Dab tsi yog cov khoom tseem ceeb ntawm silicon carbide thiab lawv siv dab tsi?

Silicon carbide cov khoom tuaj nyob rau hauv ntau hom, tsim siv silicon carbide raw cov ntaub ntawv thiab ntau yam kev ua. Silicon carbide cov khoom tuaj yeem muab faib ua ntau pawg, nrog rau ntau hom kev siv sib txawv. Yog li dab tsi yog cov khoom tseem ceeb ntawm silicon carbide thiab lawv siv? Hnub no, peb yuav qhia lawv rau koj!

Hom thiab Kev Siv Cov Khoom Siv Silicon Carbide:

1. Kev lag luam hlau khoom

Silicon carbide cov khoom siv nws cov cua kub tsis kam, siab zog, zoo heev thermal conductivity, thiab tej yam kuj zoo li siab - kub indirect cua sov cov ntaub ntawv, xws li nyob rau hauv ntsug fractionation furnaces, distillation ntauwd tais, txhuas electrolytic hlwb, tooj liab forging rauv linings, zinc hmoov rauv arc daim hlau, thermocouple raj, thiab lwm yam.

2. Kev siv cov khoom siv Silicon Carbide hauv kev lag luam hlau

Siv silicon carbide corrosion kuj, thermal poob siab tsis kam, hnav tsis kam, thiab zoo tshav kub hloov khoom, nws yog siv nyob rau hauv ob sab phlu ntawm loj - nplai hlau blast furnaces mus cuag lawv cov kev pab cuam lub neej. Siv nws cov hluav taws kub hloov pauv coefficient, cov khoom siv hluav taws xob zoo heev, thiab lub zog hluav taws xob siab, silicon carbide yog siv los ua cov khoom nyias nyias - phaj hlau kiln rooj tog. Qhov no tsis yog tsuas yog txo qhov ntim ntawm cov rooj tog zaum xwb tab sis kuj txhim kho lub peev xwm thauj khoom thiab cov khoom lag luam zoo ntawm cov kilns, ua kom lub sijhawm ua haujlwm luv. Nws yog ib qho khoom siv zoo tshaj plaws rau kev tua cov ceramic glazes.

3. Kev siv cov khoom siv Silicon Carbide hauv Metallurgical thiab Mineral Processing Industries

Silicon carbide muaj lub zog thib ob rau pob zeb diamond thiab muaj zog hnav tsis kam. Nws yog ib qho khoom siv zoo heev rau hnav- cov kav dej resistant, centrifugal impellers, twj tso kua mis, hydrocyclones, thiab ore hopper hauv ob sab phlu. Nws hnav tsis kam yog 5-20 npaug ntawm npua hlau thiab yas, ua rau nws yog ib qho khoom siv zoo tshaj plaws rau kev siv aerospace.

Kev siv hauv cov ceramics thiab kev sib tsoo log kev lag luam: Siv nws cov coefficient ntawm cov cua kub hloov pauv, cov khoom siv hluav taws xob zoo heev, thiab lub zog hluav taws xob siab, silicon carbide yog siv los ua cov khoom nyias nyias - phaj hlau kiln rooj tog. Qhov no tsis yog tsuas yog txo qhov ntim ntawm cov rooj tog zaum xwb tab sis kuj txhim kho lub peev xwm thauj khoom thiab cov khoom lag luam zoo ntawm cov kilns, ua kom lub sijhawm ua haujlwm luv. Nws yog ib qho khoom siv zoo tshaj plaws rau kev tua cov ceramic glazes.

Silicon carbide cov khoom tuaj yeem muab faib ua ntau hom, nyob ntawm qhov kev thov scenario. Lawv feem ntau siv ntau dua hauv cov cuab yeej siv tshuab. Cov lus saum toj no yog cov lus qhia ntxaws txog "Dab tsi yog cov yam ntxwv tseem ceeb thiab kev siv tseem ceeb ntawm cov khoom siv silicon carbide?"

Cov yam ntxwv thiab kev sib xyaw ua ke ntawm cov khoom siv Silicon Carbide

Silicon carbide raw cov ntaub ntawv muaj cov ntsiab lus melting ntau dua, feem ntau siab dua 3000 degree, xws li TiC (3107 degree) thiab ZrC (3530 degree). Nyob rau hauv cov xwm txheej siab, carbides yuav oxidize, tab sis feem ntau tseem muaj oxidation ntau dua cov hlau melting point ntau dua, thiab kuj siab dua siab -purity graphite thiab carbon. Feem ntau carbides muaj siab hardness thiab zoo hluav taws xob thiab thermal conductivity. Qee cov khoom carbide tau qhia hauv Table 8-6. Cov txheej txheem synthesis yooj yim rau carbides suav nrog: cov tshuaj tiv thaiv ncaj qha ntawm cov hlau nrog cov hmoov carbon; lithium aluminium hydride (kev tshwm sim ntawm hydroxides nrog carbon); thiab cov tshuaj tiv thaiv ntawm cov hlau nrog cov pa roj carbon.

Yuav ua li cas yog Silicon Carbide khoom tsim?

Kev tsim cov khoom siv silicon carbide xav tau cov khoom siv silicon carbide raw khoom. Cov txheej txheem kev lag luam ntawm silicon carbide suav nrog kev sib xyaw quartz xuab zeb (56%), coking thee (35%), sawdust (7%), thiab ntsev (2%) ua ke thiab cua sov qhov sib xyaw kom txog li 2200℃hauv qhov cub hluav taws xob. Cov ntsev tshem tawm cov seem ntawm cov xuab zeb quartz thiab coking thee, thaum cov sawdust tsim cov vents, ua kom yooj yim tso pa tawm. Lub columnar tiv thaiv cua sov lub caij, muaj li ntawm silicon carbide los yog carbon hais, yog muab tso rau hauv nruab nrab ntawm lub cub tawg, nrog rau raw cov ntaub ntawv nyob ze nws. Qhov tshwm sim me me muaju yog crushed, ntxuav nrog acid thiab alkali, thiab ces sib nqus hlau nplaum kom tshem tawm cov hlau seem. Tom qab ziab, cov khoom siv silicon carbide tau txais.