Textured PMN–PT and PMN–PZT

Abstract

A promising way to improve the performance of piezoelectric ceramics is grain orientation by templated grain growth. In this work lead‐based piezoelectric ceramics Pb(Mg1/3Nb2/3)0.68Ti0.32O3 (PMN–32PT) and Pb(Mg1/3Nb2/3)0.42(Ti0.638Zr0.362)0.58O3 (PMN–37PT–21PZ) ceramics were textured via templated grain growth process. For texturization (001)‐oriented BaTiO3 (BT) platelets (approximately 10 μm × 10 μm × 2 μm) were utilized as templates. The texturized ceramics were accomplished by aligning the templates by tape casting. The template growth into the matrix resulted in textured ceramics with Lotgering factors between 0.94 and 0.99 for both compositions. Consequences of the texture are enhanced dielectric and piezoelectric properties. Unipolar strain‐field measurements of textured ceramics showed 0.25% strain s33 at 3 kV/mm. Large signal d33* of up to 878 pm/V were determined directly from strain measurements. Compared with randomly oriented ceramics in texturized samples unipolar strain s33 and large signal d33* was enhanced by a factor of up to 1.8.

Textured lead titanate ceramics fabricated by slip casting under a high magnetic field

“…It is not clear why (002) and (200) peaks are stronger than (001) and (100) peaks, but the phenomena like this have been observed in other works about oriented perovskite ceramics. 22) The SEM images of the surface of the sintered sample are shown in Fig. 7.…”

Templated Grain Growth of <001> Textured PMN‐28PT Using SrTiO3 Templates

“…Textured PMN-PT obtained by this process shows better piezoelectric properties than random ceramic PMN-PT, and can approach Bridgman single crystal performance. [6][7][8][9][10][11] The TGG process allows for the development of crystallographic texture in polycrystalline ceramics by growth of template particles aligned during tape casting. Template growth is driven by the difference in the surface free energy between the matrix grains and the larger template crystal during heat treatment.…”

Piezoelectric properties and temperature stability of Mn-doped Pb(Mg1/3Nb2/3)-PbZrO3-PbTiO3 textured ceramics

“…Several other studies have reported that T C of textured PMN-PT ceramics is decreased due to the existence of heterogeneous templates (such as BaTiO 3 , SrTiO 3 ). 9,14 In case of SrTiO 3 textured PMN-PT, the depolarization temperature was unacceptably low ($60 C). 9 In contrast, the T C of T-5BT textured ceramics was still high on the order of 198 C. However, we found that T-5BT ceramic has problem related to temperature stability of piezoelectric properties.…”