Accession Number : AD0289034

Title :   DEVELOPMENT OF A FERRITE MATERIAL FOR A HIGH POWER PHASE SHIFTER AT S-BAND

Corporate Author : AIRTRON INC MORRIS PLAINS N J

Report Date : NOV 1962

Pagination or Media Count : 1

Abstract : Additional compositions in the system NiF e2(x + y)Al sub x Ga sub y O4 were evaluated. Various experiments were performed to explain the high loss, high saturation magnetization and high Curie temperatures obtained on some samples. Loss tangents of less than .003 were obtained on several samples at 20 mc and at S-band. A tan of .004 was obtained on one hot pressed sample. It was concluded that the high loss values obtained on the sintered samples were due to absorbed water introduced in the sample during previous porosity and density measurements and not completely removed before measuring tan. The high saturation and high Curie temperatures obtained in the hot pressed samples appear to be caused by incomplete reaction. Annealing experiments were found to confirm hypothesis. The higher than expected saturation magnetizations observed on some conventionally processed samples may be the result of a change in site preference of aluminum in the presence of gallium. Further experiments to establish this are discussed. (Author)

Descriptors :   *FERRITES, *FERROMAGNETIC MATERIALS, *PHASE SHIFT CIRCUITS, DESIGN, MICROWAVE EQUIPMENT, NICKEL COMPOUNDS, OPERATION, PREPARATION, RADIOFREQUENCY POWER

Distribution Statement : APPROVED FOR PUBLIC RELEASE