What are Ceramics?

Ceramics encompass such a vast array of materials that a concise definition is almost impossible. However, one workable definition of ceramics is a refractory, inorganic, and nonmetallic material. Ceramics can be divided into two classes: traditional ceramics and advanced ceramics.

Traditional ceramics include clay products, silicate glass and cement
Advanced ceramics consist of carbides (SiC), pure oxides (Al2O3), nitrides (Si3N4), non-silicate glasses and many others.

In general, advanced ceramics have the following inherent properties:

• Hard (wear resistant)
• Resistant to plastic deformation
• Resistant to high temperatures
• Good corrosion resistance
• Low thermal conductivity
• Low electrical conductivity

However, some ceramics exhibit high thermal conductivity and/or high electrical conductivity.

The combination of these properties means that ceramics can provide:

• High wear resistance with low density
• Wear resistance in corrosive environments
• Corrosion resistance at high temperatures

Ceramics offer many advantages compared to other materials. They are harder and stiffer than steel; more heat and corrosion resistant than metals or polymers; less dense than most metals and their alloys; and their raw materials are both plentiful and inexpensive. Ceramic materials display a wide range of properties which facilitate their use in many different product areas.

• Aerospace: space shuttle tiles, thermal barriers, high temperature glass windows, fuel cells
• Consumer Uses: glassware, windows, pottery, Corning¨ ware, magnets, dinnerware, ceramic tiles, lenses, home electronics, microwave transducers
• Automotive: catalytic converters, ceramic filters, airbag sensors, ceramic rotors, valves, spark plugs, pressure sensors, thermistors, vibration sensors, oxygen sensors, safety glass windshields, piston rings
• Medical (Bioceramics): orthopedic joint replacement, prosthesis, dental restoration, bone implants
• Military: structural components for ground, air and naval vehicles, missiles, sensors
• Computers: insulators, resistors, superconductors, capacitors, ferroelectric components, microelectronic packaging
• Other Industries: bricks, cement, membranes and filters, lab equipment
• Communications: fiber optic/laser communications, TV and radio components, microphones

 

What are Ceramics?

Ceramics encompass such a vast array of materials that a concise definition is almost impossible. However, one workable definition of ceramics is a refractory, inorganic, and nonmetallic material. Ceramics can be divided into two classes: traditional ceramics and advanced ceramics.

Traditional ceramics include clay products, silicate glass and cement
Advanced ceramics consist of carbides (SiC), pure oxides (Al2O3), nitrides (Si3N4), non-silicate glasses and many others.

In general, advanced ceramics have the following inherent properties:

• Hard (wear resistant)
• Resistant to plastic deformation
• Resistant to high temperatures
• Good corrosion resistance
• Low thermal conductivity
• Low electrical conductivity

However, some ceramics exhibit high thermal conductivity and/or high electrical conductivity.

The combination of these properties means that ceramics can provide:

• High wear resistance with low density
• Wear resistance in corrosive environments
• Corrosion resistance at high temperatures

Ceramics offer many advantages compared to other materials. They are harder and stiffer than steel; more heat and corrosion resistant than metals or polymers; less dense than most metals and their alloys; and their raw materials are both plentiful and inexpensive. Ceramic materials display a wide range of properties which facilitate their use in many different product areas.

• Aerospace: space shuttle tiles, thermal barriers, high temperature glass windows, fuel cells
• Consumer Uses: glassware, windows, pottery, Corning¨ ware, magnets, dinnerware, ceramic tiles, lenses, home electronics, microwave transducers
• Automotive: catalytic converters, ceramic filters, airbag sensors, ceramic rotors, valves, spark plugs, pressure sensors, thermistors, vibration sensors, oxygen sensors, safety glass windshields, piston rings
• Medical (Bioceramics): orthopedic joint replacement, prosthesis, dental restoration, bone implants
• Military: structural components for ground, air and naval vehicles, missiles, sensors
• Computers: insulators, resistors, superconductors, capacitors, ferroelectric components, microelectronic packaging
• Other Industries: bricks, cement, membranes and filters, lab equipment
• Communications: fiber optic/laser communications, TV and radio components, microphones

 

What are the uses of Boron Nitride Ceramics?

Nitride Boron can be used in the manufacture of crucibles for smelting semiconductors and metallurgical high-temperature vessels, amorphous strip nozzles, semiconductor heat dissipation insulation parts, high-temperature bearings, thermocouple bushing, and glass forming molds.

Usually produced Boron Nitride is a graphite-type structure, commonly known as white graphite. The other is diamond type. Similar to the principle of transforming graphite into diamond, graphite-type boron nitride can be transformed into diamond-type boron nitride under high temperature (1800℃) and high pressure (800Mpa).

The B-N bond length (156pm) of this boron nitride is similar to the C-C bond length (154pm) of a diamond, and the density is similar to the diamond. The hardness of this boron nitride is similar to diamond, but the heat resistance is better than diamond. It is a new type of superhard material with high-temperature resistance, which is used to make drill bits, grinding tools, and cutting tools.

What are the uses of Boron Nitride Ceramics

Boron Nitride Material Properties-SU0012

Properties	Units	UHB	HB	BC	BMS	BMA	BSC	BMZ	BAN
Main Composition	BN>99.7%	BN>99%	BN>97.5%	BN+AL+SI	BN+ZR+AL	BN+SIC	BN+ZRO2	BN+ALN
Color	White	White	White	White Graphite	White Graphite	Greyish Green	White Graphite	Greyish Green
Density	g/cm3	1.6	2	2.0-2.1	2.2-2.3	2.25-2.35	2.4-2.5	2.8-2.9	2.8-2.9
Three-Point Bending Strength	MPA	18	35	35.00	65	65	80.00	90	90.00
Compressive Strength	MPA	45	85	70.00	145	145	175.00	220	220.00
Thermal Conductivity	W/m·k	35	40	32.00	35	35	45.00	30	85.00
Thermal Expansion Coefficient (20-1000℃）	10-6/K	1.5	1.8	1.60	2	2	2.80	3.5	2.80
Max Using TemperatureIn Atmosphere In Inactive Gas In High Vacuum (Long Time)	(℃）	900 2100 1800	900 2100 1800	900 2100 1900	900 1750 1750	900 1750 1750	900 1800 1800	900 1800 1800	900 1750 1750
Room Temperature Electric Resistivity	Ω·cm	>1014	>1014	>1013	>1013	>1013	>1012	>1012	>1013
Typical Application:	Nitrides Sintering	High Temperature Furance	High Temperature Furance	Powder Metallurgy	Powder Metallurgy	Powder Metallurgy	Metal Casting	Powder Metallurgy
High Temperature Electrical Furnace Components (High Temperature Insulator Sleeve Tube etc)	√	√	√	√	√	√	√
Metal Vaporize Crucible	√	√	√
The Container Of Metal or Glass Melting	√	√	√	√	√	√	√	√
The Casting Mould Components Of The Precious Metal And Special Alloy.	√	√	√
High -Temperature Support Part	√	√	√
Nozzle And Transport Tube Of The Melting Metal	√	√	√	√	√	√	√
Nitrides Sintering	√

Remark: The value is just for review, different using conditions will have a little difference