CN107601872B - Natural-imitated obsidian and preparation method thereof - Google Patents
Natural-imitated obsidian and preparation method thereof Download PDFInfo
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Abstract
The invention provides natural obsidian-imitated artificial crystal and a preparation method thereof, wherein raw materials comprise 145-155 parts by mass of silicon dioxide, 145-155 parts by mass of feldspar powder, 40-45 parts by mass of soda ash, 1.8-2 parts by mass of cadmium green, 0.9-1.2 parts by mass of nickel oxide, 2.5-5 parts by mass of sodium fluosilicate, 2.5-3 parts by mass of sodium nitrate, 2-3 parts by mass of sodium chloride, 6-8 parts by mass of borax, 8-10 parts by mass of aluminum oxide and 5-6 parts by mass of manganese powder. The raw materials are prepared by a ball milling method or a sol-gel method, an electric furnace is added, the temperature is controlled to be 1150-1300 ℃, the heat is preserved for 3-6 hours for melting and homogenizing, then the artificial crystal rod imitating natural obsidian is prepared by a drawing forming method at 1150-1280 ℃, and then the artificial crystal rod is annealed at 550-600 ℃ for 5-7 hours. The natural obsidian-imitated artificial crystal provided by the invention has the advantages of easily available raw materials, simple preparation method and low cost, reduces the melting temperature and homogenization time of the raw materials, and is more easily prepared into the natural obsidian-imitated artificial crystal without bubbles and with uniform texture.
Description
Technical Field
The invention relates to an imitated natural obsidian and a preparation method thereof, belonging to the technical field of imitated gem preparation.
Background
Obsidian is a common black gem and volcanic crystal, otherwise known as "dragon crystal and puzzolan", a naturally occurring silica that is usually dark black in color. With the improvement of living standard of people, the low-tone gems are popular with more and more people and are made into various bracelets, pendants, ornaments and the like to decorate the people and the life. However, most obsidian jewelry is produced today in the central and north american regions and is expensive.
The invention provides an artificial crystal imitating natural obsidian and a preparation method thereof, and provides the artificial crystal imitating natural obsidian with low cost and beautiful appearance, which can be prepared into various bracelet, pendant, ornament and the like imitating the natural obsidian and can meet the aesthetic requirements of people.
Disclosure of Invention
The invention provides an artificial crystal for releasing natural obsidian and a preparation method thereof, and provides the artificial crystal for imitating the natural obsidian, which has low cost and beautiful appearance.
In order to achieve the above technical object, the present invention adopts the following technical solutions.
An artificial crystal imitating natural obsidian, which comprises the following raw materials:
the natural obsidian-imitating artificial crystal is prepared with the materials and through mixing, melting and drawing.
Further, the natural obsidian-imitating artificial crystal provided by the invention comprises the following raw materials:
the invention also provides a preparation method of the natural obsidian-imitating artificial crystal, which comprises the following steps:
step 1: mixing the raw materials uniformly according to a proportion;
step 2: adding the raw materials into an electric melting furnace, controlling the temperature to 1150-1300 ℃, and preserving heat for 3-6 hours to melt and homogenize the raw materials;
and step 3: and (3) preparing the melt which is subjected to melting homogenization into the artificial crystal rod imitating the natural obsidian by a drawing forming method, wherein the drawing forming temperature is 1150-1280 ℃, and after the drawing is finished, the obtained artificial crystal rod imitating the natural obsidian is placed into an annealing furnace for annealing at the annealing temperature of 550-600 ℃ for 5-7 h to obtain the artificial crystal imitating the natural obsidian.
In particular to a method for preparing an artificial crystal imitating natural obsidian, wherein the raw materials are,
further preferably, in the method for preparing the natural obsidian-imitating artificial crystal, the raw material is,
further, the method of step 1 of the natural obsidian-imitating artificial crystal according to the present invention comprises weighing raw materials by weight ratio, and performing dry ball milling, wherein the particle size of the raw materials is 100 μm or less.
