2014/10/04 by Hanna Kähäri, Merja Teirikangas, Jari Juuti +1 · 13 citations
Engineering · Materials Science · #Microwave Dielectric Ceramics Synthesis #Ferroelectric and Piezoelectric Materials #Dielectric properties of ceramics
paper · doi:10.1111/jace.13277
Lithium molybdate disks were fabricated by moistening water‐soluble Li 2 MoO 4 powder with deionized water and compressing it under a pressure of 130 MPa. Disks were postprocessed at room temperature, at 120°C, and at 540°C, which is a common sintering temperature for Li 2 MoO 4 . Regardless of the postprocessing temperature, densities as high as 87%–93% of the theoretical value were achieved. The X ‐ray diffraction patterns of processed disks were all the same with no signs of hydrates or constitutional water. The samples also exhibited very similar microstructures and microwave dielectric properties with a relative permittivity of 4.6–5.2 and a Q × f value of 10 200–18 500 at 9.6 GHz, depending on the postprocessing temperature.