Hf4 O8

ceramic

· Hf4 O8

Hf4O8 is a hafnium oxide ceramic compound that exists in the hafnia material family, known for exceptional thermal and chemical stability at extreme temperatures. This material is primarily investigated for high-temperature structural applications and advanced refractory systems where conventional oxides reach their performance limits. Hafnium oxides are valued in aerospace and nuclear industries for their resistance to thermal shock, chemical inertness, and ability to maintain mechanical integrity in harsh oxidizing environments above 1600°C.

high-temperature refractory systemsaerospace thermal protectionnuclear reactor componentsthermal barrier coatingsextreme environment ceramicsresearch and development applications

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Bulk Modulus(K)	209.5	GPa	—
Shear Modulus(G)	105.9	GPa	—

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

Property	Value	Unit	Conditions	Source
Band Gap(Eg)	4.123	eV	—

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

Property	Value	Unit	Conditions	Source
Formation Energy(ΔHf)	-3.810	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.

Hf4 O8

Mechanical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental