Ceramic Fiber Properties thiab Daim Ntawv Thov

Cov ntaub ntawv ceramic muaj qhov zoo ntawm qhov siab melting point, siab hardness, siab hnav tsis kam, oxidation tsis kam, thiab lwm yam, thiab yog hu ua peb cov khoom tseem ceeb niaj hnub no nrog rau cov ntaub ntawv hlau thiab cov ntaub ntawv polymer. Cov ntaub ntawv ceramic tau muab faib ua cov qauv ceramics thiab cov khoom siv ceramics raws li qhov xwm txheej thiab daim ntawv thov. Structure ceramics: Cov qauv ceramics muaj qhov zoo ntawm qhov kub thiab txias, kev ruaj ntseg zoo, tsis yooj yim rau corrode, siab zog, siab hardness, thiab zoo thermal conductivity. Raws li lawv cov khoom, cov txheej txheem ceramics tau muab faib ua peb pawg: oxide ceramics, non-oxide ceramics, ceramics matrix composites; Functional ceramics: Functional ceramics yog cov khoom siv uas siv nws tsis yog -cov khoom siv tshuab. Kev ua haujlwm ceramics muaj ntau daim ntawv thov hauv biotechnology, aerospace, kev txhim kho lub zog thiab lwm yam haujlwm.

Hom ntawm ceramics fibers

Ceramic fiber yog ib yam khoom siv refractory nrog lub teeb yuag thiab fibrous tsos. Nws qhov ntev fiber ntau yog 100-250mm thiab txoj kab uas hla fiber ntau yog 2-5m. Ceramic fiber ntau cov khoom muaj qhov zoo ntawm lub teeb yuag, kub tsis kam, me me tshav kub muaj peev xwm, zoo thermal rwb thaiv tsev thiab kub thermal rwb thaiv tsev zog, thiab lwm yam., yog li ntawd lawv yog dav siv nyob rau hauv aviation, petrochemical thiab lwm yam kev lag luam. Muaj ntau hom ceramic fibers, uas tuaj yeem muab faib ua crystalline fibers thiab iav fibers raws li lawv cov microstructure, ntawm cov uas SiO2 thiab Al2O3 yog cov neeg sawv cev ntawm iav fibers; ceramic fibers tuaj yeem muab faib ua oxide fibers thiab tsis yog - oxide fibers raws li lawv cov tshuaj muaj pes tsawg leeg. Ntawm lawv, SiC thiab Si3N4 yog cov neeg sawv cev ntawm cov tsis yog - oxide fibers; ceramic fibers tuaj yeem muab faib ua peb pawg raws li kev siv kub: qis-qib ceramic fibers (800-1100 degree), nruab nrab qib ceramic fibers (1100-1300 degree), qib siab ceramic fibers (1300- 1300 degree) 1500 degree).

Ceramic fiber ntau siv

Cov khoom siv thermal rwb thaiv tsev: ceramic fiber muaj qhov zoo ntawm qhov kub thiab txias, uas tuaj yeem tiv taus qhov kub ntawm 1500 ° C; ceramic fiber kuj muaj cov thermal rwb thaiv tsev zoo, uas yog txiav txim siab los ntawm cov qauv sib xyaw ntawm ceramic fiber (ie, khoom fiber ntau thiab cua). Yog li ntawd, ceramics fibers tuaj yeem daws qhov teeb meem tsis zoo ntawm cov khoom siv refractory. Lub thermal rwb thaiv tsev ntawm ceramic fibers ua rau cov khoom siv fiber ntau siv dav hauv cov phab ntsa hauv tsev thiab cov khoom siv hauv tsev.

Cov khoom siv lim dej kub kub: ceramic fiber muaj qhov loj ntawm thaj chaw tshwj xeeb, thiab cov khoom lim npaj los ntawm nws muaj qhov pom zoo purity. Nyob rau tib lub sijhawm, ceramic fiber ntau qhia tau hais tias kev ua tau zoo tshaj plaws nyob rau hauv cov nqe lus ntawm thermal stability, tshuaj stability thiab thermal shock kuj. Yog li ntawd, ceramic fibers yog dav siv nyob rau hauv ib puag ncig teb, xws li huab cua purification, dej phwj kho mob, thiab flue gas filtration.

Cov khoom siv suab nrov thiab suab rwb thaiv tsev: cov khoom siv fiber ntau ceramic muaj lub suab zoo thiab lub suab rwb thaiv tsev, feem ntau vim tias thaum lub suab nthwv dej xa mus rau sab hauv ntawm cov khoom, lub suab nthwv dej thiab huab cua uas muaj nyob rau hauv fiber ntau pores yuav muaj viscous nyhuv. , thiab lub suab nthwv dej kuj yuav tsim kev sib txhuam nrog cov fiber ntau. , yog li ib feem ntawm lub suab ploj yog hloov mus rau hauv lub zog cua sov. Tsis tas li ntawd, cov huab cua nyob rau hauv fiber ntau pores tsim tshav kub conduction thaum compressed, thiab lub tshav kub conduction kuj ua rau lub suab tsis muaj zog, yog li absorbing lub suab tsis tuaj. Yog li ntawd, cov khoom siv fiber ntau ceramic muaj lub suab zoo thiab lub suab rwb thaiv tsev, uas ua rau nws siv dav hauv kev tsim kho, kev thauj mus los thiab lwm yam haujlwm.

Catalyst carrier khoom: ceramic fiber muaj qhov zoo ntawm qhov loj ntawm qhov chaw, siab porosity, zoo catalytic nyhuv, thiab lwm yam. Thaum lub ceramic fiber loaded nrog catalyst yog siv nyob rau hauv cov tshuaj diffusion tshuaj tiv thaiv, vim nws me me diffusion kuj, ib tug zoo catalytic nyhuv. yog tau. Yog li ntawd, ceramic fiber Raws li catalyst, nws muaj peev xwm siv tau zoo hauv thaj chaw ntawm catalysis.

Kev siv zog thiab cov ntaub ntawv toughening: Qhov tsis zoo ntawm cov khoom tsis zoo ntawm cov khoom siv ceramic yog qhov paub zoo, yog li cov fibers ceramics yog txoj hauv kev zoo tshaj plaws los ua cov khoom siv ceramic. Cov feem ntau siv ceramic fibers yog: Al2O3 fibers ntev, SiC ntev fibers, thiab lwm yam. Tib lub sij hawm, ceramic fibers kuj yuav siv tau nyob rau hauv lub toughening ntawm cov ntaub ntawv hlau.

Cov ntaub ntawv ua haujlwm tshiab: Ceramic fibers tau siv dav hauv cov khoom siv siab siab tshiab -kub superconducting cov ntaub ntawv, cov khoom siv tshiab, xws li deb-infrared fibers, conductive fibers, thiab lwm yam vim lawv muaj ntau yam zoo.