Low Sintering Temperature Effect on Crystal Structure and Dielectric Properties of Lead-Free Piezoelectric BiNaTiO-NaFeTiO.

BiNaTiO (BNT) emerges as a promising ferroelectric and piezoelectric lead-free candidate to substitute the contaminant Pb[TiZr]O (PZT). However, to obtain optimal ferroelectric and piezoelectric properties, BNT must be sintered at high temperatures. In this work, the reduction of sintering temperature by using iron added to BNT is demonstrated, without significant detriment to the dielectric properties.

Enhanced Multiferroic Properties of YFeO by Doping with Bi.

Tthe present work studied the cationic substitution of Y by Bi on the crystal structure of orthorhombic YFeO and its effect over magnetic, dielectric and electric properties of multiferroic yttrium orthoferrite. Stoichiometric mixtures of YO, FeO and BiO were mixed and milled for 5 h using a ball to powder weight ratio of 10:1 by high-energy ball milling. The obtained powders were pressed at 1500 MPa and sintered at 700 °C for 2 h.

Enhancement in Curie Temperature of Yttrium Iron Garnet by Doping with Neodymium.

The effect of the substitution of Y by Nd on the structural and magnetic properties of neodymium-doped yttrium iron garnet, NdYFe₅O with in the range of 0⁻2.5, is presented. Oxide powders of Fe₂O₃, Nd₂O₃, and Y₂O₃ were mixed in a stoichiometric ratio and milled for 5 h using high-energy ball milling, before being uniaxially pressed at 900 MPa and annealed at 1373 K for 2 h to obtain NdYFe₅O (0 ≤ ≤ 2.