Toughened glass ceramic with high strength and application thereof

The invention provides toughened glass ceramic with high strength and application thereof. The toughened glass ceramic comprises a main crystal phase (Zn, Mg) Al2O4 crystal phase and a secondary crystal phase tetragonal ZrO2 crystal phase. The strengthened glass ceramic includes a compressive stress layer region extending from a surface of the strengthened glass ceramic to a depth of compression, and has a tensile stress layer region inside the strengthened glass ceramic. The compressive stress layer depth DOL0 of the toughened glass ceramic is greater than or equal to 0.21 t, t is the thickness of the toughened glass ceramic, | CTAV | is greater than or equal to 70 MPa, and the toughened glass ceramic is endowed with a specific stress structure by meeting the DOL0 and | CTAV |, so that the toughened glass ceramic has excellent drop impact resistance and high mechanical strength. 本申请提供了一种具有高强度的强化玻璃陶瓷及其应用，该强化玻璃陶瓷中包含主要晶相(Zn，Mg)Al2O4晶相和次要晶相四方ZrO2晶相。该强化玻璃陶瓷包含从强化玻璃陶瓷的表面延伸到压缩深度的压缩应力层区域，并且在强化玻璃陶瓷的内部具有张应力层区域。该强化玻璃陶瓷的