Il vetro by Prof.ssa Pesenti https://padlet.com/prof_pesenti/spr6dqn4ydub Made with a taste for adventure en-us 2018-03-07 07:59:23 UTC 2018-03-08 11:08:16 UTC hello@padlet.com IL VETRO prof_pesenti https://padlet.com/prof_pesenti/spr6dqn4ydub/wish/239025778 2018-03-07 08:03:45 UTC https://padlet.com/prof_pesenti/spr6dqn4ydub/wish/239025778 CHE COSA E' prof_pesenti https://padlet.com/prof_pesenti/spr6dqn4ydub/wish/239025816 Materiale di origine minerale, che viene fuso e solidificato.
E' duro, trasparente e fragile.
Conosciuto fin dal III millennio a.C.]]> 2018-03-07 08:03:56 UTC https://padlet.com/prof_pesenti/spr6dqn4ydub/wish/239025816 COME SI PRODUCE prof_pesenti https://padlet.com/prof_pesenti/spr6dqn4ydub/wish/239027040 - materia prima: silice (quarzite)
- si ottiene una sabbia fine e si mescola con sostanze minerali 
-viene fuso a 1200-1500 gradi C
- viene raffreddato a 800 gradi C ottenendo una PASTA VETROSA ( plastica, modellabile)]]> 2018-03-07 08:08:25 UTC https://padlet.com/prof_pesenti/spr6dqn4ydub/wish/239027040 Proprietà prof_pesenti https://padlet.com/prof_pesenti/spr6dqn4ydub/wish/239031568 2018-03-07 08:26:57 UTC https://padlet.com/prof_pesenti/spr6dqn4ydub/wish/239031568 FISICHE prof_pesenti https://padlet.com/prof_pesenti/spr6dqn4ydub/wish/239031747 TRASPARENTE, ISOLANTE, INERTE (resistente a corrosione e agenti chimici)]]> 2018-03-07 08:27:40 UTC https://padlet.com/prof_pesenti/spr6dqn4ydub/wish/239031747 MECCANICHE prof_pesenti https://padlet.com/prof_pesenti/spr6dqn4ydub/wish/239031780 - RESIST. ALLA COMPRESSIONE
- NON RESIST. ALLA TRAZIONE E FLESSIONE
- FRAGILE]]> 2018-03-07 08:27:46 UTC https://padlet.com/prof_pesenti/spr6dqn4ydub/wish/239031780 TECNOLOGICHE prof_pesenti https://padlet.com/prof_pesenti/spr6dqn4ydub/wish/239031804 - FUSIBILE (1200/1500 gradi)
- DUTTILE E MALLEABILE (800 gradi)
- RIFUSIBILE E RICICLABILE AL 100%]]> 2018-03-07 08:27:52 UTC https://padlet.com/prof_pesenti/spr6dqn4ydub/wish/239031804 PRODUZIONE prof_pesenti https://padlet.com/prof_pesenti/spr6dqn4ydub/wish/239033936 2018-03-07 08:36:42 UTC https://padlet.com/prof_pesenti/spr6dqn4ydub/wish/239033936 Produzione del vetro cavo prof_pesenti https://padlet.com/prof_pesenti/spr6dqn4ydub/wish/239037895 ____________________________________________________]]> 2018-03-07 08:52:26 UTC https://padlet.com/prof_pesenti/spr6dqn4ydub/wish/239037895 Produzione del vetro in lastre prof_pesenti https://padlet.com/prof_pesenti/spr6dqn4ydub/wish/239037998 ____________________________________________________]]> 2018-03-07 08:52:51 UTC https://padlet.com/prof_pesenti/spr6dqn4ydub/wish/239037998 Produzione delle fibre di vetro prof_pesenti https://padlet.com/prof_pesenti/spr6dqn4ydub/wish/239038036 ____________________________________________________]]> 2018-03-07 08:53:04 UTC https://padlet.com/prof_pesenti/spr6dqn4ydub/wish/239038036 Produzione del vetro soffiato manualmente prof_pesenti https://padlet.com/prof_pesenti/spr6dqn4ydub/wish/239038115 ____________________________________________________]]> 2018-03-07 08:53:18 UTC https://padlet.com/prof_pesenti/spr6dqn4ydub/wish/239038115