Czochralski crystal growth, microstructure and spectroscopic properties of PrAlO3 perovskite

Pawlak, Dorota A.; Łukasiewicz, T.; Carpenter, Michael A.; Malinowski, M.; Diduszko, R.; Kisielewski, J.

doi:10.1016/j.jcrysgro.2005.04.106

Cited by 32 publications

(52 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For the undoped PrAlO 3 grown by the Czochralski method, a potential application could be a tunable laser in the whole visible region. Unfortunately, at this stage, the emission seems rather weak [10].…”

Section: Introductionmentioning

confidence: 89%

“…In the crystal electric field, the 4f 2 multiplet of Pr 3+ ( 3 H 4 ) splits into a singlet, a doublet and two triplets, though a singlet is usually the ground state. At low temperatures, only the ground singlet is populated, leading to the temperature independent susceptibility [10].…”

Section: Introductionmentioning

confidence: 99%

“…The single crystal of the PrAlO 3 compound has been grown by the Czochralski method [8,10] and its electronic structure was investigated [11]. It was shown that the as-grown crystal had a brown colour, similar to that of the mixed valence praseodymium oxide, Pr 6 O 11 .…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Magnetic properties of manganese doped PrAlO3 monocrystalline fibres

Guzik

Talik

Pajączkowska

et al. 2014

Materials Science-Poland

View full text Add to dashboard Cite

Monocrystalline fibres of undoped PrAlO 3 and PrAlO 3 :0.1 Mn, have been grown by the pulling-down method under nitrogen atmosphere. The as-grown crystal doped with Mn had a visible brown core surrounded by a green ring, whereas this effect was weaker for the undoped PrAlO 3 . A coloration of the brown core was caused by a presence of Pr 4+ ions. The presence of the Pr 4+ ions was confirmed by XPS and magnetic studies. The XPS chemical analysis showed the increased concentration of oxygen in the crystals with the brown core. The most probable valency of manganese is Mn 4+ . It is located in Al 3+ sites.

show abstract

Section: Introductionmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Magnetic properties of manganese doped PrAlO3 monocrystalline fibres

Guzik

Talik

Pajączkowska

et al. 2014

Materials Science-Poland

View full text Add to dashboard Cite

show abstract

“…The same trend in color change also occurred in other Pr-containing materials reported by other groups. 46,47 After the experiment, slight cracks were observed on the surface of PBI910. Because these cracks did not reach the other side of the pellet, gas leakage did not occur during the experiment.…”

Section: Emf Of Hydrogen Concentration Cells-mentioning

confidence: 99%

Ionic Conduction and Power Generation Characteristics of Pr-Doped Ba₂In₂O₅for Proton-Conducting SOFCs

