E F F E C T O F C O D O PA N T O N T H E R M A L CONDUCTIVITY OF ZnO
Keywords:
Thermal conductivity, zinc cobalt oxide, thermoelectric materialAbstract
The ZnO doped with Co under different conditions. Zn0.9Co0.1O and Zn0.8Co0.2O were synthesized from ZnO and Co3O4 by solid state reaction (SSR) method. The powder precursor were mixed by ball milling in deionized water for 2 h, calcined at 1073 K, pressed into pellet at 6.86 MPa, and sintered at 1423 K for 5 h. The XRD patterns of all samples corresponded with PDF#00-061-0685 which indicating a hexagonal structure. The SEMimages shows grain size of materials arrangement changed after sintering from 1 μm to 20μm. It was found that, thermal conductivity of ZnO decrease when doped Co (0.1, 0.2), it interesting for study thermoelectric properties.
References
Arda, L., Acikgoz, M., Dogan, N., Akcan, D., andCakiroglu, O. (2014). Synthesis, Characterizationand ESR Studies of Zn1−xCoxO Nanoparticles. J.Supercon. Nov. Magn., 27:799-804.
Kolodziejczak-Radzimska, A., and Jesionowski, T.(2014). Zinc Oxide-From Synthesis to Application:A Review. Mater. Rev., 7, 2833-2881.
Maensiri, S., Laokul, P., and Phokha, S. (2006). A simplesynthesis and magnetic behavior of nanocrystallineZn0.9 o0.1O powders by using Zn and Co acetates and polyvinyl pyrrolidone as precursors. J. Magn.Magn. Mate., 305:381-387.
Nolas, G.S., Sharp, J., and Goldsmid, H.J. (2001).Thermoelectrics: Basic principles and newmaterials developments. Verlag, Berlin, and Heidelberg: Springer.
Olorunyolemi, T., Birnboim, A., Carme, Y., Wilson, O.C.,and Lloyd, I.K. (2002). Thermal Conductivity of Zinc Oxide: From Green to Sintered State. J. Am.Ceram. Soci., 85(5):1249-1253.
Seo, S.Y., Kwak, C.H., Kim, S.H., Park, S.H., Lee, I.J. andHan, S.W. (2012). Synthesis and characterization of ferromagnetic Zn1−xCoxO films. J. Cryst. Growth,346:56-60.
Xu, D., Shi X.F., Cheng, X.N., Yang, J., Fan, Y., Yuan,H.M., and Shi, L.Y. (2010). Microstructure and electrical properties of Lu2O3-doped ZnO-Bi2O3-based varistor ceramics. Transac. Nonfer. Metal.Soc. China, 20:2303-2308.
