The Introduction of Pyrolytic Boron Nitride Crucible

PBN is a particular material of ceramics. It’s sedimentary the process just like ”Snowing” — hexagon-shaped PBN by dropping on graphite material in parallel till to a certain thickness. After cooling, it becomes the PBN ceramic component.  The PBN ceramics are widely used to make VGF crucibles, LEC crucibles, MBE crucibles, Thermal Insulation Board, Synthetic Boat, PBN coated products for making single-crystal from GaAs.

Main Features:

1. The product is white, non-toxic,non-porous, and easy-making.
2. The purity is up to 99.99% and its surface is very compact
3. It has good hermeticity and high-temperature resistance. Its intensity increases with temperature and maximizes at 2200°C.
4. It has many good properties such as acid-resistance, alkali-resistance, salt-resistance, and reagent-organic-resistance. It is insoluble and non-reactive with most molten-metals, semiconductors, etc.under high temperature.
5. It has good thermal shock resistance and good conductivity. It has a low coefficient of thermal expansion.
6. It has high resistance, high dielectric- strength, and low dielectric constant. It has a low magnetic loss tangent.lt has good performance to allow microwave and infrared ray to pass through.
7. lt has distinct differences among mechanics performance, thermotics performance and electricity performance.

Ceramic Ballistic Plates

INNOVACERA produces alumina ceramic, sintered silicon carbide ceramic, and boron carbide ceramic, our high-quality ceramics always with perfect ballistic performance.

We produce powders by ourselves. We could control quality from raw materials to the finished ceramics, with a production capability of 300 tons of high-quality sintered silicon carbide.

We have the regular size of the rectangle 50*50, Hexagonal opposite side dimensions 88; 68; 30; 20. The thickness range is 5-20mm.

High-quality products, professional service, timely delivery. INNOVACERA is your trustable supplier.

Safe and finger-friendly ceramic scissors

Our ceramic scissors are made from Zirconia ceramics (ZrO2), which will never rust. The most important difference is in the proprietary grinding process that results in a finger-friendly cutting edge. The double angle creates a shorter Initial Cutting Zone. This results in less risk to the user.

They are safe and finger-friendly. This means that, while our scissors cut materials effectively, they avoid cutting skin. They are very suitable to be used at home to cut baby food without toxicity. Used in institutional, educational settings alike, these lightweight scissors are flexible and durable.

Canpared to traditional steel scissors, ceramic scissors have many benefits:

• Never rusts,no special oil coating or maintenance
• Light weight
• Stay edge and sharp
• Very sharp
• Corrosion resistant
• Non-conductive

What is Dielectric Ceramic?

Dielectric ceramic is a kind of ceramic material which resistivity is greater than 108Ω∙m, and can withstand the strong electric field without breakdown. The dielectric material is an insulator, putting more emphasis on its polarization characteristics. According to the characters of its dielectric properties can be divided into electrical insulating ceramics, ceramic capacitor, piezoelectric and ferroelectric ceramics. They are usually expressed by volume resistivity, dielectric constant, and dielectric loss.

What is volume resistivity?
The resistance of material per cubic volume, the higher the volume resistivity, materials for electrical insulation components of the higher efficiency.

What is a dielectric constant?
It is used to measure an insulator to store electrical energy performance, it is two pieces of the metal plate with insulation materials as the medium compared with air as medium or vacuum, the ratio of the capacitance.

What is dielectric loss?
Dielectric loss refers to the dielectric under the effect of the alternating electric field, the consumption of electricity per unit time.

Taking the insulating ceramic as an example, we will introduce its properties, classification, and application to better understand it.

Insulation material is not conductive, requiring high resistivity as far as possible. To become an excellent insulating ceramics, must have the following properties:

• Volume resistivity: ≥1012 Ω∙cm
• Relative dielectric constant ≤ 30
• Good thermal conductivity, close to conductor material thermal expansion coefficient, heat resistance, high strength, and chemical stability

Classification of insulating ceramic:

• The oxide, such as Si02, A120, etc
• The non-oxide, such as Si3N4, BN, AIN, etc
• Single crystal insulating ceramics, such as silicon, synthetic mica (the floorboard of the layered structure of aluminum silicate), spinel, synthetic sapphire, etc.

The application of the insulating ceramic:

• High-performance ceramic insulator which can withstand the pressure of more than 500 keV used in extra-high-voltage power transmission.
• Ceramic spark plugs used for automobiles, ceramic ignition needles used for gas stoves
• The substrate used for integrated circuits and packaging materials
• Ceramic insulating tubes are used for electrical and electronic.

Should you have more interests, pls contact us at any time.

PBN-PG Heaters

Pyrolytic graphite (PG) is placed on the surface of PBN plates by the CVD method as a conductor and heater. And the PG heating element could be covered by PBN again. As both PG and PBN are extremely pure (99.99% or even higher) and very stable in a vacuum or inert atmosphere, the PBN-PG heating element could be very durable and keep the chamber clean. It could be heated to ultra-high 1600°C for a very short time without emission of any gas component. These heating elements are ideal products for the semiconductor industry and applications that require high temperature, high vacuum, and high purity.

PBN/PG Heater Advantages：
1. PBN composite heating element has an operating temperature of up to 1600°C.
2. High mechanical durability and dimensional stability.
3. High thermal shock resistance.
4. PBN layer provides electrical insulation.
5. Eliminate outgassing and contaminations.
6. Thermal gradients can be tailored.
7. Chemically inert to almost all metals, liquids, and gas.
8. Large variety of PG heater and PGN heater shapes is available.

Silicon Nitride Igniter

Silicon nitride igniters are normally rectangular in shape. These igniters have a lot of operation zone up to 1000 degrees C. and a cold zone in the contact area. The encapsulated terminal can prevent short circuits caused by conductive contamination. They can be operated with or without a controller. Silicon nitride igniters have several times the durability that of alumina ceramic igniter.

Dimension power and input voltage are customizable according to your requirement.

Silicon Nitride igniter can heat up to 800 to 1000 degrees within tens of seconds. The max temperature is 1200 degrees C. Silicon Nitride ceramic can sustain corrosion of melting metals. With proper installation and igniting process, the igniter can use for several years.

Metallized Ceramics

Innovacera provides solutions for high-reliability vacuum-tight joints with extreme bond strength. Metalized ceramics are commonly used in many applications.

Applications:
Feed-through insulators/Vacuum interrupters
High-power receptacles
Insulator rings and cylinders
Precipitator products
Power switches
Traveling wave tubes
X-ray tubes

How to make boron nitride ceramic part?

When we make boron nitride ceramic part, generally we make big billet, our billet max size is 420 * 430 * 220 mm, and then machine it as other small part or customized shape part. In the producing process, we separated powder with graphite mould by graphite paper to make sure there is no reaction between them.

Boron Nitride is easy to machine it, so we can machine it by common tool and we machine it without water or other liquid. We also have precision CNC engraving and milling machine to make high precision part. Generally the best tolerance we make is +/-0.03 mm (small part) or +/-0.05 mm for bigger part.

Our BN part Produce process is as belows: Powder granulation – Put Powder in the graphite mould–Prepare Dry – Hot Press with sintering-Machine.

In the sintering process, the product is Sintering together with hot pressing. Our sintering furnace is pressing is from both the top an bottom that can make the product is more dense and uniform to make sure the quality, some other factory sintering furnace is just pressing from one side only. Our factory total have 9 sets sintering furnace and it was designed by our own engineer who are from the famous university. Our 99% BN ceramic part sintering temperature is 2000℃ and the compound boron nitride sintering temperature is 1850℃。

Innovacera boron nitride part such as ceramic insulator part for furnaces, ceramic crucibles and boats for molten melting, nozzles for powder metal gas atomization and amorphous strips are hot sales products.

If you need any customized boron nitride part, welcome to contact us at sales@innovacera.com.

Alumina Thermalcouple protection tube

Materials:
By operating temperature, due to variable alumina, it is further divided into 99.5 (corundum), 99 (corundum), 95 (corundum), 85 (alumina porcelain), 75 (mullite porcelain), for materials above, the more the alumina, the higher the operating temperature, the maximum aluminum content vertical use at 1710°C，the minimum aluminum use at 1100°C.

Application:
Mainly used for protection of thermometric elements, to isolate them from outside and reduce or prevent them being corroded, oxidized, or damaged during use.

Stock size of protective tube:
Outer diameter 4mm to 30mm, maximum length 1600mm, wall thickness by dimension scale of product 0.5mm to 4mm.

How to use ?
During use, the thermometric element is insulated well put into the protective tube, and then the open end and the couple ends are sealed with high-temperature clay. When in measurement, the sealed end is inserted into the temperature measuring zone, and it is best to prevent shock cooling or heating from damaging the protective tube during use.

Boron Nitride Solid Parts

A machinable ceramic, Boron Nitride (BN) can be machined into complex parts. After machining, the parts are ready to use without additional heat treatment or firing operations. BN solid parts are mainly used to variously of the super-high temperature of vacuum furnace, metal or glass melting crucible and nozzles. Boron Nitride is most commonly produced as a hot pressed solid which orients during pressing, yielding a hexagonal and platy crystal structure. The resulting material properties are anisotropic, relative to the pressing direction. In fact, the material properties can vary significantly, relative to the direction of pressing and the grade of material.