Cs2O

ceramic

· Cs2O

Cesium oxide (Cs₂O) is an ionic ceramic compound belonging to the alkali metal oxide family, characterized by a highly basic and hygroscopic nature. While primarily of research and specialized industrial interest rather than widespread engineering use, Cs₂O serves niche applications in photomultiplier tubes, optical coatings, and catalytic systems where its strong oxidizing properties and low work function are advantageous; it is notably more reactive and moisture-sensitive than other alkali oxides, making handling and integration into devices technically challenging compared to conventional ceramics.

photomultiplier tube cathodesvacuum electronicsspecialized optical coatingscatalyst precursorsresearch materials

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Dielectric Constant (Relative Permittivity)(εr)	8.422 range 4.598–12.25median of 2 measurements	-	—

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

Property	Value	Unit	Conditions	Source
Formation Energy(ΔHf)	-1.197	eV/atom	—

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

Regulatory Screening

Environmental

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.

Cs2O

Electrical Properties

Other Properties

Regulatory Screening

Environmental