Chemical Formula | Na2SiF6 |
Molar Mass | 188.055 g/mol |
Appearance | white, free - flowing powder |
Density | 2.676 g/cm³ |
Melting Point | decomposes at about 300 °C |
Solubility In Water | slightly soluble in water, solubility is about 0.44 g/100 mL at 25 °C |
Odor | odorless |
Ph Of Solution | acidic in water |
Crystal Structure | cubic |
Stability | stable under normal conditions |
What are the main uses of Sodium Silico Fluoride?
Sodium fluorosilicate (Sodium Silico Fluoride) has a wide range of uses. In the field of industry, it is often used as an auxiliary for glass manufacturing. When glass is made, adding this substance can improve the properties of glass, make it more heat-resistant and wear-resistant, and help glass melt, reduce energy consumption, and improve production efficiency.
In enamel production, sodium fluorosilicate is also indispensable. It can make the enamel glaze smoother and brighter, enhance its adhesion to metal substrates, and make enamel products more beautiful and durable.
In addition, in the water treatment industry, it can be used as a fluorinating agent for water. Adding an appropriate amount can prevent dental caries and protect people's dental health. Under specific water quality conditions, the concentration of fluoride ions in water can be adjusted to ensure water safety.
Above agriculture, sodium fluorosilicate is also useful. It can be used as a raw material for pesticides and fungicides to control diseases and pests and ensure the healthy growth of crops. When used, it can be used to control the dose to avoid damage to crops and the environment.
In the metallurgical industry, it can participate in the process of metal surface treatment, improve metal surface characteristics, enhance metal corrosion resistance, and extend the life of metal products. In short, sodium fluorosilicate has important functions in various industries and is relied on by industrial production and people's lives.
What are the precautions for Sodium Silico Fluoride during use?
Sodium silica fluoride, when using, there are several ends that need to be added. The first priority is safety protection, which is the most important thing. Its nature may be harmful to certain, and contact with the human body can cause damage to the skin and eyes. Therefore, when using, it is necessary to wear protective equipment, such as gloves, goggles, etc., to avoid direct contact.
Furthermore, pay attention to its storage conditions. It should be placed in a dry, cool and well-ventilated place, away from fire and heat sources. If it is not stored properly, it may deteriorate, affect the effectiveness of use, or even cause danger.
Also, during use, strictly follow the operating procedures. Precisely control the dosage, do not increase or decrease at will. Excessive use may cause adverse consequences. In industrial production or other application scenarios, it can affect the quality of the product, or cause damage to the environment.
And the operating environment also needs to be paid attention to to to ensure good ventilation to prevent the accumulation of harmful gases. If used in large quantities in a confined space, the gas may be diffused, or personal safety may be endangered.
Furthermore, after use, properly dispose of the remaining items and utensils. Do not discard at will, should be handled according to the prescribed law, so as not to pollute the environment. Wash the utensils used for next use. In this way, the use of sodium silica fluoride can be safe and secure, and the intended purpose can be achieved.
What are the Physical and Chemical Properties of Sodium Silico Fluoride?
Sodium fluorosilicate, its physical state is usually white crystalline powder, odorless. Melting point is quite high, about 1500 ℃, stable at room temperature and pressure. Slightly soluble in water, in acid will decompose and release hydrogen fluoride gas.
Sodium fluorosilicate is chemically stable, and it is not easy to react with common substances under normal conditions. Its aqueous solution is slightly acidic, because fluorosilicate ions will partially hydrolyze. In case of strong acid, the reaction is violent, generating corresponding salts, water and hydrogen fluoride gas. At high temperatures, it can react with metal oxides to form fluorine-containing metal salts.
Because of its certain characteristics, it is widely used in industrial fields. For example, as an enamel flux, it can reduce the firing temperature of enamel and improve the quality and luster of enamel; in glass production, it can be used as a whitening agent to make the glass appear milky white; it is also used as an agricultural insecticide to repel and poison certain pests; in drinking water treatment, appropriate addition can prevent dental caries.
What is the production process of Sodium Silico Fluoride?
The process of making sodium silica fluoride is very delicate. At the beginning, it is necessary to prepare all kinds of raw materials. Sodium is often taken from sodium salts, such as sodium chloride, which is pure and easy to obtain, and is widely used. The source of silicon is mostly silica or silicide, which is finely ground to make its particle size uniform and convenient for subsequent reactions. Fluorides are often selected from sodium fluoride, hydrofluoric acid, etc., which are all active and can be quickly mixed with others.
As for the reaction environment, most of them are selected from special reactors. The material of the kettle needs to be corrosion-resistant to prevent material damage. First dissolve the sodium salt into an appropriate amount of solvent, often using water as a medium, stir it well to make a clear liquid. Then slowly add the silicon source. During this time, it is advisable to control the temperature. At the beginning, it is slightly lower, about 30 or 40 degrees, to promote the gradual fusion of the two phases and prevent excessive reaction.
When the sodium salt and the silicon source are slightly mixed, fluoride is slowly added. At this time, the reaction becomes more and more enthusiastic, and the temperature also rises gradually. It is necessary to strictly monitor the temperature, not to exceed 100, in order to prevent the material from decomposing or clumping. At the same time, stir vigorously to ensure that all things blend seamlessly and the reaction is uniform.
After the reaction is completed, the resulting mixed liquid contains sodium silica fluoride, but there are still miscellaneous materials and by-products. To carry out the separation technique, the method of filtration and centrifugation is often used to remove its solid impurities. The filtrate is distilled and crystallized to precipitate the crystals of sodium silica fluoride. The newly obtained crystals or containing impurities can be redissolved and recombined to improve their purity.
At the end, the refined sodium silica fluoride is placed in a dry place to prevent it from being damp and deteriorating. This process is interlinked and rigorous step by step to obtain high-quality sodium silica fluoride.
What is the market price range of Sodium Silico Fluoride?
Sodium fluorosilicate, the price between markets, often varies with quality, supply and demand, time and place, and it is difficult to determine the exact number.
If the price is considered, the quality is excellent, and in a place where supply and demand are smooth and the market is stable, the price per hundred catties may be around 200 silver. However, if there is a difference in quality, or the supply exceeds demand, the price may fluctuate, and it is unknown that the price will drop to 150 or 60 silver per hundred catties. On the contrary, if the demand is strong and the supply is tight, the price will rise, or to 230 or 40 silver per hundred catties.
And the origin is far and near, which is also related to the price. The origin is close to the freight province, and the price is slightly cheaper; the origin is far and the transportation is difficult, and the cost is high, and the price will increase. As time goes by, so does the price. In the year of abundance, the price tends to decline; in the year of regret, the stock is thin, and the price tends to rise.
As for its wide use, it is needed in the making of glass and the making of porcelain glaze, which also makes the price change in the industry. If you want to know the exact price, you must carefully check the market conditions and quality before you can get it.