INFLUENCE OF ALUMINA ADDITION ON THE MECHANICAL PROPERTIES OF WINDOW GLASSES FOAMED WITH SODIUM SILICATE

Abstract

In this study, the effect of alumina addition (1-40 wt. %) on the mechanical properties of window glass with 30 wt. % sodium silicate was investigated. Semi-wet mixtures were prepared and shaped and heated in the oven chamber at 800°C for 30 minutes. The microstructures of the glass foam material, densities, phase structures and mechanical strength were determined. Glass foam has a closed pore structure reduced by the amount of alumina addition (pore sizes: 0.5-1 mm) and the mechanical strength was increased up to 10.2 MPa. The foaming rate of the material is almost stayed stable up to 20% alumina incorporation. When the alumina content is 20% ​​by weight, the mechanical strength of the sample is 7.1 MPa, the product has the density of 0.53 g/cm³, water absorption rate is about 1.4%. The high mechanical strength and adequate porosity (79.45%) of this product makes the material as potential to use in the building sector.

Keywords

• Foam glass,Alumina,Addition,Mechanical properties

SODYUM SİLİKAT İLE KÖPÜKLEŞTİRİLMİŞ PENCERE CAMLARINDA ALÜMİNA KATKISININ MİKROYAPIYA ETKİSİ

Abstract

Bu çalışmada, sodyum silikat (ağırlıkça %30 oranında) kullanılarak köpükleştirilen pencere camlarına ağırlıkça %1-40 oranında alümina ilavesinin mikroyapıya etkisi araştırılmıştır. Yarı yaş şekillendirilen karışımlar 800°C de 30 dakika süre ile kamara fırında sinterlenmiştir. Cam köpük malzemelerin mikroyapıları, yoğunlukları, faz yapıları ve mekanik özellikleri belirlenmiştir. Cam köpükler kapalı gözenek yapısına sahip olup gözenek boyutları alümina katkı miktarına bağlı olarak düşmekte (0.5-1 mm) ve malzemenin mekanik mukavemeti 10.2 MPa değerine kadar artmaktadır. Malzemedeki köpükleşme oranı %20 alümina katkı miktarına kadar büyük oranda aynı kalmaktadır. Alümina katkısı ağırlıkça %20 olan numunelerde mekanik dayanım 7.1 MPa, ürünün yoğunluğu 0.53 gr/cm³, su emme oranı %1.4 değerindedir. Yüksek mekanik dayanımı ve yeterli gözenekliliği ile (% 79.45) bu ürün yapı sektörü için potansiyeldir.

Keywords

• Cam köpük,Alümina,Katkı,Mekanik özellikler

References

1. [1] McLellan, G.W., Shand, E.B., Glass Engineering Handbook, McGraw-Hill Book Co., New York, Chapter. 19, (1984).
2. [2]Scheffler, M., Colombo, P., Cellular Ceramics: Structure, Manufacturing, Properties and Applications, Chapter 2.7. Glass Foams, Ed. Giovanni Scarinci, Giovanna Brusatin and Enrico Bernardo, Wiley-VCH Verlag GmbH & Co. KgaA, Published Online: 24 Mar. (2006).
3. [3]Spiridonov, Y.A., Orlova, L.A., Problems of Foam Glass Production, Glass and Ceramics 60 (9–10) (2003).
4. [4]Liu, H., Yang, R., Wang, Y., Liu, S., Influence of Alumina Additions on The Physical and Chemical Properties of Lithium-Iron-Phosphate Glasses, XIII International Conference on the Physics of Noncrystalline Solids, Physics Procedia 48, 17 – 22, (2013). [5]Brow RK., Nature of Alumina in Phosphate Glass: I, Properties of Sodium Alumina phosphate Glass. J Am Ceram Soc, 76(4):913-18, (1993).
5. [6]Liu, H., Yang, R., Wang, Y., Liu, S., Influence of Alumina Additions on the Physical and Chemical Properties of Lithium-iron-phosphate Glasses, Physics Procedia 48, 17 – 22, ( 2013 ).
6. [7]Vereshchagin, V., Sokolova, S., Effect of The Technological Parameters on The Properties of Granular Porous Crystal Glass Material Based on Zeolite-Bearing Rock, Glass and Ceramics 66, 46–49, (2009).
7. [8]Garcia-Ten, J., Saburit, A., Orts, M.J., Bernardo, E., Colombo, P., Glass Foams From Oxidation/Reduction Reactions Using SiC, Si3N4 and AlN Powders, Glass Technology: European Journal of Glass Science and Technology Part A 52 (4), 103–110, (2011).
8. [9]Pokorny, J., Vicenzi, C. Pe´rez, Bergmann, Influence of Heating Rate on The Microstructure of Glass Foams,Waste Managementand Research 29, 172–179, (2011).

9. [10]Bentoa, A, C., Kubaskib, E, T., Sequinelc, T., Pianaroa, S.,A., Varelac, J, A., Tebcherani, S, M., Glass Foam of Macroporosity Using Glass Waste and Sodium Hydroxide as The Foaming Agent, Ceramics International 39, 2423–2430, (2013).
10. [11]Chen, B., Luo, Z., Lu, A., Preparation of Sintered Foam Glass With High Fly Ash Content, Materials Letters 65, 3555–3558, (2011).
11. [12] Zhai, C., Li, Z., Zhu, Y., Zhang, J., Wang, X., Zhao, L., Pan, L., Wang, P., Effects of Sb2O3 on the Mechanical Properties of the Borosilicate Foam Glasses Sintered at Low Temperature, Advances in Materials Science and Engineering, (2014).