CN106829980A - A kind of method for preparing synthetic mica and prepared synthetic mica and application - Google Patents
A kind of method for preparing synthetic mica and prepared synthetic mica and application Download PDFInfo
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Abstract
The present invention relates to a kind of method for preparing synthetic mica and prepared synthetic mica and application, methods described includes：(1) heating using microwave melting：Using the raw material of synthetic mica, various raw materials are poured into and are uniformly mixed in stir mixing machine, be fitted into can absorb or through the crucible of microwave in, be placed in and be heated to material in high temperature microwave calcining furnace and melt completely, and be incubated more than 5 minutes；(2) crystallisation by cooling：Control cooling, when temperature is less than 1365-1350 DEG C, turns off microwave power supply, and Temperature fall to room temperature obtains synthetic mica.The present invention realizes uniform heating fused raw material in a short time by heating using microwave, and synthetic mica is prepared by crystallisation by cooling.Compared with traditional synthetic mica melting technology, energy consumption and cost are reduced, improve product quality.
Description
Technical field
The present invention relates to a kind of method for preparing synthetic mica and prepared synthetic mica and application, especially relate to
And the method that synthetic mica is prepared by microwave heating high-temperature fusion-crystallization, and prepared synthetic mica
Reprocessing and application.Particularly pearlescent pigment is produced with the method gained synthetic mica as base material by processing
And application.
Background technology
With flaky material as base material, single or multiple lift oxide coating prepared the pigment with pearl effect
History through there is decades, technique is very ripe, and has had substantial amounts of document patent.Synthetic mica piece conduct
The base material of pearlescent pigment has also been used widely.
The birth of artificial mica synthesis should be from 1919, the siemens of Siemens one of Germany
(Simens＆Halske) company achieves first patent right for synthesizing fluorophologopite and counts.Later people's pairing
The growth rate of composition, recrystallization temperature and crystal into fluorophologopite has carried out a series of experiments, and with similar shape
Substituted method has synthesized many different types of micas.
The U.S. is after World War II terminates, whole of the Germany about synthetic mica to be have received totally
On the basis of achievement in research, start the follow-up study of synthetic mica.The resistance to elevated temperatures of synthetic mica compares day
Right mica is superior, is a kind of high temperature insulating material with extensive use in national defense industry and stratosphere.
So since nineteen forty-six, the U.S. just increases the developmental research of synthetic mica, invented in nineteen fifty-one finally
A kind of so-called " hot melt preparation method in resistance " synthesis fluorophologopite new technology without crucible.
The research and development of China's synthetic mica starts from 20 century 70s.With the energy, Aero-Space work
The high speed development of industry, at aspects such as rocket engine, satellite launch and ultra-high pressure current conveyings to insulation material
The performance that material has new requirement, natural mica cannot increasingly meet electronics industry, power industry, aviation
With the demand of the aspect such as aerospace industry and national defense industry.With artificial lens research institute of the Chinese Academy of Sciences, Shanghai
Some scientific research institutions represented carried out by silicate research have started the research of this respect.Hot melt in current barrel-shaped stove
The production technology of preparation method production synthesis fluorophologopite has succeeded.
Founding for synthetic mica uses heating in resistance furnace both at home and abroad at present, is both realized by arc electrode
After the partial melting of material, graphite electrode constitutes resistance furnace with the raw material of melting, gradually real by interior heating hair
The wholly or largely melting of existing material, by crystallisation by cooling, is obtained synthetic mica chip.Although the technology
Large-scale production is succeeded and realized, but there is also many defects, such as energy consumption is big, during production
Between it is long, volatile fluorine ion volatilizees at high temperature, and the synthetic mica wafer yield of high-quality is low, Yi Jishi
Electrode ink polluted product etc..The invention discloses the method with heating using microwave fusion-cast synthetic mica product, and gained
The application of synthetic mica.
