A kind of paramagnetic optically active glass and preparation method thereof

Abstract

The invention discloses paramagnetic faraday rotator glass and a preparation method thereof. The preparation method comprises the following steps: uniformly mixing tetraterbium heptaoxide, boric acid, aluminium oxide, ammonium dihydrogen phosphate, antimony oxide and silicon carbide so as to obtain mixed batch; and then melting the mixed batch into molten glass at a high temperature in air atmosphere, finally pouring the molten glass into a stainless steel mold for forming, and precisely annealing so as to obtain the paramagnetic faraday rotator glass. The preparation method has the advantages that through the oxidation-reduction characteristic of the mixed batch, the low valence of rare earth ions in the glass is ensured, a platinum crucible is protected from corrosion, and platinum ions are prevented from entering the glass. The optical quality of the paramagnetic faraday rotator glass is improved; a founding technology of the paramagnetic faraday rotator glass is improved and simplified. The prepared paramagnetic faraday rotator glass is high in rare earth content, low in rare earth ion valence, high in Verdet constant, high in light transmittance, absorption-free in a visible light range, simple in preparation technology and operational operation and suitable for industrial production.

Description

technical field [0001] The invention relates to a paramagnetic optically active glass and a preparation method thereof. Background technique [0002] Magneto-optical materials are the core materials of an important high-tech product in the field of optoelectronic technology, mainly including magneto-optical crystal materials and amorphous materials. Compared with magneto-optic crystals, magneto-optic glass has the following advantages: ①The matrix is ​​easy to change: the glass composition can be changed in a wide range, adding different types and quantities of rare earth ions provides a good premise for optimizing the magneto-optic performance; ②Isotropy: Due to the structural characteristics of near-range order and long-range disorder of glass, it is easy to obtain a uniform and isotropic glass medium; ③Easy to prepare and process: the application of mature optical glass technology can obtain good optical performance and large size , Magneto-optical glass with excellent l...

AI Technical Summary

Problems solved by technology

However, on the whole, the development of magneto-optical glass still has the following problems: (1) The Verdet constant of magneto-optic glass cannot meet the market demand: increasing the doping concentration of rare earth in the glass matrix can increase the Verdet constant of the glass, but the rare earth The increase of the concentration will reduce the comprehensive performance of the glass (such as glass-forming performance, thermal stability, chemical stability, etc.); (2) The introduction of rare earth ion valence changes will lead to the deepening of the glass color and the low Verdet constant; (3) Platinum crucible oxidation Contradictions between the use of glass under reducing conditions and the need to melt under reducing conditions

There are also disadvantages such as high melting temperature, complicated process control, and difficulty in preparing large samples.

In summary, there are no reports at home and abroad on the preparation of paramagnetic optically active glass with high light transmittance in the visible range, colorless and transparent, and high Verdet constant without affecting the use conditions of the platinum crucible.