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.
