CSIR-CGCRI, India (2013) ENERGY EFFICIENT SODA LIME SILICATE GLASS COMPOSITIONS USING BORAX PENTAHYDRATE. IN301394.

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Abstract

The invention is directed to borax pentahydrate originated boron oxide (B O ) incorporated energy efficient silicate glass compositions 2 3 suitable for manufacturing improved container, float and ophthalmic glasses. The invented glasses have the compositions in the ranges: B O = 7.2-51.7 wt.%, SiO = 22.7-74.4 wt.%, Na O = 13.0-23.5 2 3 2 2 wt.%, CaO = 3.5-10.5 wt.%, K O = 0.03-0.3 wt.%, Al O = 0.15-1.3 2 2 3 wt.%, MgO = 0.43-4.0 wt.%, and Fe O +TiO = 0.05-0.12 wt.%. The 2 3 2 evaluated properties of the glasses have revealed that these invented glasses are suitable for manufacturing improved quality container glasses, float glasses and glasses for ophthalmic lens blanks as well. The addition of borax pentahydrate originated B O at its optimum level (28.5 2 3 – 30.3 wt.% B O ) is found to reduce the glass melting temperature by 2 3 150-2000°C. This lowering of glass melting temperature substantially saves energy and reduces the production cost; hence the compositions are energy efficient and cost effectives. It eliminates the use of soda ash and limestone, so it reduces the carbon dioxide (CO ) emission and 2 thereby global warming; thus these compositions are environmentally friendly as well.

Item Type:	Patent
Uncontrolled Keywords:	SODA LIME SILICATE GLASS, BORAX PENTAHYDRATE
Subjects:	UNSPECIFIED
Divisions:	UNSPECIFIED
Depositing User:	Dr Chandana Patra
Date Deposited:	10 Feb 2021 06:04
Last Modified:	10 Feb 2021 06:04
URI:	http://cgcri.csircentral.net/id/eprint/5000

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