The content of the invention
The problem to be solved in the present invention is the defect that existing synthetic mica founds heating in technology i.e. resistance furnace,
Realize that high-temperature fusion crystallization prepares synthetic mica by heating using microwave.
In one embodiment, the invention provides a kind of method for preparing synthetic mica, the method includes：
(1) heating using microwave melting：Using the raw material of synthetic mica, various raw materials are poured into stir mixing machine
It is uniformly mixed, is fitted into the crucible that can absorb or pass through microwave, is placed in high temperature microwave calcining furnace and heats
Melt completely (>=1375 DEG C, such as 1375-1450 DEG C or 1380-1400 DEG C) to material, and be incubated 5 minutes
Above (such as 5 minutes~20 minutes, preferably 5-10 minutes)；
(2) crystallisation by cooling, obtains synthetic mica.
Preferably, crystallisation by cooling is carried out as follows：Control cooling, by regulating and controlling microwave output power,
Realize that cooling rate is not more than 50 DEG C/h (such as 5-50 DEG C/h), when temperature is less than 1365-1350 DEG C,
At especially about 1360 DEG C, turn off microwave power supply, Temperature fall to room temperature obtains synthetic mica.
In above-mentioned implementation method, the raw material of synthetic mica for example includes silica (quartz sand, SiO2), oxygen
Change magnesium (fused magnesite, MgO), alumina powder (Al2O3), potassium fluosilicate (K2SiF6) and optional carbon
Sour potassium (K2CO3) raw material and optional calcium oxide (CaO) raw material, it is preferable that relative to 100 mass parts
Silica, magnesia is 55-75 mass parts, preferably 60-72 mass parts, and aluminum oxide is 20-40 mass parts,
Preferably 24-28 mass parts, potassium fluosilicate is 15-30 mass parts, preferably 20-25 mass parts, and calcium oxide is
0.1-5 mass parts, more preferably from about 1-2 mass parts, potassium carbonate are 0.1-5 mass parts, more preferably from about 1-2 mass
Part.
In another embodiment, the method for preparing synthetic mica of the invention includes：
(1 ') heating using microwave is melted：It is raw material with synthetic mica powder, loading can absorb or through the earthenware of microwave
In crucible, it is placed in high temperature microwave calcining furnace and is heated to material and melts (>=1375 DEG C, such as 1375-1450 DEG C completely
Or 1380-1400 DEG C), and it is incubated more than 5 minutes (such as 5 minutes~20 minutes, preferably 5-10 minutes)；
(2 ') crystallisation by cooling, obtains synthetic mica.
Preferably, crystallisation by cooling is carried out as follows：Control cooling, by regulating and controlling microwave output power,
Realize that cooling rate is not more than 50 DEG C/h, when temperature is less than 1365-1350 DEG C, at especially about 1360 DEG C,
Turn off microwave power supply, Temperature fall to room temperature obtains synthetic mica.
In above-mentioned implementation method, synthetic mica powder is commercially available synthetic mica powder raw material or by existing skill
Any synthetic mica powder prepared by art method.
The invention additionally relates to the pearlescent pigment synthetic mica prepared by the above method.Gained synthetic mica
Particle size range be such as, but not limited to be 5-200 microns, such as 10-60 microns.
The invention further relates to the purposes that synthetic mica prepared by the above method is used to prepare pearlescent pigment.Above-mentioned side
Synthetic mica crystal obtained in method is by the broken compound mica for preparing various particle diameter distributions.
Synthetic mica crystal obtained in the above method can prepare the window material of corrosion-and high-temp-resistant through over mechanical processing
Material.
Compound mica obtained in the above method is also used as cosmetics filler.
Compound mica obtained in the above method can be as the anticorrosive packing of plastics, paint etc..
