Rare-earth-doped PbTiO3-PbZrO3 solid solutions

2009 ◽  
Vol 45 (3) ◽  
pp. 287-290
Author(s):  
S. K. Korchagina ◽  
L. F. Rybakova ◽  
O. L. Parkhomenko ◽  
N. V. Sadovskaya ◽  
A. A. Mikhailyuk
Keyword(s):  
Rare Earth ◽  
Solid Solutions ◽  
Rare Earth Doped

Synthesis and sintering of rare-earth-doped ceria powder by the oxalate coprecipitation method

1999 ◽  
Vol 14 (3) ◽  
pp. 957-967 ◽  
Author(s):  
Kenji Higashi ◽  
Kazutoshi Sonoda ◽  
Hiroshi Ono ◽  
Soichiro Sameshima ◽  
Yoshihiro Hirata
Keyword(s):  
Electron Microscopy ◽  
Rare Earth ◽  
Oxalic Acid ◽  
Solid Solutions ◽  
Nitrate Solution ◽  
Doped Ceria ◽  
Powder Preparation ◽  
Oxide Powders ◽  
Aspect Ratios ◽  
Rare Earth Doped

Doped ceria, which has a higher oxygen ion conductivity than yttria-stabilized zirconia, is one of the possible electrolytes for solid oxide fuel cell at low temperatures. This study concerns powder preparation and densification of rare-earth-doped ceria. Rare-earth-doped ceria powders with a composition of Ce0.8R0.2O1.9(R = Yb, Y, Gd, Sm, Nd, and La) were prepared by heating the oxalate coprecipitate when a mixed rare earth/cerium nitrate solution was added to an oxalic solution. The oxalate and derived-oxide powders were characterized by x-ray diffraction (XRD), thermogravimetry differential thermal analysis (TG-DTA), particle size analyzer with laser diffraction, inductively coupled plasma (ICP), transmission electron microscopy (TEM), and scanning electron microscopy (SEM). This method provided the oxalate solid solutions containing Ce and R, which were calcined to form the oxide solid solutions at 600 °C in air. The lattice parameter of oxide powders increased linearly with increasing ionic radius of doped rare earth. The size of platelike particles of oxalates and oxides depended on the concentration of oxalic acid and showed a minimum at 0.4 M oxalic acid. Dry milling of oxide powder with α–Al2O3ball was effective in reducing the size and aspect ratios of particles with little contamination of Al2O3. These rare-earth-doped ceria powders with various sizes were formed by uniaxial pressing (49 MPa) followed by cold isostatic pressing (294 MPa), and sintered at 900–1600 °C in air for 4 h. The micrometer-sized-doped CeO2 powders were densified above 95% of the theoretical density at 1200 °C. The grain size of rare-earth-doped ceria after sintering at 1600 °C was larger in the samples with the larger rare-earth element.

scholarly journals Review of Research on the Rare-Earth Doped Piezoelectric Materials

2021 ◽  
Vol 8 ◽  
Author(s):  
Yan Chen ◽  
Donglai Zhang ◽  
Zhong Peng ◽  
Maodan Yuan ◽  
Xuanrong Ji
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Single Crystals ◽  
Solid Solutions ◽  
Piezoelectric Materials ◽  
Photoluminescence Properties ◽  
Electronic Information ◽  
Potential Applications ◽  
Ultrasonic Devices ◽  
Rare Earth Doped

The piezoelectric materials, such as ceramics, crystals, and films, have wide applications in the mechanical industry, medical imaging, electronic information, and ultrasonic devices, etc. Generally, adding oxide dopants, or introducing new solid solutions to form the morphotropic phase boundary of the piezoelectric materials were common strategies to enhance the electric properties. In recent decades, rare-earth elements doped piezoelectric materials have attracted much attention due to their multifunctional performances combining piezoelectric and photoluminescence properties, which has potential applications in ultrasonics, electronics, automatic control, machinery and optoelectronic fields. An overview of the recent investigations and perspectives on rare-earth doped piezoelectric ceramics, single crystals, and films were presented.

Waveguide amplifiers in rare-earth doped glasses : fabrication, characterisation [MATH] modelling

1994 ◽  
Vol 04 (C4) ◽  
pp. C4-277-C4-280 ◽  
Author(s):  
B. HYDE ◽  
D. BARBIER ◽  
J. HUBNER ◽  
J.-M. JOUANNO ◽  
A. KEVORKIAN ◽  
...  
Keyword(s):  
Rare Earth ◽  
Waveguide Amplifiers ◽  
Doped Glasses ◽  
Rare Earth Doped

SYNTHESIS AND PHOTOLUMINESCENCE STUDIES OF RARE EARTH DOPED [1.5%] CaO

2019 ◽  
Vol 7 (3) ◽  
pp. 37
Author(s):  
JITESH CHANDRAPAL SHARMA ◽  
K. SURESH ◽  
Y. H. GANDHI ◽  
K. V. R. MURTHY ◽  
◽  
...  
Keyword(s):  
Rare Earth ◽  
Photoluminescence Studies ◽  
Rare Earth Doped

Improving VCSEL's & Rare-Earth-Doped Led's.

1998 ◽  
Author(s):  
hyatt M. Gibbs ◽  
Galina Khitrova
Keyword(s):  
Rare Earth ◽  
Rare Earth Doped

Phase selectivity and tunable photophysical nature of rare earth metal–organic frameworks of EuxY1−x-PTC (H3PTC = 2,4,6-pyridine tricarboxylic acid; x = 0–1)

2020 ◽  
Vol 49 (42) ◽  
pp. 14985-14994
Author(s):  
Xu-Sheng Gao ◽  
Mei-Juan Ding ◽  
Jin Zhang ◽  
Li-Duo Zhao ◽  
Xiao-Ming Ren
Keyword(s):  
Rare Earth ◽  
Solid Solutions ◽  
Rare Earth Metal ◽  
Metal Organic Frameworks ◽  
Earth Metal ◽  
Tricarboxylic Acid ◽  
Excitation Wavelength ◽  
Metal Organic ◽  
Phase Selectivity

All solid solutions (EuxY1−x-PTC, x = 0.013–0.82) are isomorphic to Eu-PTC, but different from Y-PTC, and show phase selectivity as well as excitation wavelength dependent emission.

Sign in / Sign up

Export Citation Format

Share Document