As a preferable embodiment, the method of step 1 of the artificial crystal imitating natural obsidian of the present invention comprises preparing borax as a saturated solution, and sodium carbonate, sodium nitrate and sodium chloride as a saturated solution;
the silicon dioxide is derived from two parts, wherein 2/3-3/4 are derived from quartz sand, and the other part is derived from tetraethoxysilane;
calculating the mass of the ethyl orthosilicate according to the mass ratio, then mixing the ethyl orthosilicate and the ethylene glycol, stirring for 10-15 min, adding deionized water, adjusting the pH value to be 2, and hydrolyzing for 60-70 min;
then adding saturated solution of borax, adjusting the pH value of the solution to 3, and stirring for 60-90 min at 60 ℃;
then adding soda ash, sodium nitrate and sodium chloride solution, adjusting the pH to 4, and stirring at 60 ℃ until sol is formed for later use;
then, 2/3-3/4 parts of quartz sand, feldspar powder, cadmium green, nickel oxide, sodium fluosilicate, aluminum oxide and manganese powder are added, wherein the quartz sand accounts for the weight of silicon dioxide in the raw materials, the feldspar powder, the cadmium green, the nickel oxide, the sodium fluosilicate, the aluminum oxide and the manganese powder are stirred and evaporated to dryness to form gel, and then the gel is sintered at the temperature of 150-180 ℃ to complete the mixing of the raw materials.
Further preferably, in the method for preparing natural obsidian-imitating artificial crystal according to the present invention, the particle size of the quartz sand, feldspar powder, cadmium green, nickel oxide, sodium fluorosilicate, alumina and manganese powder is 100 μm or less. The molar ratio of the ethyl orthosilicate to the ethylene glycol is 1: (2.2-2.7): (10-20).
By adopting the technical scheme, the invention achieves the following technical effects.
1. The natural obsidian-imitating artificial crystal has the advantages of easily available raw materials, simple preparation method and low cost, and provides the natural obsidian-imitating artificial crystal which is low in cost and attractive.
2. According to the preparation method of the natural obsidian-imitated artificial crystal, the raw material powder of the natural obsidian-imitated artificial crystal is prepared by adopting a sol-gel method, so that the raw material powder with finer granularity and more uniform can be obtained, the melting temperature and the homogenization time of the raw material are reduced, and the natural obsidian-imitated artificial crystal without bubbles and with uniform texture can be obtained more easily.
3. According to the preparation method of the natural obsidian-imitated artificial crystal, annealing is performed again after drawing and forming, so that the thermal stress in the drawing process is eliminated, the processability of the natural obsidian-imitated artificial crystal can be improved, the damage or damage generated in the processing process is avoided, and the raw materials are saved.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments in order to make the technical field better understand the scheme of the present invention.
Example 1
Step 1: 145 parts by mass of quartz sand, 145 parts by mass of feldspar powder, 40 parts by mass of soda ash, 1.8 parts by mass of cadmium green, 0.9 part by mass of nickel oxide, 2.5 parts by mass of sodium fluosilicate, 2.5 parts by mass of sodium nitrate, 2 parts by mass of sodium chloride, 6 parts by mass of borax, 8 parts by mass of aluminum oxide and 5 parts by mass of manganese powder are weighed. Then, the raw materials were added to a ball mill and dry ball-milled. Controlling the ball ratio at 1: 1.5, the filling ratio is 60%.
The ball milling time is 3h, and the raw material powder mixture with the grain diameter not more than 100 mu m is obtained.
Step 2: adding the raw materials into an electric melting furnace, controlling the temperature at 1250 ℃, and preserving the heat for 3 hours to melt and homogenize the raw materials.
And step 3: and (3) preparing the melt which is subjected to melting homogenization into the artificial crystal rod imitating the natural obsidian by a drawing forming method, wherein the drawing forming temperature is 1200 ℃, and after the drawing is finished, putting the obtained artificial crystal rod imitating the natural obsidian into an annealing furnace for annealing at the annealing temperature of 550 ℃ for 5h to obtain the artificial crystal imitating the natural obsidian.
Example 2
Step 1: weighing 150 parts by mass of silicon dioxide, 150 parts by mass of feldspar powder, 45 parts by mass of soda ash, 1.8 parts by mass of cadmium green, 1 part by mass of nickel oxide, 5 parts by mass of sodium fluosilicate, 2.5 parts by mass of sodium nitrate, 2.0 parts by mass of sodium chloride, 7 parts by mass of borax, 9 parts by mass of alumina and 5 parts by mass of manganese powder. Then, the raw materials were added to a ball mill and dry ball-milled. Controlling the ball ratio at 1: 2, the filling ratio was 65%.
