Patents

A synthesis process of making 30-40% porous MgFe2O4 pellets have been developed. In addition, a process of making Ohmic contact on such porous pellets has been developed. The process has been optimized to keep the resistance of the pellets in the range 200-300MCX. It is a very cost effective synthesis process and highly sensitive towards relative humidity change due to resistance change compared to existing commercial humidity sensor based on the measurement of capacitance change. The response and recovery time of such pellets to humidity is few seconds. Magnesium ferrite pellet is being tested successfully for humidity sensing for last 12 months. Due to its resistance stability after long-term exposure to humidity, no flash heating is required.