Electrical and Microstructural Properties of Varistors Based on Nanostructured Tetra-Needle Like Zinc Oxide Powders

Felipe Antonio Lucca Sánchez; Diego Pereira Tarragó; A.S. Takimi; V.C. Sousa; Carlos Pérez Bergmann

doi:10.4028/www.scientific.net/MSF.727-728.533

Paper Titles

Structural Characterization, and Magnetic Morphological Study of Ni⁺² Doped ZnO Synthesized by Combustion Reaction Application for DMS
p.511

Effect of Attrition Milling and Calcination Temperature on Phase Composition of Strontium-and Magnesium-Doped Lanthanum Gallate
p.516

Ceramic Coating Based on La, Sr and Co on Ferritic Stainless Steel for ITSOFC Interconnects
p.522

Magnetic Evaluation of Ni-Zn Ferrites Doped with Aluminium
p.528

Electrical and Microstructural Properties of Varistors Based on Nanostructured Tetra-Needle Like Zinc Oxide Powders
p.533

Variation of Resonant Frequency with Temperature in Ceramic Resonators Based on Ba₂Ti₉O₂₀ Compositions
p.539

Porous Ceramic as Air Humidity Sensors
p.545

Quantification of Phase Compositions Present in the System [(NiO)_x].[(CoO)_1-x].[(Al₂O₃)], 0.05 ≤ X ≤ 0.95, and the Effect in the Electrical Properties of Semiconductor as a Consequence of the CO⁺² Variation
p.550

Production of Oxide Ceramic Matrix Composites by a Prepreg Technique
p.556

HomeMaterials Science ForumMaterials Science Forum Vols. 727-728Electrical and Microstructural Properties of...

Electrical and Microstructural Properties of Varistors Based on Nanostructured Tetra-Needle Like Zinc Oxide Powders

Abstract:

t is well known that nanostructured materials have relevant influences in properties behavior that can be achieved when compared with conventional materials. In this study is proposed an investigation of the electrical and microstructural properties of zinc oxide based varistors prepared with nanostructured zinc oxide powder obtained by a thermal evaporation process. Zinc oxide powder morphology was investigated by scanning and transmission electron microscopy (SEM and TEM, respectively) and the specific surface area evaluated by adsorption of N₂. The varistors were prepared by the mixture of typical dopants with zinc oxide powders in a ball mill. The surface area of zinc oxide powder used was 17.4 m²/g with tetra-needle like morphology. After powder mixture process it was observed by TEM micrographs that most of the tetrapod shaped zinc oxide broke into needles well mixed with dopant particles. The compressed powders were sintering at 1050, 1150 and 1250°C for 1.5 h and densification over 94% were achieved in all tested temperatures. Preliminary electrical characterization reveals that nanostructured zinc oxide compositions have interesting varistor properties.

You might also be interested in these eBooks

View Preview

Info:

Periodical:

Materials Science Forum (Volumes 727-728)

Pages:

533-538

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.727-728.533

Citation:

Cite this paper

Online since:

August 2012

Authors:

Felipe Antonio Lucca Sánchez, Diego Pereira Tarragó, A.S. Takimi, V.C. Sousa, Carlos Pérez Bergmann

Keywords:

Nanostructured ZnO, Tetra-Needle Like, ZnO Varistor

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

Citation:

References

[1] M. Matsuoka: Jap. J. of App. Phys. Vol. 10 (1971), pp.736-746.

Google Scholar

[2] V. C de Sousa in: Síntese de pós reação de combustão para a obtenção de varistores de ZnO. Doutorado (Tese). São Carlos 2000. Universidade Federal de São Carlos (UFSCar). (SP).

DOI: 10.21115/jbes.v14.suppl2.p180-6

Google Scholar

[3] J. Jose and M. A. Khadar: Mater. Sci. and Eng. A304–306 (2001), p.810.

Google Scholar

[4] S. Bernik, S. Macek and A. Bui: J. European Ceramic Soc. Vol. 24 (2004), p.1195.

Google Scholar

[5] A. Janotti and C.G. Van de Walle: Rep. Prog. Phys. Vol. 72 (2009), p.1.

Google Scholar

[6] F. Porterin: Zinc Handbook: Properties, Processing, and Use in Design, CRC Press (1991).

Google Scholar

[7] Z.L. Wang: Mater. Today Vol. 7 (2004), p.26.

Google Scholar

[8] N. Wang, Y. Cai and R.Q. Zhang: Mater. Sci. and Eng. Vol. 60 (2008) p.1–51.

Google Scholar

[9] R. Bacsa, Y. Kihn, M. Verelst, J. Dexpert, W. Bacsa and P. Serp: Surface & Coatings Tech. Vol. 201 (2007), p.9200.

DOI: 10.1016/j.surfcoat.2007.04.037

Google Scholar

[10] V.C. Sousa, M.R. Morelli and R.H.G.A. Kiminami: J. Mater. Sci: Mater. in Electronics Vol. 13 (2002), p.313.

Google Scholar

[11] J. Wong: J. Appl. Phys. Vol. 46 (1975), p.1653.

Google Scholar

[12] M.L. Arefin, F. Raether, D. Dolejs and A. Klimera: Ceramics International Vol. 35 (2009), p.3313.

Google Scholar

[13] H. Bidadi, Sh.M. Hasanli, H. Hekmatshoar, S. Bidadi and S.M. Aref: Vacuum Vol. 84 (2010), p.1232.

DOI: 10.1016/j.vacuum.2009.10.031

Google Scholar