Abstract: A method for manufacturing a microcrystalline glass, the microcrystalline glass manufactured according to the method, and a use thereof are provided. The method includes: (1) nucleation of a raw glass sheet, followed by primary crystallization, where: the primary crystallization temperature is x1, the primary crystallization time is t, and the primary crystallization temperature x1 and the primary crystallization time t satisfy the following conditions: first, ?a×t+652?x1??a×t+667, where a is a constant, 0.1?a?0.25, and tis 10 to 300 min; and second, y1=0.0029x1+b, where y1 is the glass density after primary crystallization, and 2.440 g/cm3?y1?2.490 g/cm3, b is a constant, and 0.55?b?0.60; and (2) secondary crystallization of the glass sheet which has been subject to primary crystallization.

Abstract: A salt bath for glass reinforcement, including a nitrate and a metal compound. The mass fraction of the nitrate is not less than 50%, and the nitrate is in a molten state. The metal compound is fused into the nitrate, and the metal compound contains the same metal element as the nitrate. The mass fraction of the metal element in the molecular formula corresponding to the metal compound is greater than the mass fraction in the molecular formula corresponding to the nitrate. Thus, compared with the existing salt bath, under the condition of the same mass, the salt bath can provide more effective amount of metal ions, thereby increasing the strength of glass after reinforcement, and at the same time, the lifetime of the salt bath is increased, reducing the waste of resources and environmental pollution.

Abstract: A glass with a reinforced layer is provided, including a glass body and the reinforced layer formed in a surface of the glass body. The compressive stress of the reinforced layer trends to decrease non-linearly from the surface of the glass body to the interior of the glass body. The compressive stress curve of the reinforced layer has an inflection point. The gradient of a first curve section in front of the inflection point is greater than the gradient of a second curve section behind the inflection point. The overall refractive index of the reinforced layer trends to decrease non-linearly from the surface of the glass body to the interior of the glass body. The refractive index curve of the reinforced layer has at least two inflection points. Furthermore, a method for preparing the glass with a reinforced layer is provided.

Abstract: The present invention relates to glass with a single reinforced layer, comprising a glass body and the single reinforced layer formed in a surface of the glass body. The compressive stress of the single reinforced layer trends to decrease non-linearly from the surface of the glass body to the interior of the glass body. The compressive stress curve of the single reinforced layer has an inflection point. The gradient of a first curve section in front of the inflection point is greater than the gradient of a second curve section behind the inflection point. The overall refractive index of the single reinforced layer trends to decrease non-linearly from the surface of the glass body to the interior of the glass body. The refractive index curve of the single reinforced layer has at least two inflection points. Furthermore, a method for preparing the glass with a single reinforced layer is provided.