{"id":1396,"date":"2025-01-19T22:50:07","date_gmt":"2025-01-19T14:50:07","guid":{"rendered":"https:\/\/raremetals.royalex.com\/?post_type=product&#038;p=1396"},"modified":"2025-04-25T18:50:05","modified_gmt":"2025-04-25T10:50:05","slug":"silicon-dioxide","status":"publish","type":"product","link":"https:\/\/raremetals.royalex.com\/en\/product\/silicon-dioxide\/","title":{"rendered":"Silicon Dioxide"},"content":{"rendered":"<div class=\"accordion productaccordion\">\t<div id=\"accordion-3966595649\" class=\"accordion-item\">\n\t\t<a id=\"accordion-3966595649-label\" class=\"accordion-title plain active\" href=\"#accordion-item-definition_and_composition\" aria-expanded=\"true\" aria-controls=\"accordion-3966595649-content\" >\n\t\t\t<button class=\"toggle\" aria-label=\"Toggle\"><i class=\"icon-angle-down\"><\/i><\/button>\n\t\t\t<span>Definition and Composition<\/span>\n\t\t<\/a>\n\t\t<div id=\"accordion-3966595649-content\" class=\"accordion-inner\" style=\"display: block;\" aria-labelledby=\"accordion-3966595649-label\" >\n\t\t\tSilicon dioxide (SiO\u2082) is an inorganic compound widely found in nature. It is the main component of sand, quartz, and crystal minerals. Composed of silicon atoms and oxygen atoms bonded together by covalent bonds, silicon dioxide has a relatively simple and stable chemical structure. In its pure form, it appears as a white powder or a colorless, transparent crystalline substance. However, silicon dioxide in nature often exhibits various colors, such as yellow, brown, and black, due to the presence of impurities.\t\t<\/div>\n\t<\/div>\n\t\t<div id=\"accordion-3010011486\" class=\"accordion-item\">\n\t\t<a id=\"accordion-3010011486-label\" class=\"accordion-title plain\" href=\"#accordion-item-physical_properties\" aria-expanded=\"false\" aria-controls=\"accordion-3010011486-content\" >\n\t\t\t<button class=\"toggle\" aria-label=\"Toggle\"><i class=\"icon-angle-down\"><\/i><\/button>\n\t\t\t<span>Physical Properties<\/span>\n\t\t<\/a>\n\t\t<div id=\"accordion-3010011486-content\" class=\"accordion-inner\" aria-labelledby=\"accordion-3010011486-label\" >\n\t\t\t\n<h3>Form and Appearance<\/h3>\n<p> Silicon dioxide exists in multiple forms. Amorphous silicon dioxide, such as that found in diatomite, is typically a white or light yellow powder with a loose texture. Crystalline silicon dioxide, like quartz crystals, has a regular hexagonal columnar shape, is colorless and transparent, and possesses a glassy luster.<\/p>\n<h3>Hardness and Density<\/h3>\n<p> Crystalline silicon dioxide has a high hardness, with a Mohs hardness of around 7, allowing it to leave scratches on many common materials. Its density varies depending on the crystalline form, ranging from 2.2 to 2.65 grams per cubic centimeter.<\/p>\n<h3>Solubility and Melting Point<\/h3>\n<p> Silicon dioxide is almost insoluble in water and common organic solvents, and it is highly chemically stable. It has a high melting point, typically around 1600\u00b0C to 1700\u00b0C, which enables it to maintain structural stability even at high temperatures.<\/p>\n<h3>Optical Properties<\/h3>\n<p> Crystalline silicon dioxide has excellent light transmittance, especially in the visible light range, which is one of the reasons it is used in the manufacture of optical instruments. It also has certain refractive and reflective properties, making it suitable for the design and processing of optical lenses.\t\t<\/div>\n\t<\/div>\n\t\t<div id=\"accordion-1400145554\" class=\"accordion-item\">\n\t\t<a id=\"accordion-1400145554-label\" class=\"accordion-title plain\" href=\"#accordion-item-chemical_properties\" aria-expanded=\"false\" aria-controls=\"accordion-1400145554-content\" >\n\t\t\t<button class=\"toggle\" aria-label=\"Toggle\"><i class=\"icon-angle-down\"><\/i><\/button>\n\t\t\t<span>Chemical Properties<\/span>\n\t\t<\/a>\n\t\t<div id=\"accordion-1400145554-content\" class=\"accordion-inner\" aria-labelledby=\"accordion-1400145554-label\" >\n\t\t\t\n<h3>Stability<\/h3>\n<p> Silicon dioxide is extremely chemically stable. At room temperature and pressure, it does not readily react with most common chemicals such as acids except hydrofluoric acid), bases, and salts. However, it reacts with hydrofluoric acid to produce silicon tetrafluoride gas and water. This unique chemical reactivity is utilized in specific industrial processes.<\/p>\n<h3>Oxidation and Reduction Characteristics<\/h3>\n<p> Silicon in SiO2 is in its highest oxidation state (+4). It is generally very difficult to oxidize further and typically exists as a stable oxide. Only under extreme reducing conditions can it be reduced to elemental silicon or other forms.