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Soret coefficients of alkali oxides in alkali borate glass melts

Soret coefficients of alkali oxides in alkali borate glass melts
Soret coefficients of alkali oxides in alkali borate glass melts
We measured the Soret coefficients of alkali oxides in binary alkali borate glass melts. The alkali borate glasses, 15(mol %)Li2O–85B2O3, 15Na2O–85B2O3, and 15K2O–85B2O3, were encapsulated in platinum capsules and heat-treated at 1000°C with a temperature gradient in a tube furnace. After the heat treatment, the compositional distribution of the glass sample was measured by Raman spectroscopy. The Soret coefficients of the alkali oxides Li2O, Na2O, and K2O increased with the atomic numbers of the alkali metal ions. This indicates that alkali oxides more easily have high concentration in cold regions as the atomic numbers of the alkali metal ions in the alkali oxides increase. This result provides new information about the diffusion properties in glass melts.
Soret effect, Glass melts, Borate glass
1882-0743
774-776
Shimizu, Masahiro
f08d0c1c-3975-4979-a49d-50fe94bfdc80
Hanakawa, Daisuke
00d265b8-9f76-4d8e-ae0d-b2d003726c1c
Nishi, Masayuki
4ccdf7c3-f87c-40ab-9069-02eaee4487ce
Nagashima, Kohji
4c61c12c-f36b-48b5-8a48-58932c01cddb
Heidy, Visbal
a694b2ec-2c08-43f6-b531-1c92b7cb5732
Sakakura, Masaaki
3bb15bbd-d590-4cba-ab5a-862dc7acd054
Shimotsuma, Yasuhiko
0664279b-def2-41d4-a5ec-207ce02013a7
Miura, Kiyotaka
5dbc9159-ace0-4dd9-b18d-36f87ae78c47
Hirao, Kazuyuki
5cc5061d-6217-49ae-bc92-ff5b72b9c6c2
Shimizu, Masahiro
f08d0c1c-3975-4979-a49d-50fe94bfdc80
Hanakawa, Daisuke
00d265b8-9f76-4d8e-ae0d-b2d003726c1c
Nishi, Masayuki
4ccdf7c3-f87c-40ab-9069-02eaee4487ce
Nagashima, Kohji
4c61c12c-f36b-48b5-8a48-58932c01cddb
Heidy, Visbal
a694b2ec-2c08-43f6-b531-1c92b7cb5732
Sakakura, Masaaki
3bb15bbd-d590-4cba-ab5a-862dc7acd054
Shimotsuma, Yasuhiko
0664279b-def2-41d4-a5ec-207ce02013a7
Miura, Kiyotaka
5dbc9159-ace0-4dd9-b18d-36f87ae78c47
Hirao, Kazuyuki
5cc5061d-6217-49ae-bc92-ff5b72b9c6c2

Shimizu, Masahiro, Hanakawa, Daisuke, Nishi, Masayuki, Nagashima, Kohji, Heidy, Visbal, Sakakura, Masaaki, Shimotsuma, Yasuhiko, Miura, Kiyotaka and Hirao, Kazuyuki (2016) Soret coefficients of alkali oxides in alkali borate glass melts. Journal of the Ceramic Society of Japan, 124 (7), 774-776. (doi:10.2109/jcersj2.16053).

Record type: Article

Abstract

We measured the Soret coefficients of alkali oxides in binary alkali borate glass melts. The alkali borate glasses, 15(mol %)Li2O–85B2O3, 15Na2O–85B2O3, and 15K2O–85B2O3, were encapsulated in platinum capsules and heat-treated at 1000°C with a temperature gradient in a tube furnace. After the heat treatment, the compositional distribution of the glass sample was measured by Raman spectroscopy. The Soret coefficients of the alkali oxides Li2O, Na2O, and K2O increased with the atomic numbers of the alkali metal ions. This indicates that alkali oxides more easily have high concentration in cold regions as the atomic numbers of the alkali metal ions in the alkali oxides increase. This result provides new information about the diffusion properties in glass melts.

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Published date: July 2016
Keywords: Soret effect, Glass melts, Borate glass

Identifiers

Local EPrints ID: 431146
URI: https://eprints.soton.ac.uk/id/eprint/431146
ISSN: 1882-0743
PURE UUID: 18fb0368-0c1f-49d0-8e92-629bd0f06b22

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Date deposited: 24 May 2019 16:30
Last modified: 24 May 2019 16:30

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Contributors

Author: Masahiro Shimizu
Author: Daisuke Hanakawa
Author: Masayuki Nishi
Author: Kohji Nagashima
Author: Visbal Heidy
Author: Yasuhiko Shimotsuma
Author: Kiyotaka Miura
Author: Kazuyuki Hirao

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