Extended X-ray absorption fine structure, X-ray diffraction and Raman analysis of nickel-doped Ba(Mg1/3Ta2/3)O3

Chen, Mei Yu; Chang, P. J.; Chia, Chih Ta; Lee, Y. C.; Lin, I‐Nan; Liu, Lin; Lee, J. F.; Lee, H. Y.; Shimada, Takeshi

doi:10.1016/j.jeurceramsoc.2006.11.025

Cited by 5 publications

(3 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It means that the disordered sample has a 1:2 order at short range, since the superlattice reflections did not appear in its pXRD pattern in Fig. 1 It is worth mentioning that the A 1g mode in the wavenumber range 700-900 cm -1 is very sensitive to the cation ordering at B-site [30,34,48]. Such a mode denotes a breathing type vibration of oxygen atoms, being its wavenumber dependent on the B-O and O-O bond strengths [49].…”

Section: Insert Here: Tablementioning

confidence: 99%

See 1 more Smart Citation

Ordering effect on the electrical properties of stoichiometric Ba3CaNb2O9-based perovskite ceramics

Rodrigues

Bezerra

Hernandes

2017

Ceramics International

View full text Add to dashboard Cite

Cation ordering is most common process detected in A 3 B'B'' 2 O 9 -based complex perovskites. Some important physical features of this system are due to the B-site ordering at long and short range. For microwave applications as filters and resonators, the 1:2 order is more appropriate. Otherwise, the oxygen vacancies and 1:1 order are considered the main factors behind the good performance of nonstoichiometric A 3 B' 1+x B'' 2-x O 9-δ -based ceramics as proton conductors. Until now, however, there are no available reports regarding the isolated effects of B-site order at long range on the electrical properties of stoichiometric systems. This work reports the preparation of 1:1 and 1:2 fully-ordered Ba 3 CaNb 2 O 9 ceramics. Here, we combine the Raman scattering and group-theory calculations to distinguish the fingerprints of the 1:1 and 1:2 orders. The electric properties of the ordered Ba 3 CaNb 2 O 9 are analyzed in terms of a phenomenological model based on a parallel combination of a resistor, constant phase element, and capacitor. In particular, the conductivity relaxation ascribed to the grain is due to the oxygen vacancies. Besides, we found that the 1:1 order increases the dc conductivity, but not enough to account the good performance reported for the non-stoichiometric Ba 3 Ca 1+x Nb 2-x O 9-δ -based proton conductors.

show abstract

Section: Insert Here: Tablementioning

confidence: 99%

“…It is worth mentioning that the A 1g mode in the wavenumber range 700-900 cm -1 is very sensitive to the cation ordering at B-site [30,34,48]. Such a mode denotes a breathing type vibration of oxygen atoms, being its wavenumber dependent on the B-O and O-O bond strengths [49].…”

Section: Insert Here: Figurementioning

confidence: 99%

Ordering effect on the electrical properties of stoichiometric Ba3CaNb2O9-based perovskite ceramics

Rodrigues

Bezerra

Hernandes

2017

Ceramics International

View full text Add to dashboard Cite

show abstract

“…The phonon width is related to the lifetime of phonon propagation, and larger widths give short lifetimes. 23) Therefore, the Q Â f value is also related to the propagation length of the microwave, and this indicates that structural properties of oxygen octahedra affect the Q Â f value. Our investigation indicates that strontium substitution at the A-site and zirconium substitution 12) at the B-site of CMN ceramics cause a similar degradation of Q Â f .…”

Section: Discussionmentioning

confidence: 99%

Structural and Dielectric Characteristics of Calcium Strontium Magnesium Niobate

Lee

Huang

Lin

et al. 2009

jjap

View full text Add to dashboard Cite

The dielectric and structural characteristics of (Ca 1Àx Sr x )(Mg 1=3 Nb 2=3 )O 3 , (x ¼ 0 { 0:5) solid solutions are investigated by measuring and observing these properties by X-ray diffractometry, transmission electron microscopy, and Raman spectroscopy. The splitting of superlattice reflections shows that the (Ca 1Àx Sr x )(Mg 1=3 Nb 2=3 )O 3 solid solution has a 1 : 2 ordered structure distorted by the antiphase, the in-phase tilting of oxygen octahedra, and the antiparallel shift of cations at 0 x 0:5. The strontium substitution causes a tolerance factor increase, which leads to higher structure symmetry. This study indicates that ionic polarizability, tolerance factor, cation substitution, and grain size have a significant effect on the microwave dielectric properties of this solid solution.

show abstract

Structure and infrared radiation property of Co1−x Zn x Fe2O4 ferrites by XAFS analysis

Zhang

Di-jiang

Zhou

et al. 2009

J. Wuhan Univ. Technol.-Mat. Sci. Edit.

View full text Add to dashboard Cite

Extended X-ray absorption fine structure, X-ray diffraction and Raman analysis of nickel-doped Ba(Mg1/3Ta2/3)O3

Cited by 5 publications

References 20 publications

Ordering effect on the electrical properties of stoichiometric Ba3CaNb2O9-based perovskite ceramics

Ordering effect on the electrical properties of stoichiometric Ba3CaNb2O9-based perovskite ceramics

Structural and Dielectric Characteristics of Calcium Strontium Magnesium Niobate

Structure and infrared radiation property of Co1−x Zn x Fe2O4 ferrites by XAFS analysis

Contact Info

Product

Resources

About