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Coatings 2017, 7(10), 164; https://doi.org/10.3390/coatings7100164

Chemical Vapor Deposition of Bi-Te-Ni-Fe on Magnesium Oxide Substrate and Its Seebeck Effect

1
Department of Mechanical Engineering, College of Engineering, California State Polytechnic University, Pomona, 3801 W Temple Avenue, Pomona, CA 91768, USA
2
Department of Electromechanical Engineering Technology, California State Polytechnic University, Pomona, 3801 W Temple Avenue, Pomona, CA 91768, USA
3
Diamond Bar High School, 21400 Pathfinder Road, Diamond Bar, CA 91765, USA
4
Department of Chemical and Materials Engineering, California State Polytechnic University, Pomona, 3801 W Temple Avenue, Pomona, CA 91768, USA
*
Author to whom correspondence should be addressed.
Received: 16 August 2017 / Revised: 20 September 2017 / Accepted: 29 September 2017 / Published: 1 October 2017
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Abstract

In this work, a Bi-Te-Ni-Fe complex coating material was obtained on magnesium oxide substrate by a single step ambient pressure chemical vapor deposition (CVD). Nickel acetate, bismuth acetate, iron (III) nitrate, and tellurium (IV) chloride dissolved in N,N-dimethylformamide (DMF) served as the metal sources for Ni, Bi, Fe, and Te, respectively. Hydrogen was used as the carrier gas. The substrate was kept at 500 °C in a quartz tube reaction chamber. The chemical vapor deposition time was two hours. Scanning electron microscopic observation revealed porous morphology of the deposited material with a needle-like submicron fine structure. These needle-like entities form networks with fairly uniform distribution on the substrate. Thermoelectric property test showed that the coating is p-type with a Seebeck coefficient of 179 µV/K. Time-dependent potential data were obtained to show the sensitivity of the Seebeck effect to temperature changes. View Full-Text
Keywords: ambient pressure chemical vapor deposition; coating; dendritic structure; Seebeck effect ambient pressure chemical vapor deposition; coating; dendritic structure; Seebeck effect
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Gan, Y.X.; Hamdan, A.S.; Gan, J.B.; Li, M. Chemical Vapor Deposition of Bi-Te-Ni-Fe on Magnesium Oxide Substrate and Its Seebeck Effect. Coatings 2017, 7, 164.

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