Effect of lead content on the structure and piezoelectric properties of hard type lead titanate–zirconate ceramics

✍ Scribed by C. Miclea; C. Tanasoiu; C.F. Miclea; L. Amarande; A. Gheorghiu; I. Spanulescu; C. Plavitu; C.T. Miclea; M.C. Cioangher; L. Trupina; A. Iuga

• Publisher: Elsevier Science
• Year: 2007
• Tongue: English
• Weight: 744 KB
• Volume: 27
• Category: Article
• ISSN: 0955-2219
• DOI: 10.1016/j.jeurceramsoc.2007.02.094

✦ Synopsis

In the present investigation we studied the effect of lead content on a hard type ceramics starting from lack to excess PbO. Specimens of Pb x (Mn 0.017 Sb 0.033 Zr 0.48 Ti 0.47 )O 3 with 0.96 ≤ x ≤ 1.06 were prepared by conventional oxide mixing technique and sintered at temperatures between 1280 and 1350 • C. In samples with lower Pb concentration the pyrochlore phase appeared, while in those with higher Pb an excess of PbO phase was detected. These phases proved detrimental for the properties of sintered ceramics. The highest values of piezoelectric properties were observed only for samples with an excess lead of about 2% sintered at 1340 • C, indicating that it represents the optimum amount of PbO. For such samples, the density ρ was 7.77 g/cm 3 , the remnant polarization P r was 37 C/cm 3 the planar coupling coefficient k p was 0.57 and the charge constant d 33 was 340 pC/N.