Effects of CaTiO₃on Electrical Properties in LiTaO₃Ceramics

Improved Piezoelectric Properties of LiTaO3 Family Solid Solution Ceramics with Modified Composition

“…Our study has particularly allowed the identification of a promising system of the type Li 1À Ca Ta 1À Ti O 3 (0 0:15) that exhibits excellent piezoelectric properties. 1,5) The doping of CaTiO 3 not only promoted the sintering of LiTaO 3 , but also reduced T C at an approximate rate of 16 C/mol % up to 15 mol % of CaTiO 3 in LiTaO 3 solid solution; the relative density and T C of Li 0:85 Ca 0:15 Ta 0:85 Ti 0:15 O 3 ( ¼ 0:15) were 97% and 450 C, respectively.…”

“…Recently, different stoichiometric and nonstoichiometric LiTaO 3 solid solutions have been studied to lower Curie temperature, [1][2][3][4][5] which facilitate the poling of the corresponding samples and then allow the evaluation of the piezoelectric activity of the selected compounds. Our study has particularly allowed the identification of a promising system of the type Li 1À Ca Ta 1À Ti O 3 (0 0:15) that exhibits excellent piezoelectric properties.…”

Sintering mechanism and dielectric properties of LiTaO3 matrix composites with the addition of Al2O3 particles

“…LiTaO 3 is difficult to be sintered because of volatilization of Li 2 O at high temperature (>1300 8C). In previous studies, multifarious solid solution systems were proposed, such as (1 À x)LiTaO 3 -xCaTiO 3 [3], Mg-doped LiTaO 3 [4] and Li (1Àx) Ag x TaO 3 [5]. Densification of LiTaO 3 can be improved by addition of oxide or fluoride, but the relative densities of the sintered composites were still very low [6][7][8][9].…”

“…Many studies were concentrated on the growth and properties of LiTaO 3 single crystal, but the sintering behavior, microstructure, and properties of LiTaO 3 ceramic matrix composites were rarely reported [3]. LiTaO 3 is difficult to be sintered because of volatilization of Li 2 O at high temperature (>1300 8C).…”

Sinterability and Dielectric Properties of LiTaO3-Based Ceramics with Addition of CoO

“…Previous studies have tried to facilitate the sintering of the LiTaO 3 ceramics by adding oxides/fluorides or by doping with two steps of powder synthesis first, followed by sintering [14,15]. Meanwhile, there have been many studies on LiTaO 3 solid solution systems such as Mg, CaTiO 3 , Ag, Cu-doped and LiF, MgF 2 co-doped LiTaO 3 systems [16][17][18][19][20]. Nowadays, lead zirconate titanate (PZT) is the most widely-used piezoelectric ceramic, but the production and use of lead-containing materials will produce serious lead volatilization, which is not conducive to environmental protection, and the toxicity of lead oxide is very large.…”