Lawrence Livermore National Laboratory (LLNL) and Oak Ridge National Laboratory (ORNL) have created new kinds of fluorescent lighting phosphors that use far less rare-earth elements than current technology.
Rare-earth elements are hard to come by. The United States has access to a limited amount of rare-earth elements and relies on imports.
Today the phosphors in fluorescent lighting consume more than 1,000 metric tons of rare-earth oxides yearly, including europium (Eu), terbium (Tb), cerium (Ce) and lanthanum (La), as well as even larger amounts of yttrium (Y) oxide.
While LED lighting will likely replace fluorescent tubes eventually, low-cost linear fluorescent lighting is expected to remain a dominant feature in the U.S. infrastructure for more than a decade.
Therefore it is necessary to replace the current triphosphor blend discovered more than 30 years ago (based on a mixture of blue, green and red emitters) because of its high rare earth consumption.
The GE, LLNL and ORNL team, funded by the Department of Energy’s Office of Energy Efficiency and Renewable Energy and working with the Critical Materials Institute (CMI) at Ames Laboratory, have identified a green phosphor, which reduces the Tb content by 90 percent and eliminates La, while the new red phosphor eliminates both Eu and Y and is rare-earth free.
These proposed phosphors appear to be close to meeting stringent requirements of long lamp survivability, high efficiency, precise color rendition and low-cost; the blue phosphor has inherently low rare-earth content and need not be replaced.
“The fundamental physics of these phosphors is compelling, and we are taking the next steps to assess their feasibility for commercial lighting by evaluating chemical issues such as slurry compatibility and improving the synthetic procedures,” said Steve Payne, the CMI thrust leader on the project.
Read more: Better fluorescent lighting through physics
The Latest on: Rare-earth elements
via Google News
The Latest on: Rare-earth elements
- Rare Earth Metals Get the Presidential Treatmenton October 11, 2020 at 5:00 am
Last Wednesday, the president signed an executive order addressing the threat posed by the United States’ overreliance on “critical minerals” from “foreign adversaries.” To be more specific, “critical ...
- Geologists Solve Long-Standing Puzzle That Could Pinpoint Valuable Rare Earth Element Depositson October 9, 2020 at 9:55 pm
Pioneering new research has helped geologists solve a long-standing puzzle that could help pinpoint new, untapped concentrations of some the most valuable ...
- Study: Geologists solve puzzle that could predict valuable rare earth element deposits (TDnews)on October 9, 2020 at 11:40 am
Pioneering new research has helped geologists solve a long-standing puzzle that could help pinpoint new, untapped concentrations of some the most valuable rare earth deposits. view more Credit Image: ...
- Geologists solve puzzle that could predict valuable rare earth element depositson October 9, 2020 at 11:11 am
Pioneering new research has helped geologists solve a long-standing puzzle that could help pinpoint new, untapped concentrations of some the most valuable rare earth deposits.
- Election result won't affect American Resources Corp's rare-earth output: CEOon October 9, 2020 at 12:06 am
Mark Jensen, CEO of American Resources Corp., says President Trump's executive order to boost national self-sufficiency in rare-earth elements does not clash with Joe Biden's environmental agenda. He ...
- American Resources Begins Sifting Coal Mining Waste to Produce Rare Earth Elementson October 7, 2020 at 11:34 pm
When American Resources Corp. (NASDAQ: AREC) reported quarterly results in late July, the company said it created a wholly-owned subsidiary, ...
- Fortress Value Acquisition: An Interesting Opportunity In North American Rare-Earthson October 7, 2020 at 3:59 pm
President Trump recently signed an executive order intended to encourage the production of rare-earth elements in the United States.
- American Resources stock soars, after unveiling of new rare earth subsidiaryon October 7, 2020 at 8:09 am
Shares of American Resources Corp. (AREC) nearly doubled in very active morning trading Wednesday, after the raw materials supplier unveiled its new subsidiary, American Rare Earth LLC, to organize ...
- American Resources Corporation Unveils Rare Earth Element Wholly Owned Subsidiary, American Rare Earth LLCon October 7, 2020 at 6:00 am
FISHERS, IN/ ACCESSWIRE/ October 7, 2020/ American Resources Corporation, a supplier of raw materials to the rapidly growing global infrastructure marketplace, today unveiled its wholly owned ...
- The collapse of American rare earth mining — and lessons learnedon October 6, 2020 at 6:19 am
In this commentary, a reader argues it's the U.S. government’s responsibility to set the stage for increased American rare earth production.
via Bing News