A curved glass and a preparation method is provided. The preparation method for curved glass includes: melting a glass batch into a glass liquid, and clearing the glass liquid; introducing the cleared glass liquid into a mold cavity with a preset shape, and forming, by using a compression molding process, a glass product with a shape corresponding to that of the curved glass, where a size of the glass product is greater than a size of the curved glass; annealing the molded glass product; and processing the annealed glass product into the curved glass based on the shape and the size of the curved glass.

Disclosed in the present invention is a multi-crystal nucleus transparent glass-ceramic and a preparation method therefor, said preparation method comprising the following steps: during glass production, adding a plurality of types of nucleation agents, and after processing, acquiring a mother glass having certain outer dimensions; and placing the mother glass obtained in S2 under a temperature of T1 and heating for 1h-6h to perform annealing treatment, after the annealing treatment is complete, placing under a temperature of T2 and heating 1h-6h to perform nucleation treatment, and after nucleation treatment is complete, placing under a temperature of T3 and heating 0-3h to perform crystallization treatment. T1<T2. The present invention produces a glass-ceramic containing multiple types of crystal nuclei and having crystal phases of lithium disilicate and petalite. The multiple crystal nuclei reduces the nucleation and crystallization energies required for devitrification, thus being able to reduce thermal treatment temperature and time, and adjust the ratio of crystals. The glass-ceramic prepared by means of the present preparation method features an increased damage resistance, good fracture toughness, and a broad application range.

Disclosed in the present invention is a multi-crystal nucleus transparent glass-ceramic and a preparation method therefor, said preparation method comprising the following steps: during glass production, adding a plurality of types of nucleation agents, and after processing, acquiring a mother glass having certain outer dimensions; and placing the mother glass obtained in S2 under a temperature of T1 and heating for 1h-6h to perform annealing treatment, after the annealing treatment is complete, placing under a temperature of T2 and heating 1h-6h to perform nucleation treatment, and after nucleation treatment is complete, placing under a temperature of T3 and heating 0-3h to perform crystallization treatment. T1<T2. The present invention produces a glass-ceramic containing multiple types of crystal nuclei and having crystal phases of lithium disilicate and petalite. The multiple crystal nuclei reduces the nucleation and crystallization energies required for devitrification, thus being able to reduce thermal treatment temperature and time, and adjust the ratio of crystals. The glass-ceramic prepared by means of the present preparation method features an increased damage resistance, good fracture toughness, and a broad application range.