Low temperature co-fired Co_2Z barium-strontium ferrite materials with BBSC glass

摘要

In this paper, we prepared Co_2Z barium-strontium ferrite material (Ba_(1.5)Sr_(1.5)Co_2Fe_(24)O_(41)) with BBSC (Bi_2O_3-B_2O_3-SiO_2-CuO) glass by traditional solid state method. Using BBSC glass, the barium-strontium ferrite materials were successful synthesized in low temperature (920 ℃). The effects of BBSC upon microstructure and magnetic properties of materials were systematically investigated. BBSC glass promoted the single phase formation of Co_2Z ferrite and enhanced the densification of samples. With BBSC glass increased from 1 to 4 wt%, saturation magnetization (M_S) increased gradually from 36.5 to 50.3 emu/g, coercivity (H_C) decreased first and then increased, and magnetic permeability (μ') increased first and then decreased. The materials with 3 wt% glass possessed excellent performances, including M_S = 49.6 emu/g, H_C = 164 Oe, μ' = 7, and tan δ_μ was about 0.03.