Replacement of position A in the structure Perovskite ABO3

Authors

  • María Dolores Durruthy Rodríguez Centro de Química Farmacéutica
  • Moisés Hernández García Ministerio de Ciencia, Tecnología y Medio Ambiente
  • Héctor Camacho Montes Ministerio de Ciencia, Tecnología y Medio Ambiente
  • Amaury Suárez Gómez Ministerio de Ciencia, Tecnología y Medio Ambiente
  • Dania Mayor Hernández Ministerio de Ciencia, Tecnología y Medio Ambiente

Abstract

The aim of this work was to study the possible influence of the bismuth introduction as dopant in ABO3 Perovskite structure, through a comparison of the results obtained with similar ceramics dopanted with lanthanum and using new densitying analytical proceedings during the sintering process. In the present work the system Pb1-3x/2Dpx(Zr0.54Ti0.46)O3 was studied, and Dp was the dopant used (lanthanum and bismuth in this case) at concentrations of 0.6, 0.8 and 1.0 %wt. The study is based upon a comparative analysis of dopants influence on sintering, a very important process on the obtention of piezoelectric ceramics. It was performed by determining the following parameters: relative density (r/rT), sintering rate (e·r) and volumetric shrinkage (q) (contractions related to the green compact). Conventional methods were used for obtaining ceramics starting from carbonates and oxides metallic (La2O3, Bi2O5, PbCO3, ZrO2, TiO2). Different sintering was carried out at 1 523 K for La and 1 423, 1 473 and 1 523K for Bi during 30, 100 and 300 min in both cases. X-Ray Diffraction techniques were used to validate the resultant crystallographic structure. The behavior of e·r and q for La resulted as expected; optimum conditions were reached for Tsinter. = 1 523 K during 100 min for 1 %(wt) resulting in a r/rT = 92 %. However, in the Bi case, even when sintering temperature was as low as 1 473 K, only a poor r/rT = 86 % is reached and the rest of the parameters did not show the expected behavior.

Published

2022-06-01

How to Cite

Durruthy Rodríguez, M. D. ., Hernández García, M. ., Camacho Montes, H., Suárez Gómez, A. ., & Mayor Hernández, D. . (2022). Replacement of position A in the structure Perovskite ABO3. NATIONAL CENTER FOR SCIENTIFIC RESEARCH (CENIC) CHEMICAL SCIENCES JOURNAL, 32(3), 171-175. Retrieved from https://revista.cnic.cu/index.php/RevQuim/article/view/1672

Issue

Section

Research articles