HfH4C4O4

ceramic

· JVASP-112154· HfH4C4O4

HfH₄C₄O₄ is an oxycarbide ceramic compound containing hafnium, hydrogen, carbon, and oxygen—a complex mixed-phase material that sits at the intersection of refractory ceramics and functional oxides. This appears to be a research-phase composition rather than an established commercial material; compounds in this family are investigated for extreme-environment applications where thermal stability, oxidation resistance, and hardness are critical, particularly in aerospace and high-temperature structural contexts where traditional carbides or oxides alone prove insufficient.

High-temperature structural ceramicsAerospace thermal protectionRefractory coatingsOxidation-resistant materialsResearch/development phaseExtreme environment applications

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Density(ρ)	0.1529	lb/in³	—

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

Property	Value	Unit	Conditions	Source
Band Gap(Eg)	2.215	eV	—
Magnetic Moment(μB)	0.000	µB	—

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

Property	Value	Unit	Conditions	Source
Energy Above Hull(ΔEhull)	0.3402	eV/atom	—
Formation Energy(ΔHf)	-0.9996	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.

HfH4C4O4

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental