High verdet constant magnetic optic glass and preparation method thereof

Abstract

The invention provides a high verdet constant magnetic optic glass and a preparation method thereof. The glass comprises the following raw materials in percentage by mole: 15 to 40 percent of Tb2O3, 0 to 25 percent of Dy2O3, 30 to 60 percent of B2O3 and SiO2, 0 to 30 percent of Ga2O3, 0 to 10 percent of ZnO, 0 to 8 percent of ZrO, 0 to 5 percent of CaF2, 0 to 5 percent of P2O5 and 0 to 10 percent of TiO2. The preparation method comprises the following steps of: weighing and mixing the raw materials in percentage by mole; adjusting the temperature of a heating furnace to 1,250 DEG C, putting the raw materials into a crucible in the heating furnace in turn; heating the mixture to between 1,350 and 1,380 DEG C, and stirring the mixture for 3 to 5 hours; and cooling the furnace to 1,250 DEG C, pouring the materials in the heating furnace and annealing the materials. The verdet constant of the magnetic optic glass reaches -0.425min / Oe.cm (632.8nm), and is far higher than that of international general terbium glass.

Description

Technical field [0001] The invention relates to a glass and a preparation method thereof, and relates to a Goveld constant magneto-optical glass and a preparation method thereof. Background technique [0002] Since the 1960s, magneto-optical glass has been a hot spot for scientists from all over the world due to its excellent magneto-optical effect. It has been widely used as magneto-optical modulators, magneto-optical sensors, magneto-optical isolators, magneto-optical switches, etc. , Is an irreplaceable important material. [0003] Although crystal magneto-optical materials have high Verdet constants and good magneto-optical properties, they have various defects. For example, because the spatial lattices that make up the crystals have different fixed shapes, they appear macroscopically as crystals with different Unique geometric shape and not easy to change. Therefore, the crystal has the characteristics of long-range order, anisotropy, symmetry, self-limiting, cleavage, etc. T...

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Problems solved by technology

[0003] Although crystalline magneto-optical materials have a high Verdet constant and good magneto-optical properties, there are various defects in themselves. Unique geometric shape, and not easy to change, therefore, the crystal has the characteristics of long-range order, anisotropy, symmetry, self-limiting, cleavage, etc. The anisotropy of the crystal produces birefringence, etc., so that its application range is greatly limited

[0004] The glass matrix usually selected at home and abroad is Al 2 o 3 -B 2 o 3 System and Al 2 o 3 -B 2 o 3 -SiO 2 system, the doping amount of rare earth ions is severely limited, and the Verdet constant of practical glass is small, which is far from meeting the market demand

In addition, my country's technology is still immature in terms of special optical glass melting and bulk glass forming

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