ISSN:
1573-4803
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract Physical properties were used to characterize a range of five, three-component glass formulations (SiO2-K2O-Na2O) synthesized from spray-dried precursor powders in terms of their final bulk chemical compositions. Five specimens per composition were produced by mixing dry glass powder with methyl alcohol to form a slurry, then shaping the slurry in a cylindrical mould, using conventional methods. Specimens were fired under vacuum. Optimum firing conditions for each glass were determined by selecting holding times which produced the maximum Young's modulus. Fracture toughness, K IC, values ranged from 0.92–0.99 MPa m1/2 and Young's modulus, E, values ranged from 45.09–58.06 GPa. Linear regression analyses showed significant correlations between chemical composition and fusion temperature (n=5; P〈0.001), opacity (n=5; P 〈0.01), specific gravity (n=5; P〈0.02), dynamic Young's modulus (n=5; P〈0.01) and fracture toughness (n=30; P〈0.001). The selected physical properties were found to be very sensitive to small variations in chemical composition.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00551904
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