Author :
Choi, U-Sung ; Kim, Tae-Won ; Jung, Seung-Woo
Author_Institution :
Dept. of Electron. Mater. Eng., WonKwang Univ., Iksan, South Korea
Abstract :
Using the 2-probe methods, the conductivities, dielectric loss factors, capacitances, and impedances were investigated to study the electrical properties for pure, ball-milled, 1, 2, 3, 5, 7 mol% SnO2 added ZnO. We estimated the frequency dependent ac-conductivities, dielectric loss factors, and capacitances for infinitely long frequencies. The asymptotic ac-conductivities for 3, 5, and 7 mol% SnO2 added ZnO are -5.16, -5.94, and -6.05, respectively. The calculated relative dielectric constant of 3, 5, and 7 mol% SnO2 added ZnO are 55, 20, and 14 at the semicircle peak on the impedance spectrum, respectively. Therefore, the decrease of electrical conductivity of specimens was explained by the increase of grain resistance due to the increase of the number of ZnO grains
Keywords :
II-VI semiconductors; capacitance; ceramics; dielectric losses; dielectric materials; electric impedance; electrical conductivity; permittivity; powder technology; tin compounds; zinc compounds; ZnO-SnO2; asymptotic AC-conductivities; ball-milled material; capacitance; dielectric loss factors; electric impedance; frequency dependent AC-conductivities; grain resistance; relative dielectric constant; two-probe methods; Capacitance; Conductivity; Dielectric constant; Dielectric losses; Electric resistance; Electric variables; Frequency dependence; Frequency estimation; Impedance; Zinc oxide;
Conference_Titel :
Properties and Applications of Dielectric Materials, 1997., Proceedings of the 5th International Conference on
