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Q&A Regarding MCH Heater

What is MCH heater？

MCH heater is the abbreviation of metal ceramic heaters.

It refers to a ceramic heating element in which a meta tungsten or molybdenum manganese paste is printed on a ceramic casting body and laminated by hot pressing and then co-fired at 1600°C, in a hydrogen atmosphere to co-sinter ceramic and metal.

2.What is the advantages of MCH heater?

MCH ceramic heating element is high-efficiency, environmentally friendly, and energy-saving. ceramic heating element, which is mainly used to replace the most widely used alloy wire heating elements and PTC heating elements and components.

Technical characteristics:

Energy-saving, high thermal efficiency, unit heat power consumption is 20-30% less than PTC;
The surface is safe and non-harged, with good insulation performance, can withstand the withstand voltage test of 4500V/1S, no breakdown, and leakage current <0.5mA;
No impulse peak current; no power attenuation; rapid heating; safe, no open flame;
Good thermal uniformity, high power density, and long service life.

3.Resistance Ratio VS Temperature

4.Is it possible to have a built-in sensing resistor in MCH heater?

Yes, In some specific designs, built-in sensing resistors can be done, see below case.

How is the lead wire connected?

There are two methods to be done:

One is brazing technology, material used is silver copper, brazing temperature is 900°C; temperature resisting is 300°C which is recommended.

Another is soldering technology which temperature resisting is 200°C.

If you have more questions, pls contact with us.

LaB6 Ceramics

LaB6 Ceramic is an inorganic non- metallic compound composed of low-valence boron and the rare metal element lanthanum. It is a refractory ceramic that could resist high temperature and harsh environments. LaB6 ceramic has lots of applications due to its ideal thermal, chemical, and electronic properties.
As LaB6 ceramic has the characteristics of high emission current density and low evaporation rate at high temperature, it always work as a cathode material with superior performance and has gradually replaced some tungsten cathodes in industrial applications.

Features:
1. Excellent thermal shock resistance
2. Good electrical conductivity
3. Excellent chemical and oxidation resistance
4.High electron emissivities
5.Stable in Vacuum

Applications:
• Scanning Electron Microscopes
• Transmission Electron Microscopes
• Electron Micro Probe Analyzers
• Electron Lithography Systems
• Electron Accelerators
• Thermal Cathode

Here is the LaB6 Disc:
It has good performance like high conductivity, good stability and slow evaporation rate, which is used as the cathode material in many field of modern technology such as plasma generators, mass spectrometers, electronic micromirrors and electronics.
LaB6 disc is used
1. manufacturing components such as nozzles, turbine blades, and combustion chambers for aerospace engines.
2. Used as corrosion-rsistant seals and valve components for handling corrosive media and process fluids under high-temperature and high-pressure conditions.
3. Used to control rods, and reactor components.
4. Used as refractory materials for furnaces and smelting equipment.
Used to produce high-temperature capacitors, heating elements, and dielectric support materials.

Technical Data of LaB6

Product	LaB6
Lot Number	IN20230403-01-02
Analysis Item	Impurity Element Content
Analytical Technique	Inductively
Test Result	Chemical Composition	Test Result (ppm)
	B	31.25
	La	68.47
	Ce	10
	Pr	12
	Nd	10
	Sm	15
	Y	10
	Fe	25
	Si	11
	Ca	8
	Pb	10
	Mo	10
	Si	10
	Mn	5
	P	5
	S	3
	Particle Size	-300 mesh

Purity>99.5%

Density>4.15g/cm3

Innovacera can provide high purity LaB6 with competitive price. If you have the need, just feel free to contact us.

What are the applications of boron nitride in aerospace?

Boron nitride has a wide range of applications in aerospace, helping to improve the performance, reliability and safety of aerospace vehicles.

High-temperature protective coatings: Boron nitride has excellent high-temperature stability and oxidation resistance, making it an ideal coating material for high-temperature components in rocket engines and aircraft gas turbine engines. It can protect these parts from high temperatures and corrosive environments.
2. Reinforced composites: Boron nitride can be used as a reinforcing phase and combined with other materials to form high-performance composites. These composites can be used to manufacture structural parts for aircraft and spacecraft to improve their strength, stiffness and durability.
3. Lightweight composites: Because boron nitride has the properties of lightweight, high strength and corrosion resistance, it can be combined with other materials to form lightweight composites. These materials have a wide range of applications in the aerospace field, such as spacecraft structures, satellite components and aircraft fuselages.
4. Lubricants: Boron nitride as a lubricant can be applied to various friction and contact surfaces in the aerospace field, such as engine parts, gears and bearings. It has excellent lubricating properties and oxidation resistance, and can maintain effective lubrication under extreme temperature and pressure conditions.
Space radiation shielding: Boron nitride can be used to manufacture space radiation shielding materials to protect astronauts and spacecraft from radiation in space.

In the aerospace field, the application examples of boron nitride are as follows:

Coating of combustion chambers and nozzles of rocket motors: Because of its excellent high-temperature stability and oxidation resistance, boron nitride can be applied as a coating to the combustion chambers and nozzles of rocket motors in order to improve their heat and ablation resistance. This application can extend the service life of the engine and improve the safety and reliability of rocket launches.
Coatings for satellite solar panels: Solar panels on satellites need to withstand extreme temperatures and environmental conditions. Boron nitride coatings can be applied to the surface of solar panels to provide resistance to radiation and protection, thereby increasing their stability and efficiency.
Reinforced composites for aircraft engine components: Aircraft engine components require high-strength and high-temperature resistant materials. By combining boron nitride with other materials, it is possible to form reinforced composites that are used to manufacture components such as blades, ducts and turbines for aircraft engines. This application can improve the performance and reliability of engines and extend their service life.
Thermal insulation for space probes: Space probes are exposed to extremely high temperatures and radiation environments in space. Boron nitride can be used as an insulating material to protect the sensitive parts of space probes from high temperatures and radiation. This application ensures the proper functioning of the detectors and extends their service life.

The above are some summaries for reference only.

If you need more detailed information about the material, please contact us.

sales@innovacera.com

Cynosure Elite Plus Laser Head Cavity Ceramic Laser Cavity Ceramic Reflector

The ceramic laser cavity is a type of laser cavity made from alumina ceramic materials. It is an integral part of a laser system, creating and maintaining the lasing action. Ceramic laser reflectors are high-efficiency diffuse reflectors. Near-perfect diffuse reflection and high reflection efficiency are effectively exploited in laser systems where the pump band of the laser host is in the spectral range of 500 nm to 1200 nm.

Cynosure Elite Plus Laser Head Cavity Ceramic Laser Cavity Ceramic Reflector

Alumina ceramic materials are preferred for laser cavities due to their high thermal conductivity, excellent mechanical properties, and resistance to thermal shock. Innovacera laser reflectors compared to PTFE polymer reflectors, metal reflectors and packed barium powder diffuse reflectors with several desirable characteristics:

Efficient reflection eliminates the need for high-precision focusing reflectors
There will be no coating peeling off like specular metal reflectors.
Ceramic reflectors are not susceptible to localized catastrophic damage from surface contaminants absorbing radiation.
The light field inside the cavity is highly uniform and the output beam profile is more uniform.
Dimensionally stable
The glass surface is corrosion-resistant and allows direct contact with coolant. The full cavity is easily achieved, so the laser head is simple, compact and low-cost.
The ceramic material is strong and durable, resisting breakage when the flash explodes.
Long operational lifetime
High laser output

Ceramic laser cavities are widely used in various applications, including materials processing, laser cutting, medical lasers, scientific research. Their excellent thermal and mechanical properties make them suitable for high-power laser operation while maintaining stability and longevity.

Are Technical Ceramics Corrosion Resistant?

Technical ceramics generally have excellent corrosion resistance, this mainly depends on their chemical composition and microstructure. The chemical composition of ceramic determines the type and extent of its reaction with corrosive media. The microstructure, including grain size, porosity, microstructure, etc., also significantly affects the corrosion resistance of technical ceramics. So they are highly resistant to chemical attacks and do not easily react with aggressive substances. This property makes them suitable for various applications in corrosive environments, such as in the chemical industry, oil and gas industry, marine applications, and electric power generation. Also, technical ceramics have low porosity, high density, and excellent thermal stability, which enhance their corrosion resistance.

