Silicon carbide (SiC) pom zoo hnav thiab tiv thaiv corrosion vim nws lub cev thiab tshuaj lom neeg tshwj xeeb.
Hais txog kev hnav tsis kam, Mohs hardness ntawm silicon carbide tuaj yeem ncav cuag 9.5, thib ob tsuas yog pob zeb diamond thiab boron nitride. Nws hnav tsis kam yog sib npaug rau 266 npaug ntawm cov hlau manganese thiab 1741 npaug ntawm cov chromium siab cam khwb cia hlau.
Nyob rau hauv cov nqe lus ntawm corrosion kuj, silicon carbide muaj cov tshuaj lom neeg ruaj khov heev thiab nthuav tawm zoo heev rau cov kua qaub, alkalis, thiab ntsev daws. Lub caij no, silicon carbide kuj muaj kev tiv thaiv corrosion siab rau molten hlau xws li txhuas thiab zinc, thiab feem ntau yog siv rau hauv crucibles thiab pwm hauv kev lag luam metallurgical.
Tam sim no, silicon carbide ua ke nrog cov qauv superhard thiab nws cov tshuaj inertness tau siv dav hauv kev lag luam xws li mining, steel, thiab chemical, dhau los ua cov khoom siv zoo tshaj plaws hauv kev ua haujlwm hnyav.
| khoom | hnav tsis kam | corrosion kuj | kev ua haujlwm kub kub | Economic (lub sij hawm ntev) |
| Silicon carbide | Siab heev | Muaj zog heev | Zoo heev (℃ 1600) | Siab |
| Alumina ceramics | Siab | Muaj zog | Nruab nrab (＜1200 ℃) | Nruab nrab |
| Hlau alloy | Nruab nrab | Tsis muaj zog (yuav tsum tau txheej) | Tsis muaj zog (xws li oxidation) | Tsis muaj zog |
Silicon carbide hnav-resistant thaivyog ib qho tseem ceeb ntawm cov khoom siv silicon carbide.Qhov hnav-tiv taus thiab corrosion-resistant zog ntawm silicon carbide ua rau nws dav siv nyob rau hauv kev sib tsoo khoom xws li mine crushers thiab pob mills, txo cov khoom siv nquag hloov los ntawm kev hnav thiab yog li txo cov nqi kho tshuab.
Cov hauv qab no yog kev sib piv ntawm silicon carbide hnav-tiv thaiv blocks thiab lwm yam khoom siv tsoos hnav-resistant blocks:
| Hardness thiab hnav tsis kam | Silicon carbide hnav-resistant thaiv | Cov khoom siv niaj hnub |
| Hardness thiab hnav tsis kam | Mohs hardness 9.5, muaj zog hnav tsis kam (lub neej nce 5-10 npaug) | High chromium cam khwb cia hlau tsis tshua muaj hardness (HRC 60 ~ 65), thiab alumina ceramics yog nkig tawg. |
| Corrosion kuj | Resistant rau muaj zog acids thiab alkalis | Cov hlau yog nquag rau corrosion, thaum alumina muaj qhov nruab nrab acid tsis kam |
| Kub kub stability | Kub tiv taus ntawm 1600 ℃, tsis oxidizing ntawm qhov kub thiab txias | Hlau yog nquag deformation ntawm qhov kub thiab txias, thaum alumina muaj qhov kub tsis kam ntawm tsuas yog 1200 ℃ |
| Thermal conductivity | 120 W / m · K, ceev cua sov dissipation, thermal shock kuj | Cov hlau muaj cov thermal conductivity zoo tab sis nws yooj yim rau oxidation, thaum cov ceramics zoo tib yam muaj thermal conductivity tsis zoo |
| Kev lag luam | Ntev lifespan thiab tus nqi qis tag nrho | Cov hlau yuav tsum tau hloov tsis tu ncua, ceramics tsis yooj yim, thiab cov nqi mus sij hawm ntev yog siab |
Lub sij hawm xa tuaj: Mar-18-2025