??????? Trioxide (wo3)

????????

?? ??????? ???????? ????? ??????? ??????? ????? ???? -18. ???? Woulfe ??? ?????? ????? ?????? ??? ????????, wolframite ????? ????? ????. ??????? ??? ???? ????? ??????, ?????? ?? ?????? ?? "W" ???? ?????? ???. ????? ????? ??? ?????? ??? ???????, ??? ?? ?? ?????? ?? scheelite ????????.
?1841, ????? ??? ????? Oxland ??? ??????? ???????? ????? trioxide ??????? ?tungstate ????. ??? ????? ?????? ?? ?????? ???? ???? ???, ???? ???? ?????? ?? ?????? ??????? ???????.

???? ?????? Trioxide ???????

?????? ???????, ??????? (IV) ?????? (WO2), ??????? ?????? (VI) (WO3), trioxide ???????, ??????? trioxide (VI), ???????? tungstic, 1314-35-8 CAS # (WO3), ?????? ?? ??? ditungsten, undecaoxide tetratungsten, scheelite ?????? ???????, ?????? ??????? (W2O5), wolframite, ?????? ferberitetungsten (W4O11)

????

?????? ??????? (VI), ????? ?? trioxide ??????? ?? ???????? tungstic, WO3, ??? ?????? ????? ?????? ???? ???????? ???? ????. ?? ????? ??????? ????????? ?? ??????? ???????? ???. ??????? ????? ??????? ?? ??????? ????? WO3. ????? ????? ??? ???? ?? ???? ?????? trioxide ??????? ????? ??????.

2WO3 + 3C + heat → 2W + 3CO2
WO3 + 3H2 + heat → W + 3H2O

?????? ??????? (VI) ?????? ????? ???? ????? ?? ???? ????, ?????? ???????: tungstite WO3 ? H2O, 2H2O meymacite WO3 ? ?hydrotungstite (?? ??? ??? meymacite, ?????? ?? ??? ??? ????? H2WO4). ??????? ??? ?? ?????? ??????? ??????? ?????? ?????? ????.
Trioxide ??????? ???? ????? ????? ????? ?????. CaWO4, ?? scheelite, ???? ????? ?? HCl ????? ????? tungstic, ??????? ?WO3 ???? ?????????? ??????.

CaWO4 + 2HCl → CaCl2 + H2WO4
H2WO4 + heat → H2O + WO3

??? ????? ???? ????? WO3 ??? ?? ??? ????? ?? paratungstate ??????? (APT) ????? ?????:

(NH4)10[H2W12O42]?4H2O → 12 WO3 + 10NH3 + 11H2O

????

????? ?????? ?? trioxide ??????? ??? ???? ?????????. ?? tetragonal ?????????? ??? 740 ° C, ?????????? 330-740 ° C, monoclinic 17-330 ????? ??????, ?triclinic ?-50 17 ° C.????? ????? ????? ?? WO3 ??? monoclinic ?? p21 ?????? ????? / n.

???????

Trioxide ??????? ???? ?????? ???? ???? ???????. ??? ???? ????? ?????? ??????? ?????? ????????? ?phosphors ??? ?????, ????? ?????? ?? ???????? ??. ??? ???? ????? ????? ???, WO3 ???? ?? ??????? ??????? ??????.
????? ????????, trioxide ??????? ??? ????? ?????? ?? ?????? electrochromic, ?? ?????? ?????. ?????? ??? ?? ??? ?????? ?????? ?? ????? ?????? ????? ??? ?? ??? ?????. ?? ????? ?????? ????? ?? ??????? ????, ????? ?? ???? ???? ?? ??? ???? ????. ??? ????? ??? ???????? ??? ?????? ??? ???? ???? ??????, ?????? ????? ?????? ?? ??????? ??? ??? ????? ????? ??? ????? ???? 2008-2009.
2010 - AIST ????? ????? ??????? ?? 19% ?????? ???? photocatalytic ?? photocatalys ?????? ??????? ????? ?????.

Grade	WO3 (%,min.)	Impurities (%,max. )
		As	Fe	Ca	(K+Na)	Co	Mg
Special	88.8	0.001	0.001	0.001	0.002	0.0005	0.0005
1st	88.5	0.001	0.001	0.001	0.002	0.001	0.0005
Mn	Ni	Si	Ti	Mo	Cu	V	P
0.0005	0.0005	0.002	0.0005	0.002	0.0005	0.0005	0.0007
--	0.0007	0.002	0.001	0.005	0.0007	0.001	0.0007
S	Cr	Al	Sb	Pb	Sn	Bi	Cd
0.0007	0.0003	0.0003	0.0002	0.0001	0.0001	0.0001	0.0001
0.0007	--	0.0005	0.0005	0.0001	0.0001	0.0001	0.0001

 

Grade	Igniting loss(%)	Apparent density(g/cm3)	Screen size  (mesh)
Special	11.2	2~2.4	-80,100%
1st	11.5	2~2.4	-

?????: ????? ???? ??????? ???? ????? ?????? ?? 100 ?? 200 ???? ??? ?? ???.
????: ???? ???? ??? ?????? ???????? ???????.

?? ?? ?? ????? ?trioxide ???????, ?? ???? ????? ????? ????"? ?????: sales@chinatungsten.com ?? ??????: +86 592 5129696.

?????? ??????>>

1.Tungsten Powder

2.E-catalog of Tungsten Powder

3.Tungsten Trioxide

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