Applications of Mica
Main application fields: mica powder has the characteristics of large diameter thickness ratio, high temperature resistance, acid and alkali resistance, stable properties, crack resistance and so on. It is widely used in building materials industry, fire fighting industry, fire extinguishing agent, welding electrode, coating, plastic, rubber, electrical insulation, papermaking, asphalt paper, sound insulation and damping materials, friction materials, casting EPC coating, oil field drilling, pearlescent pigment and other chemical industries. Superfine mica powder can be used as functional filler for plastics, coatings, paints, rubber, etc., which can improve its mechanical strength, enhance its toughness, adhesion, anti-aging and corrosion resistance. In addition to its extremely high electrical insulation, acid-base corrosion resistance, elasticity, toughness and sliding, heat and sound insulation, low coefficient of thermal expansion and other properties, it is also the first to introduce the characteristics of the second sheet, such as smooth surface, large diameter thickness ratio, regular shape, strong adhesion and so on. In industry, it is mainly used as insulating material for electrical equipment and electrical equipment by its insulation and heat resistance, acid resistance, alkali resistance, compression resistance and peeling resistance; Secondly, it is used to manufacture furnace windows and mechanical parts of steam boilers and smelting furnaces. Mica scrap and mica powder can be processed into mica paper, and can also replace mica sheet to make various insulating materials with low cost and uniform thickness.
Common models in various fields: Mica 16-60 mesh, mainly used in welding electrode and other industries; Mesh 60-325 is mainly used for mica ceramics, which has high insulation strength and high dielectric strength. It does not carbonize and burst under strong arc, and can be used for a long time at a high temperature of 350 ℃. It has no water absorption and small coefficient of thermal expansion; 200-1250 mesh is used as paint admixture, which can reflect light and heat, reduce the damage of ultraviolet and other light and heat to the paint film, increase the acid and alkali resistance and electrical insulation of the coating, improve the frost resistance, toughness and compactness of the coating, and reduce the air permeability of the coating. Prevent cracking and improve the resistance to oil-water erosion. Paint for demoulding when pouring metal, coating for casting lost foam and electroplating bath, filler in cosmetics, additive in antifreeze and sunscreen, admixture in sealing paint ash, suspension agent of dry powder fire extinguishing agent, etc; After 325-1250 mesh mica powder is added into engineering plastics PVC, PP and ABS, its thermal deformation temperature is almost doubled, various mechanical properties are not significantly reduced, and the impact strength is slightly improved; Adding 20% mica powder to nylon 66 not only slightly reduces the mechanical properties, but also significantly changes the appearance of the product and enhances the warpage resistance. In the rubber backing plate, the insulation performance of the product can be significantly improved. In plastic film, it can improve the expansion resistance, elongation, right angle tear strength and other indexes of the film to meet and exceed the standard.
Application of Vermiculite
1. Vermiculite is used for thermal insulation
Expanded vermiculite has the characteristics of being porous, light weight and high melting point, and is most suitable for high temperature insulation materials ( below 1000 ℃) and fireproof insulation materials. The fifteen-centimeter-thick cement vermiculite board was burned at 1000 ℃ for 4-5 hours, and the temperature on the back was only about 40 ℃. The seven-centimeter thick vermiculite slab was burned at a high temperature of 3000 ℃ for five minutes by a flame-welded flame net . The front side melted, and the back was still not warm by hand. So it surpasses all insulation materials. Such as asbestos and diatomite products.
Vermiculite can be used as thermal insulation materials in high-temperature facilities, such as thermal insulation bricks, thermal insulation boards and thermal insulation caps in the smelting industry. Any equipment that requires thermal insulation can be insulated with vermiculite powder , cement vermiculite products (vermiculite bricks, vermiculite plates, vermiculite pipes, etc.) or asphalt vermiculite products. Such as walls, roofs, cold storages, boilers, steam pipes, liquid pipes, water towers, converter furnaces, heat exchangers, dangerous goods storage, etc.
2.Vermiculite is used for fire retardant coating
Vermiculite is widely used as fire retardant coating for tunnels, bridges, buildings and basements due to its high temperature resistance and thermal insulation properties.
3. Vermiculite is used for plant cultivation
Because vermiculite powder has good water absorption, air permeability, adsorption, looseness, non hardening and other properties, and it is sterile and non-toxic after high temperature roasting, which is conducive to the rooting and growth of plants. It can be used for planting, seedling raising and cutting of precious flowers and trees, vegetables, fruit trees and grapes, as well as for making flower fertilizer and nutrient soil.
4. Manufacturing for chemical coatings
Vermiculite having a corrosion resistance to acid, of 5% or less of sulfuric acid, hydrochloric acid, acetic acid, 5% aqueous ammonia, sodium carbonate, anti-corrosive effect. Because of its light weight, looseness, smoothness, large diameter-to-thickness ratio, strong adhesion, and high temperature resistance, it can also be used as a filler in the manufacture of paints (fireproof paints, anti-irritant paints, waterproof paints) to prevent paint Settling and sending product performance.
5.Vermiculite is used for friction materials
Expanded vermiculite has sheet-like and thermal insulation properties, can be used for friction materials and braking materials, and has excellent performance, non-toxic and harmless, and is a new environmentally friendly material for environmental pollution.
6.Vermiculite is used for hatching
Vermiculite is used to hatch eggs, especially reptile ones. The eggs of all kinds of reptiles, including geckos, snakes, lizards and even turtles, can be hatched in expanded vermiculite, which in most cases must be wetted to maintain humidity. A depression is then formed in the vermiculite, which is large enough to hold reptile eggs and ensure that each egg has enough space to hatch.
