[Nkọwa nkọwa] Nrụgide ikuku gbajirisilicon carbidebụ carbide na-abụghị ọla jikọtara ya na silicon na carbon covalent bond, na ike ya bụ nke abụọ na diamond na boron carbide. Usoro kemịkalụ bụ SiC. Kristal na-enweghị agba, acha anụnụ anụnụ na oji n'ọdịdị mgbe oxidized ma ọ bụ nwere adịghị ọcha.
Nrụgide ikuku gbajirisilicon carbidebụ carbide na-abụghị ọla nwere silicon na carbon covalent bond, na ike ya bụ nke abụọ naanị diamond na boron carbide. Usoro kemịkalụ bụ SiC. Kristal na-enweghị agba, acha anụnụ anụnụ na oji n'ọdịdị mgbe oxidized ma ọ bụ nwere adịghị ọcha. Nrụrụ nkesilicon carbidena nhazi diamond ka a na-akpọkarị emery. Isi ike nke emery dị nso na diamond, ezigbo nkwụsi ike na-ekpo ọkụ, kwụsie ike na hydroxy acid aqueous solution na sulfuric acid gbadoro ụkwụ, yana enweghị nguzozi na acid agwakọtara ma ọ bụ phosphoric acid nke hydrogen acid na nitric acid. Alkalis na-agbaze na ikuku ikuku dị iche. A na-ekewa ya na sịntetiksilicon carbidena eke silicon carbide. A na-ahụkarị silicon carbide, nke a maara dị ka carbonite, na kimberlite na amphibolite nke mgbawa ugwu, mana ego ya dị ntakịrị na enweghị uru ngwuputa.
Nrụgide ikuku nke ụlọ ọrụ gbajirisilicon carbidebụ ngwakọta nke -SiC na -SiC wee bịa na agba abụọ: ojii na akwụkwọ ndụ akwụkwọ ndụ. Carbide silicon dị ọcha enweghị agba, nwere adịghị ọcha bụ oji, akwụkwọ ndụ akwụkwọ ndụ, acha anụnụ anụnụ, odo. Oghere ọka hexagonal na cubic, kristal bụ efere, kọlụm mejupụtara. Glass luster, density 3.17-3.47G/CM3, Morse hardness 9.2, microscope nwekwara na 30380 ~ 33320MPa agbaze: ikuku 2050 malitere iche, mgbake ikuku 2600 malitere iche. Ọnụego mgbanwe bụ 466, 480MPa. Ike ike bụ 171.5MPa. Ike mkpakọ bụ 1029MPa. Ọnụ ọgụgụ mgbasawanye ahịrị ahịrị bụ (25 ~ 1000) 5.010 ~ 6/, na conductivity thermal (20) bụ 59w / (mk). Nkwụsi ike kemịkalụ, esi na HCI, H2SO4, HF agaghị emebi.
Dabere na ojiji dị iche iche, a na-ekewa nrụgide ikuku sintered silicon carbide n'ime abrasive, data refractory, deoxidizer, silicon carbide eletriki na ihe ndị ọzọ. Ọdịnaya SiC nke silicon carbide abrasive agaghị erughị 98%. A na-ekewa refractories nwere silicon carbide n'ime: (1) data refractory dị elu silicon carbide, ọdịnaya SiC ya bụ otu ihe ahụ na-egweri silicon carbide. (2) data refractory nke abụọ silicon carbide ojii, ọdịnaya SiC karịa 90%. (3) Ọdịnaya nke carbide silicon ojii na SiC na refractories dị ala erughị 83%. Ọdịnaya nke silicon carbide na SiC eji na deoxidizer na-achọkarị karịa 90%. Otú ọ dị, carbon ulo oru graphitization ọkụ mkpuchi, silicon carbide ọdịnaya nke ihe karịrị 45% nke ọgwụgwọ nwekwara ike iji dị ka ígwè deoxidizer. Silicon carbide maka deoxidizing agent nwere ụdị ntụ ntụ abụọ na ngọngọ ịkpụzi. Ntụ ntụ deoxidizer ojii silicon carbide n'ozuzu nwere urughuru size nke 4 ~ 0.5 mm na 0.5 ~ 0.1 mm. Ngwa eletriki silicon carbide nwere ụdị isi abụọ. (1) The green silicon carbide eji maka eletriki kpo oku bụ n'ezie otu ihe na-acha akwụkwọ ndụ akwụkwọ ndụ carbide na-egweri. (2) Silicon carbide maka onye na-ejide ihe nwere ọrụ eletrik pụrụ iche chọrọ, nke dị iche na silicon carbide maka ichi data refractory.
Ojiji nke ikuku ikuku sintered carbide
Ngwaahịa ikuku sintered silicon carbide nwere ọrụ pụrụ iche dị ka nguzogide okpomọkụ dị elu, na-eyi nguzogide, nguzogide ọkụ, nguzogide ọkụ, nguzogide radieshon, ọmarịcha ọkụ eletrik na ọkụ, wdg, ejirila ya na ngalaba dị iche iche nke akụ na ụba mba. Na China, a na-ejikarị silicon carbide na-acha akwụkwọ ndụ akwụkwọ ndụ eme ihe dị ka abrasive. A na-eji carbide silicon oji eme nkume egweri, nke a na-ejikarị egbutu ma na-egweri ihe ndị nwere ike dị ala, dị ka iko, ceramik, nkume, refractories, nakwa maka ịkwanye akụkụ nke nkedo na ihe ndị na-abụghị ígwè. A na-ejikarị ihe egweri nke silicon carbide na-acha akwụkwọ ndụ na-egweri eme ihe maka egweri carbide cimented, titanium alloy, glass optical, nakwa maka egweri nke cylinder liner na ngwa nchara dị elu. A na-eji abrasives silicon carbide abrasives eme ihe naanị maka ịhịhịa obere bea dị obere. Enwere ike imeziwanye ihe mgbochi nke ndị na-ebu turbine site n'itinye ntụ ntụ SIC na ha site na electroplating. N'iji nrụgide igwe na-ebugharị cubic SiC200 igwe na W28 micro-ntụ ntụ na mgbidi cylinder nke n'ime engine combustion, ndụ cylinder nwere ike karịa okpukpu abụọ.
Oge nzipu: Ọktoba 11-2023