Method the invention further relates to be prepared pearlescent pigment using above-mentioned synthetic mica, the method is included：
(A) using synthetic mica various raw materials (for example including quartz sand, fused magnesite, alumina powder,
Potassium fluosilicate and potassium carbonate raw material), various raw materials are poured into and is uniformly mixed in stir mixing machine, load energy
Absorb or through the crucible of microwave in, be placed in and be heated to material in high temperature microwave calcining furnace and melt completely
(>=1375 DEG C, such as 1375-1450 DEG C or 1380-1400 DEG C), and it is incubated more than 5 minutes (such as 5
Minute~20 minutes, preferably 5-10 minutes)；Crystallisation by cooling, obtains synthetic mica；Preferably, cooling knot
Crystalline substance is carried out as follows：Control cooling, by regulating and controlling microwave output power, realize cooling rate be not more than 50 DEG C/
Hour (such as 5-50 DEG C/h), when temperature is less than 1365-1350 DEG C, at especially about 1360 DEG C, turn off micro-
Ripple power supply, Temperature fall to room temperature obtains synthetic mica；
Or (A ') is raw material with synthetic mica powder, it is fitted into the crucible that can absorb or pass through microwave, puts
Be heated in high temperature microwave calcining furnace material melt completely (>=1375 DEG C, such as 1375-1450 DEG C or
1380-1400 DEG C), and it is incubated more than 5 minutes (such as 5 minutes~20 minutes, preferably 5-10 minutes)；
Crystallisation by cooling, obtains synthetic mica；Preferably, crystallisation by cooling is carried out as follows：Control cooling, leads to
Regulation and control microwave output power is crossed, realizes that cooling rate is not more than 50 DEG C/h.When temperature is less than
1365-1350 DEG C, at especially about 1360 DEG C, turn off microwave power supply, Temperature fall to room temperature obtains synthesis cloud
It is female；
(B) by synthetic mica crystal fracture made above, delaminate, be classified, hydrolyze coating, filtration washing,
The pearlescent pigment of drying, calcining, preparation with synthetic mica as base material.
The present invention further relates to the pearlescent pigment prepared by the above method.
Pearlescent pigment the invention further relates to provide above method preparation is applied to seed pelleting, paint, printing
Ink, plastics, ceramic material, colored leather, wallpaper, powdery paints or cosmetics etc. are without weather-proof requirement
The purposes in field.
Pearlescent pigment the invention further relates to be prepared by the above method is applied to car paint, outdoor coating
There is the purposes in the field of weather-proof requirement.
Advantages of the present invention
The present invention realizes uniform heating fused raw material in a short time by heating using microwave, by crystallisation by cooling
Prepare synthetic mica.Compared with existing synthetic mica melting technology, energy consumption and cost are reduced, during production
Between it is shorter, and improve product quality, big crystal proportion is high in synthetic mica product, and closes
The transparency and pliability into mica chip is higher.
Specific embodiment
Following examples are non-limiting for the present invention to be discussed in greater detail.
Embodiment 1
SiO2100 grams, Al2O326 grams, 67 grams of MgO, K2SiF623 grams, 1 gram of CaO will be above-mentioned
Technical recipe accurately measures the various raw materials weighed and pours into be stirred in stir mixing machine and mixes 15~60 minutes, dress
Enter resistant to elevated temperatures ceramic crucible, be placed in the micro-wave oven that power is 1.5KW and be heated to melting completely, and protect
Temperature more than 5 minutes；Control cooling, by regulating and controlling microwave output power, realize cooling rate be not more than 50 DEG C/
Hour.When temperature is less than 1360 DEG C, turn off microwave power supply, Temperature fall to room temperature obtains high-quality
Synthetic mica.
Comparative example 1
SiO2100 grams, Al2O326 grams, 67 grams of MgO, K2SiF623 grams, 1 gram of CaO will be above-mentioned
Technical recipe accurately measures the various raw materials weighed and pours into be stirred in stir mixing machine and mixes 15~60 minutes, dress
To enter be heated to melting completely in resistance furnace, and be incubated more than 5 minutes；Control cooling, by regulating and controlling to export
Power, realizes that cooling rate is not more than 50 DEG C/h.When temperature is less than 1360 DEG C, turn off resistance furnace electricity
Source, Temperature fall obtains synthetic mica to room temperature.
The synthetic mica of embodiment 1 compared with the synthetic mica that comparative example 1 is obtained, big crystal proportion
Higher, the transparency and pliability of chip are improved.
Embodiment 2
230 grams of the compound mica (325 mesh) that in resistance furnace prepared by heating, loads resistant to elevated temperatures ceramic earthenware
Crucible, is placed in the micro-wave oven that power is 1.5KW and is heated to melting completely, and be incubated more than 5 minutes；Control
System cooling, by regulating and controlling microwave output power, realizes that cooling rate is not more than 50 DEG C/h.When temperature is low
When 1360 DEG C, turn off microwave power supply, Temperature fall to room temperature obtains the synthetic mica chip of high-quality.
Embodiment 3
Synthetic mica chip in embodiment 1 is excessively broken, screening, and be obtained different average grain diameters can be as
The synthetic mica slurries of pearlescent pigment base material.
Comparative example 3
Synthetic mica chip in comparative example 1 is crushed, delaminates, is classified excessively, be obtained different average grain diameters can
As the synthetic mica slurries of pearlescent pigment base material.
Compared with comparative example 3, the gained of embodiment 3 can be as the yield of the synthetic mica of pearlescent pigment base material
Improve.
Embodiment 4
Synthetic mica chip in embodiment 1 is crushed, delaminates, is classified excessively, be obtained different average grain diameters can
As the compound mica of filler.
Embodiment 5
The synthetic mica slurries of embodiment 3, are converted into 1000g synthetic mica pieces, and particle diameter is D10=10 μm,
D50=25 μm, D90=60 μm, it is added in 10 liters of deionized waters, reactor is 20 liters, is stirred and heated to
80 DEG C, with 1:1 hydrochloric acid regulation pH value is 1.0, and MgO slurries are configured in addition：The MgO of 1000g 99%
It is added in 5 liters of water, stirs, is configured to the slurry of total solid concentration 20%.In order that the slurries prepared
Do not settle, 200 mesh are less than from particle diameter.When starting hydrolysis coating, while starting titanium liquid pump and MgO slurries
Pump, and it is 1.5 to automatically control PH with PH meters.Titanium liquid used is the TiCl not less than 99% with purity4Add water
Prepare, the amount and TiCl for typically adding water4Amount be 1:1, the titanium tetrachloride solution of the mol/L of concentration 2 is modulated to,
HCl gases can be produced during dilution.The HCl gases for discharging are absorbed with water and obtains hydrochloric acid.After keeping dilution
TiCl4There is no hydrolytic spoilage, it is necessary to add the hydrochloric acid of q.s.Titanium liquid and MgO are added by pump simultaneously
Slurry is in reactor, and PH is constant 1.5, added titanium liquid in PH=1.5 constantly hydrolysis coating in mica-based
On material, the pearlescent products such as silvery white and iris are obtained through filtering, washing, calcining.TiCl4The consumption of solution is determined
Final products are golden yellow, orange, red, purple, blueness, green etc..
The assessment of sample quality is using common coating stamp the card or the spray method of plate:By a certain amount of pearl essence
Sample (~10%) is added in resin or paint, coated to stamp the card or spray plate film forming, drying.Use X-Rite
MA68 color difference meters measure color and luster and bright and clean degrees of data.Data are with CIE L*, the displaying of a*, b* system.L* numbers
Value represents brightness, c values (c2=a2+b2) represent depth.
Comparative example 5
Carry out similarly to Example 5, simply replace embodiment 3 using the synthetic mica slurries of comparative example 3
Synthetic mica slurries.The brightness of the gained pearlescent pigment of embodiment 5 and color saturation are carried compared with comparative example 5
It is high.
Embodiment 6
Synthetic mica is prepared by the methods described of embodiment 3 to starch, titanium liquid and MgO are prepared by the methods described of embodiment 5
Slurry, prepares 20% SnCl again in addition4Solution：10g SnCl4It is dissolved in 40g deionized waters, pump adds PH=1.5
Reactor in, titanium coating is then carried out as described in embodiment 5, and PH is automatically controlled with MgO slurries be
1.5.Product is obtained through filtering, washing, drying, calcining after reaching desired color, is with silvery white product
Example, synthetic mica, 99% TiCl4, SnCl4It is respectively with MgO weight：1000：450：10：400
(g).The thickness of the film being ultimately formed is 45 nanometers.
Embodiment 7
Synthetic mica slurry is prepared as described in embodiment 3, MgO slurries is prepared as described in embodiment 5, and adjust PH
To 3.0.10% FeCl is prepared in addition3Solution：1000g FeCl3It is dissolved in 9 liters of deionized water.Simultaneously
Pump adds FeCl3Solution and MgO are starched, and it is 3.0 to automatically control PH.As appropriate FeCl3Solution adds anti-
After answering kettle, the pearl essence with metallic luster is obtained through filtering, washing, calcining.FeCl3The amount of solution is determined
Final products are golden, orange, red, purple, green etc..By taking brass golden product as an example, mica,
MgO、FeCl3Consumption be respectively by dry weight：1000：400：400(g).The film being ultimately formed
Thickness is 50 nanometers.
Embodiment 8
Mica is prepared by the mode of embodiment 3 to starch and carry out SnO2Coating, then by pH value to 3.0 by implementation
The mode of example 7 carries out iron coating.The pearl essence with metallic luster is obtained through filtering, washing, calcining.FeCl3
The amount of solution determines that final products are golden, orange, red, purple, green etc..Produced so that brass is golden
As a example by product, mica, ferric trichloride and MgO, SnCl4Actual amount difference 1000：400：400：10
(g).The thickness of the film being ultimately formed is about 50 nanometers.
Embodiment 9
After by the mode bag titanium of embodiment 5, then iron coating is carried out as described in embodiment 7.Through filtering, washing,
Calcining is obtained titanium, 2 layers of pearl essence of coating of iron with metallic luster.Titanium, iron ratio and consumption are determined most
The color of finished product.
Embodiment 10
The pearly-lustre face of 2 layers of coating of ferrotianium is obtained by the iron coating of embodiment 7 again by after the titanium coating of embodiment 6
Material.
Embodiment 11
Iron liquid in titanium liquid in embodiment 5 and embodiment 7 is pressed into Ti:Fe=100:10 (weight ratio) ratios mix,
And synthetic mica slurry tune pH value to 2.5 is prepared by embodiment 3, starched with MgO and automatically control PH for 2.5 enter
Row ferrotianium mixing coating.
Embodiment 12
Iron liquid in titanium liquid in embodiment 6 and embodiment 7 is pressed into Ti:Fe=100:10 (weight ratio) ratios mix,
And synthetic mica slurry tune pH value to 2.5 is prepared by embodiment 3, starched with MgO and automatically control PH for 2.5 enter
Row ferrotianium mixing coating.
Embodiment 13
Embodiment 5-12 is repeated, simply PH controlling agents MgO slurries can be changed to Mg (OH)2Slurry, or MgO
Slurry and Mg (OH)2The mixture of slurry.
Embodiment 14
Embodiment 13 is repeated, simply PH controlling agents can use calcium carbonate (CaCO3) slurry or
CaCO3/MgO/Mg(OH)2, mixture in any proportion.
Embodiment 15
Embodiment 13 is repeated, simply PH controlling agents can use NaOH solution.
Embodiment 16
Embodiment 13 is repeated, simply PH controlling agents can use NaCO3Solution.
Application Example
Pearlescent pigment obtained by above example 5-16 is used to painting, coating, printing-ink, plastics, pottery
The application fields such as ceramic material, colored leather, wallpaper, powdery paints, cosmetics.For example in paint or coating
Middle addition pearlescent pigment of the invention, can prepare the very excellent coating of color and color and luster.
