Silicate product and strengthening method thereof

A glass composition consisting of SiO2, Al2O3, Na2O, K2O, MgO, ZrO2 and Sro,

• wherein the content of Al2O3 is 15-28 parts by weight, the content of Na2O is 13-25 parks by weight, the content of K2O is 6-15 parts by weight, the content of MgO is 7-16 parts by weight, and the content of ZrO2 is 0.1-5 parts by weight, relative to 100 parts by weight of SiO2;
• and wherein the glass composition has an M value of 5-13, as calculated by the following formula (1):
• M=P1*wt(Na2O)+P2*wt(K2O)+P3*wt(MgO)+P4*wt(ZrO2)−P5*wt(Al2O3)*wt(Al2O3) (1)
• wherein wt (Na2O) represents the part by weight of Na2O relative to 100 parts by weight of SiO2,
• wt (K2O) represents the part of by weight of K2O relative to 100 parts by weight of SiO2,
• wt (MgO) represents the part of by weight of MgO relative to 100 parts by weight of SiO2,
• wt (ZrO2) represents the part of by weight of ZrO2 relative to 100 parts by weight of SiO2, and
• wt (Al2O3) represents the part of by weight of Al2O3 relative to 100 parts by weight of SiO2;
• and wherein P1 has a value of 053, P2 has a value of 0.153, P3 has a value of 0.36, P4 has a value of 0.67, and P5 has a value of 0.018,
• wherein the change in the value of M is presented as a curve having an optimal point value, and
• wherein the composition prevents rapid cracking and spontaneous burst after collision, or slow cracking after the collision;
• the content of SrO being more than 0 and less than 0.6 parts by weight, relative to 100 parts by weight of SiO2.

A glass composition consisting of SiO2, Al2O3, Na2O, K2O, MgO, ZrO2 and CaO,

• wherein the content of Al2O3 is 15-28 parts by weight, the content of Na2O is 13-25 parks by weight, the content of K2O is 6-15 parts by weight, the content of MgO is 7-16 parts by weight, and the content of ZrO2 is 0.1-5 parts by weight, relative to 100 parts by weight of SiO2;
• and wherein the glass composition has an M value of 5-13, as calculated by the following formula (1):
• M=P1*wt(Na2O)+P2*wt(K2O)+P3*wt(MgO)+P4*wt(ZrO2)−P5*wt (Al2O3)*wt(Al2O3) (1)
• wherein wt (Na2O) represents the part by weight of Na2O relative to 100 parts by weight of SiO2,
• wt (K2O) represents the part of by weight of K2O relative to 100 parts by weight of SiO2,
• wt (MgO) represents the part of by weight of MgO relative to 100 parts by weight of SiO2,
• wt (ZrO2) represents the part of by weight of ZrO2 relative to 100 parts by weight of SiO2, and
• wt (Al2O3) represents the part of by weight of Al2O3 relative to 100 parts by weight of SiO2;
• and wherein P1 has a value of 053, P2 has a value of 0.153, P3 has a value of 0.36, P4 has a value of 0.67, and P5 has a value of 0.018,
• wherein the change in the value of M is presented as a curve having an optimal point value, and
• wherein the composition prevents rapid cracking and spontaneous burst after collision, or slow cracking after the collision;
• the content of BaO being more than 0 and less than 0.5 parts by weight, and the content of CaO being more than 0 and less than 0.5 parts by weight, relative to 100 parts by weight of SiO2.