Study on the Preparation of Fe2Mo3O12 and its Negative Thermal Expansion Property

Qin Qin Liu; Juan Yang; Xiao Nong Cheng

doi:10.4028/www.scientific.net/AMR.287-290.373

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 287-290Study on the Preparation of Fe2Mo3O12 and its...

Study on the Preparation of Fe₂Mo₃O₁₂ and its Negative Thermal Expansion Property

Abstract:

The title compound Fe₂Mo₃O₁₂ is prepared using a wet chemical method from aqueous solutions of ferrous nitrate and ammonium molybdate. The various process parameters were optimized to get a suitable precursor, which upon calcination at 700°C for 2 h gave a well crystalline product. The product was characterized by powder XRD to have a monoclinic unit cell of Fe₂Mo₃O₁₂. Its thermal expansion property was investigated by thermomechanical analyzer and high-temperature XRD. The typical monoclinic to orthorhombic phase transition happened at about 500°C, and Fe₂Mo₃O₁₂ shows great NTE (macro -13.43×10^-6°C^-1 and micro -21.77×10^-6°C^-1) property during the temperature range from 500°C to 800°C.

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Periodical:

Advanced Materials Research (Volumes 287-290)

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373-376

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https://doi.org/10.4028/www.scientific.net/AMR.287-290.373

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Online since:

July 2011

Authors:

Qin Qin Liu, Juan Yang, Xiao Nong Cheng

Keywords:

Fe₂Mo₃O₁₂, Negative Thermal Expansion, Wet Chemical Method

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