Abstract
The effect of SnO2 addition on the loss characteristics of MnZn ferrites for use at 100 to 200 kHz was studied with special reference to the factors for core loss. Superior loss characteristics of 199 kW/m3 at 80°C, 100 kHz, and 200 mT, were achieved by SnO2 addition. The core loss at 100 kHz consists of hysteresis and eddy current losses. Addition of SnO2 is effective in reducing both hysteresis and eddy current losses. This improvement can be correlated with a uniformly sized grain microstructure and high resistivity of the grain boundaries.
