Glass and ceramics; History and productionPosted on August 1st, 2008 by Thomson
About 2 millions years ago, people created their first rock instruments. About 10 000 years ago, people began to settle in communities; this is the beginning of agriculture and architecture. First civilisations arised in Egypt, India and China. Nations living there were watching the sun and stars, created simple watches, were able to melt some metals and they knew the secret of ceramics production. Firstly, ceramics were used for food storing purposes as big containers which were placed under ground. Their role was similar to the reason why we use regrigerators nowdays. As time went by, ancient artificers started to decorate the pots with ornaments, paintings which were representing various gods, sports, religions, sacrifice, animals and more. In our experiences, both, greasy clay and dry sand belong to spading much more that to a table in dining room. However, those are the raw materials for production of porcelain dials which we eat from, or bottles and cups which we buy preserved fruits or beverages in. Glass and ceramical materials have some same attributes; they don’t prevent heat and electricity, they have hard face which don’t react with their environment. On the other hand, there exist some differences between glass and ceramic too; Glass is transparent, ceramic isn’t. Unlike ceramics, which stay compact, glass flows during annealing. Glass and ceramic articles are brittle in their usual fashion, however there are procedures to harden their structure.
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