Pressureless Sintered Silicon Carbide Ceramic PSC Ceramic SiC Industry Ceramic

Overview of Pressureless Sintered Silicon Carbide Ceramic (PSC)

Pressureless sintered silicon carbide is an advanced ceramic material produced through high-temperature sintering without external pressure. It combines the inherent superior properties of silicon carbide with net-dimensional forming capabilities, making it a key material in numerous industrial sectors.

Features of Pressureless Sintered Silicon Carbide Ceramic (PSC)

• Excellent high-temperature performance: Maintains high strength, high hardness, and good creep resistance even at high temperatures.
• Superior corrosion resistance: Resistant to various acids, alkalis, and molten salts.
• High thermal conductivity and low thermal expansion: Good thermal stability and excellent thermal shock resistance.
• Outstanding wear resistance: High hardness and long wear life.
• Net-dimensional forming: The sintering process requires no pressure, enabling the manufacture of complex shapes and dimensionally precise parts.

Specifications of Pressureless Sintered Silicon Carbide Ceramic (PSC)

Property / Parameter	Typical Value	Unit	Test Standard / Notes
General Properties
Bulk Density	3.10 – 3.15	g/cm³	ASTM B311
Porosity	< 0.1	%	Essentially gas-tight
Color	Dark Gray / Black	–	–
Mechanical Properties
Hardness (Vickers, HV0.5)	2400 – 2800	kgf/mm²	ASTM C1327
Flexural Strength (4-pt)	350 – 500	MPa	ASTM C1161
Compressive Strength	> 2000	MPa	ASTM C1424
Fracture Toughness (K1C)	3.5 – 4.5	MPa·m¹/²	SEVNB, ISO 23146
Elastic Modulus	410 – 450	GPa	ASTM C1259
Thermal Properties
Maximum Use Temperature (Inert)	> 1600	°C	Long-term stability
Maximum Use Temperature (Air)	up to 1400 – 1500	°C	Surface oxidation layer forms
Thermal Conductivity @ 20°C	120 – 150	W/m·K	ASTM E1461
Coefficient of Thermal Expansion (20-1000°C)	4.3 – 4.6	x10-6/K	ASTM E228
Thermal Shock Resistance	Very High	–	ΔTc > 500°C
Electrical & Chemical Properties
Electrical Resistivity @ 20°C	102 – 106	Ω·cm	Highly dependent on temperature & doping
Chemical Resistance	Excellent	–	Resists acids, alkalis, and molten salts. Attacked by HF, HNO3/HF, and strong oxidizers.

Applications of Pressureless Sintered Silicon Carbide Ceramic (PSC)

• Sealing components: Mechanical seals, bushings, for harsh operating conditions.
• Wear-resistant components: Nozzles, liners, bearings, for mining, coal preparation, and slurry conveying.
• Corrosion-resistant components: Chemical pumps, valves, heat exchangers, for the chemical industry.
• Kiln furniture and refractory materials: Kiln supports, rollers, used in ceramics, powder metallurgy, and other industries.
• Bulletproof armor: Utilizing high hardness and low density, used for personal and vehicle protection.

Company Profile

Luoyang Tongrun Nano Technology Co. Ltd. (TRUNNANO) is a trusted global chemical material supplier & manufacturer with over 12-year-experience in providing super high-quality chemicals and nanomaterials, including boride powder, nitride powder, graphite powder, ceramic products, 3D printing powder, etc.
 
The company has a professional technical department and Quality Supervision Department, a well-equipped laboratory, and equipped with advanced testing equipment and after-sales customer service center.
 
If you are looking for high-quality Ceramic Products please feel free to contact us or click on the needed products to send an inquiry.

Payment Methods

L/C, T/T, Western Union, Paypal, Credit Card etc.

Shipment

By sea, by air, by express as soon as possible once payment receipt.

FAQs of Pressureless Sintered Silicon Carbide Ceramic (PSC)

What are the differences between pressureless sintering and hot-pressed silicon carbide?

The main difference lies in the forming process. Pressureless sintering requires no external pressure, allowing for the creation of complex shapes; hot-pressing requires pressure applied at high temperatures, resulting in denser products but with limited shape options and higher costs.

What is its maximum operating temperature?

In oxidizing atmospheres (such as air), its long-term stable operating temperature can reach over 1400°C; in inert or reducing atmospheres, the operating temperature can be even higher.

How corrosion resistant is pressureless sintered silicon carbide?

It has excellent corrosion resistance to most acids (such as sulfuric acid and hydrochloric acid) and alkalis, but is not resistant to hydrofluoric acid, hot phosphoric acid, and strong oxidizing molten salts.

What are its main disadvantages?

The main disadvantages are high brittleness, sensitivity to notches, and difficult machining (usually only possible with diamond tools for grinding).

How do I choose the right type of silicon carbide ceramic for my application?

The selection of components should be based on specific working conditions (temperature, corrosive media, wear type, stress conditions) and the requirements for component shape complexity and precision. Consult a professional materials engineer for selection.