HfYO2S

ceramic

· HfYO2S

HfYO2S is an experimental hafnium-yttrium oxysulfide ceramic compound that combines hafnium and yttrium oxides with sulfide components, representing a emerging research material in the high-temperature ceramics family. This material is primarily investigated for ultra-high temperature applications and thermal barrier coating systems where conventional oxides face limitations, particularly in aerospace and energy sectors seeking improved thermal stability and oxidation resistance beyond 1200°C. The hafnium-yttrium combination is notable for its potential to suppress grain growth and enhance fracture toughness compared to single-oxide alternatives, though HfYO2S remains largely in the research phase and industrial adoption is limited.

thermal barrier coatingshigh-temperature aerospace componentsrefractory materials researchextreme environment protectionadvanced hypersonic vehicle materialsnext-generation gas turbine systems

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Band Gap(Eg)	0.000	eV	—
Magnetic Moment(μB)	0.5307	μB	—

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

Property	Value	Unit	Conditions	Source
Formation Energy(ΔHf)	1.360	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.

HfYO2S

Electrical Properties

Other Properties

Regulatory Screening

Environmental