Enhanced transmittance and piezoelectricity of transparent K_0.5Na_0.5NbO₃ ceramics with Ca(Zn_1/3Nb_2/3)O₃ additives

Abstract

Highly transparent lead-free (1 − x)K0.5Na0.5NbO3–xCa(Zn1/3Nb2/3)O3 (abbreviated as KNN–xCZN) piezoceramics were synthesized by a solid state reaction method.

Lead‐free (K,Na)NbO3‐based ceramics with high optical transparency and large energy storage ability

“…The magnitude of the optical band gap energy E g is associated with optical transmittance (Figure ). In general, in the same system, the larger the E g value, the higher the transparency, which was discussed in our previous work …”

“…The intermediate steps, including milling, granulating, and pressing into a plate‐shape were also performed in the same manner as previously outlined . The optical transmittance, crystal structure, detailed microstructure, dielectric property and ferroelectric performance were characterized in the same manner as reported previously …”

“…Therefore, persistent efforts should be made to add compounds to the materials (as in Tables and ). Moreover, in our previous work, the highly transparent lead‐free (1− x )(K 0.5 Na 0.5 )NbO 3 – x Sr(Mg 1/3 Nb 2/3 )O 3 (KNN–SMN) and (1‐ x )K 0.5 Na 0.5 NbO 3 – x Sr(Zn 1/3 Nb 2/3 )O 3 (KNN–CZN) ceramics were successfully synthesized . The values of the optical transmittance are listed in Table .…”

“…However, almost all the KNN‐based ferroelectric ceramics examined in previous studies do not satisfy the requirement of both high optical transmittance and high energy storage density. Tables and show the visible optical transparency and energy storage density of most KNN‐based ceramics studied during the 2014‐2017 time period . It was found that transparent ferroelectric ceramics with high energy storage densities have rarely been created in previous studies.…”

Ho3+‐doped (K, Na)NbO3‐based multifunctional transparent ceramics with superior optical temperature sensing performance

“…(K 0.5 Na 0.5 )NbO 3 (KNN) ceramics are one kind of promising lead‐free ferroelectric ceramics containing good dielectric, piezoelectric and ferroelectric ceramics . KNN‐based transparent ceramics, including 0.8(K 0.5 Na 0.5 )NbO 3 –0.2Sr(Sc 0.5 Nb 0.5 )O 3 , (1‐ x )(K 0.5 Na 0.5 )NbO 3 –xLaBiO 3 (0.005 ≤ x ≤ 0.06), (1‐ x )(K 0.5 Na 0.5 )NbO 3 –xBi(Mg 2/3 Nb 1/3 )O 3 (0.05 ≤ x ≤ 0.15), (K 0.5 Na 0.5 ) 0.9 Li 0.1 Nb 0.9 Bi 0.1 O 3 , (1‐ x )(K 0.5 Na 0.5 )NbO 3 –xCa(Zn 1/3 Nb 2/3 )O 3 (0.03 ≤ x ≤ 0.1) and 0.91(K 0.37 Na 0.63 )NbO 3 –0.09Ca(Sc 0.5 Nb 0.5 )O 3 , exhibit high transparency and good electrical performance.…”