The ball milling time is 4 hours, and the raw material powder mixture with the grain diameter not more than 100 mu m is obtained.
Step 2: adding the raw materials into an electric melting furnace, controlling the temperature at 1280 ℃, and preserving heat for 4 hours to melt and homogenize the raw materials.
And step 3: and (3) preparing the melt which is subjected to melting homogenization into the artificial crystal rod imitating the natural obsidian by a drawing forming method, wherein the drawing forming temperature is 1230 ℃, and after the drawing is finished, putting the obtained artificial crystal rod imitating the natural obsidian into an annealing furnace for annealing at the annealing temperature of 550 ℃ for 6h to obtain the artificial crystal imitating the natural obsidian.
Example 3
Step 1: 155 parts of quartz sand, 155 parts of feldspar powder, 45 parts of soda ash, 2 parts of cadmium green, 1.2 parts of nickel oxide, 5 parts of sodium fluosilicate, 3 parts of sodium nitrate, 3 parts of sodium chloride, 8 parts of borax, 10 parts of aluminum oxide and 6 parts of manganese powder. Then, the raw materials were added to a ball mill and dry ball-milled. Controlling the ball ratio at 1: 2, the filling ratio was 70%.
The ball milling time is 5h, and the raw material powder mixture with the grain diameter not more than 100 mu m is obtained.
Step 2: adding the raw materials into an electric melting furnace, controlling the temperature at 1300 ℃, and preserving the heat for 7 hours to melt and homogenize the raw materials.
And step 3: and (3) preparing the melt which is subjected to melting homogenization into the artificial crystal rod imitating the natural obsidian by a drawing forming method, wherein the drawing forming temperature is 1290 ℃, and after the drawing is finished, putting the obtained artificial crystal rod imitating the natural obsidian into an annealing furnace for annealing at the annealing temperature of 600 ℃ for 7h to obtain the artificial crystal imitating the natural obsidian.
Example 4
Step 1: 167.56 parts by mass of tetraethoxysilane is weighed, and the molar ratio of tetraethoxysilane to glycol to water is 1: 2.2: preparing materials, firstly, adding ethylene glycol into tetraethoxysilane, stirring for 10min, then adding deionized water, adjusting the pH value to be 2, and hydrolyzing for 60 min.
Then, 6 parts by mass of borax was dissolved into a saturated solution and added, the PH of the solution was adjusted to 3, and the mixture was stirred at 60 ℃ for 60 min.
Then, 40 parts by mass of soda ash, 2.5 parts by mass of sodium nitrate and 2 parts by mass of a saturated solution of sodium chloride were added, the PH was adjusted to 4, and the mixture was stirred at 60 ℃ until a sol was formed for use.
Then, 96.67 parts by mass of quartz sand, 145 parts by mass of feldspar powder, 1.8 parts by mass of cadmium green, 0.9 part by mass of nickel oxide, 2.5 parts by mass of sodium fluosilicate, 8 parts by mass of alumina and 5 parts by mass of manganese powder are added thereto, stirred and evaporated to dryness to form a gel, and then sintered at 150 ℃ to complete the mixing of the raw materials.
Step 2: adding the raw materials into an electric melting furnace, controlling the temperature to 1150 ℃, and preserving heat for 3 hours to melt and homogenize the raw materials.
And step 3: and (3) preparing the melt which is subjected to melting homogenization into the artificial crystal rod imitating the natural obsidian by a drawing forming method, wherein the drawing forming temperature is 1150 ℃, and after the drawing is finished, putting the obtained artificial crystal rod imitating the natural obsidian into an annealing furnace for annealing at the annealing temperature of 550 ℃ for 5h to obtain the artificial crystal imitating the natural obsidian.
Example 5
Step 1: 179.11 parts by mass of tetraethoxysilane is weighed, and the molar ratio of tetraethoxysilane to glycol to water is 1: 2.7: 20, preparing materials, namely firstly adding ethylene glycol into tetraethoxysilane, stirring for 15min, then adding deionized water, adjusting the pH value to be 2, and hydrolyzing for 70 min.
Then 8 parts by mass of borax was dissolved into a saturated solution and added, the PH of the solution was adjusted to 3, and the mixture was stirred at 60 ℃ for 70 min.
