Wear Resistance High-temperature Custom Silicon Nitride Si3N4
Ceramic Disc
The main features of the Si3N4 ceramic disc
1. The thermal expansion coefficient (3.1×10-6/℃) matches the
semiconductor silicon material (3.5-4.0×10-6/℃);
2. High thermal conductivity ( up to 70 W/m.k) of Si3N4 ceramic, 3
times that of alumina ceramic substrate;
3. The bending strength is higher than that of the alumina
substrate, which is twice that of the alumina substrate;
4. Excellent electrical performance, with extremely high insulation
resistance and low dielectric loss;
5. The compatibility of circuit materials is good, and multi-layer
wiring can be performed to achieve miniaturization of the package;
6. High thermal shock resistance, from 0 ℃ to 200 ℃ and then cool
down, repeat 10000 times;
7. Chemical resistance, resistant oxidization, acid, alkali
corrosion, service life-span up to 10 years.
The specification of the Si3N4 ceramic disc
1. We are supplying with many round ceramic wafer, square &
rectangular ceramic substrate
2. The typical thickness of the silicon nitride substrate covers
0.30mm, 0.5mm, 0.635mm, 1.0mm
3. The biggest diameter of the round ceramic wafer can be up to
400mm in 3mm, 4mm, 5mm thick
4. The max. side-length of the square and rectangular ceramic
substrate can be 400mm by 500mm
5. Surface treatment: it can be one-side, or double side polished
to be Ra0.4 or better
The description of the Si3N4 ceramic disc
Silicon nitride (Si3N4) ceramics has the characteristics of high
strength, high-temperature resistance, the best comprehensive
mechanical properties in the ceramic material, heat shock
resistance, oxidation resistance, wear resistance,
corrosion-resistant performance is good, is the first candidate for
the engine parts with ceramic material. In the mechanical industry,
silicon nitride ceramic is used as a bearing ball, roller, ball
bearing ring, working mold, new ceramic tool, pump plunger, spindle
seal material, etc.
Property Datasheet of Si3N4 Ceramic Wafers and Ceramic disc
| General | Properties | Unit | Value |
| Mechanical | Purity | % | ≥99 |
| Volume Density | g/cm3 | ≥3.22 |
| Color | | Grey |
| Compressive Strength | MPa | ≥-2500 |
| Bending Strength | MPa | 600 |
| Elastic Modulus | MPa | 300 |
| Fracture toughness | Mpam1/2 | 7 |
| Thermal | Max. service temperature (Non-loading) | ℃ | 1300 |
| Thermal Conductivity (25℃) | W/m.k | ≥70 |
| Coefficient of Thermal Expansion (CTE) | 1*10-6 m/k | 3.1 |
| Specific heat | 1 x 103J/(kg·K) | 0.5 |
| Electrical | Volume Resistivity (25℃) | ohm.cm | - |
| Insulation Breakdown | KV/mm | - |
| Dielectric constant (1Mhz) | (E) | 6 |
Our capability and strength
1.With 15 years of manufacturing experience in OEM, ODM
2. Powerful R&D, customized and mass production capability
3. In-house comprehensive manufacturing types of equipment
4. Rigorous quality control system and processes
FAQs (Frequently Asked Questions)
Q1. Are you a factory or trading company?
A: We are a direct manufacturer of technical ceramic components.
You are welcome to visit our factory.
Q2: Is it available to provide customized products?
A: We always support custom-made demand as per different materials,
dimensions, and designs.
Q3: 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.
Q4: How to ensure quality?
A: We have a complete strict quality-control system, including IQC,
IPQC, QA, OQC per ISO9001: 2008
Q5: What other products are you dealing with?
A: We also focus on a variety of metalized ceramics, high precision
zirconia ceramic parts, ceramic seals.
