In the present work, the Li2ZnTi3O8 ceramics were prepared via the solid-state reaction method, afterward annealed at 800 °C in a time variation from 4 to 20 h. The ordering, microstructures and dielectric properties were investigated using x-ray diffraction, scanning electron microscopy, network analyzer, and Raman spectroscopy. The most significant enhancement of quality factor is obtained in the sample annealed for 20 h, while the dielectric constant and temperature coefficient of resonant frequency change slightly. This result mainly attributes to the enhancement of ordering, which could be related to the increase in the Zn–O bond strength in ZnO4 tetrahedra. Meanwhile, the full-width at half-maximum of A1g mode decreased with higher annealing time, which suggested less variation in the Zn–O bond length and a higher degree of ordering. The best combination of microwave dielectric characteristic is obtained in the sample annealed at 800 °C for 20 h: Q × f = 112,400 GHz, εr = 24.500, and τf = −11 ppm/°C.
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M.T. Sebastian: Dielectric Materials for Wireless Communications (Elseiver, Oxford, U. K, 2008); pp. 2, 3.
Y-C. Chen, K-C. Chang, and D-Y. Tsai: A hybrid dielectric resonator antenna based upon novel complex perovskite microwave ceramic. Ceram. Int. 39, 8043–8048 (2013).
H. Tamura, T. Konoike, Y. Sakabe, and K. Wakino: Improved high-Q dielectric resonator with complex perovskite structure. J. Am. Ceram. Soc. 67, c59–c61 (1984).
G. Chen, M. Hou, Y. Bao, C. Yuan, C. Zhou, and H. Xu: Silver co-firable Li2ZnTi3O8 microwave dielectric ceramics with LZB glass additive and TiO2 dopant. Int. J. Appl. Ceram. Technol. 10, 1–10 (2013).
B. Tang, H. Li, P. Fan, S. Yu, and S. Zhang: The effect of Mg: Ti ratio on the phase composition and microwave dielectric properties of MgTiO3 ceramics prepared by one synthetic process. J. Mater. Sci. 25, 2482–2486 (2014).
D. Pamu, G. Lakshmi Narayana Rao, and K-C. James Raju: Enhanced microwave dielectric properties of (Zr0.8,Sn0.2)TiO4 ceramics with the addition of its own nanoparticles. J. Am. Ceram. Soc. 95, 126–132 (2012).
S. Kawashima, M. Nishida, I. Ueda, and H. Ouchi: Ba(Zn1/3Ta2/3)O3 ceramics with low dielectric loss at microwave frequencies. J. Am. Ceram. Soc. 66, 421–423 (1983).
H. Kawai, M. Tabuchi, M. Nagata, H. Tukamoto, and A.R. West: Crystal chemistry and physical properties of complex lithium spinels Li2MM’3O8 (M=Mg, Co, Ni, Zn; M’=Ti, Ge). J. Mater. Chem. 8, 1273–1280 (1998).
H. Taghipour Armaki, E. Taheri-Nassaj, and M. Bari: Phase analysis and improvement of quality factor of Li2ZnTi3O8 ceramics by annealing treatment. J. Alloys Compd. 581, 757–761 (2013).
S. George and M.T. Sebastian: Synthesis and microwave dielectric properties of novel temperature stable high Q, Li2ATi3O8 (A=Mg, Zn) ceramics. J. Am. Ceram. Soc. 93, 2164–2166 (2010).
S. George and M.T. Sebastian: Low-temperature sintering and microwave dielectric properties of Li2ATi3O8 (A=Mg, Zn) Ceramics. Int. J. Appl. Ceram. Technol. 8, 1400–1407 (2011).
V.S. Hernandez and L.M. Torres Martinez: Stoichiometry, structures and polymorphism of spinel-like phases, Lil.33xZn2−2xTil+0.67xO4. J. Mater. Chem. 6, 1533–1536 (1996).
S. Kume, M. Yasuoka, N. Omura, and K. Watari: Effects of annealing on dielectric loss and microstructure of aluminum nitride ceramics. J. Am. Ceram. Soc. 88, 3229–3231 (2005).
S. Kume, M. Yasuoka, N. Omura, and K. Watari: Effects of annealing on dielectric loss and microstructure of aluminum nitride ceramics. J. Eur. Ceram. Soc. 26, 1831–1834 (2006).
S. Bindra Narang and S. Bahel: Low loss dielectric ceramics for microwave applications: A review. J. Ceram. Process. Res. 11, 316–321 (2010).
C-L. Huang, C-H. Su, C-M. Chang, and E. Leite: High Q microwave dielectric ceramics in the Li2(Zn1−xAx)Ti3O8 (A = Mg, Co; x = 0.02–0.1) system. J. Am. Ceram. Soc. 94, 4146–4149 (2011).
T. Santhosh Kumar, D. Goswami, and D. Pamu: Effects of CeO2 nanoparticles and annealing temperature on the microwave dielectric properties of MgTiO3 ceramics. Ceram. Int. 40, 1125–1131 (2013).
I-T Kim and Y-H. Kim: Ordering and microwave dielectric properties of Ba(Ni1/3Nb2/3)O3 ceramics. J. Mater. Res. 12, 518–525 (1997).
M. Bieringer, S.M. Moussa, L.D. Noailles, A. Burrows, and C.J. Kiely: Cation ordering, domain growth, and zinc loss in the microwave dielectric oxide Ba3ZnTa2O9-δ. J. Am. Ceram. Soc. 15, 586–597 (2003).
J. Deng, X. Xing, J. Chen, R. Yu, and G. Liu: Cation ordering in the microwave dielectric ceramic BaCd1/3Nb2/3O3. Scr. Mater. 56 (1), 65–68 (2007).
C-T. Lee, Y-C. Lin, C-Y. Huang, C-Y. Su, and C-L. Hu: Cation ordering and dielectric characteristics in barium zinc niobate. J. Am. Ceram. Soc. 90, 483–489 (2007).
D. Houivet, B. Lamagnere, J. El Fallah, and J-M. Haussonne: Effect of annealing on the microwave properties of (Zr,Sn)TiO4 ceramics. J. Eur. Ceram. Soc. 21, 1727–1730 (2001).
D. Rout, G.S. Babu, V. Subramanian, and V. Sivasubramanian: Study of cation ordering in Ba(Yb1/2Ta1/2)O3 by X-ray diffraction and raman spectroscopy. Int. J. Appl. Ceram. Technol. 5, 522–528 (2008).
S-K. Singh, S-R. Kiran, and V.R.K. Murthy: Structural, Raman spectroscopic and microwave dielectric studies on spinel Li2Zn(1−x)NixTi3O8 compounds. Mater. Chem. Phys. 141, 822–827 (2013).
R. Yang, H. Liu, Y. Wang, W. Jiang, X. Hao, J. Zhan, and S. Liu: Structure and properties of ZnO-containing lithium–iron–phosphate glasses. J. Alloys Compd. 513, 97–100 (2012).
C-M. Julien and M. Massot: Lattice vibrations of materials for lithium rechargeable batteries I. Lithium manganese oxide spinel. Mater. Sci. Eng., B 97, 217–230 (2003).
R. Freer and F. Azough: Microstructural engineering of microwave dielectric ceramics. J. Eur. Ceram. Soc. 28, 1433–1441 (2008).
S-J. Penn, N-M. Alford, A. Templeton, X. Wang, M. Xu, M. Reece, and K. Schrapel: Effect of porosity and grain size on the microwave dielectric properties of sintered alumina. J. Am. Ceram. Soc. 80, 1885–1888 (1997).
I-A. Leonidov, O-N. Leonidova, R-F. Samigullina, and M-V. Patrakeev: Structural aspects of lithium transfer in solid electrolytes Li2x Zn2−3xTi1+xO4 (0.33≤ x≤ 0.67). J. Struct. Chem. 45, 262–268 (2004).
P-P. Ma, L. Yi, X-Q. Liu, L. Li, and X-M. Chen: Effects of postdensification annealing upon microstructures and microwave dielectric characteristics in Ba((Co0.6−x/2Zn0.4−x/2Mgx)1/3Nb2/3)O3 ceramics. J. Am. Ceram. Soc. 96 (6), 1795–1800 (2013).
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Taghipour-Armaki, H., Taheri-Nassaj, E. & Bari, M. Effect of annealing time on structural and microwave dielectric characteristics of Li2ZnTi3O8 ceramics. Journal of Materials Research 30, 1619–1628 (2015). https://doi.org/10.1557/jmr.2015.107