ʻO Vanadium pentoxide (V₂O₅) kekahi o nā catalysts i hoʻohana nui ʻia i nā kaʻina hana ʻoihana, ʻoi aku ka nui o ka hana ʻana i ka waikawa sulfuric a me nā ʻano hopena oxidation. ʻO kāna mau waiwai kemika kūʻokoʻa, kūpaʻa, a me ka hiki ke hoʻomaʻamaʻa i nā hopena redox i koho maikaʻi loa no ka catalysis. Ke ʻimi nei kēia ʻatikala i nā kumu ma hope o ka hoʻohana ʻana o V₂O₅ ma ke ʻano he catalyst, kāna mau hana o ka hana, kāna mau noi ma nā ʻoihana like ʻole, a me ka wā e hiki mai ana o ka catalysis-based vanadium.

ʻO ka metala silikon 553 he mea hoʻoheheʻe silika maʻemaʻe kiʻekiʻe i hoʻohana nui ʻia i nā ʻoihana ʻoihana he nui no kāna mau waiwai kino a me ke kemika. ʻO kāna mea nui he 98.5% silicon, me kahi liʻiliʻi o ka hao a me ka aluminika, e hiki ai i ka silicon metala 553 ke mālama i ka ikaika maikaʻi a me ka pale ʻana i ka corrosion i nā wahi wela kiʻekiʻe. E ʻimi ana kēia ʻatikala i nā kikoʻī i nā hoʻohana nui o ka metala silicon 553, me nā alumini alumini, semiconductors, nā ʻoihana photovoltaic, a me nā ʻoihana kemika.

ʻO ka pauka metala silika he ʻano silika maikaʻi, maʻemaʻe kiʻekiʻe i hana ʻia ma o ka hōʻemi ʻana o ka silica i loko o nā kapuahi uila. Loaʻa iā ia ka luster metala a loaʻa i nā ʻāpana like ʻole, kūpono ia no nā ʻano hana. ʻO Silicon ka lua o ka mea nui loa i loko o ka ʻāʻī o ka honua a lawelawe ʻo ia ma ke ʻano he kumu koʻikoʻi ma nā ʻāpana he nui, ʻo ia hoʻi i ka ʻenehana semiconductor, ikehu lā, a me ka metallurgy.

ʻO ka pauka metala silikon he mea maʻalahi me ka nui o nā noi i nā ʻoihana like ʻole. ʻO nā waiwai kūʻokoʻa o ka pauka metala silicon he mea waiwai nui ia no nā huahana a me nā kaʻina hana. Ma kēia ʻatikala, e ʻimi mākou i nā waiwai koʻikoʻi o ka pauka metala silika a e ʻimi i kāna mau noi like ʻole.

ʻO Ferrosilicon kahi mea koʻikoʻi i hoʻohana ʻia i ka hana ʻana i ke kila a me nā metala ʻē aʻe. Hoʻokumu ʻia ia me ka hao a me ke silika, me nā ʻano mea like ʻole e like me ka manganese a me ke kalapona. ʻO ke kaʻina hana o ka ferrosilicon e hoʻemi i ka quartz (silicon dioxide) me ka coke (carbon) i mua o ka hao. Pono kēia kaʻina hana i nā wela kiʻekiʻe a he ikaika ka ikehu, e hana ana i nā kumukūʻai maka i mea nui i ka hoʻoholo ʻana i ke kumukūʻai holoʻokoʻa o ka ferrosilicon.

Hoʻohana nui ʻia ka Ferrosilicon i ka ʻoihana kila, ka ʻoihana foundry a me nā hana ʻoihana ʻē aʻe. Hoʻopau lākou ma mua o 90% o ka ferrosilicon. Ma waena o nā helu like ʻole o ka ferrosilicon, ʻo 75% ferrosilicon ka mea i hoʻohana nui ʻia. I ka ʻoihana kila, e pili ana i ka 3-5kg 75% ferrosilicon e hoʻopau ʻia no kēlā me kēia ton o ke kila i hana ʻia.

ʻO Ferrosilicon nitride a me ka silicon nitride kani like ʻelua mau huahana like loa, akā ʻoiaʻiʻo, ʻokoʻa lākou. E wehewehe kēia ʻatikala i ka ʻokoʻa ma waena o nā ʻaoʻao ʻelua.

Hoʻopili pinepine ʻia nā huila tungsten-hao i nā ʻāpana i haku ʻia me tungsten (W) a me ka hao (Fe). ʻO ka'ōlelo maʻamau,ʻaʻole magnetik nā tungsten-hao.

ʻAʻole magnetic ka Titanium. ʻO kēia no ka mea he ʻano aniani ka titanium me ka ʻole o nā electrons i hui ʻole ʻia, pono ia no kahi mea e hōʻike ai i ka magnetism. ʻO ia ke ʻano ʻaʻole pili ka titanium me nā māla magnetic a manaʻo ʻia he mea diamagnetic.