Hafniumcarbid

Hafniumcarbid Chemische Eigenschaften,Einsatz,Produktion Methoden

Chemische Eigenschaften

dark, gray, brittle solid; fcc, a=0.4640 nm; high cross section for absorption of thermal neutrons; resistivity 8.8μohm· cm; most refractory binary material known; hardness 2300kgf/mm2; used in control rods of nuclear reactors; can be prepared by heating HfO2 with lampblack under H2 at 1900°C–2300°C; used in crucible form for melting hafnium oxide, other oxides [KIR80] [HAW93] [CER91]

Physikalische Eigenschaften

Dark gray brittle solid, most refractory binary material known. Controls rods in nuclear reactors, crucible container for melting HfO and other oxides. 2 Corrosion resistant to liquid metals such as Nb, Ta, Mo, and W. Severe oxidation in air above 1100–1400°C and stable up to 2000°C in helium.

Verwenden

Hafnium carbide (HfC) with a melting point over 3890°C is a refractory binary compound. HfC and NbC can also be used as refractory coatings in nuclear reactors. The mixed carbide Ta4HfC5 possesses the highest melting point of any currently known compound at 4215°C.

Vorbereitung Methode

Hafnium carbide is a dark gray, brittle solid. It can be prepared by heating a mixture of the elements or by reacting hafnium tetrachloride with methane at 2100 C. Sufficient quantities of hafnium oxide or hafnium metal sponge are obtained during the large-scale production of pure zirconium for nuclear reactors. On an industrial scale, hafnium carbide can be produced from the hydrided hafnium sponge at 1500–1700 ℃ or from hafnium oxide at 2000–2200 ℃ by carburization in vacuo in the presence of hydrogen. The resulting carbide contains almost the theoretical quantity of carbon (6.30% °C) and a maximum of 0.1% free carbon (219). The hafnium carbide obtained is not a true stoichiometric compound as much as a solution of carbon at specific interstitial sites of a face-centered cubic hafnium lattice.
Hafnium carbide is inert to most reagents at room temperature but is dissolved by hydrofluoric acid solutions. Hafnium carbide reacts exothermally with halogens at 250–500 ℃to form hafnium tetrahalide, and to form hafnium oxide with oxygen above 500℃. In the presence of hydrogen, hafnium carbide slowly loses some of its carbon at higher temperatures.

Hafniumcarbid Upstream-Materialien And Downstream Produkte

Upstream-Materialien

Downstream Produkte

Hafniumcarbid Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

Firmenname	Telefon	E-Mail	Land	Produktkatalog	Edge Rate
Hebei Mojin Biotechnology Co., Ltd	+8613288715578	sales@hbmojin.com	China	12456	58
career henan chemical co	+86-0371-86658258	sales@coreychem.com	China	29914	58
Hubei Jusheng Technology Co.,Ltd.	18871490254	linda@hubeijusheng.com	CHINA	28180	58
Hebei Guanlang Biotechnology Co., Ltd.	+86-19930503282	alice@crovellbio.com	China	8823	58
Hefei TNJ Chemical Industry Co.,Ltd.	0551-65418671	sales@tnjchem.com	China	34572	58
Baoji Guokang Healthchem co.,ltd	+8615604608665 15604608665	dominicguo@gk-bio.com	CHINA	9427	58
Zhuoer Chemical Co., Ltd	02120970332; +8613524231522	sales@zhuoerchem.com	China	3015	58
Henan Alfa Chemical Co., Ltd	+8618339805032	alfa4@alfachem.cn	China	12755	58
ShanDong Look Chemical Co.,Ltd.	+8617653113219	sales01@sdlookchemical.com	China	2739	58
Alfa Chemistry	+1-5166625404	Info@alfa-chemistry.com	United States	21317	58

12069-85-1(Hafniumcarbid)Verwandte Suche:

---

• HAFNIUM CARBIDE
• Hafnium carbide ceramics
• hafnium(iv) carbide
• HAFNIUM CARBIDE , 45 MICRON
• Hafnium carbide, 99.5% (metals basis excluding Zr), Zr <1%
• HAFNIUM(IV) CARBIDE, <1.25 MICRON
• HAFNIUM(IV) CARBIDE -325MESH
• Hafnium Carbide, -325 Mesh
• Hafnium carbide/ 99+%
• Hafnium monocarbide
• Hafnium(IV) carbide <1.25 mum particle size
• Hafnium carbide, 99.5% trace metals basis
• Hafnium carbide powder (HfC)
• um 99.8%Methanidylidynehafnium(1 Methanidylidynehafnium(1+)
• hafnium,methane
• Methanidylidynehafnium(1+)
• Hafnium carbide HfC
• Niobium Oxide (Nb2O5) Powder
• Hafnium(IV) carbide, 99.8%
• Hafnium(IV) carbide, <1.25 μm
• Hafnium Carbide Micro powder
• Cobalt Chromium (Co-Cr) Alloy Sputtering Targets
• 12069-85-1
• HfC2
• HfC
• CHf
• Hafnium
• Catalysis and Inorganic Chemistry
• CarbidesChemical Synthesis
• Catalysis and Inorganic Chemistry
• Ceramics
• Hafnium
• Metal and Ceramic Science