Tri-band Phosphor

Blue Powder

• Composition: Calcium chlorborate activated by europium (Ca₂B₅O₉Cl:Eu₂₊)
• Characteristics: White powder with a relative density of 2.11, emitting blue luminescence when activated by 253.7nm ultraviolet rays. Main peak at 445nm with a half-width of 42nm. Colour coordinates: x = 0.147, y = 0.041.

Green Powder

• Composition: Lanthanum phosphate activated by cerium and terbium.
• Characteristics: White powder with a relative density of 5.20, emitting blue luminescence when activated by 253.7nm ultraviolet rays. Main peak wavelength at 543nm with a half-width of 6nm. Colour coordinates: x = 0.344, y = 0.580. Quantum efficiency is 91%.

Red Powder

• Composition: Yttrium oxide activated by europium.
• Characteristics: White powder with a relative density of 5.05, emitting orange-red fluorescence when stimulated by 253.7nm ultraviolet and cathode rays. Main peak wavelength at 611nm. Colour coordinates: x = 0.651, y = 0.346. Quantum efficiency is 84%.

Phosphor Powder for Rare Earth Tri-phosphor Lamp: A mixed fluorescent material combining red, green, and blue powders in specific proportions to achieve various color temperatures (e.g., 6400K, 2900K, 3200K, 5000K, 2700K).

• Composition: Rare earth ion-based powders, including aluminate, phosphate, and borate systems.
• Characteristics: Low-pressure fluorescent lamps coated with this compound system exhibit high brightness (90-1001 m/W), wide color temperature range, high visible color exponent (up to 80), low light attenuation, and long life with energy-saving properties.
• Usage: Extensively employed in compact energy-saving fluorescent lamps due to their strong resistance to high-energy ultraviolet radiation (185nm), excellent thermal stability, and ability to maintain high brightness even at 120°C.

Table I (powder color temperature, KF)

Table II (lamp color phosphor, KD)

OEM is acceptable