The hardest substance is cubic boron nitride. The material with the highest melting point should be hafnium alloy (Ta4HfC5) cubic boron nitride, a transparent crystal with a Vickers hardness of 108G pa, and diamond with a Vickers hardness of 100GPa. The secret of this hard substance comes from its nano-microscopic structure, folded like an onion or nested like a Russian nesting doll. Normally, in order to make things harder, science... Help: 35.03 million Unfold The hardest substance of all is the cube boron nitride. The material with the highest melting point should be hafnium alloy (Ta4HfC5) cubic boron nitride, a transparent crystal with a Vickers hardness of 108G pa, and diamond with a Vickers hardness of 100GPa.
Molybdenum, tungsten can withstand more than 2000 degrees; Alloy metals such as hafnium alloy (Ta4HfC5), tungsten and copper. Metal materials should be protected against oxidation at high temperature. What material can withstand high temperatures of more than 2000 degrees, can conduct electricity, and is not carbon products? Molybdenum in 2000 degrees above, can oxidation? Environment: the bottom of electric furnace, basically do not touch air. Molybdenum in 2000 degrees above, can oxidation? Environment: the bottom of the electric furnace will not touch.
Zirconium material Zr702(UNS R60702) pure zirconium R60702 characteristics: zirconium is a kind of corrosion resistance is very strong metal, suitable for chemical corrosion resistance equipment, its acid resistance is better than titanium and a variety of steel, close to tantalum. Zirconium is also quite stable in alkaline solutions. Zirconium is fully resistant to alkaline solutions and molten bases. It has the same corrosion resistance as nickel in sodium hydroxide media, and due to its excellent corrosion resistance, zirconium is in many cases more expensive than tantalum and nickel.
The metal hafnium is non-toxic. Mainly used in electronics industry. However, some hafnium compounds have certain toxicity (for example, THE LD50 of HfCl4 is 2362 mg/kg, which is a very low toxicity substance). Hafnium, metal Hf, atomic number 72, atomic weight 178.49, is a lustrous silver-gray transition metal. There are six naturally stable isotopes of hafnium: hafnium 174, 176, 177, 178, 179, 180. Hafnium not with dilute hydrochloric acid, dilute sulfuric acid and strong base.
Because "element" is just a name for a class of atoms with the same number of protons. The difference in neutron numbers gives rise to the concept of isotopes. That is, it's hard to say that something is made up of something, but that something is made up of some atom of some element, some compound, whatever.
