Cov yam ntxwv ntawm Dawb Fused Alumina rau Refractory Coatings
Dawb fused alumina rau cov txheej txheem refractory muaj qhov chaw yaj siab, ruaj khov thermal zoo heev, tiv taus tshuaj lom neeg corrosion zoo, tawv thiab hnav tsis kam, ua haujlwm tau zoo, thiab cov txheej txheem sib xws, ntom ntom. Cov yam ntxwv tseem ceeb tau piav qhia hauv qab no:
I. Lub Nruab Nrab Melting Siab thiab Thermal Stability
Alumina dawb fused muaj lub melting point siab, tswj tau lub cev thiab tshuaj lom neeg ruaj khov hauv qab qhov kub siab yam tsis yaj lossis deformation. Qhov no ua rau nws yog ib qho khoom siv zoo tshaj plaws rau kev txhim kho kev ua haujlwm refractory ntawm cov coatings, xyuas kom meej tias lawv tiv taus lub sijhawm ntev rau qhov kub siab hauv cov cub tawg, smelting furnaces, thiab cov khoom siv zoo sib xws yam tsis muaj kev puas tsuaj.
II. Kev Tiv Thaiv Kev Tshuaj Lom Zem
Alumina dawb fused qhia tau tias muaj kev tiv thaiv zoo rau cov tshuaj corrosive xws li cov kua qaub thiab alkalis, tseem tsis cuam tshuam los ntawm feem ntau cov tshuaj lom neeg. Hauv cov chaw corrosive hauv kev lag luam xws li kev ua tshuaj lom neeg thiab metallurgy,cov txheej txheem refractorymuaj cov alumina dawb fused tswj kev ruaj khov mus sij hawm ntev, ua kom lub neej khoom siv ntev dua.
III. Kev Nyuaj Siab thiab Kev Hnav Tsis Taus
Nrog rau qhov nyuaj ntawm Mohs thib ob tsuas yog pob zeb diamond thiab silicon carbide, alumina dawb fused muaj kev tiv thaiv kev hnav zoo heev. Nws tiv taus kev cuam tshuam thiab kev puas tsuaj los ntawm cov kua dej thiab cov khoom me me uas muaj zog heev thaum tswj qhov du thiab tiaj tus dhau sijhawm.
IV. Kev Ua Haujlwm Zoo Kawg Nkaus
Dawb fused aluminasiv tau los ntawm kev txau, txhuam, lossis lwm yam zoo sib xws. Thaum siv, nws faib sib npaug thiab sib txuas nrog lub substrate kom ua ib txheej refractory tuab. Nws qhov huv siab thiab cov khoom tsis muaj kuab paug tsawg txo qhov nyuaj ntawm kev siv, txhim kho kev ua haujlwm, xyuas kom meej tias txheej sib npaug thiab ceev, thiab txo qhov kev pheej hmoo ntawm kev tawg lossis tev.
V. Txheej Txheem Sib Xws thiab Nto
Cov txheej txheej refractory uas muaj alumina dawb fused tsim cov txheej tuab sib npaug thaum lub sijhawm siv, ua kom txo qhov porosity thaum ua kom cov khoom tuab thiab lub zog ntau ntxiv. Qhov no pab txhawb rau kev ua tau zoo ntawm cov txheej txheej tag nrho, suav nrog kev refractoriness, kev tiv thaiv kev cuam tshuam, thiab kev tiv thaiv kev sib txhuam.
VI. Kev Tiv Thaiv Oxidation thiab Kev Tiv Thaiv Thermal Shock
Alumina dawb fused muaj zog tiv taus oxidation thiab tsawg kawg nkaus degradation tshuaj thaum siv ntev, txo cov txheej spalling thiab laus hauv oxidizing atmospheres. Tsis tas li ntawd, nws txhim kho thermal shock tsis kam thiab slag erosion tsis kam los ntawm kev sib xyaw ua ke nrog ntau yam oxides lossis non-oxides.
VII. Kev siv tau ntau yam thiab kev siv tau dav dav
Cov txheej txheem refractory uas muaj alumina dawb fused tsis yog tsuas yog tsim rau kev tiv thaiv cov khoom siv kub siab xwb tab sis kuj tuaj yeem ua kom tau raws li ntau yam kev xav tau los ntawm kev kho qhov loj me ntawm cov khoom me me.