Do you know all uses of wollastonite?-1 BY:Danny

What are the main types of wollastonite The main types of wollastonite include the following:

Wollastonite products can be divided into two categories: high aspect ratio wollastonite and finely ground wollastonite. The former mainly utilizes its needle like physical and mechanical properties and is widely used in fields such as plastics, rubber, asbestos substitutes, paint coatings, etc. It can increase the hardness, bending strength, impact resistance of products, improve the electrical properties of materials, enhance thermal stability and dimensional stability, and is the most promising application field. The latter is mainly used in the ceramic and metallurgical industries, such as Si0 in wollastonite The Ca0 component provides low expansion rate and good thermal shock resistance.

Introduction to various applications of wollastonite:

1. Used for rubber

In different products, specific wollastonite powder is used instead of lithopone, some titanium dioxide, white carbon black, light calcium, clay, etc., and most of the performance indicators of the products are improved. The application results show that wollastonite can improve the covering ability of white coloring agents and play a certain whitening role; Used in light colored adhesive materials, it can replace a large amount of titanium dioxide, clay, and lithopone, playing a certain reinforcing role and reducing product costs. The combination of wollastonite and coupling agent can improve the properties of the adhesive and expand its application range.

2. Used for ceramic raw materials

Wollastonite can be used to prepare various electromagnetic ceramics, architectural ceramics, and daily-use ceramics. The quality requirements for its wollastonite are: SiO238%～58%，CaO36%～55%，CO2≤6%，Fe2O3≤1.7%。 Ceramic raw materials account for approximately 40% to 45% of the world's total consumption of wollastonite. Wollastonite can densify ceramic structures, improve mechanical strength, reduce wet expansion coefficient, enhance green body strength and molding quality, lower firing temperature, shorten firing cycle, and achieve the goal of energy conservation and efficiency improvement. Using wollastonite as raw material for architectural ceramics can reduce the firing temperature by 200 ℃ (from 1280 ℃ to 1080 ℃) and shorten the firing cycle from 58h to 24h. In the glaze industry, using wollastonite as raw material in glazed tiles can achieve low-temperature and rapid firing, with a fuel saving of up to 30% for simple firing; Moreover, it can enhance the whiteness of the glaze, improve its flowability, and reduce the number of punctures in the product. Wollastonite can improve the thermal shock resistance of the green body and generate calcium feldspar (melting point 1550 ℃) through solid-state reaction, which can achieve low-temperature rapid sintering. Microscopic wollastonite chains enhance the bonding between glass phase particles, enabling products to withstand special mechanical processes such as sawing and drilling. Additionally, they provide a low loss insulating crystalline phase that can be used as electrical and electronic ceramics.

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