For solving the contradiction that good optical properties and electrical properties of (K_0.5Na_0.5)NbO₃ (KNN)-based transparent ferroelectric ceramics cannot be achieved at the same time. The modification by doping and improved sintering techniques can not only increase the optical properties of ceramics but also improve and enhance the electrical properties of ceramics. (1 − x)(K_0.5Na_0.5)NbO₃–xBa(Bi_0.5Ta_0.5)O₃ (x = 0.01, 0.015, 0.02, 0.025, 0.03) lead-free transparent ferroelectric ceramics were synthesized by conventional solid-phase sintering method. The KNN ceramic was modified by Ba(Bi_0.5Ta_0.5)O₃ to obtain a large optical band gap energy, submicron grains, and a highly symmetric phase structure when x = 0.025, thus gaining highly transmittance of 67.2% in near-infrared region. The smaller grain size and dense microstructure give the ceramic with x = 0.025 a higher dielectric breakdown strength. Therefore, the excellent energy storage performance is achieved at high electric field of 200 kV/cm with energy storage density (W_rec) and energy storage efficiency (η) of 1.41 J/cm³ and 42%, respectively. The results show that (K_0.5Na_0.5)NbO₃–Ba(Bi_0.5Ta_0.5)O₃ ceramics are considered to be excellent candidates for the field of new transparent electronic devices.

_{为解决(K 0.5} Na _0.5 )NbO ₃ (KNN)基透明铁电陶瓷不能同时获得良好的光学性能和电学性能的矛盾。通过掺杂改性和改进的烧结技术，不仅可以提高陶瓷的光学性能，还可以改善和增强陶瓷的电性能。(1 -  x )(K _0.5 Na _0.5 )NbO ₃ - x Ba(Bi _0.5 Ta _0.5 )O ₃ ( x = 0.01, 0.015, 0.02, 0.025, 0.03) 采用常规固相烧结法合成无铅透明铁电陶瓷。通过Ba(Bi _0.5 Ta _0.5 )O _{3改性KNN陶瓷，在}x = 0.025时获得大的光学带隙能量、亚微米晶粒和高度对称的相结构 ，从而在近红外区域获得67.2%的高透射率. 较小的晶粒尺寸和致密的微观结构使x  = 0.025 的陶瓷具有更高的介电击穿强度。因此，在 200 kV/cm 的高电场下实现了优异的储能性能，具有储能密度（W _rec）和储能效率（η) 分别为 1.41 J/cm ³和 42%。结果表明，(K _0.5 Na _0.5 )NbO ₃ -Ba(Bi _0.5 Ta _0.5 )O ₃陶瓷被认为是新型透明电子器件领域的优秀候选材料。