The glass-ceramics were prepared from basalt as a single raw material using the melting method combined with direct crystallization heat treatment,and different amounts of TiO2 were added.The structure and properties of the basalt glass-ceramics were analyzed by DSC,FE-SEM,XRD and EDS.It was observed that with an increase in TiO2 con-tent,both the glass transition temperature(Tg)and crystallization temperature(Tp)decreased,while the difference be-tween them remained at approximately 50 C.When the TiO2 content ranged from 0％to 3％,a columnar pyroxene mi-crocrystalline phase was predominantly formed in the glass-ceramics,exhibiting complete crystal growth with uniform size and a regular and dense microstructure arrangement.However,when the TiO2 content exceeded 4％,phase separation of ferric titanate microcrystalline phase appeared in the glass-ceramics.Furthermore,it was observed that the volume densi-ty,microhardness,and acid-alkali resistance of microcrystalline glass can increase with the initial rise in TiO2 content,fol-lowed by a subsequent decrease.Specifically,the sample containing 3％TiO2 demonstrated optimal performance charac-teristics including a bulk density of 2.876 g/cm3,a microhardness of 12.0 GPa,as well as the mass loss under acid and al-kali resistance was 0.017 6％and 0.009 6％,respectively.
basaltglass-ceramicsaugiteTiO2 contentstructure and performance
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