High Temperature Thermodynamics of the Iron Oxide System

Cation self-diffusion in LaFeO3 measured by the solid state reaction method

“…5 and 6. For measurements below pO 2 = 6 · 10 − 4 atm, Fe 3 O 4 is in principle the stable iron oxide, but it is uncertain to which extent the Fe 2 O 3 will have been reduced during the experiment, and it is in turn uncertain whether this may have influenced the growth of the LaFeO 3 [17].…”

“…At the phase boundary Fe 2 O 3 contains ca. 0.1% oxygen vacancies, and may be represented as Fe 2 O 3 − δ with δ≈0.003 [17]. In comparison, La 2 O 3 has negligible oxygen nonstoichiometry [19].…”

Surface Reactivity of Iron Oxide Pigmentary Powders toward Atmospheric Components: XPS and Gravimetry of Oxygen and Water Vapor Adsorption

“…This condition can well be fulfilled lower portion is twice that of the upper portion inset. In by the closely packed hexagonal structure of highly stoichionone of these cases were any obvious morphological changes metric a-Fe 2 O 3 (30). The presence, for example, of a tetragbrought about by oxygen adsorption.…”

Autocatalytic Reduction of Hematite with Hydrogen under Conditions of Surface Control: A Vacancy-Based Mechanism

“…The extent of this 1 hr, the measurement of conductivity was started. The measured value at this stage is the conductivity of the bulk deviation can be expressed as ͳ in the formula Fe 2 O 3Ϫͳ , following Salmon (35). In view of this, reaction [2a] can stoichiometric material, b .…”