Effects of Different Crystallization Promoters on Crystallization and Mechanical Properties of Red Glass-Ceramics
Using reaction crystallization sintering method,using waste glass powder as the main raw material,changing the addi-tion amount of different pigments(10wt.％,15wt.％,20wt.％)and adding different crystallization promoter(fluoromica,gehlenite and enstatite),red glass-ceramics were prepared.The phase,morphology,and mechanical properties of red glass-ceramics were characterized using X-ray diffraction,scanning electron microscopy,and bending tester.The experimental results show that when no crystallization promoter is added,the main crystalline phase obtained is calcium sodium silicate and quartz;When adding fluoromica,the main precipitation is cuspidine;When adding gehlenite,the main precipitation is wollastonite;When enstatite is added,diopside is mainly precipitated.When adding 20wt.％pigment,a large number of pores appear on the substrate,while adding 15wt.％pigment can obtain glass-ceramics with precipitated crystals tightly bonded to the substrate.Adding three types of crystallization accelerators can increase the fracture modulus of red glass-eramics.The fracture modulus of red glass-ceramics without the addition of crystallization promoter is 35.92 MPa,the fracture modulus of red glass-ceramics with the addition of fluoromica is 40.50 MPa,the fracture modulus of red glass-ceramics with the addition of enstatite is 42.42 MPa,and the fracture modulus of red glass-ceramics with the addition of gehlenite is the highest,reaching 55.01 MPa.
red glass-ceramicsreaction crystallization sintering methodfracture modulus
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