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Heavy metal borate glass with high v value and low temperature coefficient, preparation method and application

A borate glass and heavy metal technology, applied in the field of heavy metal borate glass, can solve the problems of high temperature dependence, low near-infrared band transmittance, small Verdet constant of diamagnetic magneto-optical glass, etc., and achieve low temperature dependence properties, excellent magnetic and optical properties, and good transmittance in the visible band

Inactive Publication Date: 2019-09-27
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention solves the technical problems of small Verdet constant of diamagnetic magneto-optical glass in the prior art, high temperature dependence in practical application and low near-infrared band transmittance

Method used

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  • Heavy metal borate glass with high v value and low temperature coefficient, preparation method and application
  • Heavy metal borate glass with high v value and low temperature coefficient, preparation method and application
  • Heavy metal borate glass with high v value and low temperature coefficient, preparation method and application

Examples

Experimental program
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Embodiment 1

[0029] A preparation method of heavy metal borate glass with high magneto-optical performance, the high-purity reagents PbO, H 3 BO 3 and Bi 2 o 3 , calculated according to the formula in row 1 of Table 1, weighed and shaken well to mix, put into a high-purity alumina crucible, heat to 200°C in a muffle furnace and keep it for 20-60min, so that H 3 BO 3 Generate B 2 o 3 , and then heated to 950°C for melting and clarification. At the beginning, heating to a temperature higher than the melting point is to clarify and remove air bubbles. Keep it for 1h and stir, and then cool down to 900°C. At this time, the temperature is lowered to the melting point. The cooling time is faster when pouring. Pour the molten liquid into a mold preheated to 280°C in advance, put it in an annealing furnace at the same temperature for 1.5 hours, then cool it down to room temperature (10-20°C) naturally after power off, and finally use tools to polish the sample and cutting.

[0030] Table 1...

Embodiment 2

[0033] In this example, the composition of the oxides in row 2 in Table 1 is followed, and the preparation process is consistent with Example 1.

Embodiment 3

[0035] In this embodiment, the composition of the oxides in row 3 in Table 1 is followed, and the preparation process is consistent with that of Embodiment 1.

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Abstract

The invention provides a high V-value and low-temperature coefficient heavy metal borate glass as well as a preparation method and the application thereof. The preparation method comprises the following steps: sufficiently mixing PbO and B2O3 or H3BO3 and Bi2O3, melting, and clarifying; or adding a rare-earth oxide or a transition metal oxide, performing stirring homogenization, and implementing amelting-casting method, so as to obtain the high V-value and low-temperature coefficient heavy metal borate glass. The heavy metal borate glass provided by the invention is low in manufacturing cost,has a high Verdet constant and very low temperature dependency, can be widely applied to design of various magnetic-optical devices, and needs no temperature compensation technique; the glass is excellent in magnetorotation property, has near-infrared permeability up to 85%, and is applicable to manufacturing of various magnetic-optical devices such as magnetic-optical current sensors, magnetic-optical switches, magnetic-optical modulators and magnetic-optical isolators.

Description

technical field [0001] The invention relates to the field of high magneto-optical glass, in particular to a heavy metal borate glass with high magneto-optic performance and low temperature coefficient. Background technique [0002] Magneto-optical materials refer to substances that have Faraday rotation effects when the direction of the applied magnetic field is parallel to the direction of polarized light transmission. Significant progress has been made in the study of the properties of substances. Magneto-optical materials are currently widely used in devices such as magneto-optical isolators, magneto-optic sensors, and magneto-optical switches. The early magneto-optical materials were mainly magneto-optic crystals, but their raw materials were difficult to melt uniformly to obtain larger single crystals during the preparation process, resulting in complex processes and high prices. Compared with magneto-optic crystals, magneto-optic glass is less affected by temperature...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C4/00C03C3/15
Inventor 钱鹏远王双保王宇杰
Owner HUAZHONG UNIV OF SCI & TECH
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