Muaj ntau ntau yam ntawm cov xim muaj ntau yam sib txawv, tsis yog txhua txhua xim tuaj yeem siv tau hauv cov hmoov pleev xim. Vim yog qhov tshwj xeeb ntawm nws tus kheej cov txheej txheem, cov hmoov txheej hmoov yuav tsum them sai sai rau cov ntsiab lus hauv qab no thaum xaiv cov xim muaj hlau.
Xim dispersion zoo dua, qhov zoo tshaj plaws dispersion qhov loj me yog 0.2 ~ 0.9μm, tsis yooj yim rau agglomerate.
Xim xim nkaum zog thiab xim fais fab muaj zog dua.
Lub thermal stability yog qhov zoo dua, thiab qhov kub yuav tsum yog tsawg kawg 160 ℃.
Cov xim yuav tsum muaj qee yam lub teeb thiab huab cua tsis kam, xws li tsis yooj yim kom ploj, tiv thaiv cov hmoov, thiab ua kom lub cev muaj lub cev ntev.
Cov roj nqus ntawm cov xim muaj ntsis, thiab cov ntshav tsis kam tiv thaiv zoo dua.
Ruam xaiv
Ntxiv cov nqi ntawm qhov muab cov hmoov ua kom cov hmoov txheej tuaj yeem nce lub zog thiab lwm yam khoom siv ntawm cov xim txheej, thiab tuaj yeem txo tus nqi, uas yog txoj hauv kev zoo los kho tus nqi ntawm cov hmoov txheej.
Cov tub lim siv cov hmoov txheej yog feem ntau calcium carbonate thiab barium sulfate, thiab zoo li bentonite, talc, quartz hmoov, thiab lwm yam tuaj yeem suav hais tias yog cov ua haujlwm sau, qhov nyiaj tag nrho yog tsawg heev.
Raws li cov txheej txheem xws li cov txheej txheem ntau lawm thiab cov khoom siv raw, calcium carbonate tuaj yeem faib ua ob hom: lub teeb calcium carbonate thiab hnyav calcium carbonate. Ob hom calcium calciumate muaj cov ntawv thov ua hmoov.
Nws kuj tseem muaj ob hom barium sulfate: hom nag lossis daus thiab hom barite. Cov qub yog tsim los ntawm cov tshuaj lom neeg, thiab qhov tom kawg yog tsim los ntawm kev sib tsoo ntuj ntuj.
Cov teeb meem yuav tsum tau sau tseg thaum xaiv cov tub lim yog:
Qhov ntxuav hniav dawb ntawm tus muab tub lim yuav tsum siab, uas tuaj yeem txo cov nqi ntawm titanium dioxide.
Tsawg dua impurities, xav txog qhov tshwj xeeb ntawm cov hmoov txheej txheej txheej, ntau impurities hauv cov muab tub lim yuav cuam tshuam rau qhov kho kom zoo nkauj saum npoo ntawm txheej xim zaj duab xis (muaj ntau ntau qhov cuam tshuam ntawm txheej txheej thiab tsis zoo ntawm qib).
Tsis txhob xaiv cov tshuaj txau nrog cov ntxhib loj heev, vim tias lawv tsis yooj yim rau tawg thiab hnav ntawm cov ntsia hlau.
Tus muab tub lim yuav tsum xoob, tsis caking, thiab cov ntsiab lus dej yuav tsum tsawg.