Enamel and preparation method thereof

A technology for enamel and enamel, applied in the field of enamel and its preparation, can solve the problems of reduced chemical stability and thermal stability of the enamel layer, difficulty in taking into account the enamel performance at sintering temperature, loss of corrosion resistance of the enamel layer, etc., and achieves excellent acid and alkali resistance. Corrosion performance, excellent acid and alkali corrosion resistance, good compactness

Active Publication Date: 2010-12-22
CHERY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, higher firing temperatures can also cause deformation of the substrate
In order to avoid the adverse effects caused by too high sintering temperature, it is expected to fire enamel products by using glazes with lower melting temperatures. However, as the melting temperature of glazes decreases, the chemical stability and thermal stability of the enamel layer will decrease. The stability will also be reduced, and in severe cases, the prepared enamel layer will lose its corrosion resistance
It can be seen that the sintering temperature of the prior art and the performance of the enamel are difficult to balance

Method used

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  • Enamel and preparation method thereof
  • Enamel and preparation method thereof
  • Enamel and preparation method thereof

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preparation example Construction

[0031] The preparation process of above-mentioned enamel is:

[0032] A. Mix and grind a variety of raw materials in proportion, then heat and melt to obtain molten glass, then pour the molten glass into cold water to quench, then take it out from the water, put it in an oven to dry to obtain a glass frit material, and then make the glass frit Put the material into a ball mill jar, add appropriate amount of crushed sand, clay, borax and soda ash for ball milling, and then sieve to obtain enamel powder.

[0033]B. Pretreatment of the substrate, which specifically includes the following steps: degreasing and degreasing with lye, pickling with acid solution, rinsing with distilled water, soaking in sodium carbonate solution to remove the residual acid solution during pickling, and finally drying.

[0034] C. Mix enamel powder and water in a certain proportion to form a slurry, put it in an airtight container and let it stand for a period of time to age the slurry to obtain a glaz...

Embodiment 1

[0043] Mix and grind raw materials, the composition and weight percentage of the raw materials are: 31.9% quartz sand; 35.8% borax decahydrate; 11.2% aluminum hydroxide; 8.2% fluorite; 7.0% soda ash; 0.8% cobalt oxide; Manganese oxide 4.2%, and then put the uniformly ground raw material into the heating furnace, heat it to 1100°C and keep it warm for 1 hour to melt it to obtain high-temperature molten glass. When the high-temperature molten glass in the molten state is drawn without knots, pour it into Quenched in cold water, then removed from the water and dried in an oven to produce cullet frit. The chemical composition and ratio of the glass frit material are: 45wt% SiO 2 , 18wt% B 2 o 3 , 10wt% Al 2 o 3 , 8wt% CaO, 12wt% Na 2 O, 1wt% CoO, 1wt% NiO, 5wt% Mn 2 o 3 .

[0044] Get again the glass frit material of 80wt%, the ground sand of 15wt%, the clay of 3wt%, the borax of 1wt%, the soda ash of 1wt% and put into ball mill jar, ball mill made powder for 20 hours, the...

Embodiment 2

[0049] Mix and grind raw materials, the components and weight percentages of the raw materials are: 37.6% of quartz sand; 31.7% of borax decahydrate; 10.6% of aluminum hydroxide; 6.6% of fluorite; 9.9% of soda ash; Manganese oxide 2.7%, then put the evenly ground raw material into the heating furnace and heat it to 1200°C and keep it warm for 1 hour to melt it. Remove from the water and dry in an oven to make a glass frit. The chemical composition and ratio of the glass frit material are: 50wt% SiO 2 , 15wt% B 2 o 3 , 9wt% Al 2 o 3 , 6wt% CaO, 16wt% Na 2 O, 0.5wt% CoO, 0.5wt% NiO, 3wt% Mn 2 o 3 .

[0050] Get again the glass frit material of 68wt%, the ground sand of 12wt%, the clay of 12wt%, the borax of 3wt%, the soda ash of 5wt% and put into the ball mill jar, ball mill made powder for 12 hours, then use 300 purpose Sieve through a sieve, and get the powder below 300 mesh as enamel powder.

[0051] Degrease and degrease the steel substrate with a lye at a temperat...

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Abstract

The invention provides enamel, which comprises a substrate and a ceramic glaze layer enamel-fired on the substrate, wherein the ceramic glaze layer is prepared by firing ceramic glaze powder which contains 60 and 90 weight percent of glass frit, 5 to 18 weight percent of crushed sand, 3 to 12 weight percent of clay, 0.3 to 5 weight percent of borax and 0.3 to 5 weight percent of soda ash. The enamel has excellent physiochemical performance such as low sintering temperature, corrosion resistance and the like. The method for preparing the enamel has the advantages of obtaining an enamel coating with high bonding strength and acid and alkali corrosion resistance at lower sintering temperature, solving the problem of substrate deformation, saving energy, and reducing production cost.

Description

technical field [0001] The invention relates to an enamel and a preparation method thereof. Background technique [0002] Enamel products are made by applying enamel glaze on the surface of the substrate and sintering at high temperature. During the sintering process, the grain boundaries gradually disappear and the pores are eliminated, thus forming a layer of enamel on the surface of the substrate. The enamel layer formed on the surface of enamel products mainly has the following characteristics: (1) It is not easy to age. Generally, organic coatings are easy to age, but the enamel layer is not easy to age, so that the service life of enamel products such as enamel pipes can be greatly improved; (2) There are a wide range of substrate materials, such as metal, plastic, fiber and other materials can be used as substrates for enamel; (3) The chemical properties are stable and can prevent the corrosion of various concentrations of organic acids (except hydrofluoric acid) and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C8/14
Inventor 焦方方
Owner CHERY AUTOMOBILE CO LTD
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