Thermal analysis of phase transformation kinetics in α-Al2O3 seeded boehmite and γ-Al2O3

C. Scott Nordahl, Gary L. Messing

Research output: Contribution to journalArticle

57 Scopus citations

Abstract

The effect of α-Al2O3 seeding on the transformation kinetics of high purity commercial boehmite and γ-Al2O3 was investigated. The effect of seed size, powder purity, sample homogeneity, and sample density on the transformation kinetics are discussed. The temperature and activation energy of the θ to α-Al2O3 phase transformation decreases for boehmite and γ-Al2O3 powders with an appropriate addition of α-Al2O3 seed particles. For 5 wt.% seeded (2×1015 seeds/cm3 γ-Al2O3) boehmite samples, the transformation temperature and activation energy were decreased by 85°C and 115 kJ/mol, respectively, compared to unseeded boehmite. For 5 wt.% seeded γ-Al2O3 samples, the transformation temperature and activation energy were decreased by 75°C and 170 kJ/mol, respectively, compared to unseeded γ-Al2O3.

Original languageEnglish (US)
Pages (from-to)187-199
Number of pages13
JournalThermochimica Acta
Volume318
Issue number1-2
StatePublished - Sep 7 1998

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

Fingerprint Dive into the research topics of 'Thermal analysis of phase transformation kinetics in α-Al<sub>2</sub>O<sub>3</sub> seeded boehmite and γ-Al<sub>2</sub>O<sub>3</sub>'. Together they form a unique fingerprint.

  • Cite this