Silisyum Karbür (SiC) Seramikler

Known since the late 19th century as carborundum silicon carbide ceramics (SiC), this compound of silicon and carbon has evolved from abrasive powders into a cornerstone material for high-performance engineering. Today, silicon carbide ceramics are indispensable in industries ranging from semiconductors and electronics to aerospace, automotive, energy, and chemical processing.

What is silicon carbide? In scientific terms, it is a covalently bonded silicon carbide compound with the chemical formula SiC, exhibiting a unique crystalline structure that can exist in different polytypes (3C, 4H, 6H). Its high hardness (Mohs 9.5), low density (~3.1 g/cm³), high melting temperature (~2,700 °C), and excellent silicon carbide thermal conductivity make it ideal for demanding applications where metals or plastics fail.

At Great Ceramic, we provide engineered silicon carbide parts tailored to customer requirements, offering unmatched precision, consistency, and reliability.

Şuraya atla

Avantajlar | Uygulamalar | Malzeme Sınıfları | Özellikler | Vakalar | Talaşlı İmalat | SSS | İlgili

Silisyum Karbür Seramik-SIC-Seramik Malzemeler-Büyük Seramik

Advantages of Silicon Carbide Ceramics

The unique combination of mechanical, thermal, and electrical properties makes SiC stand out among technical ceramics.

With a Vickers hardness of around 22 GPa, silicon carbide hardness approaches that of diamond and cubic boron nitride. This makes SiC an ideal choice for wear-resistant parts, seal rings, and abrasives.

With silicon carbide density typically between 3.02–3.15 g/cm³, it offers exceptional strength without excessive weight—an important advantage in aerospace and automotive systems.

SiC thermal conductivity exceeds 100 W/m·K, making it an excellent material for heat exchangers, semiconductor wafers, and power electronics substrates.

A coefficient of thermal expansion (SiC CTE) of ~4 × 10⁻⁶/K ensures excellent dimensional stability, even under thermal shock and fluctuating temperatures.

Resistant to acids, salts, and most chemicals, while forming a protective SiO₂ film above 1,300 °C to resist oxidation.

The electrical properties of silicon carbide allow it to be used as a wide-bandgap semiconductor, ideal for high-power, high-temperature electronic devices.

Its combination of hardness, strength, and corrosion resistance means silicon carbide products significantly outperform metals and polymers in harsh environments.

Endüstri Uygulamaları

Silicon carbide usage spans numerous industries thanks to its exceptional properties:

In aerospace, silicon carbide applications include turbine components, engine parts, and thermal protection systems. Its high-temperature capability and lightweight nature make it ideal for these demanding environments. Silicon carbide ceramics are also used in armor protection systems for vehicles and personnel due to their exceptional hardness and lightweight properties.

The semiconductor properties of SiC have revolutionized power electronics. Silicon carbide technology enables more efficient power conversion, higher frequency operation, and better thermal management compared to traditional silicon semiconductors. This makes it valuable for inverters, converters, and power supplies in energy applications.

In industrial settings, silicon carbide products such as nozzles, seals, bearings, and cutting tools provide exceptional wear resistance and longevity. The material's hardness and chemical inertness make it ideal for these demanding applications.

The automotive industry utilizes SiC for brake disks, clutch components, and ceramic filters. In electric vehicles, silicon carbide semiconductors are crucial for power control systems, improving efficiency and reducing heat generation.

In semiconductor manufacturing, silicon carbide ceramics are used for wafer processing fixtures, susceptors, and plasma-resistant components. The material's purity, thermal stability, and plasma resistance make it ideal for these critical applications.

Silicon carbide tubes, heat exchangers, and reaction chambers provide exceptional corrosion resistance in chemical processing environments. The material withstands aggressive acids, alkalis, and high temperatures where metals would rapidly degrade.

SiC's radiation resistance and stability at high temperatures make it suitable for nuclear applications, including fuel cladding and structural components in advanced reactor designs.

Otomotivde İleri Seramik Uygulamaları
Endüstriyel Makinelerde İleri Seramik Uygulamaları
Genel Üretimde İleri Seramik Uygulamaları
Kimya, Plastik ve Kauçuk Sektörlerinde İleri Seramik Uygulamaları
Havacılık ve uzay için gelişmiş seramik bileşenler
Yarı İletken ve Elektronik Sektöründe İleri Seramik Uygulamaları
tibbi̇ ci̇hazlarda kullanilan tekni̇k serami̇kler
Petrol ve Gaz Endüstrisinde İleri Seramik Uygulamaları

Available grades of silicon carbide materials

Great Ceramic provides a range of high-performance silicon carbide materials optimized per application:

Pressureless Sintered Silicon Carbide Ceramics（SSIC）

Pressureless sintered silicon carbide ceramics (SSiC) are high-performance structural ceramics produced through a high-temperature, pressureless sintering process. Their primary component is high-purity silicon carbide powder. No metallic binder or external pressure is required during the sintering process, resulting in extremely high purity and density, resulting in excellent overall performance. This material is widely used in extremely harsh environments due to its exceptional mechanical strength, wear resistance, and corrosion resistance.

Temel Özellikler

  • Ultra-High Hardness and Wear Resistance
  • With a Mohs hardness approaching 9.5, second only to diamond and cubic boron nitride, SSiC exhibits exceptional wear resistance, making it ideal for use in high-friction and high-wear environments.
  • Excellent Mechanical Strength: It possesses high flexural and compressive strengths, maintaining stable mechanical properties even at high temperatures.
  • High-Temperature Resistance: It can withstand long-term stable operation in air environments exceeding 1600°C and in inert atmospheres at temperatures exceeding 1600°C.
  • Excellent Corrosion Resistance: Excellent corrosion resistance to strong acids, bases, and most organic solvents, making it suitable for use in corrosive environments.
  • Excellent Thermal Performance: High thermal conductivity, low thermal expansion coefficient, excellent thermal shock resistance, and resistance to cracking due to sudden temperature changes.
  • High Purity and Insulation: The pressureless sintering process eliminates the introduction of metallic impurities, resulting in high material purity while maintaining excellent electrical insulation properties.

Tipik Uygulamalar

  • Mechanical Seals: Seal rings and bushings in pumps and compressors
  • Chemical Equipment: Corrosion-resistant pipes, nozzles, and valve linings
  • Semiconductor and Electronics Industries: High-temperature carriers, furnace tubes, and liners
  • Wear-resistant Components: Bearings, wear-resistant linings, and sandblasting nozzles
  • Energy and Environmental Protection: Furnace components in the photovoltaic industry, waste incinerator linings

Üretim Süreci

Pressureless sintered silicon carbide ceramics are made from high-purity SiC powder, which is then formed into a mold with a small amount of sintering aid and pressurelessly sintered at temperatures exceeding 2000°C. This process gives the material a dense structure close to the theoretical density, with fine and uniform grains, thus ensuring excellent comprehensive performance.

Reaction-Sintered Silicon Carbide Ceramics (SISiC)

Reaction-Sintered Silicon Carbide Ceramics (SISiC) is a high-performance ceramic material made from silicon carbide (SiC) powder and a carbon source. Liquid silicon is infiltrated into a green body at high temperature, generating a reaction that produces new silicon carbide. Compared to pressureless-sintered silicon carbide (SSiC), SISiC boasts lower production temperatures and a more flexible process, enabling the fabrication of large-scale and complex-shaped structural components. Consequently, it enjoys widespread industrial application.

Temel Özellikler

  • High Hardness and Wear Resistance: SISiC boasts excellent hardness (approximately 9 on the Mohs scale) and excellent wear resistance, making it suitable for friction and abrasion applications.
  • High Mechanical Strength: SISiC exhibits excellent flexural and compressive strength. Although lower than SSiC, it meets the requirements of most industrial applications.
  • Good Corrosion Resistance: SISiC is stable in most acidic and alkaline media and exhibits excellent oxidation resistance, making it suitable for use in the chemical industry.
  • Excellent Thermal Performance: SISiC exhibits a low coefficient of thermal expansion, high thermal conductivity, and excellent thermal shock resistance, enabling stable operation under high-temperature conditions.
  • Capable of Manufacturing Complex Structures: The reaction sintering process is capable of producing large, thin-walled components with complex geometries without the need for expensive hot pressing equipment.

Tipik Uygulamalar

  • Mechanical seals and pump components: seal rings, bushings, pump impellers
  • Chemical equipment: corrosion-resistant linings, valves, nozzles
  • Thermal equipment: kiln furniture, furnace linings, and supports
  • Energy: wear-resistant and corrosion-resistant components for wind, thermal, and nuclear power plants
  • Metallurgical industry: nozzles, channel linings, and sliding bearings

Üretim Süreci

The preparation process of reaction-sintered silicon carbide typically involves:

  • Mix silicon carbide powder with a carbon source to form a green body;
  • Infiltrate liquid silicon at high temperature;
  • The liquid silicon reacts with carbon to form new silicon carbide, densifying the green body.

The advantages of this method include a simple process, low sintering temperature, and minimal dimensional shrinkage, enabling the production of large, complex components close to net dimensions. However, due to the presence of residual silicon, its high-temperature strength and oxidation resistance are slightly inferior to those of SSiC.

Key Properties of Silicon Carbide

Great Ceramic offers a variety of silicon carbide materials for customers to choose from. The following values are typical material properties and may vary depending on product configuration and manufacturing process. For more details, please feel free to Bize ulaşın.

Özellikler Birim SSiC SiSiC Si3N4
Renk -- Koyu Gri Koyu Gri Gri veya siyah
Yoğunluk g/cm³ 3.15 3.02 3.2
Gözeneklilik % ≤0.1 ≤0.1 --
Sertlik GPa 22 22 15
Basınç Dayanımı MPa 2600 2600 2500
Eğilme Dayanımı MPa 400 250 700
Elastik Modül GPa 410 330 300
Maksimum Kullanım Sıcaklığı ℃ 1400 1000 1100
Termal İletkenlik W/(m・K) 100~120 45(1200℃) 15~20
Termal Genleşme Katsayısı 1 x 10-6/°C 4 4.5 3

Silisyum Karbür Malzemelerin Kimyasal Özellikleri

Oksijen reaksiyonundaki sıcaklık 1300°C'ye ulaştığında, silisyum karbür kristalinin yüzeyinde koruyucu bir silisyum dioksit tabakası oluşacaktır. Koruyucu tabakanın kalınlaşmasıyla, iç silisyum karbür direnç gösterir ve bağlanmaya devam eder, böylece silisyum karbür kristal silisyum karbür iyi kimyasal dirence sahiptir. Korozyon direnci açısından SiC malzemeler, silikon dioksit koruyucu filmin rolü nedeniyle güçlü asit direncine sahiptir, ancak alkali direnci zayıftır.

Silicon Carbide Ceramics Application Cases

Great Ceramic's silicon carbide (SiC) ceramics combine outstanding hardness, excellent thermal conductivity, superior wear resistance, and exceptional chemical stability, making them one of the most advanced ceramic materials for demanding industrial applications. With a high melting point, low thermal expansion, and ability to withstand extreme environments, silicon carbide ceramics are ideal for industries that require durability, efficiency, and long service life.

Key Applications of Silicon Carbide Ceramics:

  • Mechanical Seal Rings & Bearings
  • Aerospace Components
  • Silicon Carbide Crucibles
  • Semiconductor Wafer Carriers & Substrates
  • Automotive Components
  • Nuclear & Energy Applications
  • Abrasives & Cutting Tools (Carborundum)
  • Heat Exchangers & Tubes
  • Electronic & Electrical Insulators
  • Custom Precision Ceramic Parts
Bor nitrür seramik nozullar
Silisyum karbür seramikler Mekanik salmastra Conta halkası 1
Alüminyum nitrür alt tabaka lazer kesim
Özel silisyum karbür seramik çarklar
Silisyum karbür seramik (SIC) conta halkası
Alüminyum nitrür seramik ara parça
Yüzey metalize seramik
Silisyum karbür seramik iç kovan-kum değirmeni astarı

Silicon Carbide Ceramic Machining

Silicon carbide (SiC) ceramics are known for their extreme hardness, high thermal conductivity, and excellent wear resistance, making them one of the most challenging technical ceramics to process. At Great Ceramic, we provide comprehensive silicon carbide machining services that deliver industry-leading precision, performance, and reliability.

During machining, we employ advanced diamond grinding, precision lapping, and fine polishing techniques to achieve micron-level tolerances and exceptional surface finishes. These capabilities allow us to meet the stringent structural accuracy and surface quality requirements of mechanical seals, semiconductor substrates, crucibles, heat exchangers, and aerospace components.

With years of technical expertise and state-of-the-art equipment, Great Ceramic not only supplies standardized silicon carbide parts but also develops customized complex components tailored to specific industrial needs, ensuring high reliability and long service life under extreme working conditions.

Hassas Seramik CNC İşleme

CNC Taşlama ve Frezeleme

Mikron düzeyinde toleranslara kadar CNC frezeleme, tornalama ve taşlama.

Seramik Taşlama & Parlatma

Lepleme ve Parlatma

Pürüzsüz yüzeyler ve optik sınıf yüzeyler için yüzey parlatma.

Teknik Seramik Lazer Kesim

Seramik Lazer Kesim

Karmaşık geometriler için lazerle delme ve kesme.

Seramik ve Metal Lehimli Tertibatlar

Metalizasyon ve Kaynak

Seramikten metale sert lehimleme için metalizasyon (Mo/Mn, W).

Sıkça Sorulan Sorular

Silisyum karbür (SiC) is a synthetic compound of silicon and carbon known for its exceptional hardness, thermal stability, and chemical resistance. It occurs in nature only rarely as the mineral moissanite but is widely produced for industrial applications. The silicon carbide definition encompasses both the simple compound and the advanced ceramic materials derived from it.

Evet, silicon carbide is a ceramic material—specifically an advanced technical ceramic. Unlike traditional clay-based ceramics, SiC is part of a class of materials known as "advanced," "engineering," or "technical" ceramics, which are characterized by their superior mechanical, thermal, and electrical properties.

Silicon carbide is used for a wide range of applications including abrasives, refractories, ceramic armor, semiconductor electronics, heating elements, and high-temperature components. Specific silicon carbide applications include mechanical seals, cutting tools, furnace components, power electronics, and wear-resistant parts in industrial equipment.

Silicon carbide is made through several processes. The traditional Acheson method involves heating silica sand and carbon in an electric furnace to temperatures above 2200°C. For higher purity materials, chemical vapor deposition (CVD) is used. To create solid silicon carbide ceramics, powders are formed into shapes and sintered at high temperatures (2000-2200°C) to achieve densification.

Bu electrical properties of silicon carbide can vary widely. Pure SiC is an electrical semiconductor with a bandgap approximately three times wider than silicon. However, silicon carbide conductivity can be modified through doping with specific elements. Some grades can conduct electricity, while others are insulators. The conductivity of silicon carbide makes it valuable for electronic devices that operate at high temperatures, high frequencies, or high power levels.

Silisyum karbür is extremely hard, ranking 9.2-9.5 on the Mohs scale—just below diamond (10) and boron carbide (9.5+). Its hardness is approximately 2500-2800 kgf/mm² (Vickers), making it one of the hardest materials available commercially. This extreme hardness contributes to its excellent wear and abrasion resistance.

Silisyum karbür has high mechanical strength, with flexural strength typically ranging from 300-600 MPa. It maintains this strength at elevated temperatures—at 1400°C, it retains approximately 85% of its room temperature strength. The strength of silicon carbide, combined with its relatively low density, gives it an outstanding strength-to-weight ratio compared to metals and other ceramics.

Büyük Seramik-İleri Seramikler-Alüminyum Nitrür Seramikler

Alüminyum Nitrür

Büyük Seramik-İleri Seramikler-Silikon Nitrür Seramikler 2

Silisyum Nitrür

İleri Seramik Üretim Uzmanı

Why Choose us for Silicon Carbide Ceramics?

At Harika Seramik, we are more than just a silicon carbide ceramics supplier — we are a precision engineering partner. Our strengths include:

  • Material Expertise – In-depth knowledge of SiC properties ensures optimal solutions.
  • Advanced Manufacturing – Precision grinding and polishing for micron-level accuracy.
  • Customization – From standard parts to complex components.
  • Quality Assurance – Strict testing for reliability and performance.
  • Global Reach – Trusted by industries worldwide.

Looking for high-performance silicon carbide ceramics that deliver strength, precision, and reliability?