Ceramic Watch Parts

Ceramic Watch Parts

RRP: USD $18

Ceramics are essentially inorganic solids (organic ones are polymers) that are also not metals.

 So in addition to what is usually thought as “ceramics”, glass, diamond and graphite are classified as ceramics. The sapphire used as watch crystals is also a ceramic. Engineering wise, ceramics are divided into four sections. Among these “engineering ceramics” are what we will cover today. 

The rest of the three sections are what we know as ceramics in daily life i.e. tableware, bricks, tiles, etc. Engineering ceramics themselves have many classes and it is not possible for us to cover them all in such an article. 

Thus we will talk about their general properties and advantages. Unlike earthenware (which is comparatively brittle), engineering ceramics are made of very pure materials. These pure ingredients ensure the needed properties can be produced consistently. Usually the ingredients are oxides, carbides, nitrides etc. Most of which are compounds of metals with oxygen, nitrogen, carbon or others. 

XY Ceramic Property
XY GradeZ-100Z-200Z-300ZM-100ZB-100
Flexural Strength Mpa900105012004501100
Compressive StrengthMpa21002200230016002300
Modules of ElasticityGpa200210220210220
Fracture ToughnessMPam1/26785.57
Poision's Ratio0.
Hardness HRAHRA8990908890
Vickers HardnessHV112501450145012401450
Thermal Expansion Coefficient10-6K-11110101010
Thermal ConductivityW/mk33333
Thermal Shock Resistance△T.℃400400400400
Maximum Use Temperature
in Oxidizing Atmosphere
Max Use Temperature
in Reducing or Inert Atmosphere
Volume Resistivity at 20℃Ωcm10^1310^1210^125X10^1310^12
Dielectric StrengthkV/mm1915171917