Article - 16 Aug 2003
Sapphires are well known gem stones. The stages in their processing, such as grading, heat treatment and marketing are discussed. Characteristics and colours are also mentioned.
Article - 26 Jun 2003
Vectra B is a liquid crystal polyester/amide copolymer. It is a high performance thermoplastics deriving properties from its liquid crystalline nature. Morphology and processing are covered as are...
Article - 12 Jun 2003
Vectra liquid crystal polyesters are a group of high performance thermoplastics deriving properties from their liquid crystalline nature. Morphology and processing are covered as are mechanical,...
Article - 8 Oct 2002
The design and performance parameters of ceramic materials in dental restorations are reviewed. Systems such as feldspathic porcelains, leucite systems, castable glasses, alumina-based systems and...
Article - 13 Feb 2002
Titanium can be fabricated in much the same way as stainless steel and nickel-based alloys provided allowances are made for its properties. Some operations covered include welding, resistance welding,...
Article - 2 Jun 2001
Tooth filling materials such as silver amalgams, resin-based composites and ion-leachable glass cements are covered. Cast metals, bonded restorations, ceramics and composite implant materials are also...
Article - 11 Apr 2001
Sialons are a family of ceramics consisting of silicon, aluminium, oxygen and nitrogen with applications in the automotive and matallurgical fields.
Article - 7 Jan 2002
One of the barriers to wide spread acceptance of solar energy is the cost of photovoltaic systems. This article looks at ways these costs can be reduced such as capital costs, deposition rates, other...