Then, 50 parts by mass of soda ash, 3 parts by mass of sodium nitrate and 3 parts by mass of a saturated solution of sodium chloride were added, the PH was adjusted to 4, and the mixture was stirred at 60 ℃ until a sol was formed for use.
Then 103.33 parts by mass of quartz sand, 155 parts by mass of feldspar powder, 2 parts by mass of cadmium green, 1.2 parts by mass of nickel oxide, 5 parts by mass of sodium fluosilicate, 10 parts by mass of aluminum oxide and 6 parts by mass of manganese powder are added, stirred and evaporated to dryness to form gel, and then sintered at 180 ℃ to complete the mixing of the raw materials.
Step 2: adding the raw materials into an electric melting furnace, controlling the temperature at 1200 ℃, and preserving the heat for 4 hours to melt and homogenize the raw materials.
And step 3: and (3) preparing the melt which is subjected to melting homogenization into the artificial crystal rod imitating the natural obsidian by a drawing forming method, wherein the drawing forming temperature is 1200 ℃, and after the drawing is finished, putting the obtained artificial crystal rod imitating the natural obsidian into an annealing furnace for annealing at the annealing temperature of 600 ℃ for 6h to obtain the artificial crystal imitating the natural obsidian.
Example 6
Step 1: 125.67 parts by mass of tetraethoxysilane is weighed, and the molar ratio of tetraethoxysilane to glycol to water is 1: 2.5: preparing materials, firstly, adding ethylene glycol into tetraethoxysilane, stirring for 10min, then adding deionized water, adjusting the pH value to be 2, and hydrolyzing for 60 min.
Then, 6 parts by mass of borax was dissolved into a saturated solution and added, the PH of the solution was adjusted to 3, and the mixture was stirred at 60 ℃ for 70 min.
Then, 40 parts by mass of soda ash, 2.5 parts by mass of sodium nitrate and 2 parts by mass of a saturated solution of sodium chloride were added, the PH was adjusted to 4, and the mixture was stirred at 60 ℃ until a sol was formed for use.
Then 108.75 parts by mass of quartz sand, 145 parts by mass of feldspar powder, 1.8 parts by mass of cadmium green, 0.9 part by mass of nickel oxide, 2.5 parts by mass of sodium fluosilicate, 8 parts by mass of alumina and 5 parts by mass of manganese powder are added, stirred and evaporated to dryness to form gel, and then sintered at 150 ℃ to complete the mixing of the raw materials.
Step 2: adding the raw materials into an electric melting furnace, controlling the temperature to 1150 ℃, and preserving heat for 3 hours to melt and homogenize the raw materials.
And step 3: and (3) preparing the melt which is subjected to melting homogenization into the artificial crystal rod imitating the natural obsidian by a drawing forming method, wherein the drawing forming temperature is 1150 ℃, and after the drawing is finished, putting the obtained artificial crystal rod imitating the natural obsidian into an annealing furnace for annealing at the annealing temperature of 550 ℃ for 5h to obtain the artificial crystal imitating the natural obsidian.
Example 7
Step 1: 134.33 parts by mass of tetraethoxysilane is weighed, and the molar ratio of tetraethoxysilane to glycol to water is 1: 2.7: 20, preparing materials, namely firstly adding ethylene glycol into tetraethoxysilane, stirring for 15min, then adding deionized water, adjusting the pH value to be 2, and hydrolyzing for 60 min.
Then 8 parts by mass of borax was dissolved into a saturated solution and added, the PH of the solution was adjusted to 3, and the mixture was stirred at 60 ℃ for 90 min.
Then, 50 parts by mass of soda ash, 3 parts by mass of sodium nitrate and 3 parts by mass of a saturated solution of sodium chloride were added, the PH was adjusted to 4, and the mixture was stirred at 60 ℃ until a sol was formed for use.
Then, 116.25 parts by mass of quartz sand, 155 parts by mass of feldspar powder, 2 parts by mass of cadmium green, 1.2 parts by mass of nickel oxide, 5 parts by mass of sodium fluosilicate, 10 parts by mass of alumina and 6 parts by mass of manganese powder are added, stirred and evaporated to dryness to form gel, and then sintered at 180 ℃ to complete the mixing of the raw materials.
