Preparation method of fluorescent ceramic containing aluminum oxide matrix and related fluorescent ceramic
A technology of fluorescent ceramics and alumina, applied in the preparation of fluorescent ceramics and related fluorescent ceramics field, can solve the problems of low thermal conductivity and low luminous efficiency of fluorescent ceramics, and achieve high thermal conductivity, high luminous efficiency, and improved thermal conductivity. Effect
Active Publication Date: 2017-10-24
APPOTRONICS CORP LTD
5 Cites 23 Cited by
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Abstract
The invention provides a preparation method of a fluorescent ceramic containing aluminum oxide matrix. The preparation method sequentially comprises the following steps: mixing aluminum oxide, fluorescent powder and a sintering additive and calcining to obtain fluorescent ceramic precursor powder; sintering the powder to obtain the fluorescent ceramic. The grain diameter of each component is selected to be a pre-set size and the fluorescent ceramic precursor powder is subjected to high-pressure treatment under the condition of 5MPa or above before a sintering process; the fluorescent ceramic precursor powder bears the high pressure of 30MPa to 200MPa in the sintering process and the sintering temperature is 1250 DEG C to 1550 DEG C; the sintering is carried out under an oxygen-free atmosphere. According to the preparation method provided by the invention, the aluminum oxide enters a liquid phase at relatively low temperature under the condition that the fluorescent powder has an unchanged crystal new look in a preparation process and the uniform and dense fluorescent ceramic with low porosity is obtained; the heat-conducting performance and luminous efficiency of the fluorescent ceramic are extremely improved.
Application Domain
Luminescent compositions
Technology Topic
FluorescenceHigh pressure +9
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PUM
Property | Measurement | Unit |
Particle size | 0.05 ~ 0.1 | µm |
Particle size | 0.05 ~ 1.0 | µm |
Melting point | 1970.0 | °C |
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