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 glass for Faraday rotators, can solve the problems of low Verdet constant and performance changes that cannot meet the requirements of manufacturing high-sensitivity measurement and monitoring equipment Fast and other problems, to achieve excellent chemical stability and thermal stability, good wire drawing performance, and improve the effect of measurement sensitivity

Inactive Publication Date: 2010-12-08
祁学孟 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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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

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Embodiment 1

[0031] Composition of each oxide (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%.

[0032] The preparation method of this embodiment: accurately weigh the raw materials of the above-mentioned oxides, mix them uniformly, and melt them in a platinum crucible or high-quality zirconium-titanium corundum crucible in a clean vacuum high-temperature electric furnace or high-frequency vacuum furnace at a temperature of 1050°C , After the uniform molten glass is poured into shape and annealed, it is made into lead-free and cadmium-free diamagnetic optically rotating glass for various rotating elements.

[0033] The Feld constant of the diamagnetic optically active glass of this example is V = +0.242min / oe.cm, Tg = 660°C, Ts = 680°C, the crystallization temperature range is 690 to 880°C, and the filament formation performance is at 950 to 1050°C good.

Embodiment 2

[0035] 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%.

[0036] The preparation method of this embodiment: accurately weigh the raw materials of the above-mentioned oxides, mix them uniformly, and melt them in a platinum crucible or high-quality zirconium-titanium corundum crucible in a clean vacuum high-temperature electric furnace or high-frequency vacuum furnace at a temperature of 1300°C , After the uniform molten glass is poured into shape and annealed, it is made into lead-free and cadmium-free diamagnetic optically rotating glass for various rotating elements.

[0037] The Feld constant V of the diamagnetic optically rotatory glass of this example is +0.162min / oe.cm, and the glass has good silk-forming properties.

Embodiment 3

[0039] 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%.

[0040] The preparation method of this embodiment: accurately weigh the raw materials of the above-mentioned oxides, mix the raw materials, use platinum crucibles or high-quality zirconium-titanium corundum crucibles, and melt them in a clean vacuum high-temperature electric furnace or high-frequency vacuum furnace at a temperature of 1150°C. After the uniformly melted glass is poured into shape and annealed, it is made into lead-free and cadmium-free diamagnetic optically active glass for various rotating elements.

[0041] The Feld constant V of the diamagnetic optically rotatory glass of this embodiment is +0.40 min / 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 magneto-optical glass, in particular to a lead-free and cadmium-free diamagnetic magneto-optical glass for a Faraday rotating element. Background technique [0002] In the 1980s, some technologically advanced countries, such as the United States, Japan, Britain, France, Germany, etc., developed a MOCT technology that made it possible for the power industry to realize automated monitoring and measurement. Therefore, the technology quickly gained recognition in various countries. In terms of applicability, this component must have a very low temperature coefficient and a large Feld 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 after decades of exploration 6 , SF 57 Heavy flint glass equal to FR-2, the Feld constant and composition (wt%) of these glasses are as follows: [0003] Glass plate n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C4/00C03C3/068
Inventor 祁学孟祁堃
Owner 祁学孟
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