|
|
Build Your Online Product Catalogs?
| Product Name: |
(La 、Ce 、Tb)xOy
|
| Supply Ability: |
|
| Related proudcts |
|
| Specifications |
Rare Earth compounds |
| Price Term: |
|
| Port of loading: |
|
| Minimum Order |
|
| Unit Price: |
|
|
Lanthanum, atomic no.: 57, symbol as La, weight at 138.91, is the first element in the rare earth or lanthanide series. It is the model for all the other trivalent rare earths. After cerium, it is the second most abundant of the rare earths.
Lanthanum-rich lanthanide compounds have been used extensively for cracking reactions in FCC catalysts, especially to manufacture high-octane gasoline from heavy crude oil.
Lanthanum-Rich Rare Earth metals play the important roles in hydrogen storage bettaries.
It is utilized in green phosphors based on the aluminate (La0.4Ce0.45Tb0.15)PO4.
Lanthanide zirconates are used for their catalytic and conductivity properties and lanthanum stabilized zirconia has useful electronic and mechanical properties.
It is utilized in laser crystals based on the yttrium-lanthanum-fluoride (YLF) composition.
Cerium, atomic no.: 57, symbol as Ce, weight at 140.12, is the most abundant of the rare earths. It is characterized chemically by having two valence states, the +3 cerous and +4 ceric states. The ceric state is the only non-trivalent rare earth ion stable in aqueous solutions. It is, therefore, strongly acidic and a strong oxidizer. The cerous state closely resembles the other trivalentrare earths.
The numerous commercial applications for cerium include glass and glass polishing, phosphors, ceramics, catalysts and metallurgy:
In glass industry, it is considered to be the most efficient glass polishing agent for precision optical polishing. It is also used to decolorize glass by keeping iron in its ferrous state. The ability of cerium-doped glass to block out ultra violet light is utilized in the manufacturing of medical glassware and aero***ce windows. It is also used to prevent polymers from darkening in sunlight and to suppress discoloration of television glass. It is applied to optical components to improve performance.
In phosphors, the role of cerium is not as the emitting atom, but as a "sensitizer."
Cerium is also used in a variety of ceramics, including dental compos |
| Company: |
China Rare Earth Holdings Co.,Ltd
|
| Contact: |
Mr. guo zhen |
| Address: |
Rm.G.H.8/F Zaofeng Universe Building,1800 Zhongshan Road W |
| Postcode: |
200233 |
| Tel: |
021-64400979 |
| Fax: |
021-64400978 |
| E-mail: |
|
|
|
|
Home
