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Information about some ceramics:

                     Alumina is a strong and hard material with good electrical insulation property up to 1400oC. It withstands heat up to 1670oC in air and has good resistance to alkali.

                     Mullite has less mechanical strength and hardness but has superior thermal properties.

                     Silicon carbide is the hardest material practically available to industry. It is often used for wearing resistance applications in hostile environments. It can be microwave heated to red hot in seconds (1200o C in your own microwave oven! ). Our silicon carbide pipes with up to 500 mm diameter manufactured has been used in the most hostile environments and it has been proved that its wearing resistance is 10-15 time better than steel.

                     Zirconia in partially stabilized form is the toughest material among ceramics. It can be used up to 1750oC but it has a relatively poor thermal shock property. Zirconia ceramic has an excellent resistance to attacks by various molten metals. However the cost to manufacture this material is relatively high.

                     Fused silica has a near zero thermal expansion coefficient, hence a well known ceramic material for its excellent thermal shock resistance. It is most suitable for applications requiring rapid thermal cycling (up to 1500oC). Fused silica also has an excellent chemical resistance in severely acidic conditions.

                     .Boron nitride is a soft ceramic and therefore can be machined to various shapes with conventional tools. It can be used up to 1100oC in air and to 3000oC in non-oxidizing environment. A unique property of boron nitride is the non-wettability by many molten metals and glasses at elevated temperatures. .BN is expensive (about 60 per kg), thus BN in coating form is developed at HP Technical Ceramics.







   New Product Developments:

1.      Ceramic filter with various pore size ranges and low pressure drop.

2.      Poreslides: Ceramic substrates with nano-pore surface structure, a unique platform for chemical and bio-chemical applications.