Synthesis and studies on microhardness of alkali zinc borate glasses

The mixed alkali effect on zinc borate glasses have been reported. The glass systems of nominal composition 10Zn+xLi2O+yNa2O+80B2O3 (x = y = 0, 5, 10, 15 mol%) were prepared using standard melt quenching method. The structural, physical and mechanical properties of the samples have been studied usin...

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Bibliographic Details
Main Authors: Subhashini, Bhattacharya Soumalya, Shashikala, H D, Udayashankar, N K
Format: Conference Proceeding
Language:English
Subjects:
ANISOTROPY
BORATES
Boron
CONCENTRATION RATIO
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
DENSITY
Density measurement
Diamond pyramid hardness
GLASS
Hardness measurement
LITHIUM OXIDES
MATERIALS SCIENCE
Mechanical properties
MICROHARDNESS
Mixed alkali effect
Molar volume
SODIUM OXIDES
SYNTHESIS
VICKERS HARDNESS
X-RAY DIFFRACTION
Zinc borate
ZINC COMPOUNDS
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Summary:The mixed alkali effect on zinc borate glasses have been reported. The glass systems of nominal composition 10Zn+xLi2O+yNa2O+80B2O3 (x = y = 0, 5, 10, 15 mol%) were prepared using standard melt quenching method. The structural, physical and mechanical properties of the samples have been studied using X-ray diffraction(XRD), density measurement and Vickers hardness measurement, respectively. A consistent increase in the density was observed, which explains the role of the modifiers (Li2O and Na2O) in the network modification of borate structure. The molar volume is decreasing linearly with the alkali concentration, which is attributed to the conversion of tetrahedral boron (BO4/2)− into (BO3/2)−. The microhardness studies reveals the anisotropy nature of the material. It further confirms that the samples belong to hard glass category.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.4872742