Cov khoom siv raw siv hauv kev tsim cov toner feem ntau suav nrog flake graphite, roj av coke thiab microcrystalline pob zeb number case.Qhov siab dua qhov purity ntawm graphite, tus nqi siv ntau dua.Graphite purification txoj kev tuaj yeem muab faib ua cov txheej txheem ntawm lub cev thiab cov txheej txheem tshuaj.Txoj kev purification ntawm lub cev muaj xws li flotation thiab kub purification, thiab chemical purification txoj kev muaj xws li acid-base method, hydrofluoric acid method thiab chloride roasting method.
Ntawm lawv, cov txheej txheem kub purification tuaj yeem ua rau siv lub siab melting point (3773K) thiab boiling point ntawm graphite kom ua tiav 4N5 thiab siab dua purity, uas muaj evaporation thiab emission ntawm impurities nrog tsawg boiling point, thiaj li mus cuag lub hom phiaj ntawm. purification [6].Lub tshuab tseem ceeb ntawm siab purity toner yog kev tshem tawm cov kab tsis huv.Ua ke nrog cov yam ntxwv ntawm cov tshuaj purification thiab kub purification, ib tug tshwj xeeb segmented composite siab kub thermochemical purification txheej txheem yog saws mus cuag cov purification ntawm siab purity toner cov ntaub ntawv, thiab cov khoom purity yuav ntau tshaj 6N.
Cov khoom siv thiab kev ua haujlwm:
1, khoom purity≥99.9999% (6N);
2, siab purity carbon hmoov stability, siab degree ntawm graphitization, tsawg impurities;
3, granularity thiab hom tuaj yeem kho raws li cov neeg siv khoom.
Cov khoom siv tseem ceeb ntawm cov khoom:
■Synthesis ntawm siab purity SiC hmoov thiab lwm yam khoom theem hluavtaws carbide cov ntaub ntawv
■Loj hlob pob zeb diamond
■Cov khoom siv thermal conductivity tshiab rau cov khoom siv hluav taws xob
■High-end lithium roj teeb cathode khoom
■Precious hlau compounds kuj yog raw cov ntaub ntawv
