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Alex Duran Carmona                                                               8-10-12



Tria 4 invents que t’hagin interessat i fes una explicació de 2 fulls cada un :

Pólvora:

Es va inventar a la Xina al s.IX. S’utilitzava sobretot per la pirotécnia encara que al s.XIII
es va utilizar amb finalitats militars.

Composició:

Estava composta per carbó, sofre i nitrat de potasi, en diferents proporcions. La
pólvora moderna (sense fum) utilitza materials energetics.

Introducció a Europa:

Es va introduir a Europa gràcies als àrabs i els bizantins al voltant de l’any 1200.

A la península Iberica, els àrabs la van utilizar amb finalitats militars a la batalla
d’Algeciras o en la defensa de Huelva davant dels cristians.

Al 1334 es va començar a fabricar a Anglaterra i al 1340 a Alemanya.

Al 1403 es va utilitzar per derribar les fortificacions de la ciutat de Pissa, ja que va ser
l’únic explosiu fins, aproximadament, l’any 1628 quan va aparèixer l’or fulminant que
es va utilitzar en les diferents guerres d’Europa.

Funcionament:

El carbó i el sofre es cremen gràcies al nitrat potàsic, que subministra oxígen perquè es
pugui duu a terme la combustió. Hi ha uns altres tipus de pólvora feta amb clorat

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Treball tecno 4t eso

  • 1. Alex Duran Carmona 8-10-12 Tria 4 invents que t’hagin interessat i fes una explicació de 2 fulls cada un : Pólvora: Es va inventar a la Xina al s.IX. S’utilitzava sobretot per la pirotécnia encara que al s.XIII es va utilizar amb finalitats militars. Composició: Estava composta per carbó, sofre i nitrat de potasi, en diferents proporcions. La pólvora moderna (sense fum) utilitza materials energetics. Introducció a Europa: Es va introduir a Europa gràcies als àrabs i els bizantins al voltant de l’any 1200. A la península Iberica, els àrabs la van utilizar amb finalitats militars a la batalla d’Algeciras o en la defensa de Huelva davant dels cristians. Al 1334 es va començar a fabricar a Anglaterra i al 1340 a Alemanya. Al 1403 es va utilitzar per derribar les fortificacions de la ciutat de Pissa, ja que va ser l’únic explosiu fins, aproximadament, l’any 1628 quan va aparèixer l’or fulminant que es va utilitzar en les diferents guerres d’Europa. Funcionament: El carbó i el sofre es cremen gràcies al nitrat potàsic, que subministra oxígen perquè es pugui duu a terme la combustió. Hi ha uns altres tipus de pólvora feta amb clorat