Fine Particle Li-Ferrite for APS Millimeter-Wave Phase Shifter.

reportActive / Technical Report | Accession Number: ADA049136 | Open PDF

Abstract:

Powders composed of spheroidal particles 0.5-0.6 micrometer average size have been synthesized by rapidly quenching melts in the system lithium carbonate-boron oxide-iron oxide. The flow characteristics of the powders are adequate to fabricate Li-ferrite ceramic bodies by arc-plasma-spraying APS the powders. Post annealing leads to densification and grain growth with concomitant decrease in coercive force and increase in magnetization and remanence. Inversions in x-ray diffraction line intensity disappears with APS and annealing, yielding expected cation distribution. The inadvertent introduction of zinc accounts for the observed inverse relationship between magnetic moment and Curie temperature. The synthetic powder process requires further refinement to improve powder flow characteristics. Author

Author(s):
Tauber, A. ; Savage, R. O., Jr. ; Collins, T. ; Mitchell, J. ; Shappirio, J. R.
Author Organization(s):
ARMY ELECTRONICS COMMAND FORT MONMOUTH N J
Descriptive Note:
Research and development technical rept.,
Supplementary Note:
Presented at the Annual Conference on Magnetism and Magnetic Materials (23rd) 8-11 Nov 77, Minneapolis, MN.
Pagination:
0011

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
ECOM-4556
Task Number(s):
E7
Project Number(s):
1L161102AH47
 Subject Terms
Joint Capability Areas:
JCA_5_Command and Control; JCA_1_Force Support
Communities of Interest:
Advanced Electronics
Descriptor(s):
*MICROWAVE EQUIPMENT, *FERRITES, *PHASE SHIFT CIRCUITS, MAGNETIC PROPERTIES, POWDERS, FABRICATION, MILLIMETER WAVES, PARTICULATES, PLASMA SPRAYING, LITHIUM COMPOUNDS, SPINEL, ARC SPRAYING
Field(s)/Group(s):
Inorganic Chemistry, Electrical and Electronic Equipment, Manufacturing and Industrial Engineering and Control of Production Systems, Electricity and Magnetism
Keyword(s):
Phase shifters, APS(Arc Plasma Spraying), Arc plasma spraying, ASH47, WU031, PE61102A
Report Date:
1977 Dec 01