Raman and infrared spectra of KNbO3 in niobate glass-ceramics

被引：55

作者：

de Andrade, JS

Pinheiro, AG

Vasconcelos, IF

Sasaki, JM

de Paiva, JAC

Valente, MA

Sombra, ASB

机构：

[1] Univ Fed Ceara, Dept Fis, Lab Opt Linear & Ciencia Mat, BR-60455760 Fortaleza, Ceara, Brazil

[2] Univ Aveiro, Dept Fis, P-3810 Aveiro, Portugal

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1999年 / 11卷 / 22期

关键词：

D O I：

10.1088/0953-8984/11/22/315

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Potassium niobophosphate glasses and glass-ceramics of the family [xNb(2)O(5).(50-x)P2O5. 50K(2)O]:yFe(2)O(3) were studied by x-ray powder diffraction, infrared and Raman scattering spectroscopy. For the potassium-phosphate samples [50P(2)O(5)-50K(2)O] the iron oxide presents a network former behaviour, for 2 mol% of Fe2O3 doping. The precipitation of crystalline K4Nb6O17 and ferroelectric KNbO3 crystals was confirmed by x-ray powder diffraction in the samples with x = 40 and 50 mol% respectively. The infrared and Raman scattering spectroscopy results suggest that the increase of the ratio Nb2O5/P2O5 leads the niobium to sites of octahedral symmetry and consequently to the formation of ferroelectric KNbO3, as seen by x-ray diffraction analysis.

引用

页码：4451 / 4460

页数：10

共 29 条

[1] WAVE-GUIDES IN LITHIUM-NIOBATE [J].

ABOUELLEIL, MM ;

LEONBERGER, FJ .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1989, 72 (08) :1311-1321

[2] Structure and optical properties of lithium niobium-phosphate glasses and glass ceramics [J].

Araújo, EB ;

dePaiva, JAC ;

deAraujo, MAB ;

Sombra, ASB .

PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS, 1996, 197 (01) :231-240

[3] OPTICAL MODES AND DIELECTRIC PROPERTIES OF FERROELECTRIC ORTHORHOMBIC KNBO-3 [J].

BOZINIS, DG ;

HURRELL, JP .

PHYSICAL REVIEW B, 1976, 13 (07) :3109-3120

[4]

CORBRIDGE DE, 1954, J CHEM SOC I, V493

[5] INELASTIC NEUTRON-SCATTERING IN ORTHORHOMBIC KNBO3 [J].

CURRAT, R ;

COMES, R ;

DORNER, B ;

WIESENDANGER, E .

JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1974, 7 (14) :2521-2539

[6] Structure of iron niobophosphate glasses investigated by DTA, infrared and Mossbauer spectroscopy [J].

de Almeida, EF ;

de Paiva, JAC ;

de Araujo, MAB ;

Araujo, EB ;

Eiras, JA ;

Sombra, ASB .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1998, 10 (34) :7511-7518

[7]

DeAbreu JAM, 1997, PHYS STATUS SOLIDI A, V162, P515, DOI 10.1002/1521-396X(199708)162:2<515::AID-PSSA515>3.0.CO

[8]

2-U

[9] THERMALLY STIMULATED DEPOLARIZATION CURRENT AND MOSSBAUER-SPECTROSCOPY OF IRON-DOPED NIOBOPHOSPHATE GLASSES [J].

DEOLIVEIRA, CJ ;

DEPAIVA, JAC ;

BARBOSA, PC ;

MENDES, J ;

DEOLIVEIRA, JCP ;

SOMBRA, ASB ;

ARANHA, N ;

BARBOSA, LC ;

ALVES, OL .

JOURNAL OF MATERIALS SCIENCE, 1993, 28 (16) :4305-4310

[10]

ELJAZOULI A, 1982, ANN CHIM-SCI MAT, V7, P285

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