Qhov ntau ntom ntom ntawm refractory ceramic fiber yog hais txog qhov sib piv ntawm qhov hnyav ntawm ceramic fiber rau tag nrho cov khoom. Qhov loj me ntawm qhov ntom ntom yog qhov ntsuas kom txiav txim siab seb cov cua sov puas tsim nyog. Nws yog ib qho tseem ceeb uas cuam tshuam rau thermal conductivity.
A. Cov thermal conductivity ntawm cov khoom ceramic-fiber txo qis nrog qhov nce ntawm qhov ntom ntom, tab sis qhov ntau ntawm cov khoom yuav maj mam txo, yog li ntawd thaum qhov ntom ntom ntau dhau ib qho, cov thermal conductivity tsis txo qis, tab sis muaj kev nyiam ua kom nce.
B. Nws muaj tsawg kawg thermal conductivity thiab sib raug ntim tsawg kawg ntawm cov kub, thiab lub ntim ntom ntom nti nrog qhov ntsuas kub.
Nws yog ib qho tseem ceeb heev kom nkag siab thiab siv cov cai saum toj no rau kev siv cov ceramic fibers. Adiabatic kev ua tau zoo ntawm ceramic fibers feem ntau yog raws li cov nyhuv adiabatic ntawm cov huab cua kaw hauv qhov pores ntawm cov khoom. Thaum qhov kev faib ua feem ntawm cov khoom fibers yog qhov tseeb, qhov loj dua qhov porosity yog, qhov me me qhov ntim ceev yog.
Thaum qhov ntom ntom tsawg dua 96Kg / m³, vim qhov kev txhim kho oscillating convection thiab hluav taws xob hloov hluav taws xob ntawm cov roj hauv cov qauv sib xyaw, cov thermal conductivity txo qis nrog qhov ntom ntom, uas qhia txog kev nce ntxiv ntawm kev ua haujlwm exponential.
When the bulk density is >96KG / ML, raws li cov tuab ntom ntom ntom ntom nti, cov cua ntws tawm hauv cov qhov hluav taws xob kub hnyiab tau (cov cua sov hloov pauv ntawm cov qhov cub hluav taws xob ntawm cov qhov cua sov, yog li txo cov thermal conductivity.
Thaum qhov ceev ceev nce mus rau qee yam ntawm 240 ~ 320Kg / m³, qhov sib cuag ntawm cov khoom fiber ntau nce, yog li cov fiber ntau nws tus kheej tsim ib qho cim, thiab qhov kub hloov pauv hnyav nce los ntawm tus choj. Qhov thib ob, qhov chaw sib cuag ntawm cov khoom fiber ntau nce, thiab cov pores cuam tshuam rau cov cua sov hloov. Cov nyhuv damping tsis muaj zog, yog li ntawd cov thermal conductivity tsis txo qis thiab muaj lub siab xav nce. Yog li ntawd, cov khoom siv fiber ntau ntxeem tau muaj qhov pom zoo ntim ntom nrog qhov tsawg tshaj plaws thermal conductivity. Rau txawv teb chaws txheej ceramic fiber phab ntsa hauv ob sab phlu, qhov ntim ceev ntawm ceramic fibers ntawm qhov kub kub yog teev raws li 130 ~ 160Kg / m³, thiab qhov ntim ntawm ceramic fibers ntawm qhov kub ntawm cov vuas sib xyaw rauv hauv ob sab phlu Qhov ceev yog teev li 200 ~ 240Kg / m³.
Tom qab qhov kub ntawm phab ntsa ntawm lub cub tawg, qhov ntim ntom ntom ntawm cov khoom fiber ntau ntawm txhua theem txo qis, vim tias thaum kub kub, thermal conductivity ntawm ceramic fiber txo qis dua nrog qhov nce ntawm qhov ntom ntom dua li qhov kub thiab txias (raws li qhia hauv daim duab). Cov txheej txheem fiber ntau nrog cov khaubncaws sab nraud povtseg hauv cov thickness kev taw qhia sib tw raws li qhov ntom ntom tuaj yeem ua kom cov thermal tsis sib xws nyob rau hauv cov thickness kev taw qhia ntawm lub qhov cub hauv ob sab phlu. Nyob rau hauv tib lub thermal tsis kam, nws tuaj yeem txuag tau fiber ntau noj thiab txo cov nqi siv hluav taws xob.