Каталог Sumitomo пластины с режущей кромкой-моноалмаз Sumicristal - страница 2

Synthetic Single Crystal Diamond

SUMICRYSTAL

• General Features

SUMICRYSTAL is a large grained, high-purity single crystal diamond which our company, the first in the world, has succeeded in producing for industrial applications. SUMICRYSTAL is manufactured under stringent quality control to achieve stable quality and is best suited for industrial use.

• Manufacturing Method

Synthetic single crystal diamond SUMICRYSTAL is grown from a seed crystal, using the temperature difference between

the carbon raw material and seed crystal, within a super high

Inside of the super high pressure chamber

pressure chamber similar to the one shown in the diagram, at 5~6GPa and 1,300~1,600℃ . The crystals are grown under Synthesis conditions stringent controlled pressures and temperatures to consistently Pressure: 5 to 6 GPa obtain crystals of uniform shape with low impurities. Temperature: 1,300 to 1,600°C

• Applied pressure

Characteristics

Piston SUMICRYSTAL has 4 advantages when compared to natural diamond.

Die Raw material carbon Solvent metal

The first is its shape. Natural diamonds are rounded and its crystal orientation is difficult to determine with the naked eye. High temperature SUMICRYSTAL has distinct crystal face which makes identification easier.

Second is its uniformity. Consistent quality is obtained by growing Temperature the crystals under industrially controlled conditions. difference (20 to 50°C) The third advantage is that SUMICRYSTAL can be mass produced unlike the limited supply natural diamonds. The fourth advantage is physical properties. SUMICRYSTAL type Low temperature Ib for cutting tools, contains a small amount of nitrogen impurities Seed crystal but has better mechanical and thermal properties compared to natural diamonds. SUMICRYSTAL Applied pressure

• Microfracture strength of synthetic diamond
• Diamond thermal conductivity

2500 30 DD SUMICRYSTAL 2000 25 Natural diamond DD 1500 DD 20

M 1000 JJ

15 JJ JJ

500 Natural diamond, Ia type

10 0 50 100

Natural diamond SUMICRYSTAL °

SUMIDIA Temperature ( C) SUMIDIA Binderless Thermal conductivity of synthetic and natural diamond SUMICRYSTAL