caa a22 4500 463212126 CHVBK 20180405153144.0 cr unu---uuuuu 170326e20070801xx s 000 0 eng 10.1007/s00339-007-3967-z doi (NATIONALLICENCE)springer-10.1007/s00339-007-3967-z Microstructure, dielectric and piezoelectric properties of (K0.5Na0.5)NbO3-Ba(Ti0.95Zr0.05)O3 lead-free ceramics with CuO sintering aid [Elektronische Daten] [D. Lin, K.W. Kwok, H.L.W. Chan] Using an ordinary ceramic fabrication technique, we fabricated lead-free (1-x)(K0.5Na0.5)NbO3-xBa(Ti0.95Zr0.05)O3 ceramics with CuO sintering aid . Ba(Ti0.95Zr0.05)O3 diffuses into (K0.5Na0.5)NbO3 to form a new solid solution. The ceramics with perovskite structure possess orthorhombic phase at x≤0.04 and become tetragonal phase at x≥0.06. Both the paraelectric cubic-ferroelectric tetragonal and the ferroelectric tetragonal-ferroelectric orthorhombic phase transition temperatures decrease with increasing the concentration of Ba(Ti0.95Zr0.05)O3. The doping of CuO effectively promotes the densification of the ceramics. The coexistence of the orthorhombic and tetragonal phases at 0.04<x<0.06 and the improvement in sintering performances of the ceramics significantly enhance the piezoelectric and dielectric properties at room temperature. The ceramics with x=0.04-0.06 and y=0.75-1.50 possess excellent properties: d33=119-185pC/N, kP=37-44%, kt=35-49%, ε=341-1129, cosδ=0.7-4.4% and Tc=312-346°C. Springer-Verlag, 2007 Lin D. Department of Applied Physics and Materials Research Centre, The Hong Kong Polytechnic University, Kowloon, Hong Kong, P.R. China aut Kwok K.W. Department of Applied Physics and Materials Research Centre, The Hong Kong Polytechnic University, Kowloon, Hong Kong, P.R. China aut Chan H.L.W. Department of Applied Physics and Materials Research Centre, The Hong Kong Polytechnic University, Kowloon, Hong Kong, P.R. China aut Applied Physics A Springer-Verlag 88/2(2007-08-01), 359-363 0947-8396 88:2<359 2007 88 339 https://doi.org/10.1007/s00339-007-3967-z text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00339-007-3967-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lin D. Department of Applied Physics and Materials Research Centre, The Hong Kong Polytechnic University, Kowloon, Hong Kong, P.R. China aut NATIONALLICENCE 700 1- Kwok K.W. Department of Applied Physics and Materials Research Centre, The Hong Kong Polytechnic University, Kowloon, Hong Kong, P.R. China aut NATIONALLICENCE 700 1- Chan H.L.W. Department of Applied Physics and Materials Research Centre, The Hong Kong Polytechnic University, Kowloon, Hong Kong, P.R. China aut NATIONALLICENCE 773 0- Applied Physics A Springer-Verlag 88/2(2007-08-01), 359-363 0947-8396 88:2<359 2007 88 339 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer