Glazed Alumina Ceramic Electric Insulation Parts
Product Description
The description of alumina ceramic parts
Alumina (al2o3) has an extensive application due to its versatility and low cost of material than other advanced ceramics. Alumina offers high electrical insulation resistance, high-temperature resistance, strong hardness, wear resistance, and good chemical stability, making it a good material to withstand high temperatures and chemical corrosion.
Our factory produces a selection of purity of alumina from 75% to 99.8%, all of the ceramic parts we supply have a dense body via dry pressing, hot pressing, ceramic injection molding, and ISO pressing. To achieve some special application for fitting, reducing friction, and increasing insulation, we provide a series of secondary processes after sintering, covering CNC machining, polishing, glazing, and metalizing.
We manufacture a wide range of alumina ceramic rings, including ceramic tubes, ceramic rings, ceramic discs, ceramic rods, ceramic arms, and ceramic wire guides. Whether, it's a prototyping case, or high-volume demand, we believe we can provide you with a desirable solution.
The specification of technical ceramic parts
| Option Materials |
alumina, zirconia, silicon carbide, silicon nitride, steatite optional |
| Outer diameter |
0.5 ~800 mm |
| Length |
1~1000mm |
| Roughness |
To be Ra0.05 |
| Surface treatment |
Polished, Glazed, Metalized availability |
| Cosmetic |
Smooth surface without contamination, deformation, and crack |
The accuracy achieved after precision machining
(1) Axis: roundness 0.002 mm, concentricity 0.002 mm, smoothness Ra0.1;
(2) Hole: the minimum processing hole diameter is 0.2 mm and the depth is up to 6 mm (depending on the material);
(3) Plane: 0.1mm sheet with minimum processable thickness, parallelism 0.001mm, dimensional tolerance 0.001 mm, finish Ra0.1;
(4) Slot: min. value to be 0.1 mm of narrow groove, and grooves with custom shapes;
(5) Thread: The minimum machinable M2 internal thread, the accuracy of GB-7h, the external thread size is not limited, the accuracy is GB-6g.
Typical Applications
Application of alumina ceramic parts:
Remark:
Alumina ceramic parts are widely used in the electronic, electrical, machinery, chemistry, ceramic seals, minerals, new energy, aerospace, and almost all modern industries.
Products category
Product Parameters
Datasheet of technical ceramic materials
| Property |
Units |
Materials |
| 99.5%Al2O3 |
99%Al2O3 |
95%Al2O3 |
ZrO2 |
Si3N4 |
| Density |
g/cm3 |
≥3.85 |
≥3.80 |
≥3.60 |
≥6.0 |
≥3.2 |
| Water absorption |
% |
0 |
0 |
0 |
0 |
0 |
| Hardness |
HV |
1700 |
1700 |
1500 |
1300 |
1550 |
| Flexural strength |
Mpa |
≥379 |
≥338 |
≥320 |
≥1200 |
≥600 |
| Compressive strength |
Mpa |
≥2240 |
≥2240 |
≥2000 |
≥1990 |
≥2500 |
| Fracture toughness |
Mpa m1/2 |
4-5 |
4-5 |
3-4 |
6.5-8 |
6 |
Max. service temperature
(Non-loading) |
ºC |
1675 |
1600 |
1500 |
1000 |
1200 |
| CTE (20-800ºC) |
1×10 -6 /ºC |
6.5~8.0 |
6.2~8.0 |
5.0~8.0 |
8.0~9.5 |
3.1 |
| Thermal shock |
T(ºC) |
≥250 |
≥200 |
≥220 |
≥300 |
≤1000 |
| Thermal conductivity(25ºC) |
W/m.k |
30 |
29 |
24 |
3 |
15~20 |
| Volume resistivity (25ºC ) |
ohm.cm |
>1 x 10 14 |
>1 x 10 14 |
>1 x 10 14 |
>1 x 10 11 |
>1 x 10 12 |
| Insulation strength |
KV/mm |
19 |
18 |
18 |
17 |
|
| Dielectric constant(1Mhz) |
(E) |
9.7 |
9.5 |
9.5 |
29 |
|
Why choose us?
With our comprehensive manufacturing & inspection equipment and veteran engineering & production team, it helps us to produce very high-quality and competitive technical ceramic parts, every piece of ceramic parts could reach our clients' rigorous requirements.
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FAQ
Q1. Are you a factory or trading company?
A: We are a manufacturer. You are welcome to visit our factory.
Q2: Do you send a sample to check?
A: Sure, the sample is free and freight collect.
Q3: When will you ship it?
A: If the products are in storage, we'll ship within 48 hours
Q4: When can I get the price?
A: We regularly quote within 24 hours after we get your inquiry. If you are in urgent need of getting the price.
Please call us or tell us in your email so that we will proceed with your inquiry as a priority.
Q5: Is it available to provide customized products?
A: We always support custom-made demand as per different materials, dimensions, and designs.
Q6: How to ensure quality?
A: The dimension out of any batch will be carried out sampling inspection per international AQL standard.
A 100% cosmetic inspection will be done.
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