Lead-free piezoceramic material based on bismuth sodium titanate (BNT)

摘要

The invention relates to a lead-free piezoceramic material based on bismuth sodium titanate (BNT) of the basic composition x (Bi0.5Na0.5) TiO3 - yBaTiO3 - zSrTiO3 with x + y + z = 1 and 0 x 1, 0 y 1, 0 ≤ z ≤ 0.07 or x (Bi 0.5 Na 0.5) TiO 3 - y BaTiO 3 - z CaTiO 3 where x + y + z = 1 and 0 x 1, 0 y 1, 0 z ≤ 0.05 or x (Bi 0.5 Na 0.5) TiO 3 - y (Bi 0.5 K 0.5) TiO 3 - zBaTiO 3 with x + y + z = 1 and 0 x 1, 0 y 1, 0 ≤ z 1 characterized by the addition of a phosphorus-containing material in such an amount that the concentration of phosphorus in the piezoceramic material is 100 to 2000 ppm.