The structure and properties of chemical strengthened transparent lithium disilicate glass ceramics with various P2O5 contents

Transparent lithium aluminosilicate glass-ceramics with P2O5 and ZrO2 as nucleating agents were prepared, and the effects of P2O5 contents on the glass network structure, crystallization behavior, and properties were investigated. A small amount of P2O5 addition can improve the Q3 tetrahedral proportion in the glass network. When the amount of P2O5 is 0.8 mol%, the Q3 content increase to 65.6%, facilitating the conversion of Li2SiO3 to Li2Si2O5. The transmittance of glass-ceramics with the main crystalline phases of LiAlSi4O10 and Li2Si2O5 was ∼85% in the visible wavelength range. The transparent glass-ceramics were chemically strengthened by ion-exchanged with NaNO3 and KNO3 mixed molten salt. Their Vicker's hardness and fracture toughness reached 8.87 GPa and 2.87 MPa · M1 / 2, respectively.