Dab tsi yog yam cuam tshuam rau kev hnav tsis kam ntawm refractory cib?

Qhov hnav tsis kam ntawm refractory bricks nyob ntawm seb muaj pes tsawg leeg thiab cov qauv ntawm cov cib refractory. Thaum muaj pes tsawg leeg ntawm cov refractory cib yog ib tug ntom polycrystal muaj li ntawm ib tug siv lead ua, qhov hnav tsis kam yog nyob ntawm hardness ntawm cov pob zeb hauv av crystals uas tsim cov khoom. High hardness, siab hnav tsis kam ntawm cov khoom. Thaum cov pob zeb hauv av tsis yog-isotropic, cov khoom siv lead ua hmoov zoo thiab cov khoom hnav tsis kam yog siab. Thaum cov khoom tsim los ntawm ntau theem, nws qhov hnav tsis kam yog ncaj qha cuam tshuam nrog qhov ntom ntom lossis qhov porosity ntawm cov khoom, thiab tseem cuam tshuam rau kev sib txuas ntawm cov khoom sib txuas. Yog li ntawd, rau ib hom refractory cib nyob rau hauv chav tsev kub, nws hnav tsis kam yog proportional rau nws compressive zog.

Tsis tas li ntawd, qhov hnav tsis kam ntawm cov cib refractory muaj feem xyuam rau qhov kub thiab txias thaum siv. Qee cov cib refractory, xws li siab alumina cib, feem ntau suav hais tias yog nyob rau ntawm qhov kub thiab txias (xws li nyob rau hauv qhov elasticity ntawm 700 ~ 900 ℃), qhov kub thiab txias dua. Qhov qis dua qhov tsis kam, nws tuaj yeem txiav txim siab tias thaum kub nce, raws li elastic modulus ntawm refractory cib nce, hnav tsis kam txo.