A Novel Magnetodielectric Solid Solution Ceramic 0.4LiFe(5)O(8)-0.6Li(2)MgTi(3)O(8) with Excellent Microwave Dielectric Properties

作者：He Li; Zhou Di; Xiang Feng; Chang Panpan; Li Yong; Wang Hong^*

来源：Journal of the American Ceramic Society, 2013, 96(10): 3027-3030.

DOI：10.1111/jace.12565

In this study, a novel spinel solid solution ceramic of 0.4LiFe(5)O(8)-0.6Li(2)MgTi(3)O(8) (0.4LFO-0.6LMT) has been developed and investigated. It is found that the 40mol% LiFe5O8 and 60mol% Li2MgTi3O8 are fully soluble in each other and a disordered spinel phase is formed. The ceramic sample sintered at 1050 degrees C/2h exhibits both good magnetic and dielectric properties in the frequency range 1-10MHz, with a permeability between 29.914.1 and magnetic loss tangent between 0.120.67, permittivity between 16.9216.94 and dielectric loss tangent between 5.9x10(-3)-2.3x10(-2). The sample also has good microwave dielectric properties with a relative permittivity of 16.1, a high quality factor (Qxf) 28500GHz (at 7.8GHz). Furthermore, 3wt% H3BO3-CuO (BCu) addition can effectively lower the sintering temperature to 925 degrees C and does not degrade the magnetodielectric properties. The chemical compatibility with silver electrode indicates that this kind of ceramics is a good candidate for the low-temperature cofired ceramic (LTCC) application.

• 出版日期2013-10
• 单位西安交通大学