Core Viewpoint - The article discusses the differences between quartz powder and silica micro powder, including their production methods, physical and chemical properties, and application fields. Group 1: Definitions and Production - Quartz powder is a coarser form of SiO2 obtained by crushing quartz ore, while silica micro powder is a finer form produced through grinding or chemical methods to achieve high purity [1] - Micro silica, also known as silica fume, is a byproduct of industrial processes, specifically from the collection of smoke dust in smelting plants, containing about 90% SiO2 [3] - White carbon black is produced through chemical methods and can achieve a purity of up to 99% with particle sizes ranging from 10 to 20 nm [3] Group 2: Historical Context - The earliest silica micro powder originated from dust collected from steel plant chimneys, primarily used in the refractory materials industry in the early 1990s [4] - In the late 1990s, the rapid development of the electronic circuit board industry in China led to the ultra-fine purification of quartz powder, which became known as silica micro powder [5] Group 3: Physical and Chemical Properties - Both silica micro powder and quartz powder are fine materials with particle sizes typically below 1 micron, but they differ in physical properties; silica micro powder is lighter and less dense, while quartz powder is denser [7] - Chemically, silica micro powder is a form of SiO2 with a non-crystalline structure and many active surface groups, whereas quartz powder is made from crushed crystalline quartz [7] Group 4: Application Fields - Silica micro powder is widely used in electronics, optics, ceramics, cosmetics, coatings, and plastics to enhance material stability, reduce costs, and improve processing performance [7] - Quartz powder is primarily used in glass, ceramics, cement, building materials, and metal surface coatings due to its high hardness and chemical stability [7]