Lead-free relaxors with "TTB" structure containing either lanthanum or bismuth
Résumé
TTB-type lead-free relaxor compositions containing either lanthanum or bismuth were studied. Their temperature and frequency dielectric properties were investigated on ceramics. The relaxor characteristics of similar compositions containing either lanthanum or bismuth were compared. The value of Tm, the temperature of the maximum of r, was systematically higher for bismuth samples...