TY - JOUR
T1 - Effects of Zr-substitution on microstructure and properties of YCaVIG ferrites
AU - Huang, Yin Yin
AU - Yang, Jian
AU - Qiu, Tai
AU - Wang, Jia Qian
AU - Jin, Yu Long
PY - 2012/3
Y1 - 2012/3
N2 - Y 2.6-xCa 0.4xZr xV 0.2Fe 4.8-xO 12 (Zr x:YCaVIG) ferrite materials have been prepared by an oxide process. The phase formation and microstructure were analyzed by X-ray diffraction and scanning electron microscopy, respectively. The effects of Zr 4 substitution on phase compositions, sintering properties, microstructures and electromagnetic properties were investigated. The results indicate that all the sintered specimens with different Zr 4 contents show a single garnet structure. The addition of ZrO 2 can gradually increase the lattice constant, and lower the sintering temperature and the theoretical density. With the increase of Zr 4 content, the dielectric loss (tan δ ε) and coercivity (H c) decrease and then slightly increase, which is due to the variation of the microstructure. But the saturation magnetization (4πM s) shows the opposite variation compared to the former two properties. However, the dielectric constant (ε r) remains stable and remanence (B r) monotonically declines. Finally, the specimen of Y 2.3Ca 0.7Zr 0.3V 0.2Fe 4.5O 12 sintered at 1350° possesses the optimum electromagnetic properties: ε r=14.8, tan δ ε=1.35×10 -3, 4πM s=1638 Gs, B r=596 Gs, H c=0.75 Oe and ΔH (ferromagnetic resonance linewidth)=66 Oe.
AB - Y 2.6-xCa 0.4xZr xV 0.2Fe 4.8-xO 12 (Zr x:YCaVIG) ferrite materials have been prepared by an oxide process. The phase formation and microstructure were analyzed by X-ray diffraction and scanning electron microscopy, respectively. The effects of Zr 4 substitution on phase compositions, sintering properties, microstructures and electromagnetic properties were investigated. The results indicate that all the sintered specimens with different Zr 4 contents show a single garnet structure. The addition of ZrO 2 can gradually increase the lattice constant, and lower the sintering temperature and the theoretical density. With the increase of Zr 4 content, the dielectric loss (tan δ ε) and coercivity (H c) decrease and then slightly increase, which is due to the variation of the microstructure. But the saturation magnetization (4πM s) shows the opposite variation compared to the former two properties. However, the dielectric constant (ε r) remains stable and remanence (B r) monotonically declines. Finally, the specimen of Y 2.3Ca 0.7Zr 0.3V 0.2Fe 4.5O 12 sintered at 1350° possesses the optimum electromagnetic properties: ε r=14.8, tan δ ε=1.35×10 -3, 4πM s=1638 Gs, B r=596 Gs, H c=0.75 Oe and ΔH (ferromagnetic resonance linewidth)=66 Oe.
KW - Electromagnetic property
KW - Garnet ferrite
KW - Microstructure
KW - Zr-substitution
UR - http://www.scopus.com/inward/record.url?scp=84855418914&partnerID=8YFLogxK
U2 - 10.1016/j.jmmm.2011.09.010
DO - 10.1016/j.jmmm.2011.09.010
M3 - 文章
AN - SCOPUS:84855418914
SN - 0304-8853
VL - 324
SP - 934
EP - 938
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
IS - 6
ER -