Influence of rare earth additives and boron component on electrical conductivity of sodium rare earth borate glasses

Susumu Nakayama; Takamitsu Watanabe; Taro Asahi; Hajime Kiyono; Yan Lin Aung; Masatomi Sakamoto

doi:10.1016/j.ceramint.2010.07.026

Influence of rare earth additives and boron component on electrical conductivity of sodium rare earth borate glasses

Susumu Nakayama, Takamitsu Watanabe, Taro Asahi, Hajime Kiyono, Yan Lin Aung, Masatomi Sakamoto

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

Abstract

Sodium rare earth borate glasses (Na₂O)_35.7(RE ₂O₃)_7.2(B₂O₃) _57.1 (RE = Sm, Gd, Dy, Ho, Y, Er, and Yb), were prepared from a mixture of Na₂CO₃, RE₂O₃ and B ₂O₃, and their properties as an Na⁺ ionic conductor were investigated. Density increased with increasing atomic weight of RE. Crystallization temperature and crystal melting temperature of the present borate system was lower than that of the previously reported silicate and germanate system. Results of the ¹¹B NMR measurement suggested that half of all boron atoms are coordinated by four oxide ions to give a [BO ₄] tetrahedral unit and the others are coordinated by three oxide ions to give a [BO₃] planar triangular unit. The electrical conductivity slightly decreased with increasing the ionic radius of RE ³⁺. (Na₂O)_35.7(Y₂O₃) _7.2(B₂O₃)_57.1 glass exhibited the electrical conductivity which is about one order of magnitude lower than those of the previously reported (Na₂O)_35.7(Y₂O ₃)_7.2(SiO₂)_57.1 and (Na ₂O)_35.7(Y₂O₃)_7.2(GeO ₂)_57.1 glasses. It was assumed that this lower electrical conductivity is due to the lower content of Na⁺ ions as conduction species in the former glass, compared with the latter two glasses.

Original language	English
Pages (from-to)	2323-2327
Number of pages	5
Journal	Ceramics International
Volume	36
Issue number	8
DOIs	https://doi.org/10.1016/j.ceramint.2010.07.026
Publication status	Published - 2010 Dec
Externally published	Yes

Keywords

C. Ionic conductivity
C. Thermal properties
D. Glass

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Process Chemistry and Technology
Surfaces, Coatings and Films
Materials Chemistry

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10.1016/j.ceramint.2010.07.026

Cite this

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title = "Influence of rare earth additives and boron component on electrical conductivity of sodium rare earth borate glasses",

abstract = "Sodium rare earth borate glasses (Na2O)35.7(RE 2O3)7.2(B2O3) 57.1 (RE = Sm, Gd, Dy, Ho, Y, Er, and Yb), were prepared from a mixture of Na2CO3, RE2O3 and B 2O3, and their properties as an Na+ ionic conductor were investigated. Density increased with increasing atomic weight of RE. Crystallization temperature and crystal melting temperature of the present borate system was lower than that of the previously reported silicate and germanate system. Results of the 11B NMR measurement suggested that half of all boron atoms are coordinated by four oxide ions to give a [BO 4] tetrahedral unit and the others are coordinated by three oxide ions to give a [BO3] planar triangular unit. The electrical conductivity slightly decreased with increasing the ionic radius of RE 3+. (Na2O)35.7(Y2O3) 7.2(B2O3)57.1 glass exhibited the electrical conductivity which is about one order of magnitude lower than those of the previously reported (Na2O)35.7(Y2O 3)7.2(SiO2)57.1 and (Na 2O)35.7(Y2O3)7.2(GeO 2)57.1 glasses. It was assumed that this lower electrical conductivity is due to the lower content of Na+ ions as conduction species in the former glass, compared with the latter two glasses.",

keywords = "C. Ionic conductivity, C. Thermal properties, D. Glass",

author = "Susumu Nakayama and Takamitsu Watanabe and Taro Asahi and Hajime Kiyono and Aung, {Yan Lin} and Masatomi Sakamoto",

year = "2010",

month = dec,

doi = "10.1016/j.ceramint.2010.07.026",

language = "English",

volume = "36",

pages = "2323--2327",

journal = "Ceramics International",

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TY - JOUR

T1 - Influence of rare earth additives and boron component on electrical conductivity of sodium rare earth borate glasses

AU - Nakayama, Susumu

AU - Watanabe, Takamitsu

AU - Asahi, Taro

AU - Kiyono, Hajime

AU - Aung, Yan Lin

AU - Sakamoto, Masatomi

PY - 2010/12

Y1 - 2010/12

N2 - Sodium rare earth borate glasses (Na2O)35.7(RE 2O3)7.2(B2O3) 57.1 (RE = Sm, Gd, Dy, Ho, Y, Er, and Yb), were prepared from a mixture of Na2CO3, RE2O3 and B 2O3, and their properties as an Na+ ionic conductor were investigated. Density increased with increasing atomic weight of RE. Crystallization temperature and crystal melting temperature of the present borate system was lower than that of the previously reported silicate and germanate system. Results of the 11B NMR measurement suggested that half of all boron atoms are coordinated by four oxide ions to give a [BO 4] tetrahedral unit and the others are coordinated by three oxide ions to give a [BO3] planar triangular unit. The electrical conductivity slightly decreased with increasing the ionic radius of RE 3+. (Na2O)35.7(Y2O3) 7.2(B2O3)57.1 glass exhibited the electrical conductivity which is about one order of magnitude lower than those of the previously reported (Na2O)35.7(Y2O 3)7.2(SiO2)57.1 and (Na 2O)35.7(Y2O3)7.2(GeO 2)57.1 glasses. It was assumed that this lower electrical conductivity is due to the lower content of Na+ ions as conduction species in the former glass, compared with the latter two glasses.

AB - Sodium rare earth borate glasses (Na2O)35.7(RE 2O3)7.2(B2O3) 57.1 (RE = Sm, Gd, Dy, Ho, Y, Er, and Yb), were prepared from a mixture of Na2CO3, RE2O3 and B 2O3, and their properties as an Na+ ionic conductor were investigated. Density increased with increasing atomic weight of RE. Crystallization temperature and crystal melting temperature of the present borate system was lower than that of the previously reported silicate and germanate system. Results of the 11B NMR measurement suggested that half of all boron atoms are coordinated by four oxide ions to give a [BO 4] tetrahedral unit and the others are coordinated by three oxide ions to give a [BO3] planar triangular unit. The electrical conductivity slightly decreased with increasing the ionic radius of RE 3+. (Na2O)35.7(Y2O3) 7.2(B2O3)57.1 glass exhibited the electrical conductivity which is about one order of magnitude lower than those of the previously reported (Na2O)35.7(Y2O 3)7.2(SiO2)57.1 and (Na 2O)35.7(Y2O3)7.2(GeO 2)57.1 glasses. It was assumed that this lower electrical conductivity is due to the lower content of Na+ ions as conduction species in the former glass, compared with the latter two glasses.

KW - C. Ionic conductivity

KW - C. Thermal properties

KW - D. Glass

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JO - Ceramics International

JF - Ceramics International

IS - 8

ER -

Influence of rare earth additives and boron component on electrical conductivity of sodium rare earth borate glasses

Abstract

Keywords

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