Physicochemical properties of single phase La 2Zr 2O 7 powder

Maria Ophelia D. Jarligo, Yan Sheng Kang, Akira Kawasaki

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Powders of La 2O 3 and ZrO 2 in ethanol based suspension were planetary ball milled at 200 rpm for 12 hours, dried and then heat treated at 1500°C for one hour to synthesize single phase of La 2Zr 2O 7 which is a very promising thermal barrier coating material. Planetary milling results to particle diminution together with an increase in surface area with increasing milling time as investigated by FE-SEM, particle size analyses and BET method. The formation of single phase La 2Zr 2O 7 with pyrochlore structure was confirmed by X-ray diffraction and TEM analyses. DSC investigation on the milled powders revealed the dehydroxylation reaction at around 320°C and complete disintegration of ethanol including decarboxylation at around 500°C. The absence of these peaks in the thermal plot for the single phase material confirms its thermal stability at 1500°C sintering temperature.

Original languageEnglish
Pages (from-to)189-192
Number of pages4
JournalMaterials Transactions
Volume46
Issue number2
DOIs
Publication statusPublished - 2005 Feb 1

Keywords

  • Lanthanum zirconate
  • Physicochemical properties
  • Planetary milling

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Fingerprint Dive into the research topics of 'Physicochemical properties of single phase La <sub>2</sub>Zr <sub>2</sub>O <sub>7</sub> powder'. Together they form a unique fingerprint.

  • Cite this