Apatite type silicate terbium magneto-optical crystal and preparation method thereof

A technology of magneto-optic crystal and terbium silicate, which is applied in crystal growth, chemical instruments and methods, single crystal growth, etc., can solve the problem of no breakthrough in high-quality TGG crystal growth technology, expensive raw materials for TGG crystal synthesis, and unfavorable magneto-optical devices. Miniaturization and other issues, to achieve excellent magneto-optical effect, to achieve large-scale low-cost mass production, and short cycle effects

Inactive Publication Date: 2014-06-04
FUZHOU UNIV
View PDF1 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Terbium-doped glass and terbium-gallium garnet (TGG) crystals have high transmittance in the visible-near-infrared region, but the Faraday rotation angle is relatively small, and the size of the prepared device is large, which is not conducive to the development of magneto-optical devices. miniaturizatio

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Apatite type silicate terbium magneto-optical crystal and preparation method thereof
  • Apatite type silicate terbium magneto-optical crystal and preparation method thereof
  • Apatite type silicate terbium magneto-optical crystal and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: growth of apatite type Tb by melt pulling method 9.33 (SiO 4 ) 6 o 2 Magneto-optic crystals.

[0018] will press Tb 9.33 (SiO 4 ) 6 o 2 Stoichiometric ratio of accurately weighed Tb 4 o 7 (99.99%), SiO 2 (99.95%) was put into a corundum mortar, mixed and ground evenly, and after tableting, it was placed in a muffle furnace at 900°C for 12 hours for solid-state reaction. After taking it out, grind it again, press it into tablets, raise the temperature to 1400° C. and carry out the solid phase reaction again for 16 hours to obtain the initial raw material for crystal growth. The size is φ60×40mm 3 The iridium crucible is used as a container for crystal growth, and the synthesized polycrystalline powder raw material is put into the container, put into a single crystal pulling furnace, and heated in N 2 Single crystal pulling is carried out under atmosphere. The growth temperature is 1900° C., the growth rate is 0.5 mm / h, and the crystal rotation ...

Embodiment 2

[0020] Embodiment 2: growth of apatite type Tb by melt pulling method 9 (SiO 4 ) 6 o 1.5 Magneto-optic crystals.

[0021] will press Tb 9 (SiO 4 ) 6 o 1.5 Stoichiometric ratio of accurately weighed Tb 4 o 7 (99.99%), SiO 2 (99.95%) was put into a corundum mortar, mixed and ground evenly, and after being pressed into tablets, it was placed in a muffle furnace at 900°C for 20 hours of solid-state reaction. After taking it out, grind it again, press it into tablets, raise the temperature to 1400° C. and carry out the solid phase reaction again for 24 hours to obtain the initial raw material for crystal growth. The size is φ60×40mm 3 The iridium crucible is used as a container for crystal growth, and the synthesized polycrystalline powder raw material is put into the container, put into a single crystal pulling furnace, and heated in N 2 Single crystal pulling is carried out under atmosphere. The growth temperature is 2000° C., the growth rate is 2.0 mm / h, and the cry...

Embodiment 3

[0022]Embodiment 3: growth of apatite type Tb by melt pulling method 9.66 (SiO 4 ) 6 o 2.5 Magneto-optic crystals.

[0023] will press Tb 9.66 (SiO 4 ) 6 o 2.5 Stoichiometric ratio of accurately weighed Tb 4 o 7 (99.99%), SiO 2 (99.95%) was put into a corundum mortar, mixed and ground evenly, and after being pressed into tablets, it was placed in a muffle furnace at 900°C for 20 hours of solid-state reaction. After taking it out, grind it again, press it into tablets, raise the temperature to 1400° C. and carry out the solid phase reaction again for 24 hours to obtain the initial raw material for crystal growth. The size is φ60×40mm 3 The iridium crucible is used as a container for crystal growth, and the synthesized polycrystalline powder raw material is put into the container, put into a single crystal pulling furnace, and heated in N 2 Single crystal pulling is carried out under atmosphere. The growth temperature is 1950° C., the growth rate is 1 mm / h, and the ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses an apatite type silicate terbium magneto-optical crystal which is high in transmittance rate and high in Verdet constant in a visible-near infrared region and a preparation method thereof. The crystal grows by a melt pulling method; the molecular formula is Tb(10-x)(SiO4)6O(3-1.5x), wherein x is equal to 0-2; the crystal belongs to a hexagonal crystal system, and the space group is shown in the specification. The magneto-optical crystal has a good magneto-optical effect, and the Verdet constant of the magneto-optical crystal is higher than that of the conventional commercially applied terbium-doped glass and terbium gallium game (TGG) crystals; meanwhile, at the waveband of 400-1,500nm except for 485nm where the magneto-optical crystal has a feature absorption peak of the Tb<3+> ion, the magneto-optical crystal has high transmittance rate at other waveband; particularly within the visible light waveband of 400-650nm, the transmittance rate of the magneto-optical crystal is obviously increased as compared with that of the TGG crystal, so that the magneto-optical crystal has a good application prospect when used as a magneto-optical material; furthermore, the magneto-optical is a congruent melting compound and can grow by an intermediate-frequency induction pulling method; the growth technology is simple, the period is short, and large-scale and low-cost batch production can be realized.

Description

technical field [0001] The invention belongs to the technical field of magneto-optical materials and crystal growth, in particular to a magneto-optic crystal of apatite type terbium silicate with high transmittance and high Verdet constant and a preparation method thereof. Background technique [0002] Magneto-optic crystals are an important class of optoelectronic functional materials. Optical isolators, laser modulators, magneto-optical switches, optical fiber current sensors, and other magneto-optical devices with opto-electromagnetic conversion functions can be made by using their unique Faraday effect. Strategic high-tech materials urgently needed by systems such as communications, optical networks, and information processing. [0003] Rare earth-doped garnet magneto-optic crystals occupy an important position among the mainstream magneto-optic crystal materials for commercial application at present. Such as yttrium iron garnet (YIG) and its doped series of crystals an...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C30B29/34C30B15/00C30B33/02
Inventor 陈新万琦萍张文辉陈建中郭飞云庄乃锋宫仲亮
Owner FUZHOU UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap