Effect of sintering temperature on microstructure and humidity sensing properties of ZrO2-TiO2 for humidity sensor / Quratula'in Syahiirah Shamsul

• Main Author: Shamsul, Quratula'in Syahiirah
• Format: Student Project
• Language: English
• Published: Faculty Of Applied Sciences 2017
• Subjects: Atomic physics. Constitution and properties of matter; Composite materials; Heat
• Online Access: http://ir.uitm.edu.my/id/eprint/23651/1/PPb_QURATULA%27IN%20SYAHIIRAH%20SHAMSUL%20AS%20C%2017_5.PDF; http://ir.uitm.edu.my/id/eprint/23651/

Humidity sensors are widely used in domestic and industrial environments. 0.5Zr02-0.5Ti02 ceramic sintered at 900°C to 1200 °C, have been investigate for its structural and sensitivity properties at room temperature. The samples were prepared by the conventional ceramic method. Field emission scanning electron microscopy (FESEM) and impedance spectroscopy method were used for characterization of the microstructure and sensitivity properties of samples. The microstructures of the particles are in irregular shape with various particle size. The average grain size were calculated between 0.23 ~m and 0.32 ~m. There is no significant changes towards the size of microstructure of ceramics as sintering temperature increases. The sensitivity of materials towards humidity were investigated using impedance spectroscopy technique. The electrical impedance of samples were depended on humidity. The magnitude of impedance reflects the conductance of sensing material. 1100 °C is the optimum sintering temperature that produce highest impedance ratio than the other samples in two different relative humidity which is 25% and 61 %.