The new type of refractory material is an inorganic non-metallic material with a refractoriness not lower than 1580 ℃, covering natural ores and their processed products. It has excellent high-temperature mechanical properties and volume stability, and is widely used in high-temperature industrial equipment. Its traditional classification is based on chemical properties, including acidic, alkaline, neutral, and aluminum silicate materials. It is also classified by morphology as shaped (such as brick products), amorphous (such as furnace materials, refractory castables, etc.), and cast products. Special refractory materials have evolved into non oxide and composite materials based on traditional ceramics, expanding the technological boundaries.
At the end of the 20th century, China developed multi-component composite systems such as Al ₂ O ∝ - TiO ₂ - SiO ₂ and MgO Al ₂ O ∝ - TiO ₂ systems to meet the needs of high-temperature industries, and used nanotechnology to improve the performance of magnesia carbon bricks. After joining the World Trade Organization, domestic industries have optimized their product structure, upgraded their production lines, and focused on researching and developing high-performance materials containing silicon carbide and nitrides to meet the development needs of the steel industry. The breakthroughs in related technologies cover formula design, process innovation, and application expansion, forming systematic research results.