Influence of Sintering Temperature on Mechanical Properties of Glass-Ceramics Produced with Windshield Waste

Table 2

Average density and standard deviation of the groups.

Group	Composition	Sintering temperature (°C)	Average density (g/cm^3)	Standard deviation (g/cm^3)
1	Glass powder	650	2.433	0.157
2	Glass powder	700	2.216	0.273
3	Glass powder	750	2.091	0.130
4	Glass powder + Nb2O5	650	2.339	0.148
5	Glass powder + Nb2O5	700	2.219	0.219
6	Glass powder + Nb2O5	750	2.173	0.028
7	Glass powder + Nb2O5	600	2.115	0.180
8	Glass powder	800	2.060	0.057