<br \/>\n\t\t<\/div>\n\t<\/div>\n\t\t<div id=\"accordion-3647605302\" class=\"accordion-item\">\n\t\t<a id=\"accordion-3647605302-label\" class=\"accordion-title plain\" href=\"#accordion-item-special_properties\" aria-expanded=\"false\" aria-controls=\"accordion-3647605302-content\" >\n\t\t\t<button class=\"toggle\" aria-label=\"Toggle\"><i class=\"icon-angle-down\"><\/i><\/button>\n\t\t\t<span>Special Properties<\/span>\n\t\t<\/a>\n\t\t<div id=\"accordion-3647605302-content\" class=\"accordion-inner\" aria-labelledby=\"accordion-3647605302-label\" >\n\t\t\t\n<h3>Adsorption<\/h3>\n<p> Amorphous silicon dioxide has a large specific surface area and porous structure, which gives it good adsorption properties. It can absorb impurities, small molecules, and gases or liquids. For example, diatomite (whose main component is silicon dioxide) is commonly used as an adsorbent for wastewater treatment and air purification.<\/p>\n<h3>Electrical Insulation<\/h3>\n<p> Silicon dioxide is an excellent electrical insulator. It is widely used in electronic component packaging and as an insulating material for electrical wires and cables. Its insulating properties effectively prevent electrical leakage and ensure the safe operation of electrical equipment.<br \/>\n\t\t<\/div>\n\t<\/div>\n\t\t<div id=\"accordion-2021528974\" class=\"accordion-item\">\n\t\t<a id=\"accordion-2021528974-label\" class=\"accordion-title plain\" href=\"#accordion-item-safety_and_stability\" aria-expanded=\"false\" aria-controls=\"accordion-2021528974-content\" >\n\t\t\t<button class=\"toggle\" aria-label=\"Toggle\"><i class=\"icon-angle-down\"><\/i><\/button>\n\t\t\t<span>Safety and Stability<\/span>\n\t\t<\/a>\n\t\t<div id=\"accordion-2021528974-content\" class=\"accordion-inner\" aria-labelledby=\"accordion-2021528974-label\" >\n\t\t\tSilicon dioxide is relatively safe under normal conditions. However, inhaling large amounts of it, especially crystalline dust, can lead to silicosis and other lung diseases. Therefore, strict protective measures are necessary for production and processing operations that generate silicon dioxide dust. If it is not exposed to extremely corrosive environments or subjected to physical damage, silicon dioxide can maintain its stable physical and chemical properties over the long term.<br \/>\n\t\t<\/div>\n\t<\/div>\n\t\t<div id=\"accordion-1901655384\" class=\"accordion-item applicationaccordion\">\n\t\t<a id=\"accordion-1901655384-label\" class=\"accordion-title plain\" href=\"#accordion-item-application_scenarios\" aria-expanded=\"false\" aria-controls=\"accordion-1901655384-content\" >\n\t\t\t<button class=\"toggle\" aria-label=\"Toggle\"><i class=\"icon-angle-down\"><\/i><\/button>\n\t\t\t<span>Application Scenarios<\/span>\n\t\t<\/a>\n\t\t<div id=\"accordion-1901655384-content\" class=\"accordion-inner\" aria-labelledby=\"accordion-1901655384-label\" >\n\t\t\t\n<h3>Electronics and Information Field<\/h3>\n<div class='applicationdiv'>\n<h4>Semiconductor Manufacturing<\/h4>\n<p> In the semiconductor industry, silicon dioxide is an essential base material. It is commonly used as an insulating layer and masking material in semiconductor chip manufacturing. For example, growing a layer of silicon dioxide film on a silicon wafer can effectively isolate different circuit regions, preventing electrical interference. It can also be patterned through photolithography to achieve complex circuit structures within the chip, playing a key role in improving chip performance and reliability.<\/p>\n<h4>Electronic Packaging<\/h4>\n<p> Silicon dioxide is used in electronic component packaging materials due to its excellent electrical insulation and chemical stability. It protects electronic components from environmental influences, such as moisture, dust, and corrosive gases, ensuring the stable operation of electronic devices in various complex environments and extending their service life. It is widely used in the packaging of integrated circuits.\n<\/p><\/div>\n<h3>Building Materials Industry<\/h3>\n<div class='applicationdiv'>\n<h4>Glass Manufacturing<\/h4>\n<p> Silicon dioxide is one of the main raw materials for glass production. When mixed with substances like sodium carbonate and calcium carbonate and subjected to high temperature melting processes, it can be used to produce various types of glass products. These include common flat glass for building windows and automotive windshields, as well as specialty glasses (such as optical glass and tempered glass) for optical instruments and building safety applications.<\/p><\/div>\n\t\t<\/div>\n\t<\/div>\n\t<\/div>","protected":false},"excerpt":{"rendered":"","protected":false},"featured_media":1898,"template":"","meta":[],"product_cat":[148],"product_tag":[],"yoast_head":"<title>\u4e8c\u6c27\u5316\u7845 - Royalex - Rare Metals<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/raremetals.royalex.com\/en\/product\/silicon-dioxide\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u4e8c\u6c27\u5316\u7845 - Royalex - Rare Metals\" \/>\n<meta property=\"og:url\" content=\"https:\/\/raremetals.royalex.com\/en\/product\/silicon-dioxide\/\" \/>\n<meta property=\"og:site_name\" content=\"Royalex - 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