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Lead free and cadmium free diamagnetic magnetic rotation glass

A magneto-optical and diamagnetic technology, which is applied in the field of lead-free and cadmium-free diamagnetic magneto-optical glasses for Faraday rotators, can solve the problems of low Verdet constant and oxidation Lead and other problems, to achieve excellent chemical stability and thermal stability, good wire drawing performance, high strength effect

Inactive Publication Date: 2008-12-24
祁学孟 +1
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  • Abstract
  • Description
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Problems solved by technology

[0004] It can be seen from the table that there are two problems with these grades of optical glass: one is that the Verdet constant is too low to meet the requirements for manufacturing high-sensitivity measurement and monitoring equipment; the other is that the components contain a large amount of lead oxide
The Verdet constant changes greatly with temperature, especially in the range of -40 to +80°C, and the performance changes rapidly, which is not suitable for long-term use in outdoor environments; on the other hand, FR-2, which has the largest Verdet constant, has only +0.072min / oe.cm, so less sensitive, well known

Method used

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  • Lead free and cadmium free diamagnetic magnetic rotation glass

Examples

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Effect test

Embodiment 1

[0030] Each oxide composition (mol%): SiO 2 3%, B 2 o 3 57%, La 2 o 3 10%, Yb 2 o 3 6%, Sm 2 o 3 2%, Bi 2 o 3 8%, Nb 2 o 5 5%, Ta 2 o 5 2%, Sb 2 o 3 1%, WO 3 6%.

[0031] The preparation method of this example: accurately weigh the raw materials of the above-mentioned oxides, mix them evenly, and use a platinum crucible or a high-quality zirconium-titanium corundum crucible to melt them in a clean vacuum high-temperature electric furnace or a high-frequency vacuum furnace at a temperature of 1050 ° C. After pouring and annealing the uniformly melted glass, it is made into lead-free and cadmium-free antimagnetic magnetic optical glass for various rotating components.

[0032] The Verdet constant V=+0.242min / oe.cm, Tg=660°C, Ts=680°C, crystallization temperature range of 690-880°C, and silk-forming performance at 950-1050°C of the diamagnetic magneto-optical glass of this embodiment good.

Embodiment 2

[0034] Oxide composition (mol%): SiO 2 2.0%, B 2 o 3 58%, La 2 o 3 6%, Yb 2 o 3 3%, Sm 2 o 3 3%, Bi 2 o 3 6%, Sb 2 o 3 5%, Ta 2 o 5 4%, WO 3 9%, ZnO 2%, BaO 2%.

[0035] The preparation method of this example: accurately weigh the raw materials of the above-mentioned oxides, mix them evenly, and melt them in a clean vacuum high-temperature electric furnace or a high-frequency vacuum furnace at a temperature of 1300 °C with a platinum crucible or a high-quality zirconium-titanium corundum crucible After pouring and annealing the uniformly melted glass, it is made into lead-free and cadmium-free antimagnetic magnetic optical glass for various rotating components.

[0036] The Verdet constant V of the diamagnetic magneto-optical glass in this embodiment is V=+0.162 min / oe.cm, and the glass has good silky properties.

Embodiment 3

[0038] Oxide composition (mol%): SiO 2 4%, B 2 o 3 55%, La 2 o 3 8%, Yb 2 o 3 9%, Sm 2 o 3 6%, Bi 2 o 3 13%, WO 3 5%.

[0039] The preparation method of this example: accurately weigh the raw materials of the above-mentioned oxides, mix the raw materials, and use a platinum crucible or a high-quality zirconium-titanium corundum crucible to melt in a clean vacuum high-temperature electric furnace or a high-frequency vacuum furnace at a temperature of 1150 ° C. After pouring and annealing the uniformly melted molten glass, it is made into lead-free and cadmium-free antimagnetic magnetic optical glass for various rotating components.

[0040] The Verdet constant V of the diamagnetic magneto-optical glass of this embodiment=+0.40min / oe.cm.

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Abstract

The invention discloses a lead and cadmium free diamagnetic magnetic rotation glass melted by oxides according to a certain mol percent: Sm2O3, Ta2O5, SiO2, Yb2O3, Nb2O5, B2O3, Sb2O3, Bi2O3, La2O3, WO3, BaO and ZnO using optical glass batch classic melting method. The lead and cadmium free diamagnetic magnetic rotation glass of the invention is not sensitive to temperature with the verdet constant V=+0.20- +0.50min / oe.cm, has excellent chemical stability and thermal stability, good drawing property and high intensity, can be of a block, column, strip or optical fiber shape, which is used in faraday rotation elements and producing magnetic optical current transformer, optical isolator, magnetic optical modulator and laser small angle deflection measuring instrument, improves the measuring sensitivity of the instrument and achieves effective measurement and monitoring.

Description

technical field [0001] The invention relates to a magnetic optical rotation glass, in particular to a lead-free and cadmium-free antimagnetic magnetic optical rotation glass for a Faraday rotation element. Background technique [0002] In the 1980s, some technologically advanced countries, such as the United States, Japan, Britain, France, and Germany, developed a kind of MOCT technology, which provided the possibility for the power industry to realize automatic monitoring and measurement. Therefore, the technology was quickly recognized by various countries. In terms of applicability, this component must have an extremely low temperature coefficient and a large Verdet constant in order to meet the requirements of the power industry transmission system. Due to the unique advantages of flint glass, scientific and technological workers have chosen SF glass after decades of exploration. 6 , SF 57 and FR-2 and other heavy flint glasses, the Verdet constant and composition (wt...

Claims

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Application Information

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IPC IPC(8): C03C4/00C03C3/068
Inventor 祁学孟祁堃
Owner 祁学孟
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