Application Example 1：By taking paint spraying application as an example:
Pearlescent pigment prepared by 4.00 grams of embodiment 5-14 of precise, adds 4.0 grams of butyl acetates and 8.0 grams
Polyester car paint resin, is placed in dispersed with stirring 10 minutes under agitator, continues to add car paint resinite
It is 84.0 grams to stir 5 minutes.The viscosity of coating to Ford 4 cup 14-15 seconds is first adjusted before spraying.Spray
Control the temperature between spraying for 25 degrees Celsius during painting, relative humidity is 60%.Twice of spraying, dodges dry 10 points
Clock back cover varnish, dodges to do again and is toasted 30 minutes after 140 degrees Celsius.
Application Example 2：As a example by being molded application:
Accurately weigh polypropylene (PP) dried at 200 grams 105 DEG C to expect in plastic sealing bag, add 1 milli
The gloss oil (being also dispersed oil) for rising and then vibration, allow gloss oil to be sufficiently mixed with polypropylene material.
Prepared to weigh pearl essence addition plastic sealing bag prepared by 4.000 grams of embodiment 5-14 with assay balance
In, vibrate again, rub, make pearl essence full and uniform dispersion in PP particles.
Barrel temperature is reached after setting value (usually 180 DEG C~200 DEG C), and the polypropylene material for preparing is added hopper
The inside, extrudes original clout in barrel using injection and melten gel function, and untill extrusion virgin material, extrusion is new
Material should be glossy, free from admixture, without stain, without burning, bubble-free；Meanwhile, nozzle should be existing without blocking during injection
As.After two panels is as good as before and after plastic sheet out, reproduction plastic sheet out is stablizes qualified product,
Automatically normal production can be entered.
Claims (12)
1. a kind of method for preparing synthetic mica, the method includes：
(1) heating using microwave melting：Using the raw material of synthetic mica, various raw materials are poured into stir mixing machine
It is uniformly mixed, is fitted into the crucible that can absorb or pass through microwave, is placed in high temperature microwave calcining furnace and heats
Melt completely (>=1375 DEG C, such as 1375-1450 DEG C or 1380-1400 DEG C) to material, and be incubated 5 minutes
Above (such as 5 minutes~20 minutes, preferably 5-10 minutes)；With
(2) crystallisation by cooling, obtains synthetic mica；
Preferably, crystallisation by cooling is carried out as follows：Control cooling, by regulating and controlling microwave output power,
Realize that cooling rate is not more than 50 DEG C/h (such as 5-50 DEG C/h), when temperature is less than 1365-1350 DEG C,
At especially about 1360 DEG C, turn off microwave power supply, Temperature fall to room temperature obtains synthetic mica.
2. method according to claim 1, wherein, the raw material of synthetic mica includes silica (stone
Sand, SiO2), magnesia (fused magnesite, MgO), alumina powder (Al2O3), potassium fluosilicate (K2SiF6)
With optional potassium carbonate (K2CO3) raw material and optional calcium oxide (CaO) raw material, it is preferable that relative to
100 mass parts silica, magnesia is 55-75 mass parts, preferably 60-72 mass parts, and aluminum oxide is 20-40
Mass parts, preferably 24-28 mass parts, potassium fluosilicate is 15-30 mass parts, preferred 20-25 mass parts,
Calcium oxide is 0.1-5 mass parts, more preferably from about 1-2 mass parts, and potassium carbonate is 0.1-5 mass parts, more preferably
About 1-2 mass parts.
