Thermal Decomposition Behavior of Praseodymium Oxides, Hydroxides, and Carbonates

Abstract

Thermal decomposition behavior was studied for Pr6O11, Pr2O3, Pr(OH3), and Pr2(CO3)3 • xH2O. In the course of transformation, the intermediate species were different for each starting material, as well as the surface area and morphology of the final thermal decomposition products. During thermal decomposition in the temperature range of 200⁰C up to 1400⁰C, mass losses for each species were attributed to the removal of hydroxide and carbonate species based on changes in the subrared bands for each powder for hydroxide groups at ≈3600 cm -1 and carbonate groups at ≈1300-1500 cm -1. X-ray diffraction analysis identified the final decomposition product at 1400⁰C for each species as Pr6O11 regardless of the starting material. A decrease in surface area and increase in equivalent particle radius for each final Pr6O11 product is attributed to sintering. The presence of hydroxyl and carbonate groups in the Pr6O11, Pr2O3, Pr(OH3), and Pr2 (CO3)3 • xH2O precursor dictate the morphology of thermally decomposed Pr6O11.

Department(s)

Materials Science and Engineering

International Standard Serial Number (ISSN)

0020-1685

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2011 Maik Nauka-Interperiodica Publishing, All rights reserved.

Publication Date

01 Sep 2011

Link to Full Text

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