سال انتشار: ۱۳۹۰

محل انتشار: پنجمین کنفرانس بین المللی پیشرفتهای علوم و تکنولوژی

تعداد صفحات: ۹

نویسنده(ها):

R Motahari – Department of Materials Science Engineering, School of Engineering, , Shiraz University
A Barzegar – Professor in Materials Science Engineering, Department of Materials Science Engineering, School ofShiraz University,

چکیده:

Solid-state reaction processing technique was used to prepare ZnO-doped ZrO2 samples. The XRD patterns of the samples showed that Zr4+ ions substituted Zn2+ ions in the Zinc oxide structure. The SEM results revealed that the grain size of the Zinc oxide decreases with increasing ZrO2 content. Thermoelectric measurements show that the addition of ZrO2 to ZnO led to a significant increase in the electrical conductivity and a decrease in the absolute value of the Seebeck coefficient. Significant reduction of the thermal conductivity was observed as compared to pure ZnO sample. The figure of merit ZT values of Zno-doped ZrO2 samples are higher than the ZnO pure sample, specially at high temperatures , this demonstrated that the ZrO2 addition is fairly effective for enhancing thermoelectric properties