Ka hoʻohana ʻana a me ka holomua noiʻi o ka uhi ʻana o SiC i nā mea kahua wela kalapona/kalapona no ka silicon-1 monocrystalline

Ua lilo ka hana mana photovoltaic solar i ʻoihana ikehu hou loa o ka honua. Ke hoʻohālikelike ʻia me nā cell solar polysilicon a me amorphous silicon, ʻo ka monocrystalline silicon, ma ke ʻano he mea hana mana photovoltaic, he kiʻekiʻe ka pono hoʻololi photoelectric a me nā pono kalepa koʻikoʻi, a ua lilo ia i mea nui o ka hana mana photovoltaic solar. ʻO Czochralski (CZ) kekahi o nā ʻano hana nui e hoʻomākaukau ai i ka monocrystalline silicon. ʻO ka haku mele ʻana o ka umu monocrystalline Czochralski e pili ana i ka ʻōnaehana umu, ka ʻōnaehana vacuum, ka ʻōnaehana kinoea, ka ʻōnaehana kahua wela a me ka ʻōnaehana hoʻomalu uila. ʻO ka ʻōnaehana kahua wela kekahi o nā kūlana koʻikoʻi no ka ulu ʻana o ka monocrystalline silicon, a ʻo ka maikaʻi o ka monocrystalline silicon e pili pono ana i ka hoʻolaha ʻana o ka gradient mahana o ke kahua wela.

ʻO nā ʻāpana kahua wela ua haku ʻia me nā mea kalapona (nā mea graphite a me nā mea hui kalapona/kalapona), i māhele ʻia i nā ʻāpana kākoʻo, nā ʻāpana hana, nā mea hoʻomehana, nā ʻāpana pale, nā mea hoʻokaʻawale wela, a pēlā aku, e like me kā lākou mau hana, e like me ka mea i hōʻike ʻia ma ke Kiʻi 1. Ke hoʻomau nei ka nui o ka silicon monocrystalline, ke piʻi nei hoʻi nā koi nui no nā ʻāpana kahua wela. ʻO nā mea hui kalapona/kalapona ke koho mua no nā mea kahua wela no ka silicon monocrystalline ma muli o kona kūpaʻa dimensional a me nā waiwai mechanical maikaʻi loa.

I ke kaʻina hana o ka silicon monocrystalline czochralcian, ʻo ka heheʻe ʻana o ka mea silicon e hana i ka mahu silicon a me ka silicon splash heheʻe, e hopena ana i ka silicification erosion o nā mea kahua wela kalapona/kalapona, a ua pilikia nui nā waiwai mechanical a me ke ola lawelawe o nā mea kahua wela kalapona/kalapona. No laila, pehea e hōʻemi ai i ka silicification erosion o nā mea kahua wela kalapona/kalapona a hoʻomaikaʻi i ko lākou ola lawelawe ua lilo ia i kekahi o nā hopohopo maʻamau o nā mea hana silicon monocrystalline a me nā mea hana mea kahua wela kalapona/kalapona.ʻO ka uhi ʻana o ka silikona carbideua lilo i koho mua no ka pale ʻana i ka uhi ʻili o nā mea kahua wela kalapona/kalapona ma muli o kona kūpaʻa haʻalulu wela maikaʻi loa a me ke kūpaʻa ʻana i ka ʻaʻahu.

Ma kēia pepa, e hoʻomaka ana mai nā mea kahua wela kalapona/kalapona i hoʻohana ʻia i ka hana ʻana o ka silicon monocrystalline, ua hoʻolauna ʻia nā ʻano hoʻomākaukau nui, nā pono a me nā hemahema o ka uhi ʻana o ka silicon carbide. Ma kēia kumu, ua nānā ʻia ka noi a me ka holomua o ka noiʻi ʻana o ka uhi ʻana o ka silicon carbide i nā mea kahua wela kalapona/kalapona e like me nā ʻano o nā mea kahua wela kalapona/kalapona, a ua hāʻawi ʻia nā manaʻo a me nā kuhikuhi hoʻomohala no ka pale ʻana i ka uhi ʻili o nā mea kahua wela kalapona/kalapona.

1 ʻenehana hoʻomākaukau ouhi ʻana i ka silicon carbide

1.1 Ke ʻano hoʻokomo

Hoʻohana pinepine ʻia ke ʻano hoʻokomo e hoʻomākaukau i ka uhi o loko o ka silicon carbide i loko o ka ʻōnaehana mea hui C/C-sic. Hoʻohana mua kēia ʻano hana i ka pauka hui ʻia e kāʻei i ka mea hui kalapona/kalapona, a laila hana i ka mālama wela ma kahi mahana. Hana ʻia kahi moʻo o nā hopena physico-chemical paʻakikī ma waena o ka pauka hui ʻia a me ka ʻili o ka laʻana e hana i ka uhi. ʻO kona pono, ʻo ia ka maʻalahi o ke kaʻina hana, hoʻokahi wale nō kaʻina hana e hiki ai ke hoʻomākaukau i nā mea hui matrix paʻa, ʻaʻohe māwae; Hoʻololi liʻiliʻi ka nui mai ka preform a i ka huahana hope loa; Kūpono no kekahi ʻano i hoʻoikaika ʻia e ka fiber; Hiki ke hoʻokumu ʻia kahi gradient haku mele ma waena o ka uhi a me ka substrate, kahi i hui maikaʻi ʻia me ka substrate. Eia nō naʻe, aia kekahi mau hemahema, e like me ka hopena kemika ma ke kiʻekiʻe o ka mahana, hiki ke hōʻino i ka fiber, a me ka emi ʻana o nā waiwai mechanical o ka matrix kalapona/kalapona. He paʻakikī ke kāohi i ka like ʻana o ka uhi, ma muli o nā mea e like me ke kaumaha, ka mea e hoʻolilo ai i ka uhi i ʻole like.

1.2 Ke ʻano uhi slurry

ʻO ke ʻano uhi slurry, ʻo ia ke kāwili ʻana i ka mea uhi a me ka mea hoʻopaʻa i loko o kahi hui, e palaki like ma luna o ka ʻili o ka matrix, ma hope o ka maloʻo ʻana i ka lewa inert, e sintered ka specimen i uhi ʻia i ka mahana kiʻekiʻe, a hiki ke loaʻa ka uhi e pono ai. ʻO nā pono, he maʻalahi ke kaʻina hana a maʻalahi hoʻi e hana, a he maʻalahi ka hoʻomalu ʻana i ka mānoanoa o ka uhi; ʻO ka hemahema, ʻaʻole ikaika ka hoʻopaʻa ʻana ma waena o ka uhi a me ka substrate, a ʻaʻole maikaʻi ke kūpaʻa ʻana o ka thermal shock o ka uhi, a haʻahaʻa ke ʻano o ka uhi.

1.3 Ke ʻano hana hoʻoheheʻe kemika

ʻO ke ʻano hana hoʻoheheʻe kemika (CVR) kahi ʻano hana e hoʻoheheʻe i ka mea silicon paʻa i loko o ka mahu silicon ma kahi mahana, a laila hoʻolaha ka mahu silicon i loko o ka ʻili o loko a me ka ʻili o ka matrix, a hana ma kahi me ke kalapona i loko o ka matrix e hana i ka silicon carbide. ʻO kona mau pono e komo pū me ka lewa like i loko o ka umu, ka wikiwiki o ka hana like a me ka mānoanoa o ka waiho ʻana o nā mea i uhi ʻia ma nā wahi āpau; He maʻalahi a maʻalahi hoʻi ke kaʻina hana e hana, a hiki ke hoʻomalu ʻia ka mānoanoa o ka uhi ʻana ma ka hoʻololi ʻana i ke kaomi mahu silicon, ka manawa waiho ʻana a me nā palena ʻē aʻe. ʻO ka hemahema, ua hoʻopilikia nui ʻia ka laʻana e ke kūlana i loko o ka umu, a ʻaʻole hiki i ke kaomi mahu silicon i loko o ka umu ke hiki i ka likelike theoretical, e hopena ana i ka mānoanoa o ka uhi ʻana.

1.4 Ke ʻano hoʻokomo mahu kemika

ʻO ka hoʻokaʻawale mahu kemika (CVD) kahi hana e hoʻohana ʻia ai nā hydrocarbons ma ke ʻano he kumu kinoea a me ka N2/Ar maʻemaʻe kiʻekiʻe ma ke ʻano he kinoea lawe e hoʻokomo i nā kinoea i hui ʻia i loko o kahi mea hana mahu kemika, a ua hoʻokaʻawale ʻia nā hydrocarbons, synthesized, diffused, adsorbed a hoʻonā ʻia ma lalo o kekahi mahana a me ke kaomi e hana i nā kiʻiʻoniʻoni paʻa ma luna o ka ʻili o nā mea hui kalapona/kalapona. ʻO kona pono, hiki ke hoʻomalu ʻia ka nui a me ka maʻemaʻe o ka uhi ʻana; He kūpono hoʻi ia no ka ʻāpana hana me ke ʻano paʻakikī; Hiki ke hoʻomalu ʻia ke ʻano kristal a me ke ʻano o ka ʻili o ka huahana ma ka hoʻoponopono ʻana i nā palena hoʻokaʻawale. ʻO nā hemahema, ʻo ia ka haʻahaʻa loa o ka helu hoʻokaʻawale, paʻakikī ke kaʻina hana, kiʻekiʻe ke kumukūʻai hana, a aia paha nā hemahema uhi, e like me nā māwae, nā hemahema mesh a me nā hemahema ʻili.

I ka hōʻuluʻulu manaʻo, ua kaupalena ʻia ke ʻano hoʻokomo i kona mau ʻano ʻenehana, kahi kūpono no ka hoʻomohala ʻana a me ka hana ʻana i nā hale hana a me nā mea liʻiliʻi; ʻAʻole kūpono ke ʻano uhi no ka hana nui ʻana ma muli o kona kūlike ʻole. Hiki i ke ʻano CVR ke hoʻokō i ka hana nui ʻana o nā huahana nui, akā he kiʻekiʻe aʻe nā koi no nā lako a me ka ʻenehana. ʻO ke ʻano CVD kahi ʻano kūpono no ka hoʻomākaukau ʻanaUhi ʻana SIC, akā ʻoi aku ke kiʻekiʻe o kona kumukūʻai ma mua o ke ʻano CVR ma muli o kona paʻakikī i ka kaohi ʻana i ke kaʻina hana.