Silica li cas los silica micropowder yog ib qho inorganic, tsis {}} nws cov khoom siv ua los ntawm quartz los ntawm kev sib tsoo, sib tsoo, thiab cov txheej txheem lim dej. Nws yog dav siv nyob rau hauv txheej ci, plastics, roj hmab, ntim ntim, thiab lwm thaj teb. Nws cov cwj pwm tseem ceeb tau cuam tshuam rau nws cov khoom siv lub cev, tshuaj lom neeg ruaj khov, thiab ua cov khoom yoog.
Hais txog cov khoom siv lub cev, zoo tib yam silica micropowder yog tus cwj pwm los ntawm cov kev huv siab thiab cov khaub ncaws me me. Nws silicon dioxide (sitio₂) cov ntsiab lus feem ntau yog ib qho tshwj xeeb 99%, nrog cov ncauj lus tsis sib txawv, ua kom muaj kev ntseeg tau. Lub particle loj faib yog nthuav tawm hauv micron ntau (piv txwv li tuaj yeem hloov kho raws li cov kev xav tau, ua tiav ob qho tib si txhaws thiab walk. Tsis tas li ntawd, Silica Microspowder muaj lub hardness siab (mohs hardness (mohs hardness 7) thiab saib xyuas yuav tsum tau them rau cov hnav thiab kua muag ntawm cov khoom siv thaum lub sijhawm ua.
Tshuaj lom zem ruaj khov yog lwm qhov txiaj ntsig zoo ntawm silica micropowder. Nyob rau hauv chav tsev kub, nws yog insoluble hauv dej, acids (tshwj tsis yog hydrofluoric acid), thiab cov kuab tshuaj organic. Nws muaj kua qaub zoo heev thiab alkali corrosion tsis kam, ua rau nws haum rau cov khoom uas cuam tshuam rau cov chaw hnyav. Silica hmoov kuj muaj cov qauv amorphous lossis crystalline (piv txwv li cov khoom siv hluav taws xob sillici, thiab tswj cov khoom seem ntawm kev siv hluav taws xob thiab cov khaubncaws sab nraud hluav taws xob.
Nyob rau hauv cov nqe lus ntawm cov ntawv thov, tus nqi tseem ceeb ntawm tus qauv Silica hmoov lus nyob rau hauv nws cov haujlwm ua haujlwm muab tub lim cov khoom siv. Nws cov chaw siab tuaj yeem txhim kho cov khoom siv tshuab hluav taws xob (xws li cov khoom siv compressive thiab hnav tsis kam) thaum txo cov tshuab hluav taws xob thiab tus nqi ntawm cov tshuab resin. Piv txwv, ntxiv silica hmoov rau epoxy pem teb txheej tuaj yeem txhim kho cov coj coj tawm tsam; Raws li ib tug muab tub lim rau hauv cov yas, nws tuaj yeem txhim kho kom nruj thiab txo cov shrinkage deformation.
Txawm li cas los xij, tus qauv Silica hmoov tseem muaj kev txwv. Piv txwv li, tsis kho cov hmoov tej zaum yuav cuam tshuam kev faib tawm hauv cov kab ke, uas xav tau kev hloov kho nrog cov lej sib txuas tau zoo. Zuag qhia tag nrho, nws cov khoom siv lub cev muaj zog thiab tshuaj lom neeg thiab kev lag luam efficiency ua nws qhov tsis muaj nqis los ntawm cov khoom lag luam.