3. a kind of method for preparing synthetic mica, the method includes：
(1 ') heating using microwave is melted：It is raw material with synthetic mica powder, loading can absorb or through the earthenware of microwave
In crucible, it is placed in high temperature microwave calcining furnace and is heated to material and melts (>=1375 DEG C, such as 1375-1450 DEG C completely
Or 1380-1400 DEG C), and it is incubated more than 5 minutes (such as 5 minutes~20 minutes, preferably 5-10 minutes)；
(2 ') crystallisation by cooling, obtains synthetic mica；
Preferably, crystallisation by cooling is carried out as follows：Control cooling, by regulating and controlling microwave output power,
Realize that cooling rate is not more than 50 DEG C/h, when temperature is less than 1365-1350 DEG C, at especially about 1360 DEG C,
Turn off microwave power supply, Temperature fall to room temperature obtains synthetic mica.
4. the pearlescent pigment synthetic mica for being prepared by the method any one of claim 1-3.
5. the synthetic mica for being prepared by the method any one of claim 1-3 is used to prepare pearly-lustre face
The purposes of material.
6. the synthetic mica crystal for being prepared by the method any one of claim 1-3 is used for by machine
Tool processing prepares the purposes of the window material of corrosion-and high-temp-resistant.
7. the compound mica for being prepared by the method any one of claim 1-3 is filled out for cosmetics
The purposes of material.
8. the compound mica for being prepared by the method any one of claim 1-3 is used for plastics, oil
The purposes of the anticorrosive packing of paint.
9. the synthetic mica that prepared by the method any one of usage right requirement 1-3 prepares pearlescent pigment
Method, the method includes：
(A) using synthetic mica various raw materials (for example including quartz sand, fused magnesite, alumina powder,
Potassium fluosilicate and potassium carbonate raw material), various raw materials are poured into and is uniformly mixed in stir mixing machine, load energy
Absorb or through the crucible of microwave in, be placed in and be heated to material in high temperature microwave calcining furnace and melt completely
(>=1375 DEG C, such as 1375-1450 DEG C or 1380-1400 DEG C), and it is incubated more than 5 minutes (such as 5
Minute~20 minutes, preferably 5-10 minutes)；Crystallisation by cooling, obtains synthetic mica；Preferably, cooling knot
Crystalline substance is carried out as follows：Control cooling, by regulating and controlling microwave output power, realize cooling rate be not more than 50 DEG C/
Hour (such as 5-50 DEG C/h), when temperature is less than 1365-1350 DEG C, at especially about 1360 DEG C, turn off micro-
Ripple power supply, Temperature fall to room temperature obtains synthetic mica；
Or (A ') is raw material with synthetic mica powder, it is fitted into the crucible that can absorb or pass through microwave, puts
Be heated in high temperature microwave calcining furnace material melt completely (>=1375 DEG C, such as 1375-1450 DEG C or
1380-1400 DEG C), and it is incubated more than 5 minutes (such as 5 minutes~20 minutes, preferably 5-10 minutes)；
Crystallisation by cooling, obtains synthetic mica；Preferably, crystallisation by cooling is carried out as follows：Control cooling, leads to
Regulation and control microwave output power is crossed, realizes that cooling rate is not more than 50 DEG C/h；When temperature is less than 1365-1350 DEG C,
At especially about 1360 DEG C, turn off microwave power supply, Temperature fall to room temperature obtains synthetic mica；
(B) by synthetic mica crystal fracture made above, delaminate, be classified, hydrolyze coating, filtration washing,
The pearlescent pigment of drying, calcining, preparation with synthetic mica as base material.
10. the pearlescent pigment for being prepared by the method described in claim 9.
11. pearlescent pigments prepared by method described in claim 10 be applied to seed pelleting, paint,
The purposes of printing-ink, plastics, ceramic material, colored leather, wallpaper, powdery paints or cosmetics.
12. pearlescent pigments prepared by the method described in claim 10 are applied to car paint, outdoor painting
The purposes of material.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110467188A (en) * | 2019-09-20 | 2019-11-19 | 长江师范学院 | A kind of synthetic mica and its preparation method and application |
| CN113829770A (en) * | 2021-10-08 | 2021-12-24 | 东莞金杯印刷有限公司 | Glazing process for replacing adhesive film |
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