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Manganese-doped titanate-based red luminescent material and preparation method and application thereof

A red light-emitting, titanate technology, applied in the directions of light-emitting materials, chemical instruments and methods, electrical components, etc., can solve the problems of difficult LED chip matching, low color rendering index, cold light and other problems, achieving low cost, easy products, The effect of no waste water and exhaust gas emissions

Active Publication Date: 2016-01-06
徐州博创建设发展集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, white LEDs are expected to become a new generation of green lighting sources. However, compared with sunlight, white LEDs used in the market have many defects, such as high color temperature and low color rendering index due to the lack of red components in the emission spectrum. , so that the light feels cold and the color rendering is poor when lighting. In order to meet the needs of indoor lighting, it is necessary to add an appropriate proportion of red phosphor to improve the color temperature and color rendering index of the LED light source.
for Eu 3+ Activated phosphor, due to its absorption in the near ultraviolet region from Eu 3+ forbidden f-f Transition absorption is narrow-band absorption, which is difficult to match with LED chips

Method used

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  • Manganese-doped titanate-based red luminescent material and preparation method and application thereof
  • Manganese-doped titanate-based red luminescent material and preparation method and application thereof
  • Manganese-doped titanate-based red luminescent material and preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Preparation of BaAl by High Temperature Solid Phase Method 6 TiO 12 : 0.12Mn 4+ , That is, mix various oxides or carbonates as raw materials according to the target composition stoichiometric ratio, and then synthesize them in an air atmosphere under normal pressure.

[0036] First, according to the chemical formula BaAl 6 TiO 12 : 0.12Mn 4+ The stoichiometric molar ratio of each element in the 3 ) 2 : 0.8711 g, Al(NO 3 ) 3 9H 2 O: 7.5226 g, TiO 2 : 0.2662 g, MnCO 3 : 0.046g, grind and mix well in an agate mortar.

[0037] Then the mixture was calcined for the first time in an air atmosphere at a temperature of 800° C. for 1 hour, then cooled to room temperature, and a sample was taken out.

[0038] The raw materials calcined for the first time are fully mixed and ground evenly, and calcined again in the air atmosphere, the sintering temperature is 1200°C, the calcination time is 5 hours, and then cooled to room temperature to obtain powdery Mn 4+ Doped tit...

Embodiment 2

[0044] Preparation of BaAl by High Temperature Solid Phase Method 6 TiO 12 : 0.25Mn 4+ , according to the chemical formula BaAl 6 TiO 12 : 0.25Mn 4+ The stoichiometric molar ratio of each element in the , respectively weighed BaCO 3 : 0.6578 g, Al 2 o 3 9H 2 O: 1.975 g, TiO 2 : 0.2662 g, MnO 2 : 0.059 g, after grinding and mixing uniformly in an agate mortar, the first calcination was carried out under air atmosphere, the temperature was 600 ° C, the calcination time was 3 hours, then cooled to room temperature, and the sample was taken out; the first calcination The raw materials are fully mixed and ground again, and calcined again in the air atmosphere, the sintering temperature is 800 ° C, the calcination time is 10 hours, and then cooled to room temperature, that is, the powdered Mn 4+ Doped titanate-based red luminescent material.

[0045] After observation, the BaAl prepared in Example 2 6 TiO 12 : 0.25Mn 4+ The main structural properties, excitation, and e...

Embodiment 3

[0047] Preparation of BaAl by High Temperature Solid Phase Method 6 TiO 12 : 0.001Mn 4+ , according to the chemical formula BaAl 5.999 TiO 12 : 0.001Mn 4+ The stoichiometric molar ratio of each element in the 3 COO) 2 Ba: 0.8507 g, Al(OH) 3 : 1.5598 g, TiO 2 : 0.2662 g, Mn(NO 3 ) 2 4H 2 O: 0.0008 g, after grinding and mixing in an agate mortar, carry out the first calcination under the air atmosphere, the temperature is 300 ℃, the calcination time is 10 hours, then cool to room temperature, take out the sample; the first calcination The raw materials are fully mixed and ground again, and calcined again in the air atmosphere, the sintering temperature is 1600 ° C, the calcination time is 1 hour, and then cooled to room temperature, that is, powdery Mn 4+ Doped titanate-based red luminescent material.

[0048] After observation, the BaAl prepared in Example 3 6 TiO 12 : 0.001Mn 4+ The main structural properties, excitation, and emission spectra are similar to thos...

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Abstract

The invention discloses a manganese-doped titanate-based red luminescent material and a preparation method and an application thereof. The red luminescent material has the chemical general formula of BaAl6TiO12:xMn<4+>, wherein x is the Mn<4+> doped molar percentage coefficient, and 0.001<=x<=0.25; the red luminescent material can be prepared by using a high temperature solid phase method or a sol-gel method, moreover, has good chemical stability, can emit red rays with the wavelength range of 620-750 nm when excited by ultraviolet, near ultraviolet, blue rays or other excitation light sources, has broader excitation spectral range, has strong absorption at the wavelength of 355 nm, and is perfectly matched with commercial blue chips.

Description

technical field [0001] The invention relates to a manganese-doped titanate-based red luminescent material and a preparation method and application thereof, belonging to the field of solid fluorescent materials. Background technique [0002] The new light source, white light LED, has broad application value and huge market prospect due to its advantages of small size, energy saving, long life and no pollution. At present, white LEDs are expected to become a new generation of green lighting sources. However, compared with sunlight, white LEDs used in the market have many defects, such as high color temperature and low color rendering index due to the lack of red components in the emission spectrum. , so that the light feels cold and the color rendering is poor during lighting. In order to meet the needs of indoor lighting, it is necessary to add an appropriate proportion of red phosphor to improve the color temperature and color rendering index of the LED light source. for Eu...

Claims

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Application Information

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IPC IPC(8): C09K11/67H01L33/50
CPCY02B20/00
Inventor 乔学斌
Owner 徐州博创建设发展集团有限公司
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