<abstract xmlns="http://www.w3.org/1999/xhtml">
				
				<p> Oxide varistors are made of inhomogeneous material whose properties are determined by active grain boundaries. It is essential that in the microstructure of a varistor only active grain boundaries are present as only such boundaries are involved in the process of conduction. Commercial varistors are characterized by a microstructure with a large amount of electrically inactive areas which include zinc-antimony spinel, bismuth oxide, and pores. Studies on elimination of inactive grain boundaries, which are the intergranular areas rich in reaction products of varistor components and pores, lead to an improvement in the microstructure, thereby improving the electrical properties of the varistor. The results were evaluated using statistical methods, defining the percentage of active grain boundaries in the varistor. Statistical analysis showed that the best results were obtained for a bismuth oxide varistor doped with antimony oxide, containing nearly 100 % conductive grain boundaries in its body.</p>
			</abstract>

Oxide varistors are made of inhomogeneous material whose properties are determined by active grain boundaries. It is essential that in the microstructure of a varistor only active grain boundaries are present as only such boundaries are involved in the process of conduction. Commercial varistors are characterized by a microstructure with a large amount of electrically inactive areas which include zinc-antimony spinel, bismuth oxide, and pores. Studies on elimination of inactive grain boundaries, which are the intergranular areas rich in reaction products of varistor components and pores, lead to an improvement in the microstructure, thereby improving the electrical properties of the varistor. The results were evaluated using statistical methods, defining the percentage of active grain boundaries in the varistor. Statistical analysis showed that the best results were obtained for a bismuth oxide varistor doped with antimony oxide, containing nearly 100 % conductive grain boundaries in its body.

Statistical evaluation of grain boundaries of varistors with modified bismuth oxide

Materials Science-Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Oxide varistors are made of inhomogeneous material whose properties are determined by active grain boundaries. It is essential that in the microstructure of a...

Statistical evaluation of grain boundaries of varistors with modified bismuth oxide

Publié en ligne: 18 mai 2018

Pages: 145 - 150

Reçu: 11 août 2017

Accepté: 18 janv. 2018

DOI: https://doi.org/10.1515/msp-2018-0005

Mots clés
ZnO varistors, modified microstructure, nonlinear properties, semiconductor materials

© 2018

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Statistical evaluation of grain boundaries of varistors with modified bismuth oxide

Publié en ligne: 18 mai 2018

Pages: 145 - 150

Reçu: 11 août 2017

Accepté: 18 janv. 2018

DOI: https://doi.org/10.1515/msp-2018-0005

Mots clésZnO varistors, modified microstructure, nonlinear properties, semiconductor materials

© 2018

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Mots clés
ZnO varistors, modified microstructure, nonlinear properties, semiconductor materials