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物性表

Diamond PCD
(Diamond sintered body)
Sapphire/Ruby Cemented carbide Alumina Zirconia Quartz glass
Physical Properties Chemical Composition C C+バインダー Al2O3 WC+Co Al2O3 ZrO2 SiO2
Density 3.515 3.9~4.1 3.98 14.7~15.1 3.6~4.1 6.0~6.1 2.2
Crystal System Cubic Sintered body Hexagonal Sintered body Sintered body Sintered body Amorphous
Mechanical Properties Tensile Strength
GPa
1~4 1.3 0.5 0.8~1.7 0.12~0.21 0.14 0.05
Bending Strength
GPa
N.A. 1.1~2.6 0.5~0.7 2.4~2.6 0.2~0.7 0.8~1.7 0.06
Compressive Strength
GPa
6~11 6.9~7.6 3.0~3.4 6.1 2.5~4.4 2.9~3.9 1.1
Young’s Modulus
GPa
1,000~1,100 776~920 350~470 620~640 260~380 180~220 72~82
Hardness HK 6,000~11,000 HV 6,000~12,000 HK 1,500~2,000 HK 1,700 HV 1,000~2,300 HV 1,200~1,500 HK 590~620
Thermal Properties Thermal conductivity
W/(m・K)
600~2,000 400~500 40 80 17~33 1.7~2.9 1.3
Coefficient of Linear Expansion
10-6/K
1~4 4~6 5~9 5 7~8 8~10 0.4~0.6
Electrical Properties Electric Resistivity
Ω・m
106~1018 1.4×10-4
(Useable for EDM)
106~1013 10-7 1012 1012 1012
Optical Properties Refractive Index
(589.3nm)
2.417 -- C軸⊥ 1.768 -- -- -- 1.458
C軸∥ 1.760

Conversion Expressions: 1kgf/mm2=0.0098GPa、1dyn/cm2=0.1Pa、1cal/(cm・sec・℃)=418.4W/(m・K)
※The above properties are not guaranteed. These data should not be specified as engineering requirements or used for design purposes.

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