Vim li cas peb thiaj xav tau quartz crucibles. Nqe lus piav qhia thiab thaj chaw
Vim li cas peb thiaj xav tau quartz crucibles. Nqe lus piav qhia thiab thaj chaw

Video: Vim li cas peb thiaj xav tau quartz crucibles. Nqe lus piav qhia thiab thaj chaw

Video: Vim li cas peb thiaj xav tau quartz crucibles. Nqe lus piav qhia thiab thaj chaw
Video: kib phav npoob cig plaws ผักบุ้งไฟแดง 2024, Kaum ib hlis
Anonim

Nyob hauv lub arsenal ntawm ib lub chaw kuaj mob muaj ntau yam khoom siv sib txawv siv rau ntau yam kev xav tau. Feem ntau nyob rau hauv tus txheej txheem ntawm kev soj ntsuam ua hauj lwm, yuav tsum tau ntim uas muaj zog tiv thaiv kub, siab thiab caustic tshuaj. Xws li cov tais diav muaj xws li quartz crucibles, cov khoom uas muaj txiaj ntsig zoo hauv kev ua haujlwm analytical thiab ntau yam lag luam.

Nws yog dab tsi thiab siv thaj chaw twg?

Crucible yog lub nkoj tsim los rau cua sov, hlawv, evaporating, ziab, quenching lossis melting txhua yam khoom nyob rau hauv huab cua kub heev.

Txhua hom quartz iav yog sib sau ua ke los ntawm lawv cov yam ntxwv tsis kam mus rau qhov kub thiab txias ntawm ntau lub hauv paus chiv keeb. Qhov tsuas yog tshwj xeeb yog hydrofluoric thiab phosphoric acids, preheated rau 300 ° C.

Lub nkoj no tsis yog siv rau hauv cov txheej txheem ntawm kev sim thiab tshuaj xyuas xwb. Kuj tseem muaj qhov loj-loj versions ntawm crucibles. Lawv yog siv nyob rau hauv chemical, metallurgical thiab lwm yam lag luam.

hnyav metallurgy
hnyav metallurgy

Quartz crucible yog qhov zoo tshaj plaws haum rau kev ua haujlwm nrog cov tshuaj sib txawv ntawm cov qib causticity. Lub nkoj yog tus cwj pwm los ntawm kev ua haujlwm siab heev rau caustic acids. Nws tsis ntshai ntawm qhov kub thiab txias (txog 1250 ° C suav nrog) ua ke nrog kev kub siab. Kev vibration thiab lwm yam kev cuam tshuam, nrog rau qhov txias txias tom qab overheating, yuav tsis ua rau muaj kev puas tsuaj. Tej yam tsis zoo nrog cov alkaline reagents vim siab hygroscopicity, uas ua rau muaj hluav taws xob siab.

Corrosive acids
Corrosive acids

siv qhov twg?

Cov ntawv thov ntawm quartz crucibles yog qhov dav heev. Raws li tau hais ua ntej, lub tank no tau siv dav hauv kev tshawb fawb hauv chav kuaj, thaum ua haujlwm nrog ntau cov kua qaub thiab hauv cov hlau hnyav. Tab sis kev ua haujlwm ntawm crucibles tsis txwv rau qhov no. Yog tias tsis siv cov crucibles, piv txwv li, kev tsim cov khoom siv hluav taws xob semiconductor yog tsis yooj yim sua. Lub thawv yog qhov tseem ceeb txawm tias nyob rau hauv kev kho hniav thiab orthopedics, vim tias kev tsim cov hniav hniav, cov hniav thiab cov txuas hniav yog tsis yooj yim sua yam tsis muaj nws siv.

hniav hniav
hniav hniav

Qhov zoo ntawm quartz tshaj lwm cov ntaub ntawv

Cov khoom no ua ke muab lub tswv yim ntawm qhov txiaj ntsig tseem ceeb ntawm quartz crucible tshaj lwm yam.

  • Ua ntej, quartz iav crucibles tam sim no pheej yig dua los tsim dua lawv cov platinum counterpart.
  • Thib ob, cov khoom siv no tiv taus ntau qhov chaw nruj dua li, piv txwv li, plooj (porcelain), uas tseem siv los tsim cov iav iav, suav nrogcrucibles.
  • Thib peb, kev tsim cov quartz crucibles tsis yog ua haujlwm hnyav li, piv txwv li, platinum lossis porcelain crucibles.

Kev sib xyaw thiab kev tsim khoom ntawm quartz iav

Quartz lossis silicate iav yog tsim los ntawm silica npaj. Cov txheej txheem muaj nyob rau hauv qhov tseeb tias silicon oxide nyob rau hauv cov khoom siv raw yog coj mus rau lub xeev amorphous. Nws yog qhov tshwj xeeb no uas muab quartz iav xws li zoo tiv thaiv acids thiab kub hloov pauv. Ntau qhov kev ntsuam xyuas tau pom tias cov thawv ntim tsis deform lossis tawg txawm tias tom qab nees nkaum qhov rov ua dua ntawm cov thermal hloov pauv.

Amorphous silica
Amorphous silica

Quartz crucibles yog tsim los ntawm kev tau txais ib qho siab concentration slurry ntawm quartz raw khoom. Qhov no yog ua raws li molding ntawm cov thawv nrog kev pab los ntawm blanks, ziab ntawm raw cov ntaub ntawv, firing nyob rau hauv ib tug muffle rauv ntawm ib tug kub ntawm txog 300 ° C. Cov txheej txheem tua hluav taws yuav kav ntev li 3 teev, tom qab ntawd cov txiaj ntsig tau raug impregnated nrog methylphenylspirosiloxane. Cov kauj ruam kawg hauv kev tsim cov tais diav quartz yog daim ntawv thov txheej txheej uas muaj silicon nitride.

Cov khoom tau txais yog kuaj rau kev ruaj ntseg thiab ua raws li GOST 19908-90. Tom qab ntawv pov thawj zaum kawg, cov khoom tau npaj siv.

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