How to identify mica powder?

Mica powder identification is very simple. Generally have the following methods. first of all, the whiteness of mica powder is not high, about 75 or so; According to current market, to find a better mica powder supplier is really not easy.

First, often received customer questions, reaction mica powder brightness of 90 or so, under normal circumstances, mica powder whiteness is generally not high, only about 75%. If doped with other fillers such as calcium carbonate, talc, whiteness will be greatly improved.

Second, the mica powder is flaky structure, take a beaker, add 100ml of pure water, stirring with a glass rod, you can see that the mica powder suspension is very good; other fillers including transparent powder, talc, calcium carbonate and other products, suspension Sex is not excellent mica powder.

3, get a little, painted on the wrist, a little pearl effect. Mica powder, especially sericite powder, has a certain degree of pearl effect, widely used in cosmetics, coatings, plastics, rubber and other industries.  If the purchase of mica powder pearl effect is poor or without any pearlescent effect, this should be noted. Leijie company is a professional production and operation of mica powder, sericite powder, coating grade mica powder, rubber grade mica powder, cosmetic grade mica powder and conductive mica powder professional supplier, has a group of professional high-quality, technology Capacity, quality control system of strict professional production staff to ensure that the mica powder in the production of qualified only after the supply to the customer, a great lifting of the customers to worry about.

How to classify quartz sand?

Because of the high fire resistance of quartz, in industry it is often divided into ordinary quartz sand, refined quartz sand, high-purity quartz sand, fused silica sand and silicon powder, etc. So how to specifically classify quartz sand?

1.Ordinary quartz sand: 

SiO2 ≥ 90-99% Fe2O3 ≤ 0.06-0.02%, refractoriness 1750 ℃, the appearance of some large particles, the surface of yellow cysts. Particle size range of 5-220 mesh, according to user requirements particle size production. Main purposes: metallurgy, ink silicon carbide, glass and glass products, enamel, cast steel, water filtration, soda, chemical, spray noise and other industries.

 

2.Refined quartz sand: 

also known as pickling quartz sand, SiO2 ≥ 99-99.5% Fe2O3 ≤ 0.02-0.015%, selected high-quality ore from the complex processing. Particle size range of 5-480 mesh, according to user requirements, the appearance of white or crystalline. Main purposes: advanced glass, glass, refractories, smelting stone, precision casting, grinding wheel and so on. (Mm for the mm)

 

3.High purity quartz sand: 

SiO2 ≥ 99.5-99.9% Fe2O3 ≤ 0.005%, is the use of 1-3 grade natural crystal stone and high quality natural stone class, carefully selected, fine processing. Size range 1-0.5mm, 0.5-0.1mm, 0.1-0.01mm, 0.01-0.005mm, according to user requirements. (Mm for the mm)

 

4.Fused silica sand: Chemical composition:

SiO2 99.9-99.95% Fe2O3 5PPM-25PPM max Li2O 1-2PPM max Al2O3 20-30PPM max

K2O 20-25 PPM max Na2O 10-20 PPM max (PPM is parts per million)

Physical properties:

Appearance is colorless and transparent block, particles or white powder.

Relative specific gravity: 2.21;

Mohs hardness: 7.0;

PH: 6.0;