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- Title
Enhanced grain-boundary diffusion on power loss of low-temperature-fired NiCuZn ferrites for high-frequency power supplies.
- Authors
Yang, Yan; Zhang, Huaiwu; Li, Jie; Gan, Gongwen; Wang, Gang; Wen, Dandan
- Abstract
NiCuZn ferrite ceramics with high permeability, low power loss and excellent thermal stability are vital materials for high-frequency power devices. This paper analyzed grains growth and grain-boundary diffusion of Ni0.2Cu0.2Zn0.6Fe2O4 ferrite ceramics at lower temperatures by adding optimized additives. X-ray diffraction reveals that the samples are pure spinel ferrite phase sintered at low temperatures. SEM images indicate that uniform and compact NiCuZn ferrite ceramics were obtained at 920 °C for 4 h, which is very advantageous for low-temperature co-fired ceramic (LTCC) technology. In addition, the ferrite ceramics with higher permeability (~ 411 @ 1 MHz), lower power loss in high frequency (~ 442 kW/m3 @ 7 MHz) and good thermal stability were synthesized by controlling grains growth and grain-boundary diffusion. The results indicate that this ferrite ceramic material is a good candidate for the application of miniaturized power electronics in high frequency.
- Subjects
THERMAL stability; THERMAL properties; CERAMICS; DIFFUSION; SEPARATION (Technology)
- Publication
Applied Physics A: Materials Science & Processing, 2018, Vol 124, Issue 11, p1
- ISSN
0947-8396
- Publication type
Article
- DOI
10.1007/s00339-018-2212-2