Which application historically used terbium-based phosphors prominently before modern LEDs?

CRT (cathode-ray tube) color displays and fluorescent lamps

In commercial phosphors, terbium is most often used as a dopant in which host ion family to produce green light?

Rare-earth-activated oxides (e.g., yttrium garnets/oxides)

Fuel additive for internal combustion engines

Main alloying element in stainless steel

Primary component of lithium-ion battery cathodes

Green phosphors for lighting and displays

High-temperature superconductivity

Magnetostriction (large magnetostrictive strains)

Optical transparency in the infrared

Because Tb3+ has a stable half-filled 3d subshell

Because the +3 state yields localized 4f electrons that give sharp luminescent lines

Because it has a filled 4f shell

Because +3 allows formation of strong metallic bonds

Magnetostrictive actuators and sensors

High-performance permanent magnets

10 questionsSign in to saveupdated 4 days ago

Quizzes · Knowledge

Random

Preview · 10 questions

01Which application historically used terbium-based phosphors prominently before modern LEDs?
02In commercial phosphors, terbium is most often used as a dopant in which host ion family to produce green light?
03Which of the following is a principal commercial application of terbium?
04Terbium is an important component of Terfenol-D, which is valued for what property?
05Why is the trivalent state (Tb3+) stable and chemically important in terbium compounds used in phosphors?
06Which electronic transition of Tb3+ is primarily responsible for the characteristic green emission?
07In addition to phosphors and magnetostrictive alloys, terbium is commonly alloyed with which element to make high-performance magnet materials?
08Which oxidation state of terbium is most commonly responsible for its luminescence in green phosphors?
09What is the atomic number of terbium?
10Which market/industry is NOT a principal commercial user of terbium-containing materials?