In addition to the characteristics of the material, we can also improve the corrosion resistance of the material in the following ways:

1. Surface treated: Technical ceramic surfaces can be treated by coating, plating, oxidation treatment, etc. to improve their corrosion resistance. Such as applying a layer of corrosion-resistant coating on the ceramic surface can effectively prevent the corrosive medium from contacting the ceramic surface, thereby extending the service life of the technical ceramic.

2. Surface Finishing: Polishing or grinding the ceramic surface can help remove any defects that may act as initiation points for corrosion. A smoother surface can also make it more difficult for corrosive substances to adhere to the ceramic.

3. Material Selection: Choosing a ceramic material that has good corrosion resistance can be an effective strategy. For example, materials like alumina, zirconia, or silicon carbide are known for their high chemical stability and ability to resist corrosion.

4. Optimize the ceramics process: By optimizing the ceramic process, its organizational structure and corrosion resistance can be improved. For example, with good molding technology and firing systems, ceramic materials with high density, low porosity, and uniform grain size can be produced, thereby improving their corrosion resistance.

5. Cleaning and Maintenance: Regularly cleaning and maintaining the ceramic components can help prevent the buildup of corrosive substances and extend their lifespan.

Innovacera At Ceramitec 2024

Innovacera’s team is at Ceramitec 2024 from April 9-12 in Mess Munchen Exhibition Center booth No.A6 145. We had an excellent first day. It is good to see the new and old business partner and friend. Thank you for coming to see us from all over the world like France, UK, Spain, Italy,Switzerland, Korea, Singapore.

Innovacera Advance Ceramic Material will show: Alumina Ceramic, Zirconia Ceramic, Aluminum Nitride, Boron Nitride Ceramic, Porous Ceramic, Silicon Nitride Ceramics, Machinable Glass Ceramic, Silicon Carbide Ceramics.

Innovacera cordially invites all old customers, industry professionals, partners, and enthusiasts to visit booth No.A6 145 at Ceramitec 2024.

Main Uses Of Boron Nitride Setter

One of the main materials supplied by INNOVACERA-Boron Nitride is mainly used in refractory materials, semiconductor solid-phase doping sources, structural materials of atomic piles, packaging materials to prevent neutron radiation, rocket engine components, high-temperature lubricants and release agents.

Boron nitride baking plate is a tool used in ceramic kilns to carry and transport fired ceramic bodies.

These sheets have many excellent properties that make them widely used in ceramics and other high-temperature industrial applications.

Boron nitride Setter features and applications：

High purity: Boron nitride setters usually have high purity, which can reach more than 99.7%.

This prevents it from sticking to the product, contaminating the fired ceramic, and has a long service life.

High temperature resistance: The maximum operating temperature of boron nitride setter plate can reach 2100 degrees Celsius.（Under atmospheric protection）

And it has good resistance to high and low temperature repeated impact and carbon corrosion resistance.

Boron nitride setters are widely used in the following scenarios:

1. Push plates, burners, shed plates, and saggers for ultra-high temperature electric kilns and electric furnaces
2. Pollution-free high-temperature sintering of magnetic materials, powder metallurgy, ceramic substrates, zirconia ceramics ,ALN, Si3N4 and other industrial ceramics.
3. Sintering of electronic components (such as MLCC, LTCC, PTC chip resistors and capacitors).

In short, boron nitride burner plates carry and transport fired ceramics in high-temperature environments, improve firing efficiency, and reduce energy consumption. They are one of the indispensable key materials in the ceramic industry.

Why Aluminum Nitride Heater Plate Is Very Difficult To Make

Aluminum nitride ceramic heating plates are widely used in the semiconductor industry. The size is generally 8 inches. The demand for aluminum nitride ceramic heating plates is very tight, but there are very few manufacturers that can process aluminum nitride ceramic heating plates. The main reason is that the aluminum nitride ceramic heating plate is very difficult to process. So why is the aluminum nitride ceramic heating plate difficult to process?

First, we need to understand what the aluminum nitride ceramics are:

Experts in the ceramic industry know that aluminum nitride ceramics are advanced ceramic materials that have high thermal conductivity and electrical insulation properties and are widely used in the electronics industry.

Aluminum nitride crystal belongs to the hexagonal crystal system. It is a covalently bonded compound with tetrahedron as the structural unit and has a wurtzite structure. At the same time, it is also a high-temperature resistant ceramic material. Its single crystