Ultra-low temperature sintering and temperature stable microwave dielectrics of (Mg1-xZnx)V2O6 (x= 0-0.09) Ceramics

• Published in: Journal of Asian Ceramic Societies Vol. 9; no. 1; pp. 106 - 112
• Main Authors: Huang, Cheng-Liang, Huang, Jyun-Lin, Tsai, Meng-Hung
• Format: Journal Article
• Language: English
• Published: Taylor & Francis 02.01.2021; Taylor & Francis Group
• Subjects: (mg1-xznx)v2o6 ceramics; 1-x; ceramics; High-Q; Mg; microwave dielectric properties; ULTCC
• ISSN: 2187-0764
• DOI: 10.1080/21870764.2020.1848037

Novel ultra-low firing (Mg 1-x Zn x )V 2 O 6 (x = 0-0.09) ceramics have been investigated and systematically designed as promising dielectrics for ultra-low temperature co-fired ceramics applications. The X-ray diffraction patterns indicated that all samples crystallized in a monoclinic structure with a space group of C 2/m . Microstructures and lattice parameters are presented and correlated with the microwave dielectric properties of the ceramics. The MgV 2 O 6 specimen can be well-sintered at 610°C, the resulting ceramic of which featured an ε r ~ 8.8, a Q × f ~ 10,300 GHz and a τ f ~ - 29.7 ppm/°C. The tunable τ f value can be adjusted to near zero along with a great promotion in the Q × f of MgV 2 O 6 by using a small Zn substitution. In addition, excellent microwave dielectric properties (ε r ~ 9.3, Q × f ~ 15,300 GHz @15.5 GHz and τ f ~ - 3.4 ppm/°C) were obtained for the (Mg 0.93 Zn 0.07 ) V 2 O 6 specimen sintered at 610°C for 4 h. The specimen is chemically compatible with Al electrodes and could be an ideal ultra-low temperature co-fired ceramics dielectric. Possible applications include the 5 G system, particularly with high frequency regions.