Hafnium oxide

Hafnium oxide Properties

Melting point	2810 °C
Density	9.68 g/mL at 25 °C(lit.)
refractive index	2.13 (1700 nm)
solubility	insoluble in H2O
form	powder
color	Off-white
Specific Gravity	9.68
Water Solubility	Insoluble in water.
Crystal Structure	Monoclinic
Merck	14,4588
Exposure limits	ACGIH: TWA 0.5 mg/m3 NIOSH: IDLH 50 mg/m3; TWA 0.5 mg/m3
InChIKey	CJNBYAVZURUTKZ-UHFFFAOYSA-N
CAS DataBase Reference	12055-23-1(CAS DataBase Reference)
EPA Substance Registry System	Hafnium oxide (HfO2) (12055-23-1)

SAFETY

Risk and Safety Statements

Symbol(GHS)

GHS07

Signal word

Warning

Hazard statements

H315-H319

Precautionary statements

P264-P280-P302+P352-P337+P313-P305+P351+P338-P362+P364-P332+P313

Safety Statements

22-24/25

WGK Germany

3

TSCA

Yes

HS Code

28259085

NFPA 704

	0
1		0

Hafnium oxide price More Price(20)

Manufacturer	Product number	Product description	CAS number	Packaging	Price	Updated	Buy
Sigma-Aldrich(India)	769401	Hafnium(IV) oxide pellets, diam. × thickness 13?mm × 5?mm	12055-23-1	25G	₹10825	2022-06-14	Buy
Sigma-Aldrich(India)	769398	Hafnium(IV) oxide pellets, diam. × thickness 9?mm × 4.2?mm	12055-23-1	25G	₹13953.43	2022-06-14	Buy
Sigma-Aldrich(India)	203394	Hafnium(IV) oxide ≥99.95%	12055-23-1	1G	₹10229.63	2022-06-14	Buy
Sigma-Aldrich(India)	202118	Hafnium(IV) oxide powder, 98%	12055-23-1	25G	₹6062	2022-06-14	Buy
Sigma-Aldrich(India)	202118	Hafnium(IV) oxide powder, 98%	12055-23-1	100G	₹16518.95	2022-06-14	Buy

Product number	Packaging	Price	Buy
769401	25G	₹10825	Buy
769398	25G	₹13953.43	Buy
203394	1G	₹10229.63	Buy
202118	25G	₹6062	Buy
202118	100G	₹16518.95	Buy

Hafnium oxide Chemical Properties,Uses,Production

Description

Hafnium is a shiny, silvery, ductile metal and resistant to corrosion. The physical properties of hafnium metal samples are markedly affected by zirconium impurities, especially the nuclear properties, as these two elements are among the most difficult to separate because of their chemical similarity. Hafnia is used in optical coatings and as a high-k dielectric in dynamic randomaccess memory (DRAM) capacitors. Hafnium (IV) oxide is a colourless, inert solid and has been reported as one of the most common and stable compounds of hafnium. It is an electrical insulator. Hafnium dioxide is an intermediate in some processes that give hafnium metal. It reacts with strong acids and strong bases. It dissolves slowly in hydrofluoric acid. At high temperatures, it reacts with chlorine in the presence of graphite or carbon tetrachloride and forms the hafnium tetrachloride. Hafnium-based oxides are currently important materials to replace silicon oxide as a gate insulator because of its high dielectric constant. Hafnium (Hf) is found in association with zirconium ores, production based on zircon (ZrSiO4) concentrates which contain 0.5%–2% hafnium. Hafnium has extensive applications in industries especially because of its resistance to corrosion. Different compounds of hafnium used in ceramics industry are hafnium boride, hafnium carbide, hafnium nitride, hafnium oxide, hafnium silicate, and hafnium titanate. Hafnium-based oxides are currently leading candidates to replace silicon oxide as a gate insulator in fieldeffect transistors.

Chemical Properties

Hafnium oxide is a white cubic crystal, insoluble in water, hydrochloric acid, nitric acid and other common inorganic acids, and slowly dissolves in hydrofluoric acid to form fluorohafnate. It reacts with hot concentrated sulfuric acid or bisulfate to produce hafnium sulfate. Mix and heat with carbon in the presence of chlorine to obtain hafnium tetrachloride. It reacts with potassium fluorosilicate to produce potassium fluorohafnate.

