Effect of Li₂O-Al₂O₃-Bi₂O₃-SiO₂ Glass on Electromagnetic Properties of Ni_0.16Cu_0.22Zn_0.62Fe₂O₄-BaTiO₃ Composites at Low Sintering Temperature

Abstract:

In the present work, the composite material Ni_0.16Cu_0.22Zn_0.62Fe₂O₄-BaTiO₃ (NCZF-BTO, in a 10:1) was synthesized with different additive amounts of Li₂O-Al₂O₃-Bi₂O₃-SiO₂ (LABS) glass using a traditional solid-state reaction method and sintered at 900 °C. The synthesized composites were then comparatively investigated; in addition to their phases and density, their magnetic and dielectric properties, which include the saturation magnetization(4πM_s), coercivity (H_c), permeability (μ^'), quality factor (Q), dielectric constant (ε')and dielectric loss (tan δ) were characterized. In contrast to the undoped composites, the performance of the LABS-doped samples were enhanced. The optimal performance was obtained when the LABS glass content reached 1.0wt%. At this level of doping, the bulk density increased from 4.883 g/cm³ to 5.021g/cm³, the saturation magnetization (4πM_s) increased from 3819.5 to 4113.6Gs, the coercivity (H_c) decreased from 111 to 106.5A/m, the permeability (μ^') at 10 MHz increased from 25.8 to 61.1, and the dielectric constant (ε') at 10 MHz increased from 18.9 to 23.4. On further increasing the LABS glass content to1.5 wt%, the performance of the composite generally deteriorated, except for the dielectric constant,which increased to 27.1. In short, the optimal LABS glass doping ratio was determined to be 1.0 wt%.

• Periodical: Materials Science Forum (Volume 960)
• Pages: 250-255
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.960.250
• Online since: June 2019
• Authors: Qiang Zhao*, Dainan Zhang, Jie Li
• Keywords: Composite, Electromagnetic, LABS Glass, Low-Temperature Sintering

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