Transparent Spinel Spherical Window Descriptions:
Transparent spinel (Magnesium aluminum transparent ceramics) has many applications in optics, electronics and structure.
Transparent spinel can be used to prepare visible to mid infrared windows and lenses. The theoretical transmittance of 3~5μm is close to 87%, which is close to ALON and sapphire, and the cutoff wavelength is slightly longer than both, especially in the mid-infrared imaging system performance.
The properties of transparent ceramic spinel and alumina are similar. It’s suitable for various circuit components such as thick film circuit, thin film circuit, integrated circuit carrier and chip packaging and other high-performance substrate materials.
Transparent Spinel Spherical Window Specifications:
|
Item
|
Unit
|
Typical Values
|
|
Molecular Formula
|
-
|
MgAl2O4
|
|
Crystal System
|
-
|
Cubic
|
|
Density
|
g/cm3
|
3.57-3.58
|
|
Physical Properties
|
|
Mohs Hardness
|
-
|
8.5
|
|
Vickers Hardness
|
N/mm2
|
>1.26 x 104
|
|
Modulus of Elasticity
|
Gpa
|
275
|
|
Flexural Strength
|
MPa
|
140-200
|
|
Compressive Strength
|
MPa
|
>500
|
|
DC Breakdown Strength
|
Kv/mm
|
34.5
|
|
Refractive Index
|
|
486.1nm
|
1.72433
|
2.2um
|
1.6848
|
|
546.1nm
|
1.71976
|
3.0um
|
1.6678
|
|
589.3nm
|
1.71611
|
4.0um
|
1.6387
|
|
The Thermodynamic Property
|
|
Melting Point
|
ºC
|
2135
|
|
Thermal Conductivity at 20℃
|
W/m•k
|
17.0
|
|
Thermal Conductivity at 100℃
|
W/m•k
|
16.4
|
|
Thermal Conductivity at 200℃
|
W/m•k
|
15.7
|
|
Thermal Conductivity at 300℃
|
W/m•k
|
14.9
|
|
Thermal Expansion Coefficient 20-300℃
|
10-6/℃
|
6.72
|
|
Thermal Expansion Coefficient 20-400℃
|
10-6/℃
|
7.07
|
|
Thermal Expansion Coefficient 20-500℃
|
10-6/℃
|
7.33
|
|
Electrical Property
|
|
Dielectric Strength
|
MV/m
|
>20
|
|
Dielectric Constant at 20℃
|
MHz
|
8.2
|
|
Dielectric Loss at 20℃
|
MHz
|
1.4x10-4
|
|
Volume Resistivity at 100℃
|
Ω•cm
|
1.2x1016
|
|
Volume Resistivity at 300℃
|
Ω•cm
|
6.3x1014
|
|
Volume Resistivity at 500℃
|
Ω•cm
|
9.4x1012
|
Transparent Spinel Spherical Window Features:
Transparent Spinel Window has the following advantages:
-no scratches under harsh conditions;
-the thickness can be reduced by more than 60% under the same protection requirements, and the weight can be effectively reduced;
-in the case of the same thickness, the protection ability can be improved.
Therefore, it can be used in various high temperature, high pressure and corrosive environment of equipment observation window, gas detector window, high temperature boiler water level gauge, high temperature and high pressure equipment observation window, commercial bar code scanner window, downhole detection sensors, low voltage and high frequency capacitors, all kinds of goggles, etc.
Transparent Spinel Spherical Window Applications:
- Spherical optical Windows, lenses, prisms
Transparent Spinel Spherical Window Packaging:
SAM’s Transparent Spinel Spherical Window is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition.
Transparent Spinel Spherical Window FAQs
Q1: What is a Transparent Spinel Spherical Window?
A transparent spinel spherical window is a curved, dome-shaped optical component made from magnesium aluminate spinel (MgAl₂O₄). Spinel is known for its exceptional optical clarity, hardness, and durability, making it suitable for demanding applications where a spherical shape is required for optical performance.
Q2: What sizes and shapes are available for Transparent Spinel Spherical Windows?
Transparent spinel spherical windows are available in various diameters and thicknesses to meet different application needs. Custom sizes and shapes can also be manufactured to meet specific requirements.
Q3: What precautions should be taken when using Transparent Spinel Spherical Windows?
Handling: Handle with care to avoid mechanical damage. Use gloves to prevent contamination.
Cleaning: Avoid abrasive cleaners and materials that could scratch the surface.
