Why can silica be used as a flow aid to increase the fluidity of powder?
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Author : Lzh
Update time : 2023-02-05 12:17:19
What is Silicon Dioxide? Silicon dioxidehas relatively stable chemical properties and does not react with water. It has high fire resistance, high-temperature resistance, low coefficient of thermal expansion, high insulation, corrosion resistance, piezoelectric effect, resonance effect, and unique optical properties. It is an acid oxide. It does not react with ordinary acids. Hydrofluoric acid reacts with silicon dioxide to form gaseous silicon tetrafluoride. It reacts with a hot concentrated alkali solution or molten alkali to form Silicon dioxide and water. It reacts with various metal oxides to form Silicon Dioxide at high temperatures. Silicon Dioxide is inert. It does not react with halogen, hydrogen halide, sulfuric acid, and nitric acid except with fluorine, hydrogen fluoride, and Perchloric acid action (except hot concentrated phosphoric acid). The common concentrated phosphoric acid (or pyrophosphoric acid) can corrode silicon dioxide at high temperatures and generate heteropoly acids. The molten borate or boric anhydride can corrode silicon dioxide at high temperatures. Given this property, borate can be used as a flux in ceramic firing. In addition, hydrogen fluoride can also dissolve the acid of silicon dioxide and generate water-soluble fluorosilicic acid.
Preparation method of Silicon Dioxide The preparation of Silicon Dioxide includes five steps, namely, the preparation of Silicon Dioxide based gel, granulation process, sintering process, cleaning process, and drying process 1. Preparation of Silicon Dioxide gel: Silicon tetrachloride to produce Silicon Dioxide gel, or organic silicon compounds such as tetraethoxysilane to produce Silicon Dioxide gel, or use gaseous Silicon Dioxide to produce Silicon Dioxide gel 2. Granulation process: the Silicon Dioxide gel is dried to become a dry powder. After crushing the dry powder, it is graded to obtain the desired average particle size of Silicon Dioxide powder 3. Sintering process: the silicon dioxide powder obtained in the granulation process is sintered at a temperature of 800 ℃~1450 ℃. The spheroidizing process of thermal plasma is used to heat and melt the silicon dioxide powder obtained in the sintering process at a predetermined supply rate in a plasma torch that is introduced with argon at a predetermined flow rate and generates plasma at a predetermined high-frequency output power 4: The cleaning process removes the micro-powder attached to the surface of spheroidized Silicon Dioxide powder after the above spheroidization process 5. Drying process: dry the Silicon Dioxide powder after the above cleaning process.
Uses of Silicon Dioxide Silicon dioxide is an important raw material for manufacturing optical fiber. Generally speaking, relatively pure timely glass can be used to manufacture timely glass. The expansion coefficient of timely glass is very small, equivalent to 1/18 of ordinary glass. It can withstand severe temperature changes and has good acid resistance (except HF). Therefore, timely glass is often used to manufacture high-temperature resistant, chemical instruments. Quartz sand is often used as glass raw materials and building materials.
Price of Silicon Dioxide Silicon Dioxide particle size and purity will affect the product's price, and the purchase volume can also affect the cost of Silicon Dioxide. A large amount of large amount will be lower. The price of Silicon Dioxide can be found on our company's official website.
Silicon Dioxide supplier Luoyang Tongrun Nano Technology Co. Ltd. (TRUNNANO) Luoyang City, Henan Province, China, is a reliable and high-quality global chemical material supplier and manufacturer. It has more than 12 years of experience providing ultra-high quality chemicals and nanotechnology materials, including Silicon Dioxide, nitride powder, graphite powder, sulfide powder, and 3D printing powder. If you are looking for high-quality and cost-effective Silicon Dioxide, you are welcome tocontact usor inquire at any time.
