Synthesis of Zn-Doped PbTiO3 ceramics via solid state reaction technique

Date

11-2006

Degree

Bachelor of Science in Applied Physics

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Marvin U. Herrera

Abstract

The synthesis of lead titanate was done via solid state reaction technique. The samples were calcined at 800°C for five hours. Three samples were fabricated to observe the effects of different ZnO concentration on PTO. Four samples were used to study the effect of sintering temperature on the material. The samples were characterized using different techniques such as X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Differential Thermal Analysis (DTA), Porosity and Bulk Density Tests, and Capacitance and Dielectric Constant Tests. In the XRD pattern, it was found that PTO was present in all the samples prepared. In the Zn-doped samples, the ZnO was hardly detected by XRD showed by lower peaks. In the SEM images, tetragonality of PTO was obtained in the sample sintered at 900°C. Even the porosity and bulk density test coincides with the SEM. In the Zn-doped PTO samples, the two samples sintered at higher temperatures showed the presence of inhomogeneous phases while the two samples sintered at lower temperatures showed a homogeneous phase. Homogeneity and flattening of grains were attributed in the SEM images of the Zn-doped samples. Through the DTA, the melting points were determined and observed to resemble a binary phase mixture. Through the Capacitance and Dielectric Constant tests, the relative relationships of (a) sintering time and capacitance, (b) capacitance and ZnO composition, (c) dielectric constant and sintering temperature, and (d) dielectric constant and ZnO composition were determined.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

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