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Transparent long-afterglow glass ceramics and preparation method thereof

A technology of glass-ceramic and long afterglow, applied in the field of solid luminescent materials, can solve the problems of poor physicochemical stability of phosphate glass, limited practical application environment, poor luminescence performance, etc., and achieve stable physicochemical performance, low cost and good transparency. Effect

Active Publication Date: 2019-08-23
FUJIAN JIANGXIA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the mixed eutectic glass-ceramic with silicate glass matrix has poor transparency and poor luminous performance.
In 2015, Massera et al [JEur.Ceram.Soc.35(2015)1255] reported that Sr 4 Al 14 o 25 :Eu 2+ , Dy 3+ Long afterglow powder is doped into phosphate glass matrix to obtain long afterglow glass, but it is well known that phosphate glass has poor physical and chemical stability and is easy to absorb moisture, which limits its practical application environment

Method used

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  • Transparent long-afterglow glass ceramics and preparation method thereof
  • Transparent long-afterglow glass ceramics and preparation method thereof
  • Transparent long-afterglow glass ceramics and preparation method thereof

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preparation example Construction

[0040] The present invention also relates to a method for preparing the above-mentioned transparent long-lasting glass-ceramics, the method includes a two-step melt quenching method, and the steps are as follows:

[0041] Step (1) will P 2 o 5 , SiO 2 , BaO, SrO, CaO, ZnO, Al 2 o 3 , La 2 o 3 、Na 2 O. Li 2 O.B 2 o 3 、 Bi 2 o 3 , Sb 2 o 3 The powder raw material is weighed according to the composition ratio, heated and kept warm to melt it, and obtain the bulk precursor glass;

[0042] Step (2) Grinding the precursor glass obtained in step (1) into powder, adding SrAl 2 o 4 :Eu, Dy long afterglow powder is further ground, heated and kept warm to melt it to obtain block glass-ceramics.

[0043] Preferably, the method steps are as follows:

[0044] (1) will P 2 o 5 , SiO 2 , BaO, SrO, CaO, ZnO, Al 2 o 3 , La 2 o 3 、Na 2 O. Li 2 O.B 2 o 3 、 Bi 2 o 3 , Sb 2 o 3 The powder raw materials are weighed according to the proportion of the components, ground...

Embodiment 1

[0047] Example 1: P 2 o 5 , SiO 2 , BaO, SrO, CaO, ZnO, Al 2 o 3 , La 2 o 3 、Na 2 O. Li 2 O.B 2 o 3 、 Bi 2 o 3 , Sb 2 o 3 Powder raw materials according to 35P 2 o 5 -20SiO2 2 -10BaO-2SrO-2CaO-8ZnO-2Al 2 o 3 -1La 2 o 3 -5Na 2 O-5Li 2 O-6B 2 o 3 -2Bi 2 o 3 -2Sb 2 o 3 (mol%) After weighing the proportioning ratio, mix the raw materials evenly, pour them into a crucible, and heat up to 1050° C. for 1 hour in a resistance furnace to melt it. Then, the glass solution is quickly poured into a copper mold and cooled to form a transparent precursor glass. Then, the precursor glass was ground into powder, and 7wt% SrAl 2 o 4 :Eu, Dy long-lasting powder mixed evenly, placed in a resistance furnace at 850°C for 1 hour, then the glass melt was taken out and quickly poured into a copper mold to form a transparent long-lasting glass-ceramic. After cessation of light, it exhibits a long green afterglow.

[0048] figure 1 The medium transmittance curve shows t...

Embodiment 2

[0049] Example 2: P 2 o 5 , SiO 2 , BaO, SrO, CaO, ZnO, Al 2 o 3 , La 2 o 3 、Na 2 O. Li 2 O.B 2 o 3 、 Bi 2 o 3 , Sb 2 o 3 Powder raw materials according to 25P 2 o 5 -25SiO2 2 -10BaO-2SrO-3CaO-8ZnO-2Al 2 o 3 -2La 2 o 3 -6Na 2 O-6Li 2 O-7B 2 o 3 -2Bi 2 o 3 -2Sb 2 o 3 (mol%) After weighing the proportioning ratio, the raw materials were mixed evenly, poured into a crucible, and heated to 1020° C. for 1 hour in a resistance furnace to melt it. Then, the glass solution is quickly poured into a copper mold to form a transparent precursor glass. Then, the precursor glass was ground into powder, and 10wt% SrAl 2 o 4 : Mix Eu and Dy long-lasting powders evenly, place them in a resistance furnace at 830°C for 1 hour, then take out the glass melt and quickly pour it into a copper mold to form a transparent long-lasting glass-ceramic with maximum light transmittance 66%, which exhibits a green long afterglow. The emission wavelength of the prepared glass-c...

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Abstract

The invention provides transparent long-afterglow glass ceramics and a preparation method thereof. The structural of the glass ceramics has the characteristic that SrAl2O4:Eu,Dy long-afterglow crystallite is embedded in an oxide glass matrix, wherein the glass in the glass ceramics comprises the components: 40-80 mol% of P2O5+SiO2, 3-15 mol% of BaO+SrO+CaO, 5-20 mol% of ZnO+Al2O3+La2O3, 5-15 mol%of Na2O+Li2O and 5-20 mol% of B2O3+Bi2O3+Sb2O3, the sum of the content of the components is 100 mol%, and the content of the SrAl2O4: Eu,Dy crystallite is 1-15% of the oxide glass matrix by weight. The long-afterglow glass ceramics has the characteristics of high transparency, stable physical and chemical properties, high afterglow brightness and a long service life, and can be used as a long afterglow material in solar cells, building escape signs, road traffic indications, handicrafts and other fields.

Description

[0001] 【Technical field】 [0002] The invention relates to the field of solid luminescent materials, in particular to a transparent long-lasting glass-ceramic and a preparation method thereof. [0003] 【Background technique】 [0004] Long afterglow luminescent material, referred to as long afterglow material, is a kind of photoluminescent material that emits visible light when excited by a light source, and can store part of the light energy obtained. After the excitation stops, it slowly releases the energy in the form of visible light. Luminescent materials have important applications in many fields such as night traffic emergency instructions, instrument display, national defense and military (such as night travel maps), and are expected to be applied to cutting-edge scientific and technological fields such as solar cells, life sciences, and the universe. [0005] Traditional long afterglow materials are mainly powders, which will age quickly and have a limited service life ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/02
CPCC03C10/00
Inventor 余运龙周思莹李小燕关翔锋罗培辉钟小铃
Owner FUJIAN JIANGXIA UNIV
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