Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Alumina ceramic powder, alumina ceramic and preparation method of alumina ceramic

A technology of alumina ceramic powder and alumina ceramics, applied in the field of ceramics, can solve the problems of affecting the service life of resistors and being susceptible to force fracture.

Active Publication Date: 2016-05-18
SHENZHEN SUNTECH ADVANCED CERAMICS
View PDF1 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the alumina ceramic rods used for precision resistors are generally made of 96% alumina, but their bending strength is only about 300 MPa, and the alumina ceramic rods of this strength are easy to break under force during assembly and use. Directly affect the service life of the resistor

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Alumina ceramic powder, alumina ceramic and preparation method of alumina ceramic

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0028] Such as figure 1 Shown, the preparation method of the alumina ceramics of an embodiment, comprises the steps:

[0029] Step S110: Weigh the components according to the following mass percentages: 85% to 95% of alumina powder, 2% to 6% of titanium dioxide powder, 2.5% to 8% of magnesium oxide powder and 0.5% to 1.5% of nano Ceramic powder.

[0030] Further, the components are weighed according to the following mass percentages: 91% to 95% of alumina powder, 2% to 3.5% of titanium dioxide powder, 2.5% to 5% of magnesium oxide powder and 0.5% to 1.0% of nano Ceramic powder.

[0031] Wherein, the nano-ceramic powder is chromium oxide powder or silicon nitride powder.

[0032] Titanium dioxide powder and magnesium oxide powder are used to dope and modify alumina powder. Titanium dioxide and magnesium oxide can be distributed in the grain boundary of alumina ceramics in the form of glass phase, thus greatly enhancing the slidability between alumina grains. , so that the m...

Embodiment 1

[0046] The preparation process of the alumina ceramics of the present embodiment is as follows:

[0047] (1) Take the components according to the following mass percentages: 95% alumina powder, 2% titanium dioxide powder, 2.5% magnesium oxide powder and 0.5% nano-chromium oxide powder, wherein alumina powder, titanium dioxide powder , The particle size of the magnesium oxide powder is 0.5-1 micron, and the particle size of the nano-chromium oxide powder is 10-25 nanometers.

[0048](2) Put alumina powder, titanium dioxide powder, magnesium oxide powder and nano-chromium oxide powder into a ball mill, add ethanol, and use zirconia balls as the ball milling medium. Then ball milling and mixing at a rate of 300 rpm for 30 hours to obtain a slurry, which was dried naturally for 10 hours, and then dried in an oven at 50° C. for 12 hours to obtain a raw meal powder with a mass moisture content of 1% or less.

[0049] (3) Pass the raw meal powder obtained in step (2) through a 100-m...

Embodiment 2

[0052] The preparation process of the alumina ceramics of the present embodiment is as follows:

[0053] (1) Weigh the components according to the following mass percentages: 91% alumina powder, 3.5% titanium dioxide powder, 5% magnesium oxide powder and 0.5% nano-silicon nitride powder, wherein alumina powder, titanium dioxide powder The particle diameters of magnesium oxide powder and magnesium oxide powder are both 1-2 microns, and the particle diameters of nano-silicon nitride powder are 30-40 nanometers.

[0054] (2) Put alumina powder, titanium dioxide powder, magnesium oxide powder and nano-silicon nitride powder into a ball mill, add water as a solvent, and zirconia balls as a ball milling medium. Then ball milling and mixing at a rate of 300 rpm for 30 hours to obtain a slurry. The slurry was naturally dried for 10 hours, and then dried in an oven at 50° C. for 12 hours to obtain raw meal powder.

[0055] (3) Pass the raw meal powder obtained in step (2) through a 1...

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
Particle sizeaaaaaaaaaa
Particle sizeaaaaaaaaaa
Particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to alumina ceramic powder, alumina ceramic and a preparation method of the alumina ceramic. The alumina ceramic powder comprises components in percentage by mass as follows: 85%-95% of alumina powder, 2%-6% of titanium dioxide powder, 2.5%-8% of magnesia powder and 0.5%-1.5% of nano-ceramic powder which is chromium oxide powder or silicon nitride powder. The alumina ceramic with better bending strength can be prepared from the alumina ceramic powder.

Description

technical field [0001] The invention relates to the field of ceramics, in particular to an alumina ceramic and a preparation method thereof. Background technique [0002] At present, the alumina ceramic rods used for precision resistors are generally made of 96% alumina, but their bending strength is only about 300 MPa, and the alumina ceramic rods of this strength are easy to break under force during assembly and use. Directly affect the service life of the resistor. Contents of the invention [0003] Based on this, it is necessary to provide an alumina ceramic powder, which can prepare alumina ceramics with higher bending strength. [0004] In addition, an alumina ceramic and a preparation method thereof are also provided. [0005] An alumina ceramic powder, comprising: 85% to 95% of alumina powder, 2% to 6% of titanium dioxide powder, 2.5% to 8% of magnesium oxide powder and 0.5% to 1.5% of Nano-ceramic powder, wherein the nano-ceramic powder is chromium oxide powder...

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): C04B35/10C04B35/622C04B35/64
CPCC04B35/10C04B35/622C04B35/64C04B2235/3206C04B2235/3232C04B2235/3241C04B2235/3873C04B2235/5436C04B2235/5445C04B2235/5454C04B2235/666C04B2235/96
Inventor 向绍斌向其军谭毅成黄龙
Owner SHENZHEN SUNTECH ADVANCED CERAMICS
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com