ʻO ka Silicon carbide (SiC) kahi mea seramika i ulu pinepine ʻia e like me ke aniani hoʻokahi no nā noi semiconductor. Ma muli o kāna mau waiwai waiwai a me ka ulu ʻana o ka kristal hoʻokahi, ʻo ia kekahi o nā mea semiconductor lōʻihi loa ma ka mākeke. ʻOi aku ka lōʻihi ma mua o kāna hana uila.
Paʻa kino
Hōʻike maikaʻi ʻia ka lōʻihi o ke kino o SiC ma ka nānā ʻana i kāna mau noi uila ʻole: ka pepa ʻeleʻele, make extrusion, nā papa ʻaʻahu pale pōkā, nā disks pahu hana kiʻekiʻe, a me nā mea puhi ahi. E ʻoki ʻo SiC i kahi mea e kūʻē i ka ʻohi ʻana iā ia iho. Ke hoʻohana ʻia i nā disks brake hana kiʻekiʻe, hoʻāʻo ʻia ko lākou kūʻē ʻana i ka ʻaʻahu lōʻihi i nā wahi paʻakikī. No ka hoʻohana ʻana ma ke ʻano he pāpale pale pale, pono e loaʻa iā SiC ka ikaika kino a me ka ikaika hopena.
Kemika a me ka uila
Kaulana ʻia ʻo SiC no kona ʻano kemika; ʻAʻole pili ʻia e nā kemika ʻoi loa, e like me ka alkali a me nā paʻakai hoʻoheheʻe ʻia, ʻoiai ke ʻike ʻia i nā mahana a hiki i 800 °C. Ma muli o kona kūʻē ʻana i ka hoʻouka ʻana i ke kemika, ʻaʻole corrosive ʻo SiC a hiki ke kū i nā wahi ʻino e like me ka ʻike ʻana i ka ea haʻahaʻa, ka wai paʻakai, a me nā ʻano kemika.
Ma muli o kāna bandgap ikehu kiʻekiʻe, kūʻē loa ʻo SiC i nā haunaele electromagnetic a me nā hopena luku o ka radiation. ʻOi aku ka pale o SiC i ka pōʻino ma nā pae kiʻekiʻe o ka mana ma mua o Si.
ʻO ke kū ʻana i ka haʻalulu wela
ʻO ke kūʻē ʻana o SiC i ka haʻalulu wela kekahi ʻano koʻikoʻi. Ke ʻike ʻia kahi mea i kahi ʻano wela wela loa, hiki mai ka haʻalulu wela (ʻo ia hoʻi, inā ʻokoʻa nā ʻāpana like ʻole o kahi mea i nā wela ʻokoʻa). Ma muli o kēia gradient wela, e ʻokoʻa ka nui o ka hoʻonui a i ʻole ka ʻoki ʻana ma waena o nā ʻāpana like ʻole. Hiki i ka ha'alulu wela ke hana i nā ha'iha'i i nā mea ha'iha'i, akā kū'ē loa ka SiC i kēia mau hopena. ʻO ke kūpaʻa haʻalulu wela o SiC ka hopena o kāna conductivity thermal kiʻekiʻe (350 W / m / K no kahi aniani hoʻokahi) a me ka hoʻonui haʻahaʻa haʻahaʻa i ka hoʻohālikelike ʻana i ka hapa nui o nā mea semiconductor.
Hoʻohana ʻia nā mea uila SiC (e laʻa, MOSFET a me Schottky diodes) i nā noi me nā kaiapuni koʻikoʻi, e like me nā HEV a me nā EV, no ko lākou paʻa. He mea maikaʻi loa ia no ka hoʻohana ʻana i nā noi semiconductor e koi ana i ka paʻakikī a me ka hilinaʻi ma muli o kona kūpaʻa kino, kemika, a me ka uila.
