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Method for synthesizing composite polycrystalline jadeite

A synthetic method and polycrystalline technology, which is applied in the field of compound polycrystalline jadeite jadeite synthesis, can solve the problems of harsh synthesis conditions, low conversion rate, and poor solid fluidity, and achieve simple reaction equipment, simple operation, and high transparency.

Inactive Publication Date: 2012-09-12
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] (1) Two or more composite solid components are used as the initial raw material. Due to the poor fluidity of the solid, it needs to be heated to a molten state to obtain a homogeneous vitreous raw material. Therefore, the energy consumption of the vitreous raw material is large, and high-temperature reaction equipment is required.
[0007] (2) Vitreous solid powder is used as raw material; although the vitreous raw material can be partially converted into a crystal structure under ultra-high temperature and ultra-high pressure conditions, the conversion rate is small, and crystal materials with high crystallinity cannot be obtained
[0008] (3) The transparency of the emerald obtained by this method is insufficient;
[0010] To sum up, due to the special structure of jadeite and harsh synthesis conditions, the current technical level of synthetic jadeite is still in the status quo of research and development. Due to the limitation of synthesis technology and synthesis cost, synthetic jadeite has not yet reached the level of commercialization, and has not yet achieved commercialization. Therefore, it is necessary to seek new emerald synthesis methods

Method used

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  • Method for synthesizing composite polycrystalline jadeite
  • Method for synthesizing composite polycrystalline jadeite
  • Method for synthesizing composite polycrystalline jadeite

Examples

Experimental program
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Effect test

Embodiment 1

[0031] 1. Synthesis of sodium aluminum monosilicate solid powder

[0032] In the reactor, first add 120-300 mesh Al(OH) 3 Powder, sodium silicate aqueous solution and a small amount of NaOH catalyst, the molar ratio of aluminum hydroxide to sodium silicate is 0.5; the molar ratio of sodium hydroxide to aluminum hydroxide is 2.0. Heating to a temperature of 120° C. and maintaining the reaction for 2 hours, a solid precipitate of sodium aluminum monosilicate is produced, which is filtered to obtain a solid precipitate of sodium aluminum monosilicate.

[0033] (2) Synthesis of sodium aluminum disilicate solid powder

[0034] Disperse sodium sodium monosilicate solid in water, add inorganic acid solution to adjust the pH, pH = 3, then add sodium silicate solution in an equimolar amount to sodium aluminum silicate, maintain 10°C for 72 hours, stop the reaction, Sodium aluminum disilicate solid powder was obtained by filtration.

[0035] (3) Ultra-high temperature and ultra-high ...

Embodiment 2

[0038] 1. Synthesis of sodium aluminum monosilicate solid powder

[0039] In the reactor, first add 120-300 mesh Al(OH) 3Powder, sodium silicate aqueous solution and a small amount of NaOH catalyst, the molar ratio of aluminum hydroxide to sodium silicate is 0.6; the molar ratio of sodium hydroxide to aluminum hydroxide is 1.0. Heating to 60°C, and maintaining the reaction for 24 hours, a solid precipitate of sodium aluminum monosilicate is produced, which is filtered to obtain a solid precipitate of sodium aluminum monosilicate.

[0040] 2. Synthesis of sodium aluminum disilicate solid powder

[0041] Disperse sodium sodium monosilicate solid in water, add inorganic acid solution to adjust the pH, pH = 5, then add sodium silicate solution in an equimolar amount to sodium aluminum silicate, maintain 40°C for 48 hours, stop the reaction, Sodium aluminum disilicate solid powder was obtained by filtration.

[0042] 3. Ultra-high temperature and ultra-high pressure polymerizati...

Embodiment 3

[0045] 1. Synthesis of sodium aluminum monosilicate solid powder

[0046] In the reactor, first add 120-300 mesh Al(OH) 3 Powder, sodium silicate aqueous solution and a small amount of NaOH catalyst, the molar ratio of aluminum hydroxide to sodium silicate is 1.0; the molar ratio of sodium hydroxide to aluminum hydroxide is 0.2. Maintain the temperature of 10°C for 48 hours to produce sodium aluminum monosilicate solid precipitation, filter to obtain sodium aluminum monosilicate solid precipitation.

[0047] 2. Synthesis of sodium aluminum disilicate solid powder

[0048] Disperse sodium sodium monosilicate solid in water, add inorganic acid solution to adjust the pH, pH = 8, then add sodium silicate solution in an equimolar amount to sodium aluminum silicate, maintain 100°C for 12 hours, stop the reaction, Sodium aluminum disilicate solid powder was obtained by filtration.

[0049] 3. Ultra-high temperature and ultra-high pressure polymerization molding of sodium aluminum ...

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Abstract

The invention discloses a method for synthesizing composite polycrystalline jadeite. Aluminum hydroxide and sodium silicate are used as raw materials in the synthesizing method. The synthesizing method comprises the following steps of: performing sodium hydroxide catalytic reaction to generate single sodium aluminum silicate, mixing and reacting the obtained single sodium aluminum silicate, inorganic acid solution and sodium silicate solution to obtain sodium aluminum disilicate solid powder, and finally performing ultrahigh-temperature and ultrahigh-pressure polymerization reaction to synthesize the jadeite with 90 to 98 percent of crystals. The jadeite is carved and processed to form jade stone devices. The method has the advantages that: the jadeite synthesized by the method has glassyluster, crystal clearness and high transparency, the density of the jadeite is 3.28 to 3.37g / cm<3>, and various properties of the jadeite are basically consistent with those of natural jade.

Description

technical field [0001] The invention relates to the field of gemstone and jade synthesis, in particular to a synthesis method of composite polycrystalline jadeite jadeite. technical background [0002] Gems and jade have been regarded as auspicious and evil objects since ancient times. They are symbols of nobility, purity, elegance, wealth, peace and happiness. Compared with gold and silver, gems and jade are slightly better in appearance. Due to the scarcity of natural gems and jade storage, it cannot meet the needs of society. With the development of science, people synthesize a variety of gems and jade artificially, so that gems and jade are transformed from rare mineral resources into a renewable resource to meet the needs of society. human social needs. Synthetic gemstones have a history of nearly 100 years. The common synthetic gemstones in the jewelry market today include synthetic ruby, synthetic sapphire, synthetic star ruby, synthetic emerald, synthetic spinel, sy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B32/00
Inventor 农光再
Owner GUANGXI UNIV
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