en گروه سرامیک Ceramic Materials and Engineering Research Paper Research Paper <span style="font-size:12pt"><span style="unicode-bidi:embed"><span new="" roman="" style="font-family:" times="">Piezoelectric ceramics based on lead zirconate titanate (PZT) with a composition of (Pb_0.88-3x/2Sr_0.12La_x)(Zr_0.54Ti_0.44Sb_0.02)O₃ where x=0.0, 0.005 and 0.01 were synthesized using conventional solid state sintering at 1280&deg;C. The effect of lanthanum substitution on the microstructure, ferroelectric and piezoelectric properties of the samples was studied. The results showed that lanthanum substitution was beneficial for densification of the samples during sintering and the samples with 1.0 mole% lanthanum exhibited the maximum density of 7.34 g.cm^-3 when sintered at 1280&deg;C. Moreover, the piezoelectric coefficient (d₃₃), relative dielectric constant (<span style="font-family:Symbol">e</span>_r), dielectric loss (tan&delta;), electromechanical coupling coefficient (k_p) and <a name="_Hlk211158173">the Curie temperature</a> (<a name="_Hlk211158348">T_C</a>) of the samples reached the optimal values of 635 pC/N, 3000, 0.018, 0.67 and <a name="_Hlk211158835">195&deg;C </a>respectively at 0.5 mole% lanthanum substitution. Furthermore, the bulk density (<a name="_Hlk211158213">&rho;</a>) was 7.31 g.cm^{-<a name="_Hlk211154432">3</a>} for the same sample. The results indicate that the lanthanum doped PSZTS ceramics can be hopefully used in applications such as <a name="_Hlk211158996">pulsed transmitting transducers, high sensitivity receivers and actuators with large displacements.</a></span></span></span><br> &nbsp; PSZTS,Lanthanum additive,ferroelectric and piezoelectric properties 0 0 http://ijmse.iust.ac.ir/browse.php?a_code=A-10-4243-2&slc_lang=en&sid=1 H. Goudarzi hssngoudarzi@gmail.com 1800319475328460022234 1800319475328460022234 No PhD Candidate Saeid Baghshahi baghshahi@eng.ikiu.ac.ir 1800319475328460022235 1800319475328460022235 Yes Imam Khomeini International University R. Tabarzadi amir47uk@gmail.com 1800319475328460022236 1800319475328460022236 No Material and Energy Research Center