Enhanced electrical properties and good thermal stability in K0.48Na0.52NbO3–LiNbO3–BiAlO3 lead-free piezoceramics

Effect of Synthesis and Sintering Temperatures on K0.5Na0.5NbO3 Lead-Free Piezoelectric Ceramics By Microwave Heating

“…As indicated in Table 1, the microwave sintered samples show a lower piezoelectric constant d33 compared with conventionally sintered samples (d33 ~ 126 pC/N), which are very similar to those reported by other authors [35,36]. The piezoelectric constant, like the values of the ferroelectric and dielectric properties, is affected by the defects caused by the heterogeneity of microwave sintering.…”

Progress on the doping and phase boundary design of potassium–sodium niobate lead-free ceramics

“…can also be used to generate new KNN-based ceramic solutions and shifted the T OÀT downward to room temperature. The addition of BiAlO 3 , LiNbO 3 can decrease T OÀT 23 Through the phase diagram of KNNÀxLNÀBA ceramics, Fig. 3, a change in structure of this system can be observed as LiNbO 3 contents increase.…”

“…15 Some methods have been proposed and examined, such as ion substitutions, 16,17 sintering aids, [18][19][20] preparation methods 21,22 and construction of the phase boundary near room temperature, [23][24][25][26] to solve these problems and obtain dense and well-sintered KNN ceramics with excellent piezoelectric properties.…”

Piezoelectric properties of mechanochemically processed 0.67BiFeO3-0.33BaTiO3 ceramics

“…The constant efforts to develop environmentally friendly solutions and the pressure from the European RoHS directive to limit and ultimately ban lead-based piezoceramics [1], have significantly increased the attention of scientists and industries on lead-free alternatives for piezoelectric ceramics. Niobium-and bismuth-based lead-free piezoelectric systems have shown encouraging results [2][3][4][5][6][7][8]. Yet, the large-scale production of these materials is still hampered by several factors, such as cost and processing challenges [9].…”