A high-temperature sintering furnace is a furnace that makes the solid particles of ceramic green bodies bond to each other at high temperatures, so that the grains grow, the voids (pores) and grain boundaries gradually decrease, and through the transfer of substances, the total volume shrinks, the density increases, and finally becomes a dense polycrystalline sintered body with a certain microstructure.

A vacuum sintering furnace refers to a furnace that performs protective sintering on heated objects in a vacuum environment. There are many heating methods, such as resistance heating, induction heating, microwave heating, etc. A vacuum sintering furnace is a furnace that uses induction heating to perform protective sintering on heated objects. It can be divided into industrial frequency, medium frequency, high frequency and other types, which can be classified as a subcategory of vacuum sintering furnaces.