Details

Autor(en) / Beteiligte

• A. Sedky
• H. Mahfoz Kotb

Titel

Possible two non-linear regions in the IeV characteristics of ZnO varistors

Ist Teil von

• Current Applied Physics, 2013, 13(9), , pp.2117-2122

Ort / Verlag

한국물리학회

Erscheinungsjahr

2013

Link zum Volltext

Quelle

Elsevier ScienceDirect Journals Complete

Beschreibungen/Notizen

• We report here structural and IeV characteristics of ZnO varistor with Fe2O3 nanoparticles additions(≤200 nm). It was found that the addition of Fe does not influence the wurtzite structure of ZnO ceramics,while the average grain size was affected. Interestingly, the nonlinear regionwas clearly observedin the IeV characteristics of the samples with Fe = 2.5%, 5% and 10%. Whereas, two nonlinear regionswere only observed with further increase of Fe addition above 10% (30% and 50%). Although the values ofnon-linear coefficient are decreased by the additions of Fe, the breakdown field could be increased up to7900 V/cm. Furthermore, the electrical conductivity was improved by increasing Fe up to 10%, followedby a decrease with further increase of Fe up to 50%. These results were discussed in terms of Fe2O3nanosize grains which were formed and localized at the grain boundaries of ZnO ceramics. KCI Citation Count: 4