Microstructure and Varistor Properties of ZPCCAE Ceramics with Erbium
| Autor: | Jae-Seok Heo, Choon-Woo Nahm, Geun-Hyung Lee |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Materials science
Doping Metallurgy chemistry.chemical_element Varistor Intergranular corrosion Microstructure Grain size Electronic Optical and Magnetic Materials Erbium chemistry visual_art Phase (matter) visual_art.visual_art_medium Ceramic Electrical and Electronic Engineering Composite material |
| Zdroj: | Transactions on Electrical and Electronic Materials. 15:213-216 |
| ISSN: | 1229-7607 |
| Popis: | The microstructure and varistor properties of ZPCCAE () ceramics were investigated with different erbium amounts. Analysis of the microstructure indicated that the ceramics consisted of ZnO grains as a bulk phase, and intergranular layers (mixture of and ) as a minor secondary phase. With the increase of the doped erbium amount, the densities of sintered pellets increased from 5.63 to , and the average grain size decreased from 9.0 to . The increase of the doped erbium amount increased the breakdown field from 2,649 to 5,074 V/cm, and the nonlinear coefficient from 27.6 to 39.1. It was found that in the range of 0.25 to 0.5 mol%, the doped erbium had little effect on the microstructure and electrical properties. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|