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A polycrystalline novel silicate material obtained by crystallizing glass under the action of a catalyst or a nucleating agent, is a dense, nonporous, homogeneous mixture of a crystalline phase and a residual glass phase. Generally, the size of the crystal can range from nanometer to micrometer, and the number of crystals can reach 50% to 90%. Has high mechanical strength, low electrical conductivity, high dielectric constant, good machinability, chemical resistance, thermal stability and so on. These properties depend on the type and amount of crystals, as well as the composition and properties of the remaining glass phase, and are closely related to the crystallization conditions and the like. According to different nucleation or crystallization treatment, it is divided into photosensitive and heat-sensitive glass-ceramics. Can be used to make circuit boards, charge storage tubes, screens for photomultiplier tubes, missile warheads, radomes, bearings, pumps, reactor neutron absorbing materials, insulating pillars, etc.