Quick Answer: What Is The Least Heat Conductive Material?

Which of the following has lowest thermal conductivity?

MercuryAmong Metals, Mercury seems to be lowest thermal conductive metal with value of 8.4 W/m K….For pure metallic elements (some verging on the metalloids) you have thermal conductivity (TC) at 20 °C of :Bismuth , 7.97 W/(m·K)Manganese , 7.81 W/(m·K)Plutonium , 6.74 W/(m·K)Mercury , 8.30 W/(m·K).

What is K in heat?

Thermal conductivity (often denoted by k, λ, or κ) refers to the intrinsic ability of a material to transfer or conduct heat. … The rate at which heat is transferred is dependent upon the magnitude of the temperature gradient, and the specific thermal characteristics of the material.

Is stainless steel a good heat insulator?

Titanium and its alloys have extremely low thermal conductivity. It also tends to be extremely resistant to corrosion. Stainless steel is also a good insulator, though not as good as Ti.

Which metal is the best insulator?

Metals such as copper typify conductors, while most non-metallic solids are said to be good insulators, having extremely high resistance to the flow of charge through them. “Conductor” implies that the outer electrons of the atoms are loosely bound and free to move through the material.

Is Aluminium a good insulator?

Aluminum. Aluminum is a shiny, silver-like metal, numbered 13 on the periodic table of elements. It is a conductive metal, as it allows for the easy flow of electrons. Interestingly, while aluminum is electrically-conductive, it is a good insulator of heat.

Does stainless steel absorb heat?

Stainless Steel With one of the lowest thermal conductivities for a metal alloy, stainless takes much longer to conduct heat away from a source than, say, copper. … Steam and gas turbines in power plants use stainless steel because of its heat resistance, among other properties.

Is Diamond a good conductor of electricity?

Diamonds do not conduct electricity. Many engineers once believed diamonds could not conduct electricity due to a tetrahedron structure made by covalent bonds between carbon atoms, which doesn’t allow for free electrons to carry current.

Are Diamonds electrically conductive?

Thermal conductivity Unlike most electrical insulators, diamond is a good conductor of heat because of the strong covalent bonding and low phonon scattering. Thermal conductivity of natural diamond was measured to be about 2200W/(m·K), which is five times more than silver, the most thermally conductive metal.

What materials Cannot transfer heat?

Material with low thermal conductivity are good thermal insulators (i.e. they do not absorb or transfer heat). ‘Silicon Aerogel’ has the lowest thermal conductivity. Other than that, materials like Polyurethane foam, Fiberglass or Foam-glass, Expanded polystyrene also have low conductivity.

What is the best heat conductor?

Along with its carbon cousins graphite and graphene, diamond is the best thermal conductor around room temperature, having thermal conductivity of more than 2,000 watts per meter per Kelvin, which is five times higher than the best metals such as copper.

Which material has least thermal conductivity?

As you can see, out of the more common metals, copper and aluminum have the highest thermal conductivity while steel and bronze have the lowest. Heat conductivity is a very important property when deciding which metal to use for a specific application.

What type of material does not conduct heat or electricity?

insulatorsMaterials that are poor conductors of heat are called insulators. Air, which has a conduction coefficient of . 006, is an exceptional insulator because it is capable of being contained within an enclosed space.

What is the most heat conductive material?

Along with its carbon cousins graphite and graphene, diamond is the best thermal conductor around room temperature, having thermal conductivity of more than 2,000 watts per meter per Kelvin, which is five times higher than the best metals such as copper.

What is the best heat insulator?

Plastic, rubber, wood, and ceramics are good insulators. These are often used to make kitchen utensils, such as saucepan handles, to stop heat from flowing up to burn the cook’s hand. Plastic coating is also used to cover most electrical wires in appliances. Air is also a good insulator of heat.

Which has maximum value of thermal conductivity?

Diamond is the leading thermally conductive material and has conductivity values measured 5x’s higher than copper, the most manufactured metal in the United States. Diamond atoms are composed of a simple carbon backbone that is an ideal molecular structure for effective heat transfer.

What is a bad insulator?

Plastic insulator Plastic insulator. Materials such as plastic are bad conductors of electricity. They do not allow electricity to flow through them. A plastic covering is wrapped around electrical wires, to protect us from electric shocks.

What kind of materials will not conduct electricity?

Metals are generally very good conductors, meaning they let current flow easily. Materials that do not let current flow easily are called insulators. Most nonmetal materials such as plastic, wood and rubber are insulators.

What liquid has the highest thermal conductivity?

WaterWater. Water is one of the best choices for liquid cooling applications due to its high heat capacity and thermal conductivity. It is also compatible with copper, which is one of the best heat transfer materials to use for your fluid path.