[1] CAI Z M, FENG P Z, ZHU C Q et al. Dielectric breakdown behavior of ferroelectric ceramics: the role of pores. J. Eur. Ceram. Soc., 2533(2021).

[2] PAN H, LI F, LIU Y et al. Ultrahigh-energy density leadfree dielectric films via polymorphic nanodomain design. Science, 578(2019).

[3] CHEN K B, ZHOU X D, GAO M. Research progress and application of high power microwave technology. Winged Missile Journal, 1(2019).

[4] CHAI Y Y. Research of the Ku band compact high-power microwave output window, 1-4(2016).

[5] ZHANG X, WANG T, YU Q Q et al. Research progress of high-power waveguide window. High Power Laser and Particle Beams, 023001(2021).

[6] LI Q, CHEN L, GADINSKI M R et al. Flexible high-temperature dielectric materials from polymer nanocomposites. Nature, 576(2015).

[7] KHANCHAITIT P, HAN K, GADINSKI M R et al. Ferroelectric polymer networks with high energy density and improved discharged efficiency for dielectric energy storage. Nat. Commun., 2845(2013).

[8] HUANG Y, CHEN Y, LI X et al. Enhanced dielectric breakdown strength in Ni2O3 modified Al2O3-SiO2-TiO2 based dielectric ceramics. J. Eur. Ceram. Soc., 3861(2018).

[9] LIU M, CAO M, ZENG F et al. Fine-grained silica-coated barium strontium titanate ceramics with high energy storage. Ceram. Inter., 20239(2018).

[10] PING W W, LIU W F, LI S T. Enhanced energy storage property in glass-added Ba(Zr0.2Ti0.8)O3-0.15(Ba0.7Ca0.3)TiO3 ceramics and the charge relaxation. Ceram. Inter., 11388(2019).

[11] ZHANG J, WANG J, GAO D et al. Enhanced energy storage performances of CaTiO3-based ceramic through A-site Sm3+ doping and A-site vacancy. J. Eur. Ceram. Soc., 352(2021).

[12] YANG L, KONG X, LI F et al. Perovskite lead-free dielectrics for energy storage applications. Prog. Mater. Sci., 72(2019).

[13] ROESSLER D M, WALKER W C. Electronic spectrum and ultraviolet optical properties of crystalline MgO. Phys. Rev., 733(1967).

[14] BEAUCHAMP E K. Effect of microstructure on pulse electrical strength of MgO. J. Amer. Ceram. Soc., 484(1971).

[15] GÓMEZ-RODRÍGUEZ C, GARCÍA-QUIÑONEZ L V, AGUILAR-MARTÍNEZ J A et al. MgO-ZrO2 ceramic composites for silicomanganese production. Materials, 2421(2022).

[16] ŚNIEŻEK E, SZCZERBAA J, STOCH P et al. Structural properties of MgO-ZrO2 ceramics obtained by conventional sintering, arc melting and field assisted sintering technique. Mater. Desi., 412(2016).

[17] WANG X, LIANG P, CHAO X et al. Dielectric properties and impedance spectroscopy of MnCO3-modified (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 lead-free ceramics. J. Am. Ceram. Soc., 1506(2015).

[18] CEN Z, DONG Z, XU Z et al. Improving fatigue properties, temperature stability and piezoelectric properties of KNN-based ceramics via sintering in reducing atmosphere. J. Eur. Ceram. Soc., 4462(2021).

[19] WANG T, LI Z. Effects of MnO2 addition on the structure and electrical properties of PIN-PZN-PT ceramics with MPB composition. J. Mater. Sci.: Mater. Elect., 22740(2020).

[20] HUANG Q Z, LU G M, SUN Z et al. Effect of TiO2 on sintering and grain growth kinetics of MgO from MgCl2·6H2O. Mater. Trans. B, 344(2013).

[21] COOPER M W D, STANEK C R, ANDERSSON D A. The role of dopant charge state on defect chemistry and grain growth of doped UO2. Act. Mater., 403(2018).

[22] FENG Y, WU J, CHI Q et al. Defects and aliovalent doping engineering in electroceramics. Chem. Rev., 1710(2020).

[23] ZHANG C, CHEN Y, LI X et al. Effect of LiF addition on sintering behavior and dielectric breakdown mechanism of MgO- based microwave dielectric ceramics. J. Mater., 478(2021).

[24] TAN Z, LIN H, SONG K et al. Effects of TiO2 additive on ultra-low-loss MgO-LiF microwave dielectric ceramics. Ceram. Inter., 5753(2022).

[25] XIONG Z, TANG B, ZHANG X et al. Suppression of Ti3+ generation in Ba3.75Nd9.5Ti17.5M0.5O54 (M = Cu, Cr, Al, Mn) ceramics. Ceram. Inter., 19058(2018).