/minute, held for about 2 to 6 hours, and cooled at a cooling speed of 2 to 12 deg.C/minute.
Inventors:
Golden dragon
Gold
Ding Zhen
Zhu Jun
Gold
Ding Zhen
Zhu Jun
Application Number:
JP21516192A
Publication Date:
October 08, 1993
Filing Date:
August 12, 1992
Export Citation:
Assignee:
Korea Institute of Science and Technology
International Classes:
C04B35/26; C04B35/30; H01F1/00; H01F1/34; H01Q17/00; H05K9/00; (IPC1-7): H01Q17/00; C04B35/26; C04B35/30; H01F1/00; H01F1/34; H05K9/00
Domestic Patent References:
| JPH01305503A | 1989-12-08 | |||
| JPH0388766A | 1991-04-15 | |||
| JPS6289747A | 1987-04-24 |
Attorney, Agent or Firm:
Fumio Sasashima