Effects of pH and calcination temperature on gel-combustion synthesizability of BaZr۰.۸Y۰.۲O۳ perovskite

Solid oxide fuel cells with their advantages such as high efficiency are now considered as efficient power generation equipment. Because of its proton conductivity, perovskite is used in ceramic fuel cell electrolyte, and the addition of dopant can improve its proton conductivity. In this research, BaZr۰.۸-xSrxY۰.۲O۳ (x=۰, ۰.۰۵, ۰.۱, and ۰.۱۵) perovskites were synthesized by gel-combustion method. Barium nitrate, zirconium nitrate, yttrium nitrate and strontium nitrate were used as raw materials. Based on DTA and TGA analyses, the required temperature for calcination was determined to be around ۱۰۰۰ °C. XRD and FTIR analyses were used to identify the phases. The synthesis was carried out under different conditions and the effects of pH and dopant percentage on the morphology and size of the particles were investigated by FESEM. The sintering process was completed at different temperatures and a relative density of ۹۴% was obtained at ۱۴۷۰ °C.Solid oxide fuel cells with their advantages such as high efficiency are now considered as efficient power generation equipment. Because of its proton conductivity, perovskite is used in ceramic fuel cell electrolyte, and the addition of dopant can improve its proton conductivity. In this research, BaZr۰.۸-xSrxY۰.۲O۳ (x=۰, ۰.۰۵, ۰.۱, and ۰.۱۵) perovskites were synthesized by gel-combustion method. Barium nitrate, zirconium nitrate, yttrium nitrate and strontium nitrate were used as raw materials. Based on DTA and TGA analyses, the required temperature for calcination was determined to be around ۱۰۰۰ °C. XRD and FTIR analyses were used to identify the phases. The synthesis was carried out under different conditions and the effects of pH and dopant percentage on the morphology and size of the particles were investigated by FESEM. The sintering process was completed at different temperatures and a relative density of ۹۴% was obtained at ۱۴۷۰ °C.

Keywords:

Gel-combustion synthesis , Perovskite , X-ray diffraction , Sintering , Dopant