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Preparation method of zinc oxide antireflection film for transparent aluminum oxide ceramic
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A technology of alumina ceramics and zinc oxide, which is applied in the field of preparation of zinc oxide antireflection films for transparent alumina ceramics, and achieves the effects of good interface bonding, easy realization and improved energy utilization.
Inactive Publication Date: 2014-06-25
JIANGSU UNIV
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The field of lighting is the most widely used field of transparent alumina ceramics. Although the technology of preparing non-porous high-strength transparent alumina ceramics has been perfected day by day, how to further effectively improve its light transmittance under the existing mature preparation technology is a problem in this field. big difficulty
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Embodiment 1
[0019] According to the zinc ion concentration of 0.3mol / L, the Zn(CH 3 COO) 2 2H 2 O was dissolved in ethanol under magnetic stirring, and a small amount of diethanolamine was added to adjust the viscosity. Aged at 40°C for 20 hours to obtain a uniform and stable transparent precursor sol. The thin film was prepared by the pulling method, the falling speed was 400 μm / s, the substrate was immersed in the sol for 60 s, the pulling speed was 200 μm / s, 4 layers of thin film were coated, the annealing temperature was 600 °C, and the time was 4 h.
[0020] The light transmittance test results of the zinc oxide anti-reflection film for transparent alumina ceramics prepared in this embodiment are as follows figure 1 shown.
Embodiment 2
[0022] According to the zinc ion concentration of 0.5mol / L, Zn(CH 3 COO) 2 2H 2 O was dissolved in ethanol under magnetic stirring, and a small amount of diethanolamine was added to adjust the viscosity. Aged at 40°C for 20 hours to obtain a uniform and stable transparent precursor sol. The film was prepared by the pulling method, the falling speed was 400 μm / s, the substrate was immersed in the sol for 60 s, the pulling speed was 200 μm / s, 4 layers of thin film were coated, the annealing temperature was 800 °C, and the time was 2 h.
[0023] The light transmittance test results of the zinc oxide anti-reflection film for transparent alumina ceramics prepared in this embodiment are as follows figure 2 shown.
Embodiment 3
[0025] According to the zinc ion concentration of 0.7mol / L, Zn(CH 3 COO) 2 2H 2 O was dissolved in ethanol under magnetic stirring, and a small amount of diethanolamine was added to adjust the viscosity. Aged at 40°C for 20 hours to obtain a uniform and stable transparent precursor sol. The thin film was prepared by pulling method, the descending speed was 400 μm / s, the dipping time of the substrate in the sol was 60 s, the pulling speed was 200 μm / s, 4 layers of thin film were coated, the annealing temperature was 900 °C, and the time was 1 h.
[0026] The light transmittance test results of the zinc oxide anti-reflection film for transparent alumina ceramics prepared in this embodiment are as follows image 3 shown.
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Abstract
The invention relates to a preparation method of a zinc oxide antireflection film for a transparent aluminum oxide ceramic. The preparation method comprises the following steps: adopting a common transparent aluminum oxide ceramic, zinc acetate (Zn(CH3COO)2.2H2O) with the purity higher than 99%, diethanol amine (C4H11NO2) and ethanol (CH3CH2OH) as raw materials, taking the transparent aluminum oxide ceramic as a substrate, regulating parameters such as annealing temperature, annealing time and zinc ion concentration, and adopting a sol-gel method to prepare the zinc oxide antireflection film. The novel transparent aluminum oxide ceramic which is plated with the zinc oxide antireflection film has higher light transmittance, excellent interface bonding, can be used as a sodium lamp discharge tube, and can be widely used for the field of illumination, so as to greatly improve the energy utilization ratio and largely increase the added value of the transparent aluminum oxide ceramic product. Compared with the international like products, the novel transparent aluminum oxide ceramic has better competitiveness.
Description
technical field [0001] The invention relates to a method for preparing a zinc oxide antireflection film for transparent alumina ceramics, belonging to the technical field of functional ceramic film material manufacturing. Background technique [0002] Among the known transparent ceramic materials, alumina occupies an important place. Transparent alumina ceramics have a series of advantages such as wide range of light transmission, high thermal conductivity, low electrical conductivity, high hardness, high strength, low dielectric constant and dielectric loss, good wear resistance and corrosion resistance. These excellent properties make transparent alumina ceramics gradually become a research hotspot, and are increasingly widely used in the fields of optics, special instrument manufacturing, electronic technology and high-temperature technology, aerospace, and national defense and military industries. The field of lighting is the most widely used field of transparent alumin...
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