SmB66

semiconductor

· SmB66

SmB₆ (samarium hexaboride) is a rare-earth ceramic compound belonging to the hexaboride family, known for its metallic behavior and low work function despite being a ceramic material. It is primarily used in thermionic emission devices, electron microscopy, and high-temperature applications where stable electron sources are critical; its combination of thermal stability, low evaporation rates, and reliable electron emission makes it preferred over tungsten in demanding vacuum electronics and scientific instrumentation.

thermionic electron sourcesscanning electron microscopy cathodeshigh-temperature vacuum deviceselectron gun componentsresearch instrumentationaerospace electronics

Compliance & Regulations

?EAR?Conflict Free?RoHS?REACH?TSCA?Prop 65

Units:

si imperial

Property	Value	Unit	Conditions	Source
Band Gap(Eg)	0.8000	eV	—

Verified Unverified Low confidence (<80%) Link to source

Regulatory Screening

Environmental

Export Control

RoHS, REACH, and Prop 65 statuses are validated against official substance lists (ECHA SVHC Candidate List, OEHHA Prop 65, RoHS Annex II). Other regulations are estimated from composition and material classification. All screening is a starting point for due diligence — always verify with your supplier before making compliance decisions.

SmB66

Electrical Properties

Regulatory Screening

Environmental

Export Control