Unlock instant, AI-driven research and patent intelligence for your innovation.

Ceramic core for casting yttria monocrystal and preparation method

A technology of ceramic core and yttrium oxide, which is used in casting molding equipment, casting mold, core and other directions, can solve the problems of single crystal casting that cannot meet the requirements of 1600-1650 ℃, and achieve the effect of expanding the scope of use

Inactive Publication Date: 2018-06-19
辽宁法库陶瓷工程技术研究中心
View PDF6 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use temperature of the existing equiaxed crystal casting and directional casting ceramic core is only 1500°C-1550°C, which is far from meeting the requirements of single crystal casting at 1600-1650°C

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Take 80% of yttrium oxide, 7.75% of aluminum oxide, and 1% of zirconia fiber, pass through a 325-mesh standard sieve respectively, take the part under the sieve and mix with 0.6% of stearic acid and 0.7% of oleic acid, and heat at 105°C for 2 hours after mixing. , get 9.5% of paraffin wax, 0.2% of beeswax, and 0.25% of polyethylene, mix uniformly at 120°C, pass through a 325-mesh standard sieve to make a plasticizer for subsequent use. Raise the temperature of the mixer to 130°C, add the prepared plasticizer, then add the above-mentioned mixed powder while stirring, continue stirring for 12 hours after adding all the powder, pour it out and cool it to make an ingot.

Embodiment 2

[0011] Take 70.05% of yttrium oxide, 11.5% of aluminum oxide, and 2% of zirconia fiber, pass through a 325-mesh standard sieve respectively, take the under-sieve part and mix with 0.7% of stearic acid and 0.7% of oleic acid, and heat at 105°C for 2 hours after mixing. , get 14.5% of paraffin wax, 0.2% of beeswax, and 0.35% of polyethylene, mix uniformly at 120°C, pass through a 325-mesh standard sieve to make a plasticizer for subsequent use. Raise the temperature of the mixer to 130°C, add the prepared plasticizer, then add the above-mentioned mixed powder while stirring, continue stirring for 12 hours after adding all the powder, pour it out and cool it to make an ingot.

Embodiment 3

[0013] Take 75.9% of yttrium oxide, 10% of aluminum oxide, and 3% of zirconia fiber, pass through a 325-mesh standard sieve respectively, take the under-sieve part and mix with 0.3% of stearic acid and 0.5% of oleic acid, and heat at 105°C for 2 hours after mixing. , get 10% of paraffin wax, 0.25% of beeswax, and 0.05% of polyethylene, mix uniformly at 120°C, pass through a 325-mesh standard sieve to make a plasticizer for subsequent use. Raise the temperature of the mixer to 130°C, add the prepared plasticizer, then add the above-mentioned mixed powder while stirring, continue stirring for 12 hours after adding all the powder, pour it out and cool it to make an ingot.

[0014] The above-mentioned material ingot is made into ceramic core green bodies of several shapes according to the mold with a ceramic core forming machine. The green body is fired at 1210-1400°C to make a ceramic core.

[0015] The ceramic core prepared by the invention has the following properties: flexura...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Bending strengthaaaaaaaaaa
Maximum operating temperatureaaaaaaaaaa
Login to View More

Abstract

The invention provides a ceramic core for casting an yttria monocrystal and a preparation method. The ceramic core is prepared from raw materials in a weight ratio through batching, sieving, mixing, heating, stirring, cooling, molding and roasting, and the raw materials comprise components as follows: 70%-80% of yttria, 7.5%-11.5% of alumina, 1%-3% of zirconia fiber, 9.5%-14.5% of paraffin, 0.1%-0.2% of beewax, 0.25%-0.35% of polyethylene, 0.4%-0.7% of oleic acid and 0.5%-0.7% of stearic acid. The method is suitable for continuously producing the ceramic core in a complicated shape with an injection molding technology, the highest working temperature of the prepared ceramic core can reach 1700 DEG C, the operating requirement of monocrystal casting for the ceramic core is completely met, and the use range of the ceramic core is expanded.

Description

technical field [0001] The invention relates to a ceramic core that can be used for single crystal casting, and is mainly used in the technical field of precision casting. Background technique [0002] The ceramic core is used as an adapter to form the hollow inner cavity structure of the precision casting. Its function is to form the inner cavity shape of the precision casting and ensure the dimensional accuracy of the wall thickness of the precision casting together with the external mold and the mold shell. After the casting is complete, the ceramic core is removed from the casting by mechanical or chemical erosion. With the development of investment casting technology from equiaxed crystal casting, directional casting to single crystal casting, the pouring temperature is continuously increasing, which puts forward higher requirements for the performance of the core. The operating temperature of the equiaxed crystal casting and directional casting ceramic cores in the pr...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C04B35/66C04B35/505C04B35/622C04B35/632C04B35/634B22C9/10
CPCB22C9/10C04B35/505C04B35/622C04B35/632C04B35/63408C04B35/63496C04B35/66C04B2235/3217C04B2235/5236C04B2235/6022C04B2235/96C04B2235/9607
Inventor 吴学坤许壮志薛健张明初小葵
Owner 辽宁法库陶瓷工程技术研究中心
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com