Degree Type

Dissertation

Date of Award

1989

Degree Name

Doctor of Philosophy

Department

Materials Science and Engineering

First Advisor

Mufit Akinc

Abstract

A homogeneous precipitation technique was developed for synthesis of uniform submicron sulfide powders. ZnS powders were prepared from decomposition of thioacetamide in aqueous zinc solutions. Influence of various experimental parameters including concentration and chemical nature of various ions, temperature, and time on the powder morphology were studied. ZnS powders were characterized with respect to size, shape, and phase purity;Monosized ZnS powders were hot-pressed in a flowing N[subscript]2 atmosphere in the temperature range of 800°C to 900°C. Influence of temperature, pressure and time on the density and microstructure of the specimens was investigated. Pressure sintering maps were constructed and the dominant densification mechanism was identified at various stages of the process.

DOI

https://doi.org/10.31274/rtd-180813-11264

Publisher

Digital Repository @ Iowa State University, http://lib.dr.iastate.edu/

Copyright Owner

Ahmet Celikkaya

Language

en

Proquest ID

AAI9003506

File Format

application/pdf

File Size

140 pages

Share

COinS