2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Lawv tiv taus cov tshuaj yaig uas tshwm sim hauv lwm cov ntaub ntawv raug acidic lossis caustic ib puag ncig. Ceramics feem ntau tuaj yeem tiv taus qhov kub thiab txias, xws li1, 000 ° C txog 1, 600 ° C (1, 800 ° F txog 3, 000 ° F).
Dab tsi ua rau ceramic muaj zog?
Ob daim ntawv cog lus tshuaj feem ntau rau cov khoom siv ceramic yog covalent thiab ionic. Kev sib txuas ntawm atoms ua ke muaj zog ntau dua hauv covalent thiab ionic bonding dua li hauv cov hlau. Qhov no yog vim li cas ceramics feem ntau muaj cov khoom nram qab no: siab hardness, siab compressive zog, thiab tshuaj inertness.
Puas yog ceramics muaj zog hauv nro?
Ceramics muaj compressive zog txog kaum npaug siab dua lawv lub zog tensile. Lub zog tensile ntawm ceramics thiab iav yog qhov tsawg vim tias qhov tsis zoo uas twb muaj lawm (sab hauv lossis nto tawg) ua raws li kev ntxhov siab concentrators.
Koj ua li cas txiav txim siab lub zog ntawm ceramics?
Flexural Strength yog xam los ntawm tus qauv:
- σ=3LF/(2bd²) hauv 3-point test of rectangular specimen.
- σ=3Fa/(bd²) hauv 4-point test of rectangular specimen.
- σ=16Fa/(πD³)=2Fa/(πr³) hauv 4-point test of round specimen.
- L - qauv ntev;
- F - tag nrho cov quab yuam siv rau cov qauv los ntawm ob lub chaw thau khoom;
- b – qauv dav;
Vim li cas ceramics nyuaj?
Ceramics nyuaj heev vim txoj kev lawv tsim. Lawv yog tsim los ntawm cov txheej txheem cua sov ntawm qhov kub thiab txias thiab ceev ceev kom txias. Lub quenching sai ua rau lub sijhawm tsis txaus rau kev tsim cov ntawv cog lus uas ua rau lawv nyuaj.
Pom zoo:
Vim li cas lub zog muaj peev xwm tsis zoo thaum lub zog txaus nyiam?
Qhov no yog tus nqi tsis zoo rau ob qho laj thawj; lub zog ua yeeb yam ntawm lawv yog qhov txaus nyiam, thiab xoom ntawm lub zog muaj peev xwm yog nyob ntawm kev sib cais tsis kawg. Qhov no yog qhov tshwm sim tsis zoo yog tias lub zog ntawm ob tus nqi txaus nyiam(lawv tawm tsam) thiab qhov zoo yog tias nws ntxub (cov nqi zoo sib xws).
Hauv kev ntsuas qhov muaj zog thiab qhov tsis muaj zog?
Kev ntsuas kev ua tau zoo thiab qhov tsis muaj zog Pab pawg. Ua haujlwm zoo nrog cov neeg siv khoom, cov thawj coj, cov neeg ua haujlwm, thiab lwm tus yog qhov kev txawj ntse. … Adaptability. Koj cov neeg ua haujlwm yuav tsum muaj peev xwm ua tiav lawv txoj haujlwm hauv cov xwm txheej hloov sai.
Thaum twg lub lattice zog muaj zog tshaj?
Lub zog lattice ntawm ionic compounds yog qhov loj. Lub zog lattice ntawm NaCl, piv txwv li, yog 787.3 kJ / mol, uas tsuas yog me ntsis tsawg dua lub zog muab tawm thaum cov pa roj carbon monoxide hlawv. Kev sib cog lus ntawm ions ntawm tus nqi sib txawv yog qhov muaj zog tshaj thaum cov ions me me.
Vim li cas qhov tseem ceeb ntawm qhov muaj zog thiab qhov tsis muaj zog yog qhov tseem ceeb?
Nws yog ib qho tseem ceeb rau qhov tseem ceeb ntawm qhov ua tau zoo thiab qhov tsis muaj zog vim qhov no pab lub tuam txhab txiav txim siab txog thaj chaw uas lawv yuav tsum tau txhim kho ntxiv rau thaj chaw uas lawv ua tau zoo hauv. Vim li cas lub zog thiab qhov tsis muaj zog tseem ceeb?
Thaum lub zog dhau los ua qhov tsis muaj zog?
Ib txoj hauv kev uas lub zog dhau los ua qhov tsis muaj zog yog thaum tus thawj coj siv lawv lub peev xwm rov ua haujlwm, tsis yog lub hauv paus ntawm kev muaj tswv yim los daws qhov teeb meem. Yuav ua li cas koj lub zog tuaj yeem dhau los ua qhov tsis muaj zog?
