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Synthesized mica crystal plate with high flexibility and high splitting performance as well as preparation method

A technology for synthesizing mica and high peelability, applied in chemical instruments and methods, silicon compounds, inorganic chemistry, etc., can solve the problems of low color saturation, poor peelability, hard synthetic mica, etc., achieve good transparency and reduce impurities Effect

Inactive Publication Date: 2012-10-10
杨修直
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  • Description
  • Claims
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Problems solved by technology

However, compared with natural mica, synthetic mica also has a major disadvantage. Synthetic mica is hard and brittle, that is, its flexibility is poor, generally less than 35% of the flexibility (coiling method), and its peelability is also poor, resulting in the thickness of the finished powder. Large, small diameter-thickness ratio
This is a fatal shortcoming in the use of pearlescent pigments. Large thickness will lead to small diameter-thickness ratio, low covering rate, low color saturation, and even no pearlescent effect under the same particle size, especially for small particles. The influence of diameter is greater
Therefore, if synthetic mica chips can replace natural mica in the pearlescent pigment industry, it is necessary to solve the key technical problems of synthetic mica being hard and brittle and poor in peelability.
Chinese patent CN03135050.x discloses an artificial crystal synthetic mica and its preparation method and device, using quartz sand, magnesia, alumina powder, potassium fluorosilicate and potassium carbonate as raw materials, and using three-phase electric heating and melting method to prepare artificial crystal Synthetic mica, this method cannot solve the key technical problems of hard and brittle synthetic mica flakes and poor separation and peeling
Chinese patent CN200510044178.7 also discloses an artificial crystal synthetic mica and its preparation method. It also uses quartz sand, magnesia, alumina powder, potassium fluorosilicate and potassium carbonate as raw materials, and adopts a two-phase power supply heating and melting method to prepare artificial crystals. Synthetic mica also cannot solve the key technical problems of hard and brittle synthetic mica flakes and poor separation and peeling
Chinese patent 200910177075.6 discloses a preparation method of synthetic mica, which uses talc instead of part of quartz sand and magnesia to prepare synthetic mica, but fails to solve the key technical problems of hard and brittle synthetic mica flakes and poor separation and peeling

Method used

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  • Synthesized mica crystal plate with high flexibility and high splitting performance as well as preparation method
  • Synthesized mica crystal plate with high flexibility and high splitting performance as well as preparation method
  • Synthesized mica crystal plate with high flexibility and high splitting performance as well as preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Embodiment 1. A two-phase AC power supply is used.

[0047] 1. The amount of raw materials is according to the following formula, calculated on the basis of one ton per mixing:

[0048]

[0049] Quartz sand, fused magnesia, alumina (industrial grade), potassium fluorosilicate, potassium carbonate and quicklime are used as raw materials. The chemical composition is shown in Table 1.

[0050] Table 1

[0051]

[0052] The actual consumption of raw materials is as follows:

[0053]

[0054] 2. Accurately weigh the actual amount of raw materials determined in the above table, and put in 2m 3 In the double-helix conical mixer, stir and mix for 15 minutes, discharge the material and bag it for standby (80kg / bag), and stir 16 times in total, totaling 15319.8kg;

[0055] 3. The volume range of the furnace body is:

[0056] V=K*W / p

[0057] =(1.05~1.2)×15.3198÷2.8

[0058] =5.74~6.56(m 3 )

[0059] According to the volume range of the furnace body, the clearance...

Embodiment 2

[0075] Embodiment 2 uses a two-phase AC power supply.

[0076] The amount of raw materials is according to the following formula, based on 1 ton of mixing and stirring each time:

[0077]

[0078] Still using quartz sand, fused magnesia, alumina (industrial grade), potassium fluorosilicate, potassium carbonate, and quicklime as raw materials, the chemical composition is the same as that in Table 1 of Example 1. The actual amount of each raw material is:

[0079]

[0080] 2. Accurately weigh the actual amount of raw materials determined in the above table, and put in 2m 3In the double-helix conical mixer, stir and mix for 38 minutes, discharge and bag for standby (80kg / bag), need to stir 16 times in total, totaling 16012.8kg;

[0081] 3. The volume range of the furnace body is:

[0082] V=K*W / p

[0083] =(1.05~1.2)×16.0128÷2.8

[0084] =6.0~6.86(m 3 )

[0085] According to the volume range of the furnace body, the clearance size of the furnace body is determined as...

Embodiment 3

[0101] Embodiment 3 uses a two-phase AC power supply.

[0102] The amount of raw materials is according to the following formula, with each batch being stirred as 1 ton:

[0103]

[0104] Still using quartz sand, fused magnesia, alumina (industrial grade), potassium fluorosilicate, potassium carbonate, and quicklime as raw materials, the chemical composition is the same as that in Table 1 of Example 1. The actual amount of each raw material is:

[0105]

[0106] Since the amount of calcium oxide contained in the raw material is greater than the calcium oxide required by the formula, there is no need to add calcium oxide.

[0107] 2. Accurately weigh the actual amount of raw materials determined in the above table, and put in 2m 3 In the double-helix conical mixer, stir and mix for 60 minutes, discharge and pack into bags for standby (80kg / bag), and stir 16 times in total, totaling 15469.6kg;

[0108] 3. The volume range of the furnace body is:

[0109] V=K*W / p

[01...

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Abstract

The invention discloses a synthesized mica crystal plate with high flexibility and high splitting performance as well as a preparation method, the method is characterized in that in a formula for melting the synthesized mica, 0.1-0.6% of CaO (by referring calcium oxide, not specially referring calcium oxide) is introduced as an impurity enrichment agent, thereby the impurity can be enriched, and the flexibility and splitting performance of the synthesized mica can be enhanced, the flexibility of the obtained synthesized mica crystal plate can reach 38-50% (a winding method), 0.1-0.6% of CaO is contained, the thickness of the obtained powder plate is 0.05-0.8mum, especially 0.05-0.5mum. The synthesized mica crystal plate is used for preparing the ultrathin synthesized mica crystal powder, and can be used for industries of thermostability base materials, cosmetics, anticorrosive paints and engineering plastics.

Description

technical field [0001] The invention relates to a synthetic mica crystal sheet with high flexibility and high peelability and a preparation method thereof, belonging to the field of new non-metallic materials. Background technique [0002] Synthetic mica crystals have a history of decades of development. In China, as early as the 1960s, the Shanghai Institute of Ceramics conducted in-depth research and achieved a lot of research results. At present, the main synthesis methods are hydrothermal method, high temperature melting method and crucible method. At the beginning of the research, the main purpose was to replace natural mica and use it as an insulating material in electronic components and the power industry. Therefore, the size (area) of the crystal was required to be large, that is, the so-called stripped mica had a high yield. Therefore, research In the development, more attention should be paid to the size growth of the crystal sheet. The Shanghai Institute of Ce...

Claims

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Application Information

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IPC IPC(8): C01B33/42
Inventor 杨修直
Owner 杨修直
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