Ihara

2015

J. Electrochem. Soc.

View full text Add to dashboard Cite

Highly Pr-doped Ba 2 In 2 O 5 (PBI) was successfully fabricated and its ionic conduction and power generation characteristics were studied in this work. Two PBI materials of different concentration ratio were evaluated: Pr:Ba:In = 0.9:1.1:1 (PBI910) and Pr:Ba:In = 1:1:1 (PBI000). PBI910 material was confirmed as single phase with cubic perovskite structure. However, PBI000 had both cubic phase and impurity phase. In a hydrogen concentration cell, the measured proton transfer number t H + of PBI910 at 500 • C was 0.81 and then decreased with increasing temperature, whereas the oxide ion transfer number t O 2− was 0.07 and then increased with increasing temperature. Power generation experiments were evaluated at 500 • C to 900 • C using PBI as electrolyte and H 2 as fuel. Results revealed that t H + and t O 2− showed different dependency on temperature and significantly affected the power density. Proton conduction dominated from 500 • C∼600 • C, and power density increased with increasing operating temperature due to improved proton conductivities. However, at 600∼800 • C, proton conductivities decreased, which caused a decrease in power density. Further increase in temperature into the 800 • C∼900 • C range showed oxide ion conduction to then dominate, and the consequent improved oxide ion conductivity again increased the power density Currently used SOFCs operate at temperatures above 800• C because their Y 2 O 3 -stabilized ZrO 2 electrolyte (YSZ) requires high temperature to limit ohmic losses across the electrolyte. However, the goal in SOFC development of lowering the operating temperature can significantly improve the reliability, durability, and stability of SOFCs. One target of recent SOFC research is to develop intermediate temperature SOFC systems (IT-SOFCs), namely, operating at 500• C∼700• C. Operating at such intermediate temperature has several advantages. First, reactions between the cell components are suppressed 1 , thus improving the durability of the system. Second, the electrochemical reaction on an electrode is rapid compared with that at temperatures below 500• C, and thus the over potential is relatively low, which in turn enables a high power density. To develop IT-SOFCs, faster ionic conductors are needed to replace the conventional YSZ electrolyte. 2-6A recent strategy is the use of ceramic materials with high proton conductivities as electrolyte for Compared with oxide-ion-conducting SOFCs, proton-conducting SOFCs (PC-SOFCs) generate water at the cathode side. Theoretically, open current voltage (OCV) calculated by the Nernst equation should be kept high under high fuel utilization operation conditions in PCSOFCs and thus provide an opportunity to develop a system with both high power density and high fuel utilization.8 Among reported proton conductors, materials with perovskite structure show higher conductivities than other structures such as LaP 3 O 9 , 9 LaNbO 4 , 10 and LaBaGaO 4 .11 In perovskite-type materials, the highest conductivities have been achieved using BaCeO 3 doped w...

show abstract

“…It is also very interesting in view of the complicated phase transitions, some of them ascribed to the ion lattice coupling. One of the aspects of the interest is connected with the preparation of crystals with self--organized domain structure, with possible application in light guiding [1]. The open problem in the technology of these crystals is the characterisation including examination of the geometrical and crystallographic features of the observed domain structure, and the presence of other crystallographic defects, as dislocations and inclusions.…”

Section: Introductionmentioning

confidence: 99%

X-ray Topographic Investigations of Domain Structure in Czochralski Grown Pr_xLa_1-xAlO₃Crystals

et al. 2010

Self Cite

View full text Add to dashboard Cite

In the present paper X-ray diffraction topographic techniques were applied to a number of samples cut from Czochralski grown PrxLa1−xAlO3 crystals with different ratio of praseodymium and lanthanum. Conventional and synchrotron X-ray topographic investigations revealed differently developed domain structures dependent on the composition of mixed praseodymium lanthanum aluminium perovskites. Some large mosaic blocks were observed together with the domains. In the best crystals, X-ray topographs revealed striation fringes and individual dislocations inside large domains. Synchrotron topographs allowed us to indicate that the domains correspond to three different crystallographic planes, and to evaluate the lattice misorientation between domains in the range of 20-50 arc min.

show abstract

Czochralski crystal growth, microstructure and spectroscopic properties of PrAlO3 perovskite

Cited by 32 publications

References 34 publications

Magnetic properties of manganese doped PrAlO3 monocrystalline fibres

Magnetic properties of manganese doped PrAlO3 monocrystalline fibres

Ionic Conduction and Power Generation Characteristics of Pr-Doped Ba₂In₂O₅for Proton-Conducting SOFCs

X-ray Topographic Investigations of Domain Structure in Czochralski Grown Pr_xLa_1-xAlO₃Crystals

Contact Info

Product

Resources

About

Czochralski crystal growth, microstructure and spectroscopic properties of PrAlO3 perovskite

Cited by 32 publications

References 34 publications

Magnetic properties of manganese doped PrAlO3 monocrystalline fibres

Magnetic properties of manganese doped PrAlO3 monocrystalline fibres

Ionic Conduction and Power Generation Characteristics of Pr-Doped Ba2In2O5for Proton-Conducting SOFCs

X-ray Topographic Investigations of Domain Structure in Czochralski Grown PrxLa1-xAlO3Crystals

Contact Info

Product

Resources

About

Ionic Conduction and Power Generation Characteristics of Pr-Doped Ba₂In₂O₅for Proton-Conducting SOFCs

X-ray Topographic Investigations of Domain Structure in Czochralski Grown Pr_xLa_1-xAlO₃Crystals