Title:
GLASS MATERIAL AND METHOD FOR PRODUCING THE SAME
Document Type and Number:
Japanese Patent JP2018008839
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a glass material suitable for a magneto-optical element constituting a magnetic device such as an optical isolator, an optical circulator and a magnetic sensor which exhibits high Faraday effect compared to the conventional art and has excellent laser damage resistance.SOLUTION: There is provided a glass material which comprises, in mol%, 50 to less than 75% of TbOand more than 5 to less than 50% of PO, wherein the content of BOpreferably is 0 to less than 45% and the content of SiOpreferably is 0 to less than 45%. There is provided a method for producing a glass material which comprises a step of heating and melting a glass raw material lump 12 in a state where the glass raw material lump 12 is floated and held to obtain molten glass, followed by cooling the molten glass.SELECTED DRAWING: Figure 1
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Inventors:
SUZUKI FUTOSHI
Application Number:
JP2016137501A
Publication Date:
January 18, 2018
Filing Date:
July 12, 2016
Export Citation:
Assignee:
NIPPON ELECTRIC GLASS CO
International Classes:
C03C3/16; C03B8/00; C03C3/062; C03C3/068; C03C3/17; C03C3/19; C03C4/00; G02F1/09
Domestic Patent References:
| JPH10297933A | 1998-11-10 | |||
| JPH04170338A | 1992-06-18 | |||
| JPS5413522A | 1979-02-01 | |||
| JPS43235B1 | ||||
| JP2016050155A | 2016-04-11 |
Other References:
G. P. SMITH: "Some light on glass", GLASS TECHNOLOGY, vol. 20, no. 4, JPN6020025512, August 1979 (1979-08-01), pages 149 - 157, ISSN: 0004418481