Biorplid Keramik

Type 4**
yellow / Au 86.0 
palladium-free, silver-free, copper-free

Composition: Au 86.0 / Pt 12.5 / In 1.5
Standard: DIN EN ISO 22674 and DIN EN ISO 9693
Colour: yellow
Melting range °C: 1160–1060
Soft annealing: 15 mins at 900 °C / quench in water
Hardening: 15 mins at 550 °C / air
Preheating temperature °C: 800
Casting temperature °C: 1290
Further heating after melting (secs): electr.: 60–90
inductive: 5–10
flame: 5–10
Density g/cm3: 19.2
CTE 25°C–500°C (µm/mK: 14.4
CTE 25°C–600°C (µm/mK: 14.2
Soldering before firing: Orplid Ceramic solder 1050
Soldering after firing: Orplid solders 760, 735
Vickers hardness (HV 5/30): w: 90
a: 170
g/b: 120/150
0.2% proof stress (MPa): w: 110
a: 415
g/b: 230/270
Elongation at break (%): w: 30
a: 13
g/b: 10/19
Spruing: Following the rules for dental applications (see General Instructions for Use)
Investment: Phosphate-bonded investment materials (Cehacast P or Cehacast Speed)
Preheating: 800 °C, 30 to 120 mins until end temperature, depending on size of mould
Casting: 1290 °C, possibly increase by 20°C–30°C for resistance-heated vacuum pressure casting. Graphite crucible or open flame with ceramic crucible.
Finishing: With carbide burs and/or ceramic-bonded stones. Always grind in one direction only! Avoid using high speeds or applying heavy pressure (scale formation); sandblasting with 50–125 µm aluminium oxide. Pressure should not exceed 2 bar
Cleaning: Steam jet cleaning or boiling in distilled water
Oxide firing: 5 mins at 940°C without vacuum
Soldering before firing: Orplid Ceramic solder 1050
Soldering after firing: Orplid solders 760, 735
Firing: For normally expanding ceramic materials (e.g. CeHa WHITE® Classic)