Preparation method and application of spherical quartz SiO2 powder
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Overview of spherical quartz SiO2 powder
Spherical quartz SiO2 powder, also known as spherical silica powder, refers to the amorphous quartz powder material in which a single particle is spherical and the main component is silica. It is white powder with uniform particle size, good transparency, good chemical stability, thermal stability and safety. It is insoluble in water.
Spherical quartz powder is mainly used for copper sheet and epoxy plastic packaging in large-scale integrated circuit packaging. It is also used in high-tech fields such as aerospace, fine chemicals and daily cosmetics.
The preparation methods of spherical quartz powder mainly include flame melting method, plasma heating furnace method, chemical synthesis method and hydrolysis method.
1. Flame melting method: the balling principle is that the high-temperature flame gun ejects a high-temperature flame of 1600-2000 ℃. When the powder enters the high-temperature flame area, its corner absorbs heat and melts, and the heat is further transferred to the inside of the powder, and the powder particles melt completely. Under the action of surface tension, the object always tends to a stable state, and the spherical state is the most stable state, so as to achieve the purpose of product ball.
2. Plasma heating furnace method: thermal plasma is also known as local thermodynamic equilibrium plasma. Its main feature is that the temperatures of local electrons (TE), ions (TI) and gases (TG) in the plasma are almost the same. Arc plasma, high-frequency plasma and induced plasma all belong to thermal plasma.
Spherical quartz powder is prepared by high frequency plasma melting method, which has the advantages of moderate temperature range, stable control, high yield and high spheroidization rate. It is a more suitable production method. Its principle and process are similar to that of flame melting method, except that the high-temperature heat source is changed into plasma generator.
3. chemical synthesis: at a certain temperature, silica sol lotion is treated with ammonia or ammonium bicarbonate to obtain spherical gel, then treated with acid to obtain hydrated spherical silica, and then refined and heat treated to obtain spherical silica powder that meets the needs. It is characterized by low uranium content and its disadvantage is that the product is easy to agglomerate.
4. Hydrolysis method: add liquid SiCl4 into deionized water with different dispersants at a constant speed, and stir the hydrolysate with quartz rod at high speed. After aging, washing and filtering, the hydrolysate is dried in a 100 ℃ - 200 ℃ incubator, dehydrated to constant weight, and then transferred to a high-temperature sintering furnace. High purity spherical quartz powder with required particle size can be obtained by high temperature sintering, dehydroxylation and crystal transformation at different temperatures.
Application of spherical quartz SiO2 powder
Quartz powder SiO2 is widely used as substrate and packaging material for large-scale or ultra large-scale integrated circuits because of its excellent properties such as high dielectric, heat resistance, moisture resistance, corrosion resistance, high filling rate, low stress, low impurities, low friction coefficient and low price.
In addition, spherical quartz powder can also be widely used in electronic ink, optical fiber, high-grade cosmetics, high-grade precision ceramic manufacturing, precision grinding of optical devices and electronic components, and as special coating filler.
Spherical quartz SiO2 powder is mainly used for high temperature vulcanized silicone rubber, silicone defoamer, preprint ink, powder coating, PVC resin, unsaturated polyester resin thickener, thixotropic agent, pharmaceutical powder, molding preparation, cosmetics, etc. Spherical quartz SiO2 powder is widely used, and its largest application market is its use as electronic packaging material. Electronic packaging is the pillar industry of integrated circuits. With the development of large-scale and very large-scale integrated circuits, integrated circuits become more and more complex, the requirements for packaging materials are higher and higher, and the packaging forms are constantly optimized and updated. The three main materials of electronic packaging are substrate material, plastic packaging material, lead frame and solder. Because plastic packaging has the advantages of low cost, simple process and suitable for mass production, plastic packaging has developed rapidly since its establishment, and its share in packaging is increasing. Now, plastic packaging accounts for 95% of the global integrated circuit market. Among the plastic packaging materials, epoxy plastic packaging material (EMC) is the mainstream of integrated circuit packaging at home and abroad. More than 95% of microelectronic components are encapsulated by epoxy plastic. In microelectronic packaging, it has low moisture resistance and high stress α Radiation, resistance to immersion welding and reflow welding, and good plastic packaging performance. In this regard, epoxy molding compound must add inorganic filler to the resin matrix. At present, almost all inorganic fillers used are fine quartz powder (fine silica powder). With the rapid development of microelectronics industry, large-scale and very large-scale integrated circuits have higher and higher requirements for packaging materials. As an important supporting material of EMC, quartz powder not only requires its particle size to meet the specific packaging range, but also requires its high purity and low content of radioactive elements, especially for the shape of particles.
Price of spherical quartz SiO2 powder
The price of spherical quartz SiO2 powder will change randomly with production cost, transportation cost, international situation and market supply and demand of spherical quartz powder. Tanki new materials Co., Ltd. aims to help all industries and chemical wholesalers find high-quality and low-cost nano materials and chemicals by providing a full range of customized services. If you are looking for spherical quartz SiO2 powder, please feel free to send an inquiry to obtain the latest price of spherical quartz SiO2 powder.
Supplier of spherical quartz SiO2 powder
As a global supplier of spherical quartz powder balls, Tanki new materials Co., Ltd. has rich experience in the performance, application and cost-effective manufacturing of advanced engineering materials. The company has successfully developed a series of powder materials (titanium oxide, silicon oxide, titanium oxide, etc.), high-purity targets, functional ceramics and structural devices, and provided OEM services.
|Spherical Quartz SiO2 Powder Properties|
|Other Names||fused quartz, spherical quartz, spherical SiO2, silica|
|Melting Point||1,600° C (2,912° F)|
|Boiling Point||2,230° C (4,046° F)|
|Solubility in H2O||insoluble|
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