Step 2: adding the raw materials into an electric melting furnace, controlling the temperature at 1200 ℃, and preserving the heat for 6 hours to melt and homogenize the raw materials.
And step 3: and (3) preparing the melt which is subjected to melting homogenization into the artificial crystal rod imitating the natural obsidian by a drawing forming method, wherein the drawing forming temperature is 1200 ℃, and after the drawing is finished, putting the obtained artificial crystal rod imitating the natural obsidian into an annealing furnace for annealing at the annealing temperature of 600 ℃ for 7h to obtain the artificial crystal imitating the natural obsidian.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The technical solution provided by the present invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are set forth only to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (4)
1. The artificial crystal imitating natural obsidian is characterized in that: the raw materials comprise
The natural obsidian-imitating artificial crystal is prepared by the following method,
step 1, uniformly mixing raw materials in proportion;
firstly, preparing borax into a saturated solution according to a weight ratio, and preparing sodium carbonate, sodium nitrate and sodium chloride into a saturated solution;
the silicon dioxide is derived from two parts, wherein 2/3-3/4 are derived from quartz sand, and the other part is derived from tetraethoxysilane;
calculating the mass of the ethyl orthosilicate according to the mass ratio, then mixing the ethyl orthosilicate and the ethylene glycol, stirring for 10-15 min, adding deionized water, adjusting the pH value to be 2, and hydrolyzing for 60-70 min;
then adding saturated solution of borax, adjusting the pH value of the solution to 3, and stirring for 60-90 min at 60 ℃;
then adding soda ash, sodium nitrate and sodium chloride solution, adjusting the pH to 4, and stirring at 60 ℃ until sol is formed for later use;
then, adding 2/3-3/4 parts by weight of quartz sand, feldspar powder, cadmium green, nickel oxide, sodium fluosilicate, aluminum oxide and manganese powder which account for the weight parts of silicon dioxide in the raw materials, stirring and evaporating to form gel, and sintering at 150-180 ℃ to complete the mixing of the raw materials;
step 2: adding the raw materials into an electric melting furnace, controlling the temperature to 1150-1300 ℃, and preserving the heat for 3-6 hours to melt and homogenize the raw materials;
and step 3: and (3) preparing the melt which is subjected to melting homogenization into the artificial crystal rod imitating the natural obsidian by a drawing forming method, wherein the drawing forming temperature is 1150-1280 ℃, and after the drawing is finished, the obtained artificial crystal rod imitating the natural obsidian is placed into an annealing furnace for annealing at the annealing temperature of 550-600 ℃ for 5-7 h to obtain the artificial crystal imitating the natural obsidian.
2. The natural obsidian-imitating artificial crystal according to claim 1, wherein: the raw materials of the material comprise,
3. the natural obsidian-imitating artificial crystal according to claim 1 or 2, wherein: the granularity of the quartz sand, feldspar, cadmium green, nickel oxide, sodium fluosilicate, aluminum oxide and manganese powder is less than 100 mu m.
4. The natural obsidian-imitating artificial crystal according to claim 1 or 2, wherein: the molar ratio of the ethyl orthosilicate, the ethylene glycol and the deionized water in the step 1 is 1: (2.2-2.7): (10-20).
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| CN1371957A (en) * | 2002-03-26 | 2002-10-02 | 清华大学 | Method for covering silicon dioxide film on aluminate series long afterglow fluorescent powder surface |
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| CN106698939A (en) * | 2017-01-23 | 2017-05-24 | 方春庚 | Formula for bright red crystal rod |
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2017
- 2017-10-23 CN CN201710993337.0A patent/CN107601872B/en active Active
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|---|---|---|---|---|
| CN1371957A (en) * | 2002-03-26 | 2002-10-02 | 清华大学 | Method for covering silicon dioxide film on aluminate series long afterglow fluorescent powder surface |
| CN105924004A (en) * | 2016-04-29 | 2016-09-07 | 浦江县乾坤工贸有限公司 | Manufacturing method for porcelain red crystal rod |
| CN106698939A (en) * | 2017-01-23 | 2017-05-24 | 方春庚 | Formula for bright red crystal rod |
Non-Patent Citations (2)
| Title |
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| 溶胶一凝胶法制备石英玻璃;高德淑等;《湘潭大学自然科学学报》;19921231;第14卷(第4期);全文 * |
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