Council of Scientific and Industrial Research

Navin Chandra

Sudhir Sitaram Amritphale

Barada Kanta Mishra

Mohammed Akram Khan

Manish Mudgal

Ramesh Kumar Chouhan

Deepti Mishra

Narayanrao Ramakrishnan

Swati Lahiri

The present invention provides a composition for advanced hybrid geopolymeric functional materials possessing very broad application spectrum ranging from cementitious materials to advanced functional materials having 'Inorganic-Organic Hybrid' matrix in contrast to the limited application of conventional geopolymeric materials having 'Inorganic matrix' only. The invention further relates to a process for the preparation of these materials. The process obviates the need of external addition of sodium silicate which is one of the costliest and main raw materials in conventional geopolymerisation processes. Interestingly, in the present invention the sodium silicate has been synthesized in situ by designing of conditions for synergistic and simultaneous mechano-chemical reactions among the selected raw materials viz. inorganic and organic wastes under alkaline environment. This results in the formation of &#x201c;Hybrid inorganic-organic frame work&#x201d; of sodium silicate, which facilitates uniform dispersion of reacting species, thus resulting in the formation of homogeneous geopolymeric matrix with improved characteristics.

Composition for advanced hybrid geopolymeric functional materials and a process for the preparation thereof

A low temperature process for making radiopac materials is disclosed. The process utilizes industrial/agricultural waste as raw materials and includes mixing 11-88% w/w of the industrial/agricultural waste materials, 11-88% w/w of an alkali or alkaline earth metal compound and 7-15% w/w of a phosphatic binder to obtain a homogenized mixture. The homogenized mixture is compressed at a pressure in the range of 100-300 Kg/cmto obtain compacted green material samples. The compacted green material samples are baked for 1-3 hours in an Air oven in the temperature range of 90-130&#xb0; C., and are sintered at a temperature in the range of 920 to 1300&#xb0; C. for a soaking period of 1-3 hours under air environment in a muffle furnace to obtain the radiopac material.

Low temperature process for making radiopac materials utilizing industrial/agricultural waste as raw material

Growing community of inventors

Bhopal, India

Navin Chandra