Application of glass beads
Glass beads are used in zebra crossings, double yellow lines and night reflective devices of traffic signs.
Glass beads are used for industrial shot peening and polishing, as well as dispersion and grinding media in dye, paint, ink, coating, resin, chemical industry and other industries.
Glass beads are widely used in industry, transportation, aviation, medical devices, nylon, rubber, engineering plastics and other fields as fillers and reinforcements. Such as gravity blanket filling, compressive filling, medical filling, toy filling, joint sealant, etc.
Application of tourmaline
(1) Building decoration materials
The passive negative ion generating material with tourmaline ultrafine powder as the main component can be compounded with decorative materials in the manufacturing process of architectural coatings, laminate flooring, solid wood flooring, wallpaper and other decorative materials. Through compounding, the negative ion generating material can be attached to the surface of these decorative materials, so that the decorative materials have the functions of releasing hydroxyl negative ions, environmental protection and health care.
(2) Water treatment materials
The spontaneous polarization effect of tourmaline crystal enables it to generate an electrostatic field of 104-107v/m in the range of surface thickness of about tens of microns. Under the action of electrostatic field, water molecules are electrolyzed to generate active molecules ho+, h, o+. The extremely strong interfacial activity makes tourmaline crystals have the function of purifying water sources and improving the natural environment of water bodies.
(3) Crop growth promoting materials
The electrostatic field generated by tourmaline, the weak current around it and the infrared characteristics can increase the soil temperature, promote the movement of ions in the soil, activate the water molecules in the soil, which is conducive to the absorption of water by plants and stimulate the growth of plants.
4) Gem processing
Tourmaline, which is bright and beautiful, clear and transparent, can be processed into gem.
(5) Tourmaline electret masterbatch for melt blown cloth
Tourmaline electret is a material used in the process of melt blown non-woven fabric electret, which is made of nano tourmaline powder or particles made with its carrier through melt blown method, and is charged into an electret under 5-10kv high voltage by an electrostatic generator to improve fiber filtration efficiency. Because tourmaline has the function of releasing negative ions, it also has antibacterial properties.
(6) Air pollution treatment materials
The spontaneous polarization effect of tourmaline crystal makes the water molecules around the crystal electrolyze to generate air anion, which has surface activity, reducibility and adsorption. At the same time, tourmaline has a radiation wavelength of 4-14 at room temperature μ m. The performance of far infrared ray with emissivity greater than 0.9 is helpful to purify air and improve environmental quality.
(7) Photocatalytic materials
The surface electricity of tourmaline can make the electronic e-excitation transition on the valence band of light energy to the conduction band, so that the corresponding hole h+ is generated in the valence band. The composite material prepared by combining tourmaline and TiO2 can improve the light absorption efficiency of TiO2, promote TiO2 photocatalysis, and achieve the purpose of efficient degradation.
(8) Medical and health care materials
Tourmaline crystal is widely used in medical treatment and health care because of its characteristics of releasing negative air ions and radiating far-infrared rays. Tourmaline is used in textiles (health underwear, curtains, sofa covers, sleeping pillows and other articles). Its two functions of emitting far-infrared ray and releasing negative ions work together, which can stimulate the activity of human cells and promote human blood circulation and metabolism more than a single function. It is an ideal health functional material.
(9) Functional ceramics
Adding tourmaline to traditional ceramics will enhance the function of ceramics. For example, tourmaline is used to release negative ions and make melt blown non-woven fabric by radiation melt blowing method, and is charged into electret under 5-10kv high voltage through electrostatic generator to improve fiber filtration efficiency. Because tourmaline has the function of releasing negative ions, it also has antibacterial property. Under the action of far-infrared radiation, phosphate free far-infrared ceramic laundry balls containing tourmaline particles are made to replace various washing powders and detergents, and the dirt on clothes is removed by using the principle of interface activation.
(10) Functional coating
Because tourmaline has permanent electrode, it can continuously release negative ions. The use of tourmaline in exterior wall coating can prevent the damage of acid rain to buildings; It is used as interior decoration material to purify indoor air: the paint compounded with organosilane resin can be used on medium and high-grade automobiles, which can not only improve the acid resistance and solvent resistance of automobile skin, but also replace waxing. Adding electric stone powder to the hull coating of ocean going vessels can adsorb ions, form monolayers through electrolysis of water, prevent marine organisms from growing on the hull, avoid damage to the marine environment caused by harmful coatings, and enhance the corrosion resistance of the hull.
(11) Electromagnetic shielding material
Tourmaline health products can be widely used in automobile cab, computer operation room, arc operation workshop, substation, game console, TV, microwave oven, electric blanket, telephone, mobile phone and other electromagnetic pollution places to reduce the radiation of electromagnetic pollution to human body. In addition, because of its electromagnetic shielding effect, it has a very important application in the national defense industry.
(12) Other uses
Electric stone can be used to prepare anti-bacterial and fresh-keeping packaging materials, such as plastic film, box, packaging paper and carton, and can also be used as additives for toothpaste and cosmetics; Composite tourmaline in electronic equipment and household appliances can eliminate the harmful effects of positive ions. Tourmaline can also be used to make far-infrared radiation composite materials with antibacterial, bactericidal, deodorizing and other functions.
Application of colored sandstone flakes
Colored sand flakes are mainly used in: construction, decoration, terrazzo aggregate, real stone paint, colored sand coating, etc.
Pebbles are mainly used in pavement, park roads, bonsai filling materials, etc.
