Ceramic Materials Frequently Used:

- Alumina
- Silicon Carbide
- Boron Carbide
- Zirconia
- Cordierite
- Mullite
- Macor
- Silicon Nitride
- Boron Nitride
- Steatite
 
Aluminum Oxide
Aluminum oxide is the workhorse of advanced technical ceramics. It has good mechanical and electrical properties, wear resistance and corrosion resistance. It has relatively poor thermal shock resistance. It is used as an electrical insulator for a number of electrical and electronic applications, including spark plug insulators and electronic substrates. It is also used in chemical, medical and wear application.
 
Zirconium Oxide
Zirconium oxide has the highest fracture toughness of any advanced technical ceramics. Its toughness, mechanical properties and corrosion resistance make it ideal for medical and selected wear applications. Its thermal expansion coefficient is ver colse to steel, making it an ideal plunger for use in a steel bore. Its properties are derived from a very precise phase composition. Some environmental conditions can make the materials unstable, causing it to lose its mechanical properties. Its relatively low hardness and high weight also limit its broad use in wear applications.
 
Silicon Carbide
Silicon carbide has outstanding wear and thermal shock resistance. It has good mechanical properties, especially at high temperatures. It is a semiconductor material with electrical resistivities in the 10^5 ohm-cm range. It can be processed to a very high purity. Silicon carbide is used extensively for mechanical seals because of its chemical and wear resistance.
 
Boron Carbide
Boron carbide is the hardest material after diamond, giving it outstanding wear resistance. Its mechanical properties, especially its fracture toughness, are low, limiting its application. However, it is used extensively for ballistic armor and blast nozzles. Boron carbide is also a neutron absorber, making it a primary choice for control rods and other nuclear applications.
 
Silicon Nitride
Silicon nitride has the best combination of mechanical, thermal and electrical properties of any advanced technical ceramic material. Its high strength and toughness make it the material of choice for automotive and bearing applications.


Some of the highly desirable properties of ceramics are:

- High Strength
- High Fracture Toughness
- High Hardness
- Excellent Wear Resistance
- Good Frictional Behaviour
- Anti-Static
- Non-Magnetic
- Low Thermal Conductivity
- Corrosion Resistance in acids and alkalis
- Excellent Surface Finish (0.006 μm Ra)
- Modulus of Elasticity similar to steel
- Thermal Expansion Coefficient similar to cast iron

Characteristics	Unit	95 Al2O3	99 Al2O3	ZrO2	SSiC	B4C	Si3N4
Color		white	ivory	white	black	black	gray
Density	g/cm3	3.65	3.88	6.05	3.12	2.51	3.25
Young's Modulus	Gpa	280	350	205	400	420	310
Vickers Hardness	Gpa	14	20	12	25	36	22
Flexural Strength	Mpa	280	300	900	400	370	850
Compressive Strength	Mpa	1700	2000	2500	2200	2900	2800
Thermal Conductivity	W/(m?K)	25	30	2.2	100	35-40	27
Thermal shock resistance	ΔT(C°)	220	180-200	400	350	130	450-650
Max. Working Temperature	C°	1500	1700	850	1500	1500	1200
Volume Resistivity ( 20 C° )	Ω?cm	>10^15	>10^14	>10^12	>10^6	_	>10^14

Ceramic Parts & Components include:

- microwave loads
- high temp clamps
- abrasive nozzles
- brazing fixtures
- heater cores
- ceramic guides
- ceramic discs
- high temp wear parts
- ring laser gyro bodies
- corrosive atmosphere manifolds
- electrical feed-throughs
- high temp clamps
- rings


Our Markets:

- Aerospace (Military & Civil)
- Automotive
- Defence
- Dentistry
- Domestic Household
- Electronics & Opto-Electronics
- Energy & Power Generation
- Foundry
- Medical
- Nuclear Power
- Offshore Oil & Gas
- Transportation


Technical Ceramics Processing

Ceramic forming processes may be classified as traditional – die pressing, cold isostatic pressing, slip casting, and extrusion – or as new and emerging, such as injection moulding and tape casting. Some traditional methods have been refined or adapted to meet particular property requirements. These include hot pressing, hot isostatic pressing, and pressure casting.