Abstract
In this work, spinel-structured MgAl2-x(Zn0.5Mn0.5)xO4 (0 ≤ x ≤ 0.08) single-phase ceramics were prepared through a solid-state reaction route. The substitution of (Zn0.5Mn0.5)3+ for Al3+ at the octahedral site affected the degree of inversion of A/B lattice sites, bond length/strength/valence, and covalency of metal-oxygen bond in the tetrahedron and hence microwave dielectric properties of MgAl2O4. The variation in εr and tanδ of ceramics is investigated in the millimeter wave-terahertz frequency band by combining infrared reflection spectrum and terahertz time-domain spectroscopy. A high Q×f value of 111,010 GHz @ 12.01 GHz, low εr = 8.3, and slightly lower τf = −60 ppm/°C is obtained for MgAl1.98Zn0.01Mn0.01O4 ceramics, which is tuned by adding a small amount of SrTiO3. The composite ceramics exhibited a near-zero τf (2.8 ppm/°C), high Q×f (55,400 GHz @ 11.15 GHz), and low εr (= 8.5), showing a great potential application prospect for 5G/6G wireless communication.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
