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Luminous ceramic and preparation thereof

A technology of luminous ceramics and ceramics, applied in the field of ceramics, can solve the problems of unsatisfactory performance, low firing temperature of glaze, poor quality of glaze surface, etc., and achieve high transparency of glaze surface, glaze invariance, afterglow time long effect

Inactive Publication Date: 2009-08-12
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the luminescent ceramic glazes used in the applied patents adopt copper or erbium and gallium as the luminescent powder of the sulfide {ZnO or (Zn, Gd) S} of the activator ([2][P]. Chinese patent application number 88103858 , Bulletin No. 1039238; [3] Wang Jian, Zhang Laiping, New Ceramic Pigment - Luminous Powder [J]. Jingdezhen Ceramics, 1990, 2:16; [4] Zhang Yunan [J]. Preparation of Luminous Powder and Blending of Luminous Glaze. Jingdezhen Ceramics, 1990, 4:17) or a single Eu-excited aluminate with long afterglow as luminescent powder ([5] Guo Qingjie, Xu Mingxia, Cao Peiling, etc.Eu 2+ Research status of activated alkaline earth aluminate long afterglow luminescent materials. Rare Metal Materials and Engineering, 2004, 33(3): 225-228), its disadvantages are relatively low luminous brightness, short afterglow time, and low glaze firing temperature , the quality of the glaze is not good when used, and its performance is unsatisfactory

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1) Preparation of luminous glaze slurry: mix transparent glaze powder, aluminate compound activated by luminescent powder rare earth and fumed silica, grind into luminous glaze, add ethylene glycol as suspension medium to prepare luminous glaze slurry; by mass percentage , the transparent glaze powder is 89.3%, the luminescent powder is 10%, and the gas phase silica is 0.7%. According to the mass ratio, the amount of ethylene glycol added is 3 times that of the luminescent glaze; the luminescent powder is activated by rare earth alumina Salt compound whose chemical composition is SrAl 2 o 4 :Eu 2+ , Dy 3+ .

[0025] 2) Glazing: apply a luminous glaze layer on the ceramic body or glazed ceramic surface by dipping to obtain a luminous ceramic after glazing; the thickness of the luminous glaze layer is 0.15 mm.

[0026] 3) Heat treatment: Put the glazed luminescent ceramics into a muffle furnace for heat treatment in a reducing atmosphere. The temperature of the heat t...

Embodiment 2

[0027] Embodiment 2: Similar to Example 1, the difference is that by mass percentage, transparent glaze powder is 84.5%, luminescent powder is 15%, and fumed silica is 0.5%. By mass ratio, the addition of ethylene glycol is luminescent 3.5 times that of the glaze; the heat treatment temperature is 950°C, and the heating rate is 10°C / min.

Embodiment 3

[0028] Embodiment 3: Similar to Example 1, the difference is that by mass percentage, transparent glaze powder is 79.1%, luminescent powder is 20%, and fumed silica is 0.9%. By mass ratio, the addition of ethylene glycol is luminescent 2 times that of the glaze; the heat treatment temperature is 920°C, and the heating rate is 8°C / min.

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Abstract

The invention provides a luminescent ceramic and a preparation method thereof, relates to a ceramic, and provides the luminescent ceramic which can continuously luminesce in a dark place, does not pollute the environment, and has good chemical stability, high luminescent brightness and long persistence after the luminescent ceramic absorbs visible light and the preparation method thereof. The luminescent ceramic can be mainly used in fire safety evacuation signs, decorative ceramics and the like. The luminescent ceramic comprises a ceramic blank or glazed ceramic, and a luminescent glazed layer on the ceramic blank or the glazed ceramic. The preparation method comprises the following steps: luminescent glaze slip preparation, in which transparent glaze powder, luminescent powder and gas phase silicon dioxide are mixed, are grinded into luminescent glaze material, and are added with glycol as a suspending medium to prepare the luminescent glaze slip; glaze application, in which the luminescent glaze layer is applied to the surface of the ceramic blank or the glazed ceramic by adopting a dipping method to obtain the glazed luminescent; heat treatment, in which the glazed luminescent ceramic is subjected to heat treatment under reductive atmosphere to obtain the final luminescent ceramic product.

Description

technical field [0001] The invention relates to a ceramic, in particular to a luminous ceramic and a preparation method thereof. technical background [0002] Light-storing luminescent material is a material that can absorb and store light energy when it is irradiated by a light source such as visible light or ultraviolet light, and then slowly release the stored light energy to emit visible light in a dark state. The material can be made into fire safety evacuation signs, interior and exterior wall bricks, arts and crafts and other ceramic products. It can not only play the role of lighting, marking and decoration, but also facilitate and beautify people's life, and can also greatly save energy. [0003] Traditional fluorescent materials represented by ZnS have shortcomings such as short luminous time, low luminous brightness, and poor light resistance ([1] Sun Yuanliang, Pang Maolong, Wang Ning, Wang Baofeng, Chen Zukun. Development of ZnS-based luminescent ceramic glaze ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/86C03C8/00C09K11/80
Inventor 熊兆贤高芳
Owner XIAMEN UNIV
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