Highly Transparent Eu-Doped 0.72PMN-0.28PT Ceramics with Excellent Piezoelectricity

Abstract

The 0.975[0.72Pb(Mg 1/3 Nb 2/3 )O 3 -0.28PbTiO 3 ]-0.025Eu 2 O 3 ceramics were prepared by a two-step sintering process including oxygen sintering and hot-pressing. An ultrahigh piezoelectric charge coefficient of 1400 pC/N and a superior optical transmittance up to 68% were simultaneously achieved. The underlying mechanism was discussed from a microstructural perspective, where the watermark domain configuration with a small domain size is responsible for the high optical transmission, while the large remanent polarization and dielectric constant and the introduced tetragonal phase with a parallel stripe domain structure are believed to synergistically contribute to the high piezoelectric coefficients. This work demonstrates that the rare-earth dopant in the PMN-PT ceramic system is conducive to enhanced transparency and piezoelectricity.

Sm-Doped PIN-PMN-PT Transparent Ceramics with High Curie Temperature, Good Piezoelectricity, and Excellent Electro-Optical Properties

“…This work has been highly praised by Nature and Science . , In 2021, we successfully fabricated PMN-PT ferroelectric ceramic with a high piezoelectric coefficient of 1400 pC/N and superior optical transmittance of 68%. This work proves that transparency and piezoelectricity can be enhanced by rare-earth dopants …”

“…All the samples exhibit transgranular fracture character without pores, indicating that all the samples have high density. It is generally confirmed that the samples with transgranular fracture character exhibit fewer pores and a higher intergranular bond strength compared with the intergranular fracture, favoring the decrease of the light scattering and thereby enhancing the transparency of ceramics. ,, …”

“…It is generally confirmed that the samples with transgranular fracture character exhibit fewer pores and a higher intergranular bond strength compared with the intergranular fracture, favoring the decrease of the light scattering and thereby enhancing the transparency of ceramics. 14,23,24 There are several absorption peaks observed in the optical transmittance spectra, which are approximately at the wavelengths of 932, 1084, 1244, 1382, and 1486 nm, attributed to the transitions of Sm 3+ from the ground state of 6 H 5/2 to the high energy levels of 6 F 11/2 , 6 F 9/2 , 6 F 7/2 , 6 F 5/2 , and 6 H 15/2 , respectively. 25,26 Sm 3+ ions are a crucial orange-red emission activator, and Sm 3+ -doped crystals and ceramics have been widely applied to optical data storage and display devices, stress transducing, etc.…”

“…Figure d exhibits a comparison of the optical transmittance, piezoelectric coefficient d 33 , and Curie temperature of the Sm-PIN-PMN-PT ceramics with other transparent piezoelectric ceramics. ,,− For details, please refer to Table S2. Compared with the properties of PIN-PMN-PT transparent ceramics reported by Fujii et al, the piezoelectric coefficient and optical transmission of PIN-PMN-PT transparent piezoelectric ceramics in this work are greatly improved by Sm-doping .…”

“…This work proves that transparency and piezoelectricity can be enhanced by rare-earth dopants. 14 Moreover, there is a mutual restriction between piezoelectric properties and Curie temperature. Though the above PMN-PT transparent ferroelectric crystals and ceramics exhibit excellent piezoelectric properties, their Curie temperatures are only around 100 °C.…”