Ionic conductivity YSZ electrolyte material for solid oxide fuel cell applications
- Sample is fixed in between the electrodes of sample holder and is placed in furnace.
- Thermocouple wires of sample holder are connected to furnace temperature controller and furnace temperature is programmed as per requirement.
- Electrode wires of sample holder are connected to LCR meter.
- LCR meter generates impedance(z) - phase angle(theta) data for frequencies varying from 20 to 2 MHz using Lab view software.
- Plot of z' (Zcos(theta) i.e.resisatance ) Vs z" ((-)Zsin(theta) i.e. capacitance ), named as 'Nyquist plot', is drawn.
- Bulk, grain and electrode impedance behavior are figured out from this Nyquist plot.