二氧化硅SiO2的用途及物理性质
二氧化硅SiO2的用途及物理性质
二氧化硅SiO2 规格：1-3mm/2-4mm
SiO2又称硅石。在自然界分布很广，如石英、石英砂等。白色或无色，含铁量较高的是淡黄色。密度2.2 ～2.66.熔点1670℃（鳞石英）；1710℃（方石英）。沸点2230℃，相对介电常数为3.9。不溶于水微溶于酸，呈颗粒状态时能和熔融碱类起作用。用于制玻璃、水玻璃、陶器、搪瓷、耐火材料、硅铁、型砂、单质硅等
二氧化硅SiO2的用途及物理性质
Application and Physical Properties of SiO_2
二氧化硅SiO2的用途及物理性质
Application and Physical Properties of SiO_2
二氧化硅SiO2 规格：1-3mm/2-4mm
SiO 2 SiO 2 Specification: 1-3mm/2-4mm
SiO2又称硅石。在自然界分布很广，如石英、石英砂等。白色或无色，含铁量较高的是淡黄色。密度2.2 ～2.66.熔点1670℃（鳞石英）；1710℃（方石英）。沸点2230℃，相对介电常数为3.9。不溶于水微溶于酸，呈颗粒状态时能和熔融碱类起作用。用于制玻璃、水玻璃、陶器、搪瓷、耐火材料、硅铁、型砂、单质硅等。
SiO 2 is also called silica. It is widely distributed in nature, such as quartz and quartz sand. White or colorless, the higher iron content is pale yellow. The density ranges from 2.2 to 2.66. The melting point is 1670 ("squarry") and 1710 ("cristobalite"). The boiling point is 2230 C and the relative dielectric constant is 3.9. It is insoluble in water and slightly soluble in acid, and can function with molten alkali when it is in granular state. It is used for making glass, sodium silicate, pottery, enamel, refractory, ferrosilicon, moulding sand, elemental silicon, etc.
二氧化硅SiO2用途：
Use of SiO 2:
硅标准液。水玻璃，硅的化合物的制备材料。在晶体管和集成电路中作杂质扩散的掩蔽膜和保护层,制成二氧化硅膜作集成电路器件。玻璃工业。
Silicon standard solution. Sodium silicate, the preparation material of silicon compounds. In transistors and integrated circuits, silicon dioxide films are used as masking and protective layers for impurity diffusion. Glass industry.
SiO₂中Si—O键的键能很高，熔点、沸点较高（熔点1723℃，沸点2230℃）。
The bond energy of Si-O bond in SiO ramming is very high, the melting point and boiling point are high (melting point 1723 C, boiling point 2230 C).
SiO₂ + 4HF = SiF4↑ + 2H₂O
SiO tamping + 4HF = SiF4+2H tamping O
酸氧通性：
Oxyacid permeability:
二氧化硅与碱性氧化物
Silica and Alkaline Oxides
SiO₂ + CaO =（高温） CaSiO3
SiO ramming + CaO = CaSiO 3 (high temperature)
二氧化硅能溶于浓热的强碱溶液：
Silica can be dissolved in concentrated alkali solution:
SiO₂ + 2NaOH = Na2SiO3 + H₂O
SiO tamping + 2NaOH = Na2SiO 3 + H tamping O
（盛碱的试剂瓶不能用玻璃塞而用橡胶塞的原因）
(Reasons for the use of rubber stoppers instead of glass stoppers in alkali-containing reagent bottles)
在高温下，二氧化硅能被碳、镁、铝还原：
At high temperatures, silicon dioxide can be reduced by carbon, magnesium and aluminium.
SiO₂+2C=（高温）Si+2CO
SiO ramming+2C=(high temperature)Si+2CO
二氧化硅SiO2物理性质：
Physical properties of SiO 2:
二氧化硅又称硅石，化学式SiO₂。自然界中存在有结晶二氧化硅和无定形二氧化硅两种。 结晶二氧化硅因晶体结构不同，分为石英、鳞石英和方石英三种。纯石英为无色晶体，大而透明棱柱状的石英叫水晶。若含有微量杂质的水晶带有不同颜色，有紫水晶、茶晶、墨晶等。普通的砂是细小的石英晶体，有黄砂(较多的铁杂质)和白砂(杂质少、较纯净)。二氧化硅晶体中，硅原子的4个价电子与4个氧原子形成4个共价键，硅原子位于正四面体的中心，4个氧原子位于正四面体的4个顶角上，SiO₂是表示组成的最简式，仅是表示二氧化硅晶体中硅和氧的原子个数之比。二氧化硅是原子晶体。
Silica, also known as silica, is chemically compacted with SiO. There are two kinds of crystalline silica and amorphous silica in nature. Crystalline silica can be divided into quartz, squarrite and cristobalite because of its different crystal structure. Pure quartz is a colourless crystal. Large and transparent prismatic quartz is called crystal. If the crystal containing trace impurities has different colors, there are amethyst, tea crystal, ink crystal and so on. Ordinary sand is fine quartz crystal, with yellow sand (more iron impurities) and white sand (less impurities, more pure). In silicon dioxide crystals, four valence electrons of silicon atoms form four covalent bonds with four oxygen atoms. Silicon atoms are located at the center of the tetrahedron, four oxygen atoms are located at the four apex angles of the tetrahedron. SiO ramming is the simplest formula for the composition of silicon and oxygen atoms in silicon dioxide crystals. Silica is an atomic crystal.
自然界存在的硅藻土是无定形二氧化硅，是低等水生植物硅藻的遗体，为白色固体或粉末状，多孔、质轻、松软的固体，吸附性强。
Diatomite in nature is amorphous silica, the remains of diatom of lower aquatic plants. It is white solid or powder, porous, light, soft solid, and has strong adsorption.
公司以“新概念、新技术、新产品”以“追求客户满意程度”为目标。致力推行IS9001质量管理体系,并已获得多项专利。经过多年的努力,已经开发、生产可供精密光学应用的高纯度、高密度、单体的SiO2.
The company aims at "new concepts, new technologies and new products" and "customer satisfaction". Committed to the implementation of IS9001 quality management system, and has won a number of patents. After years of efforts, SiO 2 with high purity, high density and monomer has been developed and manufactured for precision optical applications.
