Articles
  • A study on particle morphology and sintering behavior of yttria nano powder according to PVA mixing ratio in polymer solution synthesis route

  • Dae-Seon Leea, Heon Kongb and Sang-Jin Leea,b,*

  • aDepartment of Advanced Materials Science and Engineering, Mokpo National University, Muan 58554, Republic of Korea
    bResearch Institute of Ceramic Industry and Technology, Mokpo National University, Muan 58554, Republic of Korea

  • This article is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A porous and single-phase yttria powder was synthesized using PVA polymer solution method and a dense sintered yttria body was fabricated without adding a sintering aid. The aggregation of nanoparticles in the synthetic powder and the effect of nano pores on sintering behavior were investigated under variation of the PVA mixing ratio. The yttria nano-powder showed excellent sintering behavior, but the micropores in the grain of sintered body, which are caused by the influence of the nano pores in the synthetic powder, resulted in intragranular fracture behavior with lower sintered density. As a result of sintering the yttria powder synthesized at a mixing ratio of PVA 4:1 at 1650 oC for 2 h, a dense yttria sintered body having a relative density of about 98.7% was obtained. Unlike other specimens with different PVA mixing ratios, it showed intergranular fracture behavior with no pore on the fracture surface


Keywords: Yttria, Nano powder, PVA, Sintering, Fracture behavior, Microstructure

This Article

  • 2022; 23(2): 137-144

    Published on Apr 30, 2022

  • 10.36410/jcpr.2022.23.2.137
  • Received on May 5, 2021
  • Revised on Aug 22, 2021
  • Accepted on Aug 28, 2021

Correspondence to

  • Sang-Jin Lee

  • aDepartment of Advanced Materials Science and Engineering, Mokpo National University, Muan 58554, Republic of Korea
    bResearch Institute of Ceramic Industry and Technology, Mokpo National University, Muan 58554, Republic of Korea
    Tel : +82-61-450-2493 Fax: +82-61-450-2498

  • E-mail: lee@mokpo.ac.kr