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

A method for preparing ultra-high temperature thermal insulation yb3al5o12 ceramic components

A yb3al5o12, ceramic component technology, applied in the field of ultra-high temperature heat insulation ceramics, to achieve the effect of small usage, simple process and strong machinability

Active Publication Date: 2017-11-28
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to solve complex shape high temperature heat insulation, high temperature heat sealing Yb 3 Al 5 o 12 The molding problem of elastic components, while overcoming the toxicity of the acrylamide system and the complex components and procedures that need to add various additives such as crosslinking agent, catalyst, dispersant, initiator, reducing agent, pH value regulator, etc. during the slurry preparation process, The invention provides a kind of ultra-high temperature thermal insulation Yb with complex shape which only uses a single water-soluble non-toxic additive isobutylene-maleic anhydride copolymer to realize gel injection molding at room temperature and air 3 Al 5 o 12 ceramic method

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
  • A method for preparing ultra-high temperature thermal insulation yb3al5o12 ceramic components
  • A method for preparing ultra-high temperature thermal insulation yb3al5o12 ceramic components
  • A method for preparing ultra-high temperature thermal insulation yb3al5o12 ceramic components

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A kind of preparation ultra-high temperature insulation Yb described in the present invention 3 al 5 o 12 A method for a ceramic element, comprising the steps of:

[0031] (1) Change Yb 2 o 3 and Al 2 o 3 Powder according to Yb 2 o 3 :Al 2 o 3 =3.01:5 molar ratio weighing, adding absolute ethanol, mixing with a drum mixer for 48 hours, the rotating speed is 80 / rev, and the uniformly mixed raw materials are dried at 20°C for 24 hours to obtain Yb 2 o 3 and Al 2 o 3 Mix the powder, dry the Yb after treatment 2 o 3 and Al 2 o 3 The mixed powder is placed in a molybdenum disilicide furnace, heated to 1050°C in the air, and kept for 4 hours to obtain the main phase as Yb 3 al 5 o 12 Ultra-high temperature insulation ceramic powder.

[0032] (2) take dehydrated alcohol as medium with the Yb of step (1) gained with planetary ball mill ball mill 3 al 5 o 12 The ceramic powder was ball milled for 36 hours at a speed of 200 rpm to obtain Yb with a particle...

Embodiment 2

[0037] A kind of preparation ultra-high temperature insulation Yb described in the present invention 3 al 5 o 12 A method for a ceramic element, comprising the steps of:

[0038] (1) Change Yb 2 o 3 and Al 2 o 3 Powder according to Yb 2 o 3 :Al 2 o 3 =3.02:5 molar ratio weighing, add dehydrated alcohol, mix 36 hours with a drum mixer, the rotating speed is 100 / rev, the raw material that mixes homogeneously is dried at 35 ℃ for 12 hours to obtain Yb2 o 3 and Al 2 o 3 Mix the powder, dry the Yb after treatment 2 o 3 and Al 2 o 3 The mixed powder is placed in a molybdenum disilicide furnace, heated to 1250°C in the air, and kept for 2 hours to obtain high-purity Yb 3 Al 5 o 12 Ultra-high temperature insulation ceramic powder.

[0039] (2) take absolute ethanol as the medium and use planetary ball mill ball mill to Yb 3 Al 5 o 12 The ceramic powder was ball milled for 24 hours at a speed of 300 rpm to obtain Yb with a particle size of less than 1 μm 3 Al 5 ...

Embodiment 3

[0042] A kind of preparation ultra-high temperature insulation Yb described in the present invention 3 Al 5 o 12 A method for a ceramic element, comprising the steps of:

[0043] (1) Change Yb 2 o 3 and Al 2 o 3 Powder according to Yb 2 o 3 :Al 2 o 3 =3.03:5 molar ratio weighing, adding absolute ethanol, mixing with a drum mixer for 30 hours, the rotating speed is 150 / rev, and drying the uniformly mixed raw materials at 40°C for 12 hours to obtain Yb 2 o 3 and Al 2 o 3 Mix the powder, dry the Yb after treatment 2 o 3 and Al 2 o 3 The mixed powder is placed in a molybdenum disilicide furnace, heated to 1350°C in the air, and kept for 1 hour to obtain high-purity Yb 3 Al 5 o 12 Ultra-high temperature insulation ceramic powder.

[0044] (2) take absolute ethanol as the medium and use planetary ball mill ball mill to Yb 3 Al 5 o 12 The ceramic powder was ball milled for 30 hours at a speed of 280 rpm to obtain Yb with a particle size of less than 1 μm 3 Al ...

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
shear modulusaaaaaaaaaa
particle sizeaaaaaaaaaa
bending strengthaaaaaaaaaa
Login to View More

Abstract

The invention provides a method for preparing ultra-high temperature heat-insulating Yb3Al5O12 ceramic components, which comprises the following steps: (1) raw materials are Yb2O3 and Al2O3 powder, and Yb3Al5O12 ceramic powder is obtained through high-temperature solid-state reaction; (2) Yb3Al5O12 ceramic powder, water Mix with isobutylene-maleic anhydride copolymer to form a stable Yb3Al5O12 ceramic water-based slurry; after curing and cross-linking at room temperature, obtain a Yb3Al5O12 ceramic green body; The atmosphere is Ar gas or air, and dense and complex Yb3Al5O12 ultra-high temperature heat-insulating ceramic components can be obtained. The preparation method of the Yb3Al5O12 ultra-high temperature heat-insulating ceramic element provided by the invention has a simple process, does not require high-voltage equipment, is easy to implement, and has strong practicability.

Description

technical field [0001] The invention belongs to the technical field of ultra-high temperature heat-insulating ceramics, and specifically relates to a method of preparing ultra-high-temperature heat-insulating Yb by gel injection molding with a single water-soluble non-toxic additive 3 al 5 o 12 method for ceramic components. Background technique [0002] Yb 3 al 5 o 12 Ultra-high temperature insulation ceramics have a high melting point (2000°C), moderate density (theoretical density 6.67g / cm 3 , which is similar to yttria partially stabilized zirconia (YSZ) (6.46g / cm 3 ), low thermal conductivity (theoretical minimum thermal conductivity is 1.22W / m.K, lower than the theoretical minimum thermal conductivity of YSZ is 1.49W / m.K), lower elastic modulus (282GPa) and shear modulus (114GPa) , thermal expansion coefficient close to YSZ (8.22×10 -6 / K), good high-temperature water vapor corrosion resistance and other excellent comprehensive properties, become high-temperatu...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/44
Inventor 周延春王晓飞孙新向会敏冯志海
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH