Title :
Paraelectric and elastic properties of ceramics with nominal composition (A1-xAx´)(BB´)O3(A,A´=Ba:Sr,Ca)
Author :
Ikawa, Hiroyuki ; Yamashiro, Michio ; Fukuhara, Mkio ; Takemoto, Minoru
Author_Institution :
Dept. of Appl. Chem., Kanagawa Inst. of Technol., Japan
Abstract :
Elastic moduli of highly dense ceramics in the system of the title composition were evaluated from acoustic velocities, which were measured by means of the ultrasonic pulse method. Elastic properties were compared with dielectric properties measured on the same disk to find the following: The decrease in Young´s modulus-mechanical softening-was correlated well with the increase in relative permittivity-dielectric softening-for the Ca containing solid solution of the terminal compound Ba(Mg1/3Ta2/3)O3. A marked similarity was noted between shear modulus and fQ for their composition dependencies
Keywords :
Young´s modulus; acoustic wave velocity; barium compounds; calcium compounds; ceramics; permittivity; shear modulus; solid solutions; BaCaMgO3TaO3; Young´s modulus; acoustic velocity; ceramics; composition dependence; dielectric softening; elastic moduli; mechanical softening; permittivity; shear modulus; solid solution; ultrasonic pulse method; Acoustic measurements; Acoustic pulses; Ceramics; Dielectric losses; Dielectric measurements; Earth; Permittivity measurement; Pulse measurements; Solids; Ultrasonic variables measurement;
Conference_Titel :
Applications of Ferroelectrics, 1998. ISAF 98. Proceedings of the Eleventh IEEE International Symposium on
Conference_Location :
Montreux
Print_ISBN :
0-7803-4959-8
DOI :
10.1109/ISAF.1998.786748
