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Preparation method of high brilliancy environmental protection type alkaline earth ion solid solution titanate fluorescent powder

An environmentally friendly, high-brightness technology, applied in the field of material science, can solve the problems of no patent application, changing the chemical environment of the ion of the rare-earth luminescent center, lattice distortion, etc., to achieve high material stability, excellent luminescence performance, and high material stability. Effect

Inactive Publication Date: 2009-12-23
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

From the perspective of material structure, the element substitution effect between alkaline earth ions has not yet been used to introduce lattice distortion into the phosphor matrix, change the chemical environment around the rare earth luminescent center ion, and combine some special preparation process conditions to regulate the phosphor matrix. Structural defects, so as to obtain high-brightness phosphor research reports, and there is no related patent application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Chemically pure or analytically pure calcium carbonate CaCO 3 , strontium carbonate SrCO 3 , titanium dioxide TiO 2 and praseodymium nitrate Pr(NO 3 ) 3 Be raw material, be (Ca: Sr) by atomic ratio: Ti: Pr is (0.8: 0.2): 1: 0.002 take by weighing each raw material and prepare batching material, and mixture is put into the agate ball mill jar of 200ml, press mixture and agate The weight ratio of the ball milling medium is 1:1, add the agate ball milling medium with the size ratio, add an appropriate amount of deionized water according to the weight ratio of the mixture and deionized water as 1:1, and control the speed of ball milling in the planetary ball mill at 200r / min for 4 hours , the ball abrasive was dried in an oven at 80°C for 24 hours to obtain a loose powder sample of the mixture for firing, placed in a graphite crucible, heated to 1200°C at 10°C / min, kept for 3 hours, and obtained firing fluorescence after cooling For the powder, add absolute ethanol acco...

Embodiment 2

[0029] Chemically pure or analytically pure calcium carbonate CaCO 3 , strontium carbonate SrCO 3 , titanium dioxide TiO 2 and praseodymium nitrate Pr(NO 3 ) 3 Be raw material, be (Ca: Sr) by atomic ratio: Ti: Pr is (0.2: 0.8): 1: 0.002 take by weighing each raw material preparation batching material, the agate ball mill jar that the mixture is put into 200ml, press mixture and agate The weight ratio of the ball milling medium is 1:1. Add the agate ball milling medium with a size ratio, and add an appropriate amount of deionized water according to the weight ratio of the mixture to the deionized water as 1:1, and control the rotation speed in the planetary ball mill to 200r / min for ball milling. After 4 hours, the ball abrasive is dried in an oven at 80°C for 24 hours, and the dried material is pressed at 150 MPa into a small round block with a diameter of 25 mm and a thickness of 10-15 mm to obtain a mixture tablet for firing. Put the pressed tablet in a graphite crucible...

Embodiment 3

[0031] Chemically pure or analytically pure strontium carbonate SrCO 3 , barium carbonate BaCO 3 , titanium dioxide TiO 2 and praseodymium nitrate Pr(NO 3 ) 3 As raw material, by atomic ratio (Sr: Ba): Ti: Pr is (0.8: 0.2): 1: 0.002 Take each raw material and prepare batching material, the mixture is put into the agate ball mill jar of 200ml, press mixture and agate The weight ratio of the ball milling medium is 1:1. Add the agate ball milling medium with a size ratio, and add an appropriate amount of deionized water according to the weight ratio of the mixture to the deionized water as 1:1, and control the rotation speed in the planetary ball mill to 200r / min for ball milling. 4h, dry the ball abrasive in an oven at 80°C for 24 hours. Put the drying material in a graphite crucible, raise the temperature to 1250°C at 10°C / min, keep it warm for 4 hours, and obtain the fired fluorescent powder after cooling, add it according to the weight ratio of fired fluorescent powder an...

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Abstract

The invention discloses a composition formula and a preparation method of a high-brightness environment-friendly rare earth ion activated alkaline earth ion solid solution titanate fluorescent powder. The feature of the present invention is that on the basis of the rare earth ion activated alkaline earth titanate fluorescent powder matrix composed of a single alkaline earth element, by means of element substitution between alkaline earth ions and firing in a high temperature atmosphere, it is prepared to have low-voltage electron beam excitation and ultraviolet excitation. Alkaline earth ion solid solution titanate phosphor with high luminous brightness and material performance. The firing atmosphere can be a single gas or a mixture of air, CO, N2 or H2. Compared with the traditional single alkaline earth ion titanate fluorescent powder, the method has the characteristics of simple operation process, low cost and high brightness of the fluorescent powder. The phosphor has superior characteristics such as non-toxicity and high material stability, and can be widely used in information display fields such as electron beam excitation display screens.

Description

technical field [0001] The invention relates to a high-brightness environment-friendly alkaline earth ion solid solution titanate fluorescent powder and a preparation method thereof, specifically refers to a kind of high-brightness environment-friendly rare earth ion activated alkaline earth ion prepared by the element substitution effect between alkaline earth ions and firing in a high-temperature atmosphere The composition formula of solid solution titanate fluorescent powder and its preparation method belong to the field of material science and technology. Background technique [0002] With the rapid development of modern science and technology, luminescent materials have developed from general photoluminescence, display and lighting materials to luminescence excited by various excitation sources such as electricity, sound, heat, chemistry, biology, mechanical energy and high-energy rays, and are widely used. Key display materials used in high-tech products such as ultra-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/78
Inventor 洪樟连彭丽霞王民权
Owner ZHEJIANG UNIV
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