We supply vaporation Boat

s manufactured from tungsten, molybdenum, molybdenum-lanthanum (ML), molybdenum-

yttrium oxide (MY) or tantalum. Our evaporation boats offer a good level of electrical

conductivity and possess low vapor pressures combined with a very high melting point. When

powered on, our boats heat the material for evaporation. During this process, the low vapor

pressures of our metals ensure that no tungsten, tantalum or molybdenum particles enter the

vapor and penetrate the subsequent layer.
Which boat is right for your coating material?

Which boat type fits which coating material? You can find an overview of our

evaporation boats and coating materials here. Of course, we are also happy to help you

individually with your material choice.
Boron Nitride Ceramics are advanced synthetic ceramic materials available

in solid and powder form. Its unique properties – from high heat capacity and outstanding

thermal conductivity to easy machinability, lubricity, low dielectric constant and superior

dielectric strength – make boron nitride a truly outstanding material.
In its solid form,

Hexagonal Boron Nitride is often referred to as “white graphite” because it has a

microstructure similar to that of graphite. However, unlike graphite, boron nitride is an

excellent electrical insulator that has a higher oxidation temperature. It offers high

thermal conductivity and good thermal shock resistance and can be easily machined to close

tolerances in virtually any shape. After machining, it is ready for use without additional

heat treating or firing operations.
To make solid shapes, Hexagonal Boron Nitride Powders and binders

are hot-pressed in billets up to 490mm x 490mm x 410mm at pressures up to 2000 psi and

temperatures up to 2000°C. This process forms a material that is dense and easily machined

and ready to use. It is available in virtually any custom shape that can be machined and

has unique characteristics and physical properties which make it valuable for solving tough

problems in a wide range of industrial applications.
Boron Nitride Coating is one of the few materials that offers electrical

insulation and high thermal conductivity. This makes BN extremely useful in high power

electronic applications in heat sink and heat spreader applications. Other materials that

are commonly used are Aluminum Nitride, beryllium oxide, and sometimes Alumina – however,

all of these materials are significantly more difficult to machine into intricate shapes.
Why is Cubic Boron

Nitride called a superhard material? If you are looking for the answer to this

question, then you've come to the right place. In this article, we will take a closer

look at the cubic boron nitride and try to answer why cubic boron nitride is called a

superhard material.
Cubic boron nitride (CBN) is a super hard material synthesized by hexagonal boron

nitride and catalyst under high temperature and pressure. The hardness of this superhard

material is second only to diamond in industrial application. The thermal stability of



Cubic Boron Nitride Powder is much higher than that of diamond, and it has greater

chemical stability for iron series metal elements. Therefore, the cubic boron nitride

grinding tool has been widely used in the cutting and grinding fields of iron fund products

with excellent performance.
There are two kinds of cubic boron nitride: single crystal and polycrystalline sintered

body. The single crystal is obtained by controlling the hexagonal boron nitride and

catalyst in pressure in 3000 ~ 8000 Mpa and the temperature in 800 ~ 1900 ℃. Typical

catalyst materials are selected from alkali metals, alkali earth metals, tin, lead,

antimony, and their nitrides. The crystalline form of cubic boron nitride has the truncated

cone of tetrahedron, octahedron, skew crystal and twin crystal, etc. Commercially produced

cubic boron nitride is black, amber, and gold-plated with particles usually less than 1 mm

in size.
Application of Boron Nitride Polycrystal in Metal Cutting Field
Cubic Boron Nitride Cutting Tools are a kind of superhard material

product that are formed by the coalescence of many fine grains (0.1~100 micron) CBN. In

addition to high hardness and abrasion resistance, it also has the characteristics of high

toughness, chemical inertness, red hardness, etc., and can be polished with the cutting

edge of the diamond grinding wheel. It shows excellent cutting performance in all aspects

of machining and can achieve stable cutting at high temperatures, so it is especially

suitable for machining all kinds of hardened steel, tool steel, chilled cast iron, and

other hard-working materials with high hardness.
PCBN has most of the properties of CBN, and overcomes the disadvantages of directional

cleavage of CBN single crystal surface, and has many performance advantages.