Pulasitiki ikhoza kukhalapo m'chilengedwe kwa zaka 1000, koma galasi ikhoza kukhalapo nthawi yayitali, chifukwa chiyani?

Chifukwa cha kuwonongeka kwakukulu, pulasitiki imakhala kuipitsa kwakukulu.Ngati mukufuna pulasitiki kukhala kuwonongeka kwachilengedwe m'chilengedwe, muyenera zaka 200 ~ 1000.Koma zida zina ndizolimba kuposa pulasitiki, ndipo zimakhalapo nthawi yayitali, ndi galasi.

Pafupifupi zaka 4000 zapitazo, munthu amatha kupanga galasi.Ndipo pafupifupi zaka 3000 zapitazo, Aigupto akale anali odziwa bwino ntchito yowombera magalasi.Tsopano zinthu zambiri zamagalasi mu nthawi zosiyanasiyana zimapezeka ndi akatswiri ofukula zinthu zakale, ndipo zasungidwa bwino, izi zinasonyeza kuti zaka zana zilibe mphamvu pa galasi.Ngati nthawi yayitali, zotsatira zake ndi zotani?

Chofunikira chachikulu chagalasi ndi silika ndi ma oxides ena, siwolimba kristalo wokhala ndi mawonekedwe osakhazikika.

Nthawi zambiri, mamolekyu amadzi ndi gasi amakhala osalongosoka, ndipo olimba amakhala mwadongosolo.galasi ndi lolimba, koma makonzedwe a molekyulu ali ngati madzi ndi mpweya.Chifukwa chiyani?M'malo mwake, dongosolo la ma atomu la galasi ndi losalongosoka, koma ngati muwona atomu imodzi ndi imodzi, ndi atomu imodzi ya silicon yolumikizana ndi maatomu anayi a okosijeni.Kukonzekera kwapadera kumeneku kumatchedwa "short range order".Ichi ndichifukwa chake galasi ndi lolimba koma losalimba.

Kukonzekera kwapadera kumeneku kumapanga galasi ndi kuuma kwakukulu, panthawi imodzimodziyo, mankhwala a galasi ndi okhazikika kwambiri, pafupifupi palibe mankhwala okhudzana ndi galasi ndi zipangizo zina.Choncho ndi kovuta kuti zimbiri kwa galasi mu chilengedwe.

Galasi lalikulu likhoza kusweka kukhala tizidutswa ting'onoting'ono tikamawukiridwa, ndikuukiranso, tizigawo ting'onoting'ono tidzakhala tating'ono, ngakhale tating'ono kwambiri kuposa mchenga.Koma akadali galasi, mawonekedwe ake obadwa nawo sasintha.

Choncho galasi likhoza kukhalapo m’chilengedwe kwa zaka zambirimbiri.