Inorganic fiber materials are divided into several categories.

　　Inorganic fiber materials, a class of fibrous materials whose basic components are derived from minerals, come in a wide variety of types and find applications across numerous industries. Known for their distinctive physical and chemical properties, these materials excel in areas such as thermal insulation, heat retention, sound absorption, and fire resistance, making them indispensable and essential components in modern industrial and construction sectors. The following sections will explore the classification and key characteristics of inorganic fiber materials in greater detail.

　　1. Fiberglass

　　Fiberglass is a major category of inorganic fibers, primarily produced by drawing molten glass—made from raw glass materials—through high-temperature processes. Depending on the manufacturing techniques and intended applications, fiberglass can be categorized into various forms, such as continuous fiberglass, chopped fiberglass, fiberglass yarns, and fiberglass fabrics. Known for its exceptional mechanical properties—like high strength, high modulus, excellent corrosion resistance, and superior thermal stability—fiberglass is widely used in fields such as construction reinforcement materials, composite manufacturing, electronics, and transportation. Additionally, fiberglass boasts remarkable insulation and sound-absorbing qualities, making it an ideal material for thermal insulation, heat retention, and noise control applications.

　　II. Quartz Glass Fiber

　　Quartz glass fiber is an inorganic fiber made from high-purity quartz sand through a specialized manufacturing process. Compared to conventional glass fiber, quartz glass fiber boasts superior resistance to high temperatures, enabling it to maintain stable physical and chemical properties even under extreme heat conditions. As a result, quartz glass fiber is widely used in high-temperature applications such as aerospace, nuclear industries, and metallurgy—serving as a critical material for insulation, thermal protection, and corrosion resistance.

　　3. Boron Fibers

　　Boron fiber is a high-performance inorganic material known for its exceptionally high strength and modulus, as well as its outstanding resistance to high temperatures and ablation. Although the manufacturing process of boron fiber is complex and costly, its superior properties make it an essential material in fields such as aerospace and defense industries. In critical components like rocket engine casings, missile bodies, and aircraft structural parts, boron fiber significantly enhances the load-bearing capacity and extends the service life of these vital elements.

　　4. Ceramic Fiber

　　Ceramic fiber is an inorganic fiber made primarily from inorganic oxides such as alumina and silica, produced by melting these materials at high temperatures and then drawing them into fine strands. Characterized by excellent high-temperature resistance, outstanding thermal and chemical stability, and a low thermal conductivity, ceramic fiber is widely used in applications like thermal insulation for high-temperature furnaces and kilns, heat protection for industrial equipment, and high-temperature filtration systems. Additionally, ceramic fiber boasts superior sound-absorbing properties, making it ideal for noise control applications.

　　5. Metal Fibers

　　Metal fibers are fiber-shaped materials with a high metal content, characterized by the continuous distribution of metallic components. Not only do they retain the excellent properties of metals—such as high strength and toughness—but they also inherit the flexibility and ease of weaving inherent to fibrous materials. Depending on the type of metal used, metal fibers can be categorized into aluminum fibers, copper fibers, stainless steel fibers, and more. These fibers hold unique application value in fields like electromagnetic shielding, electrical and thermal conductivity, and filtration/separation. For instance, aluminum fiber sound-absorbing panels combine the exceptional strength of metal with the sound-dampening capabilities of fibers, making them an ideal choice for interior decoration and noise control applications.

　　6. Composite Inorganic Fibers

　　In addition to the aforementioned single-component inorganic fibers, there is also a class of composite inorganic fibers, which contain two or more distinct components within the same fiber cross-section. These composite inorganic fibers are produced through specialized processes that combine materials with differing properties, resulting in innovative materials boasting enhanced, multifunctional performance characteristics. For instance, combining glass fibers with ceramic fibers can leverage the strengths of both materials, improving the material’s resistance to high temperatures as well as its mechanical strength. Meanwhile, blending metal fibers with ceramic fibers allows for an ideal integration of electrical and thermal conductivity alongside excellent heat insulation and dielectric properties.

　　7. Other Inorganic Fibers

　　In addition to the major categories mentioned above, inorganic fibers also include various types such as rock wool, slag wool, and basalt fiber. Although these materials differ in composition and performance, they all share common characteristics typical of inorganic fibers—such as excellent thermal insulation properties, moderate sound absorption and noise reduction capabilities, and outstanding chemical stability and fire resistance. As a result, they play a crucial role in applications like building insulation, industrial heat protection, and noise control.