[1] [1] DONG X, SUN C L, YANG H Y, et al. Influence of Mg2SiO4 addition on crystal structure and microwave properties of Mg2Al4Si5O18 ceramic system[J]. J Mater Sci-Mater El, 2018, 29: 17967-17973.

[2] [2] REANEY I M, IDDLES D. Microwave dielectric ceramics for resonators and filters in mobile phone networks[J]. J Am Ceram Soc, 2006, 89(7): 2063-2072.

[3] [3] FEDERICI J, MOELLER L. Review of terahertz and subterahertz wireless communications[J]. J Appl Phys, 2010, 107(11): 6-23.

[4] [4] TAKASHI F, AKIRA A, YUKIO S, et al. Characterization of dielectric properties of oxide materials in frequency range from GHz to THz[J]. J Eur Ceram Soc, 2006, 26(10): 1857-1860.

[5] [5] KOLODIAZHNYI T, ANNINO G, SPREITZER M, et al. Development of Al2O3-TiO2 composite ceramics for high-power millimeter-wave applications[J]. Acta Mater, 2009, 57(11): 3402-3409.

[6] [6] ZHENG C W, WU S Y, CHEN X M, et al. Modification of MgAl2O4 microwave dielectric ceramics by Zn substitution[J]. J Am Ceram Soc, 2007, 90(5): 1483-1486.

[7] [7] LI L X, DING X, LIAO Q W. Structure and properties analysis for low-loss (Mg1-xCox)TiO3 microwave dielectric materials prepared by reaction-sintering method[J]. Ceram Int, 2012, 38(3): 1937-1941.

[8] [8] LAO X B, XU X Y, JIANG W H, et al. Effect of excess MgO on microstructure and thermal properties of cordierite ceramics for high temperature thermal storage[J]. Ceram Int, 2019, 45(17): 22264-22272.

[9] [9] SMAIL L, DJAIDA R, FOUDIL S, et al. Effect of temperature and magnesia on phase transformation kinetics in stoichiometric and non-stoichiometric cordierite ceramics prepared from kaolinite precursors[J]. J Therm Anal Calorim, 137: 11-23.

[10] [10] XIAO Z H, DONG X F, LI X Y, et al. Low temperature sintered cordierite ceramics from MgO-Al2O3-SiO2 glass powder[J]. Bioi Res Appl Chem, 2017, 7(6): 3004-3007.

[11] [11] TERADA M, KAWAMURA K, KAGOMIYA I, et al. Effect of Ni substitution on the microwave dielectric properties of cordierite[J]. J Eur Ceram Soc, 2007, 27(8): 3045-3048.

[15] [15] LI W, XU Z J, CHU R Q, et al. Synthesis and characterization of (Na0.85K0.15)0.5Bi0.5TiO3 ceramics by different methods[J]. Mater Res Bull, 2011, 46(6): 871-874.

[16] [16] LI W, XU Z J, CHU R Q, et al. Structure and electrical properties of BaTiO3 prepared by sol-gel process[J]. J Alloy Compd, 2009, 482(1/2): 137-140.

[17] [17] TABIT K, WAQIF M, SAADI L. Crystallization behavior and properties of cordierite synthesized by sol-gel technique and hydrothermal treatment. J Aust Ceram Soc, 2019, 55: 469-477.

[22] [22] HE S, GAO Y, ZHOU B, et al. Effect of nickel slag wastes on the properties of cordierite ceramics. Silicon, 2022, 14(4): 1331-1337.

[23] [23] LOU W C, MAO M M, SONG KX, et al. Low permittivity cordierite-based microwave dielectric ceramics for 5G/6G telecommunications. J Eur Ceram Soc, 2022, 42(6): 2820-2826.

[24] [24] SEBASTIAN M T, UBIC R , JANTUNEN H. Low-loss dielectric ceramic materials and their properties[J]. Int Mater Rev, 2015, 60(7): 392-412.

[25] [25] GUO Y, OHSATO H, K AKIMOTO K I. Characterization and dielectric behavior of willemite and TiO2-doped willemite ceramics at millimeter-wave frequency[J]. J Eur Ceram Soc, 2006, 26(10): 1827-1830.

[26] [26] SONG K X, WU S, L IU P, et al. Phase composition and microwave dielectric properties of SrTiO3 modified Mg2Al4Si5O18 cordierite ceramics[J]. J Alloys Compd, 2015, 628: 57-62.

[27] [27] GUO Y, OHSATO H, K AKIMOTO K I. Characterization and dielectric behavior of willemite and TiO2-doped willemite ceramics at millimeter-wave frequency[J]. J Eur Ceram Soc, 2006, 26(10/11): 1827-1830.

[28] [28] SAHEB N, ALGHANIM A. Low temperature synthesis of highly pure cordierite materials by spark plasma sintering nano-oxide powders[J]. Ceram Int, 2020, 46(15): 23910-23921.