Processing, microstructure and thermoluminescence response of biomorphic yttrium oxide ceramics

Author(s)

Santos, S. C. ^[1] ; Yamagata, C. ^[1] ; Campos, L. L. ^[1] ; Mello-Castanho, S. R. H. ^[1]

Affiliation

^[1] IPEN, Av Prof Lineu Prestes 2242, Cidade Univ, Sao Paulo - Brazil

• Document type: Journal article
• Source: CERAMICS INTERNATIONAL; v. 42, n. 11, p. 13291-13295, AUG 15 2016.
• Web of Science Citations: 7

Abstract

The present work reports a fast-direct bio-prototyping process using Luffa Cylindrica vegetable sponge to produce biomorphic yttrium oxide ceramics with reticulated-porous architecture and thermoluminescence response. Processing parameters as rheology of yttrium oxide suspensions, bio-template surface treatment and thermal decomposition of bio-template were investigated. Shear thinning suspensions of 30 vol% yttrium oxide with apparent viscosity of 243mPa.s provided a successful impregnation of samples, whereby bio-templates with smooth ceramic layer and hierarchical reticulated architecture were formed. By thermal treatment at 1600 degrees C for 2 h biomorphic yttrium oxide ceramics with porous microstructure and TL response at 150 degrees C and lambda=550 nm were produced. The proposed fast direct bio-prototyping process is suitable for the production of ceramic components with complex shape and demonstrates potential for general applicability to any bio-template. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved. (AU)

• FAPESP's process: 14/23621-3 - Development of ceramic materials based on rare earth doped yttria for application in radiation dosimetry
• Grantee: Silas Cardoso dos Santos
• Support Opportunities: Scholarships in Brazil - Post-Doctoral