Physical properties

Hafnium oxide (HfO2) is a white crystalline powder. Pure hafnium oxide exists in three forms, one in the amorphous state and the other two in the crystalline state. When unstable compounds such as hafnium hydroxide and hafnium oxychloride are calcined at <400°C, amorphous hafnium oxide can be obtained. Continue to heat the hafnium oxide to 450-480°C, and start to transform into monoclinic crystals, and continue to heat to 1000-1650°C to gradually increase the lattice constant, and transform into a monomer of 4 hafnium oxide molecules. At 1700~1865℃, it starts to transform into tetragonal crystal system. Hafnium is a refractory metal which occurs in nature in zirconium minerals.
hafnium oxide crystal structure

Uses

Hafnium(IV) oxide is used as Intermediates, Paint additives and coating additives, metal Products. And it is also used in optical coatings, as a refractory material in the insulation of such devices as thermocouples.

Potential Exposure

Hafnium metal has been used as a control rod material in nuclear reactors. Thus, those engaged in fabrication and machining of such rods may be exposed.

Shipping

UN1326 Hafnium powder, wetted with not <,25% water (a visible excess of water must be present) (1) mechanically produced, particle size<53 μm; (2) chemically produced, particle size<840 μm, Hazard Class: 4.1; Labels: 4.1-Flammable solid. UN2545 Hafnium pow der, dry, Hazard Class: 4.1; Labels: 4.1-Flammable solid. UN1346 Hafnium powder, wetted with not less than 25% water (a visible excess of water must be present) (1) mechanically produced, particle size less than 53 μm; (2) chemically produced, particle size less than 840 μm, Hazard Class: 4.1; Labels: 4.1-Flammable solid.

Incompatibilities

Fine powder or dust may form explosive mixture in air. The powder is highly flammable and a strong reducing agent. The powder or dust reacts with moisture forming flammable hydrogen gas; may spontaneously ignite on contact with moist air; and at higher temperatures, with nitrogen, phosphorous, oxygen, halogens, and sulfur; contact with hot nitric acid; heat, shock, friction, strong oxidizers; or ignition sources may cause explosions.

Waste Disposal

Recovery. Consider recycling, otherwise, this chemical must be disposed of in compliance with existing federal and local regulations.

Hafnium oxide Preparation Products And Raw materials

Raw materials

HAFNIUM Oxygen HAFNIUM SULFATE

Preparation Products

Hafnium oxide Suppliers

Global( 190)Suppliers

Supplier	Tel	Country	ProdList	Advantage	Inquiry
SNA HEALTHCARE PVT LTD	+91-8652842416 +91-8652842416	Mumbai, India	88	58	Inquiry
Intelligent Materials Private Limited	08048953178	Punjab, India	197	58	Inquiry
Central Drug House(P) Ltd.	91-11-49404040	New Delhi, India	6160	58	Inquiry
CLEARSYNTH LABS LTD.	+91-22-45045900	Hyderabad, India	6351	58	Inquiry
Otto Chemie Pvt. Ltd.	+91 9820041841	Mumbai, India	5873	58	Inquiry
Alfa Aesar	1 800 209 7001	Maharashtra, India	6913	58	Inquiry
Zhuoer Chemical Co., Ltd	02120970332; +8613524231522	China	3005	58	Inquiry
Henan Tianfu Chemical Co.,Ltd.	+86-0371-55170693 +86-19937530512	China	21675	55	Inquiry
career henan chemical co	+86-0371-86658258 +8613203830695	China	29900	58	Inquiry
Chongqing Chemdad Co., Ltd	+86-023-6139-8061 +86-86-13650506873	China	39916	58	Inquiry

Supplier	Advantage
SNA HEALTHCARE PVT LTD	58
Intelligent Materials Private Limited	58
Central Drug House(P) Ltd.	58
CLEARSYNTH LABS LTD.	58
Otto Chemie Pvt. Ltd.	58
Alfa Aesar	58
Zhuoer Chemical Co., Ltd	58
Henan Tianfu Chemical Co.,Ltd.	55
career henan chemical co	58
Chongqing Chemdad Co., Ltd	58

Hafnium oxide Spectrum

HAFNIUM OXIDE(12055-23-1)IR1 HAFNIUM OXIDE(12055-23-1)Raman

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