Steatite materials
MgSiO₃ Enstatite
Backed by 33 years of expertise in material technology R&D and application, Kangrong High-Tech has mastered the core technologies of advanced ceramics. With robust customized development capabilities, we continuously provide clients with professional advanced ceramic application solutions and comprehensive supporting services.
item | test condition | unit | porcelain | steatite | 75% alumina | 85% alumina | mullite porcelain | cordierite porcelain | corundum | 95% alumina | 96% alumina | carborundum | zirconia |
| chemical composition | % | Al2O3-SiO2-R2O | MgO-SiO2 | Al2O3-SiO2 | Al2O3-SiO2 | Al2O3-SiO2 | MgO-Al2O3-SiO2 | Al2O3 | Al2O3 | Al2O3 | SiC | ZrO2 | |
| density | g/cm3 | 2.0~2.2 | 2.7 | 3.2 | 3.4 | 2.6~2.8 | 1.8~2.4 | 2.2~2.4 | 3.6 | 3.7 | 2.8 | 6 | |
| water absorption | % | 0.5 | 0 | 0 | 0 | 0~1 | 0~15 | 5~15 | 0 | 0 | 5~15 | 0 | |
| hardness | HRA | 60~70 | 80 | 70~80 | 90 | 90 | 90 | 92 | 88 | ||||
| bend strength | Mpa | 50~80 | 110 | 200 | 220 | 70~120 | 20~50 | 250 | 300 | 350~500 | 800 | ||
| coefficient of liner thermal expansion | 25~800℃ | ×10-6℃ | 6.5~7.5 | 5.5 | 5~8 | 4~4.5 | 1~2.5 | 9.6 | 9.6 | 4.3 | 10 | ||
| thermal conductance | W/m·K | 4~6 | 2~6 | 5~15 | 20-25 | 17 | 1~3 | 10~20 | 25 | 25 | 35~55 | 2.93 | |
| dielectric constant | 1MHz/20℃ | 7.5 | 8 | 8 | 6.4~7.3 | 9.4 | 9.4 | ||||||
| dielectric loss | 1MHz/20℃ | tgδ/×10-4 | 3~8 | 3 | 0.5 | 80~90 | 2 | 2 | |||||
| volume resistivity | 20℃ | Ω•cm | 1011 | 1011 | 1013 | 105~106 | 1014 | 1014 | 100~2 | 1013 | |||
| breakdown strength | KV/mm | 0.5~3 | 8~15 | 5~25 | 10 | 10~20 | 5~9 | 15~35 | 15~35 | ||||
| heat shock resistance | △T | 300 | 250 | 400 | 500 | 800 | 600 | 600 | 350 | 250 | |||
| MPa·m3/2 | 1.8 | 1.4 | 3~4.5 | 3~4.5 | 4~5 | 5~10 | |||||||
| fracture toughness |
| Standard Tolerances for Dry Pressure | ||
| Length and Width | mm | +- 1% |
| Thickness | mm | +- 10% |
| Pore size | < 2mm | < 2mm |
| 2 - 10 mm | +- 0.15 | |
| > 10 mm | +- 1% | |
| Radius and Angle | mm | 0.3 |
| Standardtoleranzen bei der Bearbeitung | ||
| Dicke | mm | +- 0.05 |
| Parallelism | mm | < 0.05 |
| Flatness | mm | <0.0006 |
| Roughness | mm | 0.15 +- 0.1 |
(1) Advanced Ceramics – The Key Material Shaping the Future
As cutting-edge materials with immense innovative value, advanced ceramics break through the boundaries of traditional materials with their unique and customizable physicochemical properties. They empower core high-tech industries and serve as a crucial driving force for technological innovation and industrial upgrading. From lighting and home appliances to new energy, 5G communications, and the electronics industry, advanced ceramics act as core components in high-end products across various fields with their tailored performance, laying a solid foundation for high performance and high-reliability operation.
(2) Application Fields of Materials
| Field | Performance | Application areas |
| Household appliance industry | Excellent electrical insulation properties, high-temperature stability, and mechanical strength | Inside home appliances such as air conditioners, refrigerators, washing machines, and water heaters, core functions—including insulation, heat resistance, wear resistance, and sensing—ensure safe operation, energy efficiency, durability, and precise temperature control. |
| Lighting industry | Insulation Properties, High-Temperature Stability, Mechanical Strength | Ceramic lamp holders, ceramic LED modules, and spotlights are suitable for a wide range of lighting applications and ensure the system’s long-term safe and stable operation. |
| New energy industry | High insulation performance, high-temperature resistance, thermal shock resistance, chemical inertness | Ceramic housings for high-voltage DC relays in new energy vehicles, ceramic probes for oxygen sensors, and key ceramic components for photovoltaic systems ensure the stability and durability of energy systems under extreme operating conditions. |
| 5G communication industry | Low dielectric loss, high thermal conductivity, and precise frequency stability | GNSS/WLAN/RFID ceramic positioning antennas (including high-precision multilayer antennas) provide high-speed, stable signal transmission for communication devices and are suitable for a wide range of scenarios. |
| Electronics industry | High hardness, excellent heat resistance, stable electrical properties, and precise dimensional accuracy | Precision resistor substrates—such as ceramic housings, ceramic tubes, and ceramic rods—provide a reliable foundation for high-precision, high-stability electronic components. |
We collaborate deeply with our clients, leveraging the comprehensive performance spectrum of advanced ceramics (such as ultra-high insulation, tunable conductivity, extreme temperature resistance, and exceptional wear resistance) to co-develop high-performance products and system solutions. This empowers our clients to overcome technical challenges and strengthen their market competitiveness. Kangrong drives industrial iteration through material innovation, striving to become a leader and benchmark enterprise in the field of advanced ceramics!
| No. | Performance Type | Advanced Ceramics | Metal | Polymers (plastic resins, rubber, fibers) | Professional Evaluation Guidelines | Key Comparison Notes |
| 1 | Hardness | Excellent (+) | Poor (-) | Poor (-) | With a Vickers hardness of 1,500–2,500 HV, it far exceeds that of metals (steel: 200–800 HV) and polymers, and exhibits outstanding resistance to high loads. | With a hardness 3–12 times that of metals and 10–20 times that of polymers, it is suitable for applications involving severe friction and high-pressure loads. |
| 2 | Abrasion Resistance | Excellent (+) | Poor (-) | Poor (-) | With a coefficient of friction of 0.1–0.3, it offers wear resistance 5–10 times that of metals and 10–20 times that of polymers, and maintains its structural integrity over the long term. | Its wear resistance far exceeds that of both, significantly extending the service life of the components. |
| 3 | Dimensional Stability | Excellent (+) | Poor (-) | Poor (-) | Thermal expansion coefficient: 1–6 × 10⁻⁶/°C; deformation < 0.01% over the temperature range of –200°C to 1,000°C; excellent accuracy retention. | Its stability far exceeds that of metals and polymers, ensuring the reliability of high-precision products under operating conditions. |
| 4 | Density/Weight | Excellent (+) | Poor (-) | Excellent (+) | With a density of 2.5–4.5 g/cm³, which is only 30%–58% of that of steel (7.8 g/cm³), it offers significant weight-saving benefits. | Its lightweight design offers advantages comparable to those of polymers and significantly outperforms metals, thereby reducing the load on equipment. |
| 5 | Heat Dissipation Performance | Excellent (+) | Average (o) | Poor (-) | Alumina/aluminum nitride ceramics have a thermal conductivity of 150–230 W/(m·K), which far exceeds that of polymers (<1 W/(m·K)) and is comparable to that of some metals. | It offers excellent thermal performance, making it suitable for thermal management of electronic components; it outperforms polymers and is comparable to some metals. |
| 6 | High-Temperature Resistance | Excellent (+) | Average (o) | Poor (-) | Long-term operating temperature: 800–1,600 °C; high-temperature strength retention rate > 80%; the metal softens above 600 °C, and the polymer decomposes above 200 °C. | Its maximum temperature resistance far exceeds that of both, making it suitable for demanding environments such as high-temperature furnaces and spacecraft. |
| 7 | Insulation Properties | Excellent (+) | Poor (-) | Average (o) | Dielectric strength: 10–20 kV/mm; volume resistivity: >10¹⁴ Ω·cm; selective conductivity can be achieved in certain components. | It offers insulation properties far superior to those of metals and greater stability than polymers, making it suitable for high-voltage and precision electronics applications. |
| 8 | High-Voltage Resistance | Excellent (+) | Average (o) | Poor (-) | Thanks to its excellent insulation properties, it can withstand extreme voltage surges of 10–50 kV without any loss of performance. | It has outstanding high-voltage resistance; metals are prone to breakdown and polymers are prone to aging, making it difficult to find a suitable substitute. |
| 9 | Chemical Resistance | Excellent (+) | Poor (-) | Poor (-) | Highly chemically inert, with a corrosion rate of <0.001 mm/year; resistant to strong acids, strong alkalis, etching agents, and oxidative corrosion. | Its corrosion resistance far exceeds that of metals prone to rust and polymers prone to degradation, making it suitable for chemical and semiconductor applications. |
| 10 | Biocompatibility | Excellent (+) | Poor (-) | Average (o) | Alumina/zirconia materials comply with the ISO 10993 standard, are non-cytotoxic, and have a smooth surface that inhibits bacterial adhesion. | Suitable for medical implants; superior to metals that can easily trigger an immune response and biodegradable polymers. |
