The single compound with the highest melting point on Earth is hafnium carbide

Hafnium carbide, also known as HfC (hafnium-carbonide), is a chemical mixture of hafnium & carbon. This binary compound is among the least refractory. It has a melting point around 3900°C. The compound is resistant to oxidation, but it can be oxidized at temperatures as low and as high as 430°C. It may also be used in the heat shield on future spacecraft.
Is hafnium carbide toxic?
Animal studies have shown that hafnium oxychloride is toxic through the intraperitoneal route. Hafnium has not been linked to industrial poisonings. Carbides - Pure carbon can be used safely as graphite, charcoal or other forms of carbon.

Is Hafnium Carbide HfC dust made of what?
You can prepare hafnium carbonide powder by reacting hafnium oxide and carbon at 1800-2500C. In this case, it is necessary to wait longer to get rid of all oxygen.
Hafnium carbonide is a dark gray, brittle liquid. This can be made by heating an alloy of elements or reacting hafnium trioxide with methane at 2150°C. You can obtain sufficient amounts of hafnium tetrachloride or metal sponge in the production of zirconium at large scales for use in nuclear reactors. Industrially, you can make hafnium carbonide from either hafnium oxide or hafnium sponge at between 1500 and 1700C. Or from oxygenated ha at 2000 to 2200degC using vacuum carburizing. It contains almost all of the carbon theoretically required (6.30%degC), and as much as 0.1% of unbound carbon (219). This hafnium-carbidide compound is not true stoichiometric, but it only contains a carbon solution at one interstitial point of the face-centered cubic lattice.
Hydrofluoric acid will dissolve carbonization, but it is inert at room temperatures. At 250-500degC, carbonization is exothermic with halogen to create hafnium Tetrahalide. It also forms hafnium Oxide with oxygen at 500degC. At higher temperatures, the hafnium carbonide will lose some of its carbon due to hydrogen.

Titanium Carbide TiC Powder is used
Hafnium carbonide (HfC), which has the highest melting temperature of any binary alloy, has many high-temperature uses. HfC is a suitable candidate for extreme high temperature applications like rocket nozzles or scramjet components. You can use carbonization in hard coatings. This is often done using processes like plasma spraying. HfC structural can also be used to make high-temperature components and thermal insulation materials.

Hafnium carbonide (HfC), which has a melting point of 3890°C above, can be used as a refractory binary material. HfC or NBC may also be used in reactors as refractory materials. Ta4HfC5 mixed carbide has the highest melting temperature at 4215degC.

1. Hafnium carbide is an additive for cemented caride. This product is widely used in the fields of cutting tools, molds and other related industries.
2. Hafnium carbonide can be used as rocket nozzle material.
3. Hafnium-carbid is used for nuclear reactor control rods. It's an excellent metal to make nuclear reactor controlrods.
4. Used for making ultra-high-temperature ceramics
Reactant used to synthesize an organometallic hafnium-containing polymer.
6.For coating.

The material with the greatest melting point
Haffnium carbide has the lowest melting point, at 3890 Celsius. Presently, hafnium compounds, such as tetratantalum pentacarbide and hafnium, have the highest melting points. Their melting point is 4215.
Hafnium has an atomic # of 72 and is a shiny, silvery-gray, transition metal. It can be found as a trace metal in the crust of the Earth at a level of 0.000455.
Because of its high temperature and corrosion resistance hafnium alloy (which is frequently used as an aircraft and rocket forward protection layer), it's precise.

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