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Lanthanum chloride-coated nano-magnesia-based ceramic core

A technology of magnesium oxide-based ceramics and nano-magnesia powder, which is applied in the field of precision casting, can solve problems such as core collapse, achieve the effect of enhancing sintering performance and stability, and not easily deformed

Active Publication Date: 2015-10-21
WUHU ZHEXIN NEW ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cores prepared by the above patents undergo a hydration reaction when exposed to water, causing the cores to collapse. Therefore, the above cores are difficult to be practically applied in the field of titanium alloy precision casting

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A lanthanum chloride-coated nano-magnesia-based ceramic core, which is made up of the following raw materials in percentage by weight:

[0026] Mineralizer 10wt%, plasticizer 15wt%, and the balance is lanthanum chloride-coated nano-magnesia powder;

[0027] The mineralizer is zirconia;

[0028] Described plasticizer is made up of the raw material of following weight part:

[0029] Paraffin wax 90, propolis 34, terpene resin 4, polyethylene oxide 2, silane coupling agent KH550 0.2;

[0030] Heat the above-mentioned terpene resin to soften, add polyethylene oxide, stir evenly, add the remaining raw materials, stir and disperse at 600 rpm for 4 minutes, cool and discharge to obtain the plasticizer;

[0031] Described lanthanum chloride-coated nano-magnesia powder is made up of the following raw materials in parts by weight:

[0032] Nano-magnesium oxide 120, sodium hexametaphosphate 2, lanthanum chloride 17, deionized water in proper amount;

[0033] The preparation me...

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PUM

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Abstract

The invention discloses a lanthanum chloride coated nano magnesium oxide based ceramic core consisting of the following raw materials in percentage by weight: 5-20% of mineralizer, 10-15% of plasticizer and the balance of lanthanum chloride coated nano magnesium oxide powder. According to the lanthanum chloride coated nano magnesium oxide based ceramic core disclosed by the invention, lanthanum chloride coated nano magnesium oxide is used as an aggregate of the ceramic core, the sintering performance and stability of nano magnesium oxide can be enhanced, enough strength of the ceramic core can be ensured, and the ceramic core can not be easily deformed in molding, carrying and furnace charging.

Description

technical field [0001] The invention mainly relates to the field of precision casting, in particular to a nano-magnesia-based ceramic core coated with lanthanum chloride. Background technique [0002] The complex inner cavity of the alloy casting is mainly formed by using a prefabricated ceramic core, and it is removed after the casting is cast. The technological process is as follows: preparation of pottery core, preparation of wax mold containing pottery core, shell making, shell dewaxing and roasting, alloy casting, and core removal. As we all know, with the development of large aircraft projects and various new engine development projects in my country, higher requirements are put forward for the shape, structure and performance of titanium alloy precision castings. [0003] At present, alumina and silica-based ceramic cores, which have been widely studied, are difficult to apply to the field of titanium alloy precision casting because the core material does not hav...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/63C04B35/04C04B35/622
Inventor 高博王伟姜银珠赵夫涛
Owner WUHU ZHEXIN NEW ENERGY