Ceramic-nano alumina can be used in
functional ceramics, structural ceramics, transparent ceramics, textile
machinery.
|
Model
|
DK-Al2O3-30
|
|
Molecular
formula
|
Al2O3
|
|
Exterior
|
White
powder
|
|
Crystal
form
|
α phase
|
|
Average
particle size
|
30-50nm
|
|
Specific
surface area
|
10-30
m2/g
|
|
Al2O3
content
|
99.99%
|
|
Surface
treatment
|
无
|
|
Burning
loss%
|
＜0.5
|
use:
1. Due to the superplasticity of
nano-alumina powder, it solves the shortcomings of the application range
limited by low-temperature brittleness. Among them, nano-aluminum oxy-carbide
(SiC) nanocomposites are the most prominent, and their flexural strength is
from The single-phase alumina ceramics increased from 300-400 MPa to 1 GPa, and
the fracture toughness of the material increased by more than 40%.
2. Thermal stability: The addition of
nano-alumina to the ceramic substrate not only improves the sintering
performance of the substrate, but also greatly improves the thermal stability
of the alumina substrate material, and the thermal stability is improved by 2-3
times.
3. Density: In the process of powder
extrusion molding, nano-α-Al2O3 powder can be filled into the pores of micron
alumina powder, which reduces the pore size; the molding pressure is increased,
and the number of pores can be reduced, thereby improving The density of
ceramic embryos improves the density and mechanical properties of alumina
ceramics after sintering.
4. Reduction of sintering temperature:
the addition of nano-a-Al2O3 promotes the sintering activity and helps to
reduce the sintering temperature. When the sintering temperature is 1450 °C,
the flexural strength and fracture toughness reach the maximum.
5. The addition of a small amount of
nano-a-Al2O3 can effectively improve the mechanical properties of the material.
The alumina ceramic is sintered at 1450 °C. When the addition amount is 10%,
the flexural strength is 415 mPa and the fracture toughness is 4.1 MPa·m^1. /2.
|
