Enhanced piezoelectric properties and thermal stability in Mo/Cr co-doped CaBi2Nb2O9 high-temperature piezoelectric ceramics

Dielectric, ferroelectric, and piezoelectric properties of Gd-modified CaBi2Nb2O9 high Curie temperature ceramics

“…Table 1 summarizes the piezoelectric constant d 33 and Curie temperature T c of unmodified and modified CBN ceramics with different fabrication methods [16][17][18][19][20][21][22][23][24][25][26][27][28][29]. For chemical doping, diatomic or triatomic doping at A-site of CBN is an effective approach to enhance the piezoelectric performance of CBN, and high piezoelectric d 33 values of 12-18 pC/N can be obtained, but with decreased T c due to large ionic radii of dopants [16][17][18][19][20][21][22][23][24][25][26][27][28][29]. B-site modification is also used to enhance the piezoelectric performance of CBN, and high piezoelectric d 33 of 10-15 pC/N can also be obtained by B-site modification while T c is almost unchanged.…”

Enhanced electrical properties in W/Cu co‐doped CaBi2Nb2O9 high‐temperature piezoelectric ceramics

“…A comparison of d 33 and ρ (@600℃) obtained in this study with those of reported CBN ceramics is presented in Figure 8B. 7,9,11,12,16,17,29,[36][37][38][39][40] Apparently, high piezoelectricity and high-temperature resistivity are simultaneously achieved in this study, showing that the material has advantages for potential high-temperature piezoelectric application.…”

Doping level effects in Nb self‐doped Bi3TiNbO9 high‐temperature piezoceramics with improved electrical properties

“…22 The V 6 mode (around 831 cm −1 ) may be owing to the symmetric vibrations of (Ti, Nb)-O bond. 29,30 No significant secondary vibration mode could be found after the Nb self-doping, which further elucidates the Nb 5+ has diffused into the crystal lattice successfully. The V 3 mode shifts to lower frequency with an increase in the Nb doping level, suggesting a variation of the (Ti, Nb)O 6 octahedron tilt angle as the Nb self-doping content increases.…”

“…The modes located at about 529 cm −1 (V 4 ) and 570 cm −1 (V 5 ) are assigned to the vibration of the top O atoms of (Ti, Nb)O 6 octahedron 22 . The V 6 mode (around 831 cm −1 ) may be owing to the symmetric vibrations of (Ti, Nb)‐O bond 29,30 . No significant secondary vibration mode could be found after the Nb self‐doping, which further elucidates the Nb 5+ has diffused into the crystal lattice successfully.…”