Tailoring the Mechanical Properties of Metaluminous Aluminosilicate Glasses by Phosphate Incorporation

摘要: The characterisation of aluminosilicate glasses is highly relevant in geosciences and for engineering applications such as reinforcement fibres or touchscreen covers. incorporation phosphate a third network-forming species into these offers unique opportunities fine-tuning glass properties via changes structure polymerisation. In this work, we studied melt-quenched within the system SiO2-Al2O3-Na2O-P2O5 with 50 to 70 mol% SiO2 up 7.5 P2O5. All were metaluminous (Al:Na = 1) order maximise degree Increasing content at expense NaAlO2 lead reduced polymerisation density, resulting decrease elastic moduli hardness an increase strain-rate sensitivity. When increasing silica by substituting SiO4 AlO4 tetrahedra, network remained mostly unchanged, confirmed nearly constant molar volume hardness. Densification upon indentation was analysed Raman spectroscopy finite element analysis. We find that phospho-aluminosilicate are governed density Other mechanical underlie more complex structure.