Manufacturing Methods and Technology Measure for Arc Plasma Sprayed Phase Shifter Elements.
Quarterly progress rept. no. 3, 1 Jan-31 Mar 76,
RAYTHEON CO WALTHAM MASS RESEARCH DIV
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Physical property data are given on a series of nonmagnetic Li-Ti ferrite dielectrics which have been used in arc plasma spraying of phase shifter samples. Thermal expansion data are given on a new series of compositions with variations in Li-Ti and Al content. A new fully reacted ferrite powder has been characterized in terms of particle size and magnetic properties. The functioning of the APS equipment has been substantially improved in this quarter, such that sample coating and transfer is now within twenty minutes. Loss of dielectric rods through thermal shock has recently been reduced significantly by lowering temperature in the transfer oven. Microwave and hysteresis loop data on a series of APS samples using a series of dielectrics and the new ferrite powder is reported.
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