Pb(Mg_1/3Nb_2/3)O₃–PbTiO₃ Textured Ceramics with High Piezoelectric Response by a Novel Templated Grain Growth Approach

Abstract

Pb(Mg1/3Nb2/3)O3–PbTiO3 is used as a model system of perovskite solid solutions with very high piezoelectric response at tailored morphotropic phase boundaries to demonstrate the processing of textured ceramics by ceramic‐only technology. A novel homogeneous templated grain growth approach that uses conventional ceramic procedures and a single‐source nanocrystalline powder for the matrix and also for obtaining the templates is described. Two batches of (100) faceted cube‐shaped microcrystals with average sizes of 27 and 10 μm were successfully used as templates, and aligned by tape casting for the processing of <001>‐textured Pb(Mg1/3Nb2/3)O3–PbTiO3 piezoelectric ceramics. Materials with effective piezoelectric coefficients up to 1000 pC/N and ferroelectric properties approaching those of single crystals are obtained.

Enhanced electromechanical properties and phase transition temperatures in [001] textured Pb(In1/2Nb1/2)O3-Pb(Mg1/3Nb2/3)O3-PbTiO3 ternary ceramics

“…Thus, these highly textured ceramics exhibit significantly enhanced high field d 33 * that approaches 1555 pC/ N. However, there is no clear effect of the texture fraction on the strain hysteresis H s . The optimized d 33 * value obtained in this work is higher than those previously reported for PMN-PT textured ceramics, [22][23][24]27 Table I, as previous studies have shown that the piezoelectric properties significantly increase with decreasing domain size below 1 lm. [30][31][32] It can also be seen that domains are bounded by grain boundaries.…”

“…21 Recently, several published reports have demonstrated that highly [001] textured PMN-PT binary ceramics exhibit substantially enhanced piezoelectric coefficient and high electromechanical coupling factor. [22][23][24][25][26][27][28] Thus, it is expected that [001] oriented PIN-PMN-PT ternary ceramics would exhibit high and much more stable electrical performance as compared to binary PMN-PT textured ceramics. However, texturing of PIN-PMN-PT compositions is a relatively challenging problem due to several fundamental constraints, including severe volatility of the lead oxide at the sintering temperatures (above 1200 C), the difficulty of preparing single-phase PIN-PMN-PT matrix with fine grain size (500 nm), and the instability of templates due to chemical reactivity with the ternary matrix, etc.…”

“…2(a)). Compared with textured PMN-PT, [22][23][24][25][26][27] ternary PIN-PMN-PT textured ceramics have remarkably improved phase transitional temperatures (20-70 C higher T r-t and T c ) and similar room temperature dielectric properties (Table I); hence, it offers tremendous potential for practical applications with much wider temperature usage range. Fig.…”

“…% BT textured PIN-PMN-PT ceramics are comparable to/superior to those previously reported in textured PMN-PT ceramics. [22][23][24][25][26][27] Here, the d 33 measured by using a quasi-static d 33 meter is dominated by intrinsic piezoelectric response.…”

Highly Textured BaTiO3 via Templated Grain Growth and Resulting Polarization Reversal Dynamics

“…As the prototype ferroelectric ceramic, Barium Titanate (BaTiO 3 ) has been studied extensively over the past seven decades, and efforts to develop high‐performance Pb‐free piezoelectrics have renewed interest in bulk textured ceramics . As expected from crystal symmetry and well established via work in other systems, property anisotropy and the values of specific properties of interest can be maximized by establishing a high degree of crystallographic texture in bulk materials. While a variety of techniques are available for developing this bulk texture, we selected Templated Grain Growth (TGG) as the most applicable to BaTiO 3 .…”