Beryllium aluminate crystal substrate color changing gem, and preparation and growth apparatus thereof

A technology of beryllium aluminate and crystal, which is applied in the field of thulium-germanate-doped laser glass and its preparation, which can solve the problems of monotonous gemstone tone, unsatisfactory effect, and gemstones that cannot produce tone.

Inactive Publication Date: 2009-04-15
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In recent years, some relatively new technologies for artificially synthesizing the above three kinds of gemstones have been recorded in patent documents, for example, Chinese patent announcement number CN1033313C, the date of authorization announcement was November 20, 1996, and the invention title was "manufacturing method of artificial cat's eye" , the method adopts concentric crucible method, toning process, etc. to prepare cat's-eye gemstones of various colors; Chinese patent announcement number CN1062318C, authorized announcement date on February 21, 2001, invention name "growth method of chrysoberyl group decorative gemstones" and its device", the growth method used in this invention is the rotary temperature gradient method, and the growth device is a rotary temperature gradient furnace, which can prepare chrysoberyl opal, chrysoberyl, and alexan

Method used

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  • Beryllium aluminate crystal substrate color changing gem, and preparation and growth apparatus thereof
  • Beryllium aluminate crystal substrate color changing gem, and preparation and growth apparatus thereof
  • Beryllium aluminate crystal substrate color changing gem, and preparation and growth apparatus thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] a. Ingredients: according to the following reaction formula, according to the actual doping concentration, weigh

[0036] (1-x-y-z)Al 2 o 3 +BeO+xCr 2 o 3 +yFe 2 o 3 +zTi 2 o 3 →BeAl 2-2x-2y-2z Cr 2x Fe 2y Ti 2z o 4

[0037] Among them: Cr 2 o 3 (x) is 0.15mol%, Fe 2 o 3 (y) is 0.15mol%, Ti 2 o 3 (z) is 0.1mol%. The raw material is Al 2 o 3 Ingot, BeO compact, Cr 2 o 3 Powder, Fe 2 o 3 Powder and Ti 2 o 3 Powder. All raw materials are more than 99.99% pure.

[0038] b. Feeding and chemical material: carry out secondary chemical material. For the first chemical material, the weighed 2 / 3 mole part of BeO and 3 / 5 mole part of Al 2 o 3 , half of Cr 2 o 3 Powder, Fe 2 o 3 Powder and Ti 2 o 3 powder added to the bottom already filled with BeAl 2 o 4 Seed (c-axis direction) in the tungsten-molybdenum crucible. Keep the molar amount of BeO relative to Al in the mixed material 2 o 3 Excess. In the crucible, BeO and Al 2 o 3 The two compone...

Embodiment 2

[0044] a. Ingredients: according to the following reaction formula, according to the actual doping concentration, weigh

[0045] (1-u-v-w)Al 2 o 3 +BeO+uCr 2 o 3 +vFe 2 o 3 +wNiO→BeAl 2-2u-2v-w Cr 2u Fe 2v Ni w o 4 -wO 2

[0046] Among them: Cr 2 o 3 (x) is 0.15mol%, Fe 2 o 3 (y) is 0.15 mol%, and NiO is 0.1 mol%. The raw material is Al 2 o 3 Ingot, BeO compact, Cr 2 o 3 Powder, Fe 2 o 3 powder and NiO powder. All raw materials are more than 99.99% pure.

[0047] b. Chemical material: take the secondary chemical material. The first chemical material is the weighed 2 / 3 mole part of BeO and 1 / 2 mole part of Al 2 o 3 , half of Cr 2 o 3 Powder, Fe 2 o 3 powder and NiO powder are added to the bottom already filled with BeAl 2 o 4 Seed (c-axis direction) in the tungsten-molybdenum crucible. Keep the molar amount of BeO relative to Al in the mixed material 2 o 3 Excess. In the crucible, BeO and Al 2 o 3 The two components are stacked cross-layered, ...

Embodiment 3

[0053] According to the following reaction formula, according to the actual doping concentration, carry out weighing and batching

[0054] (1-x-y-z)Al 2 o 3 +BeO+xCr 2 o 3 +yFe 2 o 3 +zTi 2 o 3 →BeAl 2-2x-2y-2z Cr 2x Fe 2y Ti 2z o 4

[0055] Among them: Cr 2 o 3 (x) is 0.2mol%, Fe 2 o 3 (y) is 0.5mol%, Ti 2 o 3 (z) is 0.2mol%.

[0056] Other technological processes are similar to embodiment 1.

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Abstract

The invention discloses a beryllium aluminate crystal substrate phenomenal gem, a preparation method and a growth device thereof, which is characterized in that, in a special growth device, BeAl2O4 monocrystal substrate is proportionally blended with Cr<3+>, Fe<3+>, Ti<3+> or Ni<2+> three transition element ions, and a vertical static temperature gradient method is used for preparing the artificial phenomenal gem with strong color change effect. The invention aims at meeting the constant requirements of people on the color and hue of the gems of chrysopal group, wishing that more distinct variation can be obtained in the aspect of color change effect between red and green, and solving the civil batch production problem of the gem. The phenomenal gem which can generate broader color and hue has obvious color change effect between red and green. The preparation method has the advantages of obviously enhancing mass output rate, having relatively simple equipment, and overcoming the defective impact of mechanical drive and vibration on crystal growth, thus being beneficial to the scale production of high-quality gems.

Description

technical field [0001] The invention relates to special glass, in particular to a thulium-germanate-doped laser glass and a preparation method thereof. Background technique [0002] There are many kinds of natural gemstones in nature, including ruby, sapphire, pure beryl, jade... etc. These gemstones have bright colors and hard textures, and are popular gemstones. Especially the crystals of the chrysoberyl family: Chrysoberyl Cat's Eye, Chrysoberyl and Alexandrite are rare special gemstones, expensive and popular. People love it, and the civilian market has a large amount, but these gemstones have few natural resources and cannot meet people's growing needs. Therefore, the technology of artificially synthesizing the above-mentioned gemstones has appeared. The techniques used mainly include: melt method, hydrothermal method, flame method and flux method, etc., but the crystal blanks obtained by these methods are too small and have no practical decorative value. In 1980, the...

Claims

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Application Information

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IPC IPC(8): C04B32/00
Inventor 夏海平张新民
Owner NINGBO UNIV
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