A na-ekewa ihe mkpuchi silicon carbide n'ụdị ihe mkpuchi ọkara na ụdị ihe na-eduzi. Ugbu a, nkọwapụta bụ isi nke ngwaahịa ihe mkpuchi silicon carbide nke ọkara-insulated bụ sentimita 4. N'ahịa ihe mkpuchi silicon carbide nke na-eduzi, nkọwapụta ngwaahịa ihe mkpuchi ukwu dị ugbu a bụ sentimita 6.
N'ihi ngwa ndị dị n'okpuru ala na mpaghara RF, ihe ndị e ji SiC kpuchie ọkara na ihe ndị e ji epitaxial rụọ na-achịkwa mbupụ site na Ngalaba Azụmaahịa nke US. SiC nke e ji semi insulated mee dị ka substrate bụ ihe a na-ahọrọ maka GaN heteroepitaxy ma nwee atụmanya dị mkpa maka ngwa na microwave field. Ma e jiri ya tụnyere kristal na-adịghị mma nke sapphire 14% na Si 16.9%, enweghị mmachi kristal nke ihe SiC na GaN bụ naanị 3.4%. Tinyere ya na oke okpomọkụ dị elu nke SiC, LED dị elu na GaN elu ugboro na ngwa microwave dị elu nke ọ kwadebere nwere nnukwu uru na radar, ngwa microwave dị elu na sistemụ nkwukọrịta 5G.
Nnyocha na mmepe nke ihe mkpuchi SiC nke nwere ọkara mkpuchi abụrụla isi ihe nnyocha na mmepe nke ihe mkpuchi SiC nke nwere otu kristal. E nwere isi ihe abụọ dị mkpa n'ịkọ ihe SiC nke nwere ọkara mkpuchi:
1) Belata ihe ndị na-adịghị mma nke onye nyere onyinye N nke graphite crucible, ihe na-eme ka ihe na-ekpo ọkụ na-abanye na ntụ ntụ;
2) Ọ bụ ezie na ejiri kristal ahụ hụ na ihe ndị dị na ya dị mma ma dịkwa n'ime ya, a na-etinye etiti dị n'ime ala iji kwụọ ụgwọ maka ihe ndị na-adịghị ọcha dị n'ime ala fọdụrụ site na iji ọrụ eletriki.
Ugbu a, ndị nrụpụta nwere ikike mmepụta SiC nke nwere ọkara mkpuchi bụ SICC Co, Semisic Crystal Co, Tanke Blue Co, Hebei Synlight Crystal Co., Ltd.
A na-enweta kristal SiC conductive site na itinye nitrogen n'ime ikuku na-eto eto. A na-ejikarị ihe mkpuchi silicon carbide conductive eme ihe na mmepụta ngwaọrụ ike, ngwaọrụ ike silicon carbide nwere nnukwu voltaji, nnukwu ọkụ eletrik, oke okpomọkụ, oke ugboro, obere mfu na uru ndị ọzọ pụrụ iche, ga-eme ka ojiji dị ugbu a nke ngwaọrụ ike dabere na silicon ka mma nke ukwuu, nwere mmetụta dị ukwuu na mpaghara nke mgbanwe ike dị irè. Ebe ndị bụ isi eji eme ihe bụ ụgbọ ala eletrik/ikpo chaja, ike ọhụrụ fotovoltaic, ụgbọ okporo ígwè, grid smart na ndị ọzọ. N'ihi na ihe ndị na-eduga bụ ngwaọrụ ike na ụgbọ ala eletrik, fotovoltaic na ubi ndị ọzọ, atụmanya ngwa ahụ sara mbara, ndị nrụpụta dịkwa ọtụtụ.
Ụdị kristal silicon carbide: Enwere ike kewaa ụdị kristal silicon carbide kristal kacha mma nke 4H n'ime ụdị abụọ, otu bụ ụdị kristal silicon carbide cubic nke nhazi sphalerite, nke a maara dị ka 3C-SiC ma ọ bụ β-SiC, nke ọzọ bụkwa nhazi hexagonal ma ọ bụ diamond nke nhazi oge buru ibu, nke a na-ahụkarị 6H-SiC, 4H-sic, 15R-SiC, wdg, nke a maara dịka α-SiC. 3C-SiC nwere uru nke iguzogide dị elu na ngwaọrụ mmepụta. Agbanyeghị, oke enweghị nkwekọ dị n'etiti Si na SiC lattice constants na coefficients mgbasawanye okpomọkụ nwere ike ibute ọtụtụ ntụpọ na oyi akwa epitaxial 3C-SiC. 4H-SiC nwere nnukwu ikike n'ịmepụta MOSFETs, n'ihi na uto kristal ya na usoro uto oyi akwa epitaxial ya dị mma karịa, ma n'ihe gbasara mmegharị elektrọn, 4H-SiC dị elu karịa 3C-SiC na 6H-SiC, na-enye njirimara microwave ka mma maka 4H-SiC MOSFETs.
Ọ bụrụ na enwere mmebi iwu, hichapụ kọntaktị
Oge ozi: Julaị-16-2024