Archive for the ‘Silicon’ Category
Thursday, April 6th, 2006
Silicones - Glass Fibre and Mineral Filled
Advantages
Significantly improved flexural modulus, better tensile strength, notched impact strength, mould shrinkage, surface hardness and linear expansion compared with unmodified silicone.
Disadvantages
Lower elongation at break, HDT; reduced electrical characteristics and flow compared with unmodified silicone.
Typical Properties
Property
Value
Density (g/cm3)
1.85
Surface Hardness
RM90
Tensile Strength (MPa)
35
Flexural Modulus (GPa)
14
Notched Izod (kJ/m)
0.05
Linear ...
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Thursday, April 6th, 2006
GE Advanced Materials, a division of General Electric Company, has launched a series of new additions to the company’s range of silicone surfactants.
The Niax(R) Silicone L-3415, L-3416 and L-3417 stabilise MDI and MDI-TDI flexible moulded foam used in automotive seating, and are based on a new molecular design that can ...
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Thursday, April 6th, 2006
Background
Fast, accurate photocopying is taken for granted these days. At the press of a button we expect rapid delivery of dozens of copies identical to the original document. Yet not many people appreciate the intricate system of mirrors, drums and rollers which makes up in inner workings of a photocopier, ...
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Thursday, April 6th, 2006
Background
Sialon® is a solid solution of Silicon Nitride with Aluminium Oxide and Aluminium Nitride. It exhibits high strength at high temperatures, is hard, tough and wear resistant. It is chemically inert and thermal shock resistant. These properties all make Sialon® ideal for foundry use, including use as containers for molten ...
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Thursday, April 6th, 2006
Background
Silicon Nitride, like Silicon Carbide, is also available in two main types, reaction bonded and sintered.
Typical Properties of Silicon Nitride
Silicon nitride is an electrical insulator and is resistant to attack by many molten metals. With low thermal conductivity and excellent thermal shock resistance, silicon nitride is used in many ...
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Thursday, April 6th, 2006
Background
Hot pressing of Silicon Nitride produces a material of virtually zero porosity. This hard, grey ceramic is, however, still very lightweight. Silicon Nitride shows good resistance to wear and abrasion. It shows very little oxidation at elevated temperatures, and high hardness and strength above 1000°C. One of its main assets ...
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Thursday, April 6th, 2006
Australia’s contribution to developing the next generation of memory chip technology is about to get a boost with construction starting on a new $10 million dedicated research centre at Griffith University.
The Queensland Microtechnology Facility (QMF) is being built at Griffith’s Nathan campus in Brisbane and will become the new home ...
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Thursday, April 6th, 2006
Background
The chemical formula for Silicon Monoxide is SiO.
Key Properties
Property
Value
Density ( g.cm-3 )
2.13
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Thursday, April 6th, 2006
Background
During research to develop an ultra-low NOx burner, scientists at the NASA High Speed Research (HSR) programme developed a silicon carbide fibre reinforced silicon carbide (ceramic matrix composite) combustor liner.
Other Significant Developments
Development of this component required the researchers to:
· Develop an advanced silicon carbide fibre with high temperature ...
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Thursday, April 6th, 2006
Background
Silicon nitride bonded silicon carbide (NBSC) can be produced by heating a mixture of silicon and powder and silicon carbide grains and firing to temperature usually in the range 1300-1450°C in nitrogen. SiAlON bonded silicon carbide refractories and ceramics can be formed in the same way, with addition of clay ...
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