Pure phase Y_(3)Fe_(5)O_(12)(YIG)ceramic was successfully produced by tape-casting forming process and one-step solid-state sintering method.The activation energy for densification was calculated to be 183.81 kJ/mol.P...Pure phase Y_(3)Fe_(5)O_(12)(YIG)ceramic was successfully produced by tape-casting forming process and one-step solid-state sintering method.The activation energy for densification was calculated to be 183.81 kJ/mol.Pure YIG ceramic with a relative density as high as 99.8%was fabricated.The existence of O vacancy and Fe^(2+)ions was determined by XPS and EPR spectra.The RT saturation magnetization was measured to be 28.2 emu/g,and the hysteresis loss was calculated to be smaller than 10 mJ/kg in the temperature range of 230~360 K and be as high as 238.8 mJ/kg at 30 K.The dielectric loss tangent tanδ_(ε)was nearly zero at 6~7 GHz and 11~12 GHz.For complex permeability in the frequency range of 5~18 GHz,the magnetic loss tangent tanδ_(μ)fluctuated at around zero.Therefore,the low values of tanδ_(ε)and tanδ_(μ)indicate that it is a low loss ceramic material.展开更多
基金the National Key R&D Program of China(2017YFB0403200)the National Natural Science Foundation of China(No.51872327)。
文摘Pure phase Y_(3)Fe_(5)O_(12)(YIG)ceramic was successfully produced by tape-casting forming process and one-step solid-state sintering method.The activation energy for densification was calculated to be 183.81 kJ/mol.Pure YIG ceramic with a relative density as high as 99.8%was fabricated.The existence of O vacancy and Fe^(2+)ions was determined by XPS and EPR spectra.The RT saturation magnetization was measured to be 28.2 emu/g,and the hysteresis loss was calculated to be smaller than 10 mJ/kg in the temperature range of 230~360 K and be as high as 238.8 mJ/kg at 30 K.The dielectric loss tangent tanδ_(ε)was nearly zero at 6~7 GHz and 11~12 GHz.For complex permeability in the frequency range of 5~18 GHz,the magnetic loss tangent tanδ_(μ)fluctuated at around zero.Therefore,the low values of tanδ_(ε)and tanδ_(μ)indicate that it is a low loss ceramic material.
