CAJ | 학술논문

研究了烧结温度对WO_3系电容-压敏复合陶瓷显微结构、非线性电学性能及介电性能的影响.随着烧结温度从1050 ℃到1200 ℃的升高,WO_3陶瓷的晶粒尺寸增大,压敏电压随之降低.在1150 ℃烧结条件下,掺杂0.8 mol% Y_2O_3 的WO_3 压敏陶瓷样品表现出优良的综合电性能,其非线性系数为3.5,相对介电常数为1.13×10~4.然而,过高的烧结温度,不利于样品的非线性电学性能.WO_3系电容-压敏复合陶瓷较适合的烧结温度为1150 ℃,这是因为,在此温度下最有利于样品的晶界势垒结构的形成.
연구료소결온도대WO_3계전용-압민복합도자현미결구、비선성전학성능급개전성능적영향.수착소결온도종1050 ℃도1200 ℃적승고,WO_3도자적정립척촌증대,압민전압수지강저.재1150 ℃소결조건하,참잡0.8 mol% Y_2O_3 적WO_3 압민도자양품표현출우량적종합전성능,기비선성계수위3.5,상대개전상수위1.13×10~4.연이,과고적소결온도,불리우양품적비선성전학성능.WO_3계전용-압민복합도자교괄합적소결온도위1150 ℃,저시인위,재차온도하최유리우양품적정계세루결구적형성.
The effect of sintering temperature on the microstructure, nonlinear electrical behavior, and dielectric properties of the Y_2O_3-doped WO_3 ceramics was studied. The decrease in breakdown voltage directly relates to the grain growth of WO_3 grains when increasing the sintering temperatures from 1050 to 1200 ℃. The capacitor-varistor of WO_3- 0.8 mol% Y_2O_3 composite sintered at 1150 ℃ exhibits the maximal nonlinear coefficient of 3.5 and the highest dielectric constant of 1.13 × 10~4. However, higher sintering temperature than 1150 ℃ is not favorable for the nonlinear electrical behavior of the WO_3 ceramics. The best nonlinear properties of the samples sintered at 1150 ℃ can be explained by the most efficient boundary barrier layer with can be formed sintered at the proper temperature.