A kind of rare earth oxide coating and preparation method thereof

A technology of rare earth oxides and oxides, applied in the field of nano-functional coatings, to achieve the effects of easy industrial production, simple process and low cost

Inactive Publication Date: 2016-08-24
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the limitations of the existing rare earth oxide anti-fog coating and related material preparation technology, the present invention provides a rare earth oxide coating, which has high hydrophobicity and can be used on the surface of various ceramics and glass products

Method used

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  • A kind of rare earth oxide coating and preparation method thereof
  • A kind of rare earth oxide coating and preparation method thereof
  • A kind of rare earth oxide coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) Weigh 5 grams of cerium nitrate, add 2L of water and stir to obtain a transparent solution, then titrate and add 20 mL of 25% ammonia water, and stir for 30 minutes to obtain a colloidal solution of cerium hydroxide.

[0045] (2) Apply the above-mentioned colloidal solution on the surface of the cleaned glass by spraying to form a nanometer layer, and dry it under air conditions.

[0046] (3) Put the glass in (2) above into a muffle furnace, heat it at 450°C for 5 hours under air conditions, and cool it down to room temperature naturally to prepare a hydrophobic coating with a thickness of about 50 nanometers. figure 1 The atomic force microscope photo of the sample is shown. It can be seen from the photo that the hydrophobic coating on the glass surface is composed of cerium oxide nanoparticles with uniform size. The particle size is about 50 nanometers, and the grains are densely connected.

Embodiment 2

[0048] (1) Weigh 30 g of cerium acetate, add 5 L of water and stir to obtain a transparent solution, then titrate and add 100 mL of 25% ammonia water, and stir for 1 hour to obtain a colloidal solution of cerium hydroxide.

[0049] (2) Apply the above-mentioned colloidal solution to the surface of the cleaned ceramic sanitary ware by spraying to form a nanometer layer, and dry it under air conditions.

[0050] (3) Put the sanitary ware in (2) above into a tunnel kiln, heat at 700°C for 5 hours under air conditions, and cool naturally to room temperature to prepare a cerium oxide hydrophobic coating with a thickness of about 100 nanometers. figure 1 The atomic force microscope photo of the sample is shown. It can be seen from the photo that after heat treatment, a layer of hydrophobic coating composed of cerium oxide particles with a size of 30-100 nanometers is added to the surface of the substrate, and the thickness of the cerium oxide layer is about 100 nanometers. , The par...

Embodiment 3

[0052] (1) Weigh 15 grams of cerium oxide powder, add it to 1L of water and grind it to a particle size of 300 nanometers, and disperse it in water to obtain a translucent emulsion.

[0053] (2) Apply the above-mentioned emulsion on the surface of the cleaned alumina ceramics by inkjet printing, and dry under air conditions.

[0054] (3) Put the above-mentioned alumina ceramics in (2) into a roller kiln, heat-treat at 1200°C for 5 hours under air conditions, and form a 400-nanometer cerium oxide hydrophobic coating on the surface of the substrate after cooling to room temperature . The resulting coating was examined with a scanning electron microscope, as image 3 As shown in the figure, the size of the cerium oxide particles on the ceramic surface is about 400 nanometers, the particle size is uniform, and the particles are closely connected.

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Abstract

The invention discloses a rare earth oxide coating and a preparation method thereof. The component of the coating is a rare earth oxide, the thickness of the coating is 30-400nm, and the coating is made of a rare earth oxide or a rare earth salt. Covered with the surface of glass, ceramics and other substrates, it is formed by high temperature heat treatment at 450‑1600 °C. The method is simple in process and low in cost, and the obtained coating has high hydrophobicity, self-cleaning, anti-fog, corrosion resistance and other functions, and can be widely used in the preparation of high-grade anti-fog glass on the surface of window glass, automobile glass, etc., and can also be used in high-grade daily It can be used in construction and sanitary ceramics and various fine ceramic surfaces, and has a good application prospect.

Description

technical field [0001] The invention relates to a rare earth oxide coating and a preparation method thereof, in particular to a rare earth oxide coating with high hydrophobicity and a preparation method thereof, and belongs to the technical field of nanometer functional coatings. Background technique [0002] Due to its special 4f electronic structure, rare earth oxide materials will show high hydrophobicity (contact angle greater than 100 degrees) when the phase composition and grain boundary meet certain conditions. water layer. The thickness of the hydrophobic coating with a raspberry structure is mostly on the micron scale, and it can be prepared by using organic materials, but usually the heat resistance temperature is low, and silicate is also used to add TiO 2 Although the heat-resistant temperature is increased, the properties of these materials will have an adverse effect on the properties of the matrix material, especially for various fine ceramic products. For a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C17/23C04B41/85
Inventor 杨萍车全德贺海燕
Owner UNIV OF JINAN
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