Cov khoom siv tiv thaiv kub kub
Cov khoom siv tiv thaiv kub kub muaj xws li cov ntaub ntawv refractory thiab cov khoom siv tiv thaiv tshav kub, thiab muaj cov inorganic tebchaw thiab cov ntawv siab polymer cov ntaub ntawv. Cov khoom tso refractory feem ntau hais txog cov khoom siv inorganic uas tuaj yeem tiv taus qhov kub siab tshaj 1580 ° C. Lawv yog cov tsim chav tsev cub, chav sib txuas thiab lwm yam khoom siv hauv tsev uas xav tau siab ua haujlwm kub. Feem ntau ua los ntawm quartz xuab zeb, av nplaum, magnesite, dolomite, thiab lwm yam, qhov ntsuas kub yog -80-1800 ° C, qhov ntsuas cua sov yog 0.03W / mK, uas tuaj yeem tiv thaiv cov hluav taws xob kub thiab kev ua haujlwm ntawm cov khoom kub thiab qhov kub thiab txias khoom. Tshav kub, rau cov khoom siv siab kub muaj peev xwm tswj tau 70% ntawm cov cua kub yam tsis poob. Tsis tas li ntawd, qhov kub tsis kam tiv thaiv thermal rwb thaiv tsev txheej txheej kuj yog qhov txawv ntawm rwb thaiv tsev, lub teeb nyhav, kev tsim kho yooj yim thiab kev pab lub neej ntev. Nws kuj tseem siv tau ua cov khoom siv hauv kev ua kom kub thiab acid thiab alkali tiv taus kua nplaum, thiab cov khoom ntog txuas khov kho. Xws li cov roj refractory MAAs, cib cib, thiab lwm yam Hauv kev nkag siab, cov khoom siv ua kom zoo thiab cov khoom siv tiv thaiv kub txhais tau tias cov tebchaw no muaj lub siab tawv, zoo brittleness, zoo tshuaj corrosion tsis kam, thiab lub siab yaj ntawm 1500 lossis ntau dua. Feem ntau muab faib ua cov hlau thiab cov hlau tsis sib xyaw thiab cov hlau sib txuas. Cov qub xws li tungsten, molybdenum, niobium, tantalum, vanadium, chromium, titanium, zirconium thiab lwm yam khoom siv refractory thiab tsis tshua muaj lub ntiaj teb hlau boride, carbide, nitride, silicide, phosphide thiab sulfide; cov tom kawg xws li boron carbide, Silicon carbide, boron nitride, silicon nitride, boron phosphide, silicon phosphide, thiab lwm yam. Cov tom kawg muaj cov ntawv thov tseem ceeb heev thiab tuaj yeem siv ua cov khoom siv hluav taws xob kub (xws li abrasives, pwm, tsis muaj dab tsi, sov siab), cov khoom siv tiv thaiv tshav kub (xws li foob pob hluav taws qauv, khoom siv hluav taws xob nuclear, hluav taws xob cua kub), cov khoom siv hluav taws xob ( Xws li lub ntsuas cua sov, cov roj hluav taws xob tsis zoo, tab sis kuj siv los ua cov khoom siv tshuaj tiv thaiv thiab cov khoom tawv. Cov tshuaj tiv thaiv thaum tshav kub kub polymer tuaj yeem siv cov khoom siv ua cov khoom kub tiv thaiv insulating, cov khoom siv tiv thaiv kub fiber ntau, qhov kub kub tiv thaiv kev tiv thaiv, kub kub ua kom zoo cov nplaum, thiab cov zoo li. Raws li lub sijhawm ntawm kev kub siab ua haujlwm, nws muab faib rau hauv cov khoom kub tiv taus khoom kub thiab ntev lub sij hawm kub kub cov khoom tiv thaiv. Yav dhau los tuaj yeem tiv taus li ob peb feeb txog ob peb feeb ntawm 1000 txog 10000 ° C. Cov khoom siv ablative tseem yog cov khoom siv tiv thaiv kub. Piv txwv li, ntawm 300 txog 600 ° C, nws tuaj yeem tswj nws lub cev muaj zog, qhov tshuaj tiv thaiv tshuaj thiab qhov zoo li hauv huab cua.
