Cas 7782-49-2 siab purity 99.9% -99.999% Selenium Se hmoov los yog granules nqe

Cas 7782-49-2 siab purity 99.9% -99.999% Selenium Se hmoov los yog granules nqe Featured duab
  • Cas 7782-49-2 siab purity 99.9% -99.999% Selenium Se hmoov los yog granules nqe
  • Cas 7782-49-2 siab purity 99.9% -99.999% Selenium Se hmoov los yog granules nqe
  • Cas 7782-49-2 siab purity 99.9% -99.999% Selenium Se hmoov los yog granules nqe

Lus piav qhia luv luv:

Khoom npe: Selenium Se hmoov

Formula: Se

Purity: 99.9% - 99.999%

CAS Nr .: 7782-49-2

Qhov tsos: hmoov dub

Particle loj: 200 mesh


Product Detail

Khoom cim npe

Product Description

Amorphous liab hmoov, ua dub ntawm sawv thiab crystalline ntawm cua sov; Cov ntawv vitreous thiab colloidal tuaj yeem npaj tau.

Amorphous daim ntawv softens ntawm 40 ° C thiab melts ntawm 217 ° C. Nws tsis tshua muaj tshwm sim nyob rau hauv nws lub xeev elemental nyob rau hauv cov xwm, los yog raws li ntshiab ore compounds.

Specification

Cim:
Se
CAS
7782-49-2 ib
Atomic Number:
34
Atomic Nyhav:
78.96 ib
Ceev:
4.79g/mc ib
Melting Point:
217oC ua
Boiling Point:
684.9c ua
Thermal conductivity:
0.00519 W/cm/K @ 298.2 K
Hluav taws xob Resistivity:
106 microhm-cm @ 0 oC
Electronegativity:
2.4 Pauling
Thaum tshav kub kub tshwj xeeb:
0.767 Cal/g/K @ 25 oC
Thaum tshav kub kub ntawm Vaporization:
3.34 K-cal/gm atom ntawm 684.9 oC
Thaum tshav kub kub Fusion:
1.22 cal/gm

 

Daim ntawv thov

1 Kev tsim khoom: selenium (I) chlorid, Selenium dichloride, Selenides, mercury selenide.

2 Science high technology kev lag luam: txhuas selenide, zinc selenide, tooj liab indium gallium diselenide.

3 Hluav taws xob: semiconductors, electropositive hlau, Tetraselenium tetranitride.

4 Chemistry: Selenols, selenium isotope, Yas, duab raug.

5 Kev lag luam daim ntawv thov: iav ua, selenium nruas, electrostatic duab, kho qhov muag ntsuas.

Peb Qhov Zoo

Tsis tshua muaj-lub ntiaj teb-scandium-oxide-nrog-zoo-nqi-2

Kev pabcuam peb tuaj yeem muab tau

1) Daim ntawv cog lus raug cai tuaj yeem kos npe

2) Daim ntawv cog lus tsis pub lwm tus paub tuaj yeem kos npe

3) Xya hnub rov qab lav

Tseem ceeb tshaj: peb tuaj yeem muab tsis tau tsuas yog cov khoom lag luam, tab sis kev pabcuam kev daws teeb meem!

FAQ

Puas yog koj tsim khoom lossis lag luam?

Peb yog cov chaw tsim khoom, peb lub Hoobkas nyob hauv Shandong, tab sis peb kuj tuaj yeem muab kev pabcuam nres ib qho rau koj!

Cov nqe lus them nqi

T / T (tex hloov pauv), Western Union, MoneyGram, BTC (bitcoin), thiab lwm yam.

Lub sijhawm ua haujlwm

≤25kg: hauv peb hnub ua haujlwm tom qab tau txais cov nyiaj them poob haujlwm. 25kg: ib as

Qauv

Muaj, peb tuaj yeem muab cov qauv dawb me me rau kev soj ntsuam zoo!

Pob

1kg ib lub hnab fpr kuaj, 25kg lossis 50kg ib nruas, lossis raws li koj xav tau.

Cia

Khaws lub thawv kaw kom nruj rau hauv qhov chaw qhuav, txias thiab zoo-ventilated.

  • Yav dhau los:
  • Tom ntej:

    • QHOV CHAW UA HAUJ LWM