Ceramic ignition needle
Alumina (aluminum oxide) ceramics offer excellent hardness, corrosion resistance and reliable electrical insulation, with stable performance under high temperatures and low wear for long service life. It is the most cost-effective engineering ceramic for wide industrial applications.
Widely used in electronic components, mechanical structural parts and wear-resistant linings. Custom machining and precision fabrication are supported to meet your specific needs.
Specification:
| Item | Outer dia. mm | Inner dia. mm | Length mm | Remark | |
|---|---|---|---|---|---|
| Alumina Ceramic Thermocouple protection tube | 7-170 | 1-110 | 3mm-1000mm | Minor customization | |
| Alumina Ceramic Insulated tube | Single hole | 2-530 | 1-500 | 3mm-5200mm | Drawing-based customization |
| Alumina Ceramic (inner core) | Double holes | 1-10 | 0.4-2 | 10mm-1000mm | Sample-based customization |
| Four-Nine holes | 1-10 | 0.5-2 | 10mm-1000mm | Full customization | |
Parameters of Alumina Ceramic
| Alumina Ceramic | Test Condition | 75-82% Al2O3 | 95% Al2O3 | 99% Al2O3 | 99.5%-99.7% Al2O3 | ||
|---|---|---|---|---|---|---|---|
| Physical properties | Density | g/cm³ | >3.0-3.2 | >3.68 | ≥3.83 | ≥3.85 | |
| Moisture absorption | % | 5-7 | 0 | 0 | 0 | ||
| ROHS Hardness | 60-70 | ≥85 | ≥89 | ≥89 | |||
| Mechanical properties | Flexural strength | Mpa | 20℃ | 150-300 | 358 | 550 | 550 |
| Compressive strength | Mpa | 20℃ | 1700 | 2068(300) | 2600(377) | 2600(377) | |
| Fracture toughness | Mpa·m3/2 | KIC | 4 | 4.3 | 5.6 | 6 | |
| Thermal properties | Maximum use temperature | ℃ | 1350 | 1380-1450 | 1600 | 1800 | |
| Thermal expansion coefficient | ×10-6/℃ | (25-1000℃) | 6.1-6.6 | 7.6 | 7.9 | 8.2 | |
| Thermal shock resistance | ℃ | Tc | very good | 250 | 200 | 200 | |
| Thermal conductivity | W/(m·K) | 20℃ | 12 | 16 | 30 | 30.4 | |
| Electrical properties | Volume resistivity | Ω·cm | 100℃ | >1013 | >1013 | >1014 | >1014 |
| Dielectric breakdown strength | KV/mm | 8.7(220) | 8.7(220) | 8.7(220) | 8.7(220) | ||
| Dielectric constant | (ε) | 1MHz, 25℃ | 9 | 9 | 9.7 | 9.7 | |
Custom sizes and tolerance available upon request
| Performance Category | Property | Unit | 96Al₂O₃ | 99.6Al₂O₃ | ZTA | AlN-170 | AlN-200 | AlN-230 |
|---|---|---|---|---|---|---|---|---|
| Basic Properties | Appearance / color | – | white | white | white | gray | light yellow | light yellow |
| Volume density | g/cm³ | 3.7 | 3.9 | 4.0 | 3.3 | 3.3 | 3.3 | |
| Surface roughness | μm | 0.2~0.75 | 0.05~0.1 | 0.2~0.75 | 0.2~0.75 | 0.2~0.75 | 0.2~0.8 | |
| Camber | length ‰ | ≤3‰ | ≤3‰ | ≤3‰ | ≤3‰ | ≤3‰ | ≤3‰ | |
| Thermal Properties | Thermal conductivity (25℃) | W/m·k | 24 | 29 | 21 | 170 | 200 | 230 |
| Thermal expansivity | ×10⁻⁶/℃ (20~400℃) | 6.2-6.8 | 6.2-7.2 | 7-8 | 4-5 | 4-5 | 4-5 | |
| ×10⁻⁶/℃ (400~800℃) | 6.5-8.2 | 6.5-8.2 | 8-9 | 5-6 | 5-6 | 5-6 | ||
| Mechanical Properties | Flexural strength | MPa | ≥350 | ≥450 | ≥700 | ≥400 | ≥350 | ≥300 |
| Electrical Properties | Dielectric constant (1MHz) | – | 9-10 | 9-10.5 | 9-10.5 | 8-9 | 8-9 | 8-9 |
| Dielectric strength | KV/mm | ≥15 | ≥15 | ≥15 | ≥15 | ≥15 | ≥15 | |
| Volume resistivity (20℃) | Ω·cm | ≥1014 | ≥1014 | ≥1014 | ≥1014 | ≥1014 | ≥1014 |
Alumina Ceramic Substrate Production Specifications
99.6% Al₂O₃
| Thickness (mm) | Maximum Size by Shape | Surface Finish | Molding Technique | ||||
|---|---|---|---|---|---|---|---|
| Rectangular (mm) | Square (mm) | Round (mm) | As Fired | Lapped | Polished | ||
| 0.1-0.2 | 50.8 | 50.8 | – | – | √ | √ | Tape Casting |
| 0.25 | 114.3 | 114.3 | – | – | √ | – | Tape Casting |
| 0.38 | 120 | 114.3 | 114.3 | – | √ | – | Tape Casting |
| 0.5 | 120 | 114.3 | 114.3 | – | √ | – | Tape Casting |
| 0.635 | 120 | 114.3 | 114.3 | – | √ | – | Tape Casting |
| * Other particular thicknesses within the thickness range of 0.1-0.635mm can be achieved by lapping. | |||||||
96% Al₂O₃
| Thickness (mm) | Maximum Size by Shape | Surface Finish | Molding Technique | ||||
|---|---|---|---|---|---|---|---|
| Rectangular (mm) | Square (mm) | Round (mm) | As Fired | Lapped | Polished | ||
| 0.25 | 120 | 114.3 | 114.3 | – | √ | – | Tape Casting |
| 0.3 | 120 | 114.3 | 114.3 | – | √ | – | Tape Casting |
| 0.38 | 140×190 | – | – | √ | – | – | Tape Casting |
| 0.5 | 140×190 | – | – | √ | – | – | Tape Casting |
| 0.635 | 140×190 | – | – | √ | – | – | Tape Casting |
| 0.76 | 130×140 | – | – | √ | – | – | Tape Casting |
| 0.8 | 130×140 | – | – | √ | – | – | Tape Casting |
| 0.89 | 130×140 | – | – | √ | – | – | Tape Casting |
| 1 | 280×240 | – | – | √ | – | – | Tape Casting |
| 1.5 | 165×210 | – | – | √ | – | – | Tape Casting |
| 2 | 500×500 | – | – | √ | – | – | Tape Casting |
| * Other particular thicknesses within the thickness range of 0.1-2.0mm can be achieved by lapping. | |||||||
Ceramic Precision Machining Center
We have built a ceramic precision machining center, equipped with centerless grinders, surface grinders, CNC machines, cylindrical grinders, internal grinders, polishing machines, lapping machines and other precision equipment, which can provide customers with one-stop comprehensive solution services.
- Lasering: drilling, scribe line, cutting
- Machining: grinding wheel cutting, fine carving, wire cutting, internal and external cylindrical grinding, surface grinding
- Surface treatment: grinding, fine grinding, polishing, which can achieve surface roughness Ra ≤ 0.05μm
| Item | Test Condition | 78-82% Al₂O₃ | 95% Al₂O₃ | 99% Al₂O₃ | 99.5% Al₂O₃ |
|---|---|---|---|---|---|
| Physical properties | Density (g/cm³) | >2.9 | >3.6 | 3.89 | 3.96 |
| Moisture absorption (%) | 5-7 | 0 | 0 | 0 | |
| Mechanical properties | ROHS Hardness | 60-70 | ≥85 | ≥89 | ≥89 |
| Flexural strength (psi×10³) 20℃ |
– | 358 | 550 | 550 | |
| Compressive strength (psi×10³) 20℃ |
– | 2068(300) | 2600(377) | 2600(377) | |
| Fracture toughness K(Ic) MPa·m³/² |
– | 4.3 | 5.6 | 6 | |
| Thermal properties | Maximum use temperature (℃) | 1350 | 1450 | 1600 | 1650 |
| Thermal expansion coefficient 1×10⁻⁶/℃, 25-1000℃ |
6.1-6.6 | 7.6 | 7.9 | 8.2 | |
| Thermal shock resistance Tc (℃) | very good | 250 | 200 | 200 | |
| Thermal conductivity W/(m·K), 20℃ |
– | 16 | 30 | 30.4 | |
| Electrical properties | Volume resistivity Ω/cm², 100℃ |
>1013 | >1013 | >1014 | >1014 |
| Dielectric breakdown strength (kV/mm) | 8.7(220) | 8.7(220) | 8.7(220) | 8.7(220) | |
| Dielectric constant (ε) 1MHz, 25℃ |
9 | 9 | 9.7 | 9.7 | |
| Dielectric constant (100MHz) | 9.5 | ||||
Conical Crucible
| Top Dia. (mm) | Base Dia. (mm) | Height (mm) | Wall Thickness(mm) | Content (ml) |
|---|---|---|---|---|
| 25 | 18 | 22 | 1.3 | 5 |
| 28 | 20 | 27 | 1.5 | 10 |
| 32 | 21 | 35 | 1.5 | 15 |
| 35 | 18 | 35 | 1.7 | 20 |
| 36 | 22 | 42 | 2 | 25 |
| 39 | 24 | 49 | 2 | 30 |
| 52 | 32 | 50 | 2.5 | 50 |
| 61 | 36 | 54 | 2.5 | 100 |
| 68 | 42 | 80 | 2.5 | 150 |
| 83 | 48 | 86 | 2.5 | 200 |
| 83 | 52 | 106 | 2.5 | 300 |
| 86 | 49 | 135 | 2.5 | 400 |
| 100 | 60 | 118 | 3 | 500 |
| 88 | 54 | 145 | 3 | 600 |
| 112 | 70 | 132 | 3 | 750 |
| 120 | 75 | 143 | 3.5 | 1000 |
| 140 | 90 | 170 | 4 | 1500 |
| 150 | 93 | 200 | 4 | 2000 |
Cylindrical Crucible
| Diameter (mm) | Height (mm) | Wall Thickness (mm) | Content (ml) |
|---|---|---|---|
| 15 | 50 | 1.5 | 5 |
| 17 | 21 | 1.75 | 3.4 |
| 17 | 37 | 1 | 5.4 |
| 20 | 30 | 2 | 6 |
| 22 | 36 | 1.5 | 10.2 |
| 26 | 82 | 3 | 34 |
| 30 | 30 | 2 | 15 |
| 35 | 35 | 2 | 25 |
| 40 | 40 | 2.5 | 35 |
| 50 | 50 | 2.5 | 75 |
| 60 | 60 | 3 | 130 |
| 65 | 65 | 3 | 170 |
| 70 | 70 | 3 | 215 |
| 80 | 80 | 3 | 330 |
| 85 | 85 | 3 | 400 |
| 90 | 90 | 3 | 480 |
| 100 | 100 | 3.5 | 650 |
| 110 | 110 | 3.5 | 880 |
| 120 | 120 | 4 | 1140 |
| 130 | 130 | 4 | 1450 |
| 140 | 140 | 4 | 1850 |
| 150 | 150 | 4.5 | 2250 |
| 160 | 160 | 4.5 | 2250 |
| 170 | 170 | 4.5 | 3350 |
| 180 | 180 | 4.5 | 4000 |
| 200 | 200 | 5 | 5500 |
| 220 | 220 | 5 | 7400 |
| 240 | 240 | 5 | 9700 |
Rectangled Crucible
| Length (mm) | Width (mm) | Height (mm) | Length (mm) | Width (mm) | Height (mm) |
|---|---|---|---|---|---|
| 30 | 20 | 16 | 100 | 60 | 30 |
| 50 | 20 | 20 | 100 | 100 | 30 |
| 50 | 40 | 20 | 100 | 100 | 50 |
| 60 | 30 | 15 | 110 | 80 | 40 |
| 75 | 52 | 50 | 110 | 110 | 35 |
| 75 | 75 | 15 | 110 | 80 | 40 |
| 75 | 75 | 30 | 120 | 75 | 40 |
| 75 | 75 | 45 | 120 | 120 | 30 |
| 80 | 80 | 40 | 120 | 120 | 50 |
| 85 | 65 | 30 | 140 | 140 | 40 |
| 90 | 60 | 35 | 150 | 150 | 50 |
| 100 | 20 | 15 | 200 | 100 | 25 |
| 100 | 20 | 20 | 200 | 100 | 50 |
| 100 | 30 | 25 | 200 | 150 | 5 |
| 100 | 40 | 20 | – | – | – |
| Technical Index | G99 | G98 | G97 | G96 | A96 | A95 | H95 | S97 |
|---|---|---|---|---|---|---|---|---|
| Water Absorption | 2-4 | 3-5 | 4-6 | 4.5-6.5 | 4.5-7.5 | 5-8 | 5.5-7.5 | 8-10 |
| Bending Strength (MPa, Room Temp) | 70-90 | 65-78 | 60-75 | ≥60 | 60-70 | 55-70 | 65-70 | 45-55 |
| Bending Strength (1350℃) | 68-90 | 65-85 | 55-75 | 45-65 | 55-75 | – | – | – |
| Bending Strength (1300℃) | – | – | – | – | – | 55-75 | 50-70 | – |
| Bulk Density | 3-3.2 | 2.9-3.1 | 2.7-2.9 | 2.6-2.8 | 2.6-2.8 | 2.5-2.7 | 2.65-2.85 | 2.5-2.6 |
| Coefficient of Thermal Expansion (×10⁻⁶/℃, 25-1000℃) | 6.0-6.4 | 6.0-6.4 | 6.0-6.4 | ≤6.4 | 6.0-6.5 | 6.0-6.5 | 6.0-6.5 | 4.25-4.45 |
| Thermal Shock Resistance | Good | Very Good | Very Good | Very Good | Very Good | Very Good | Very Good | – |
| Maximum Operating Temperature (℃) | 1400 | 1400 | 1350 | 1300 | 1300 | 1300 | 1300 | 1100 |
| Alumina Content (%) | 79-81 | 78-79 | 77-78 | 75-77 | 74-75 | 73-74 | 77-78 | ≈18 |
| Silicon Carbide Content (%) | – | – | – | – | – | – | – | ≈45 |
| Refractoriness (℃) | 1300-1400 | |||||||
| Specification | Diameter: 21-70mm Length: ≤5200mm | |||||||
| Item | Test Condition | Unit Symbol | 95% Alumina Ceramics | 99% Alumina Ceramics | 99.7% Alumina Ceramics |
|---|---|---|---|---|---|
| Flexural strength | 20°C | MPa (psi×10³) | 358(52) | 550 | 550 |
| Compressive Strength | 20°C | MPa (psi×10³) | 2068(300) | 2600(377) | 2600(377) |
| Fracture Toughness | K(Ic) | MPa·m1/2 | 4.5 | 5.6 | 6 |
| Coefficient of thermal expansion | 25-1000°C | 1×10⁻⁶/°C | 7.6 | 7.9 | 8.2 |
| Coefficient of thermal conductivity | 20°C | W/(m·K) | 16 | 30 | 30.4 |
| Thermal Shock Resistance | Tc | °C | 250 | 200 | 200 |
| Dielectric constant | 1MHz, 25°C | / | 9 | 9.7 | 9.7 |
| Dielectric strength | / | AC kV/mm (AC V/mil) | 8.3(210) | 8.7(220) | 8.7(220) |
| Volume Resistivity | 100°C | Ω·cm | >1013 | >1014 | >1014 |
High Density Alumina: The high density of 3.6-3.9g/cm³ ensures robust and durable performance, making it suitable for long-term use in demanding applications.
Frictional Times: With a frictional times range of 300,000 to 500,000, the ceramic disc offers extended operational life, reducing the need for frequent replacements. Available diameter range: 25mm-210mm.
Standard Diameter (mm): 11.5, 12.0, 13.5, 14.5, 15, 15.5, 15.7, 15.8, 16, 16.1, 16.2, 19, 20.7, 21, 25, 35, 40
Product Introduction
- The ceramic hole is completely sealed between the bracket and the ceramic.
- The natural structure inside the ceramic body forms a resistance effect, which can eliminate the electromagnetic waves generated by the pulse igniter.
- Adopting KANTHAL / APMz as electrode material for longer service life.
| Product Name | Electrode Plug Type Ignition Electrodes |
| Electrode Wire Material | Ni80Cr20, Cr27Al7Mo2, 0Cr25Al5, temperature resistance 1200-1350℃. KANTHAL, KANTHAL D, APM high temperature resistant electric heating wire are also available. |
| Electrode Wire Diameter | 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 5mm |
| Features | Sensitive ignition, convenient disassembly and assembly, firm and reliable |
Production & Delivery
Production Capacity: Flexible production capacity for both standard and customized Advanced Ceramic components
Typical Lead Time: Sampling 7–12 days | Mass production 15–45 days, depending on product specifications and order volume
Shipping: FOB / EXW / CIF options available via sea, air, or express
Packaging: Export-standard protective packaging designed for safe international transportation
From technical drawings and samples to customized specifications, our engineering and production teams support customers throughout the process — from prototype development to stable mass production.
