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Preparation of enamel coating modified by rare earth doping and nanometer effect

A technology of enamel and enamel glaze, which is applied in the field of composite materials and can solve the problems of insufficient heat resistance and thermal shock strength

Inactive Publication Date: 2016-01-27
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It has high hardness and good acid resistance, but insufficient heat resistance and thermal shock strength

Method used

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  • Preparation of enamel coating modified by rare earth doping and nanometer effect
  • Preparation of enamel coating modified by rare earth doping and nanometer effect
  • Preparation of enamel coating modified by rare earth doping and nanometer effect

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Embodiment Construction

[0015] According to the present invention, a kind of preparation method of industrial enamel composite material is provided, the method comprises introducing a certain proportion of the mixture of nano-silicon dioxide and rare earth oxide (cerium oxide or lanthanum oxide) into the enamel glaze in the manner of grinding and adding simultaneously , and include the following steps:

[0016] (1) Weighing: Weigh the raw materials and mix them evenly;

[0017] (2) Drying: place the uniformly mixed raw materials in a drying oven at 700-800°C for 1.5 hours (h) to remove moisture and gas from the raw materials;

[0018] (3) High-temperature melting: Put the dried raw materials into the crucible and keep it warm at 1200-1300°C for 1.5h until there are no nodes in the wire drawing;

[0019] (4) quenching: the raw material after melting is dropped into cold water immediately, rapidly cools to room temperature, obtains the frit after quenching, then dry;

[0020] (5) Ball milling pulping...

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Abstract

The performance of enamel is influenced by material composition, preparation technology, component granularity, etc. A mixture of rare earth oxide and nanometer silica is doped according to a certain ratio and the functions of activation and modification of the rare earth oxide are performed so as to facilitate reduction in firing temperature of the enamel, improvement of suspendability of glaze slip, buffering of thermal stress of the enamel, densification of porcelain glaze, etc.; and nanometer silica has high chemical activity and can obviously improve the integrity of a silicate network structure. Through cooperative effect of the rare earth oxide and nanometer silica, the prepared enamel coating has excellent overall performance and can meet performance demands in fields like modern industry and national defense. An optimal doping ratio of 96% of a glaze block, 3% of the rare earth oxide and 1% of the nanometer silica (SiO2) is obtained through experiment and exploration; and the prepared enamel coating has a uniform and compact surface, good adhesion, good bending resistance and substantially improved stability to acid chemicals, heat resistance, thermal shock resistance and shock strength. The matrix glaze of the enamel comprises zinc oxide, silica, alumina, titanium oxide, nickel oxide, cobalt nitrate, phosphoric pentoxide, calcium fluoride, boric acid and sodium carbonate and is prepared through melting at 1150 to 1250 DEG C.

Description

technical field [0001] The invention relates to a composite material and a preparation method thereof, in particular to an industrial enamel composite material and a preparation method thereof, and belongs to the technical field of composite materials. Background technique [0002] Enamel is a composite material in which inorganic vitreous materials are condensed on the base metal by melting and firmly combined with the metal. Enamel is mainly applied to the surface of steel plate, cast iron or aluminum products to improve the appearance and protect the metal surface. As a protective coating on metal surfaces, enamel is widely used in various industries and defense departments such as machinery, metallurgy, construction, electronics, light industry, and instrumentation, as well as in agriculture and people's daily life. Metal surface modification technology has a wide range of uses. Therefore, it is of theoretical research significance and practical application value to con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C8/14
Inventor 许越何垚蒿
Owner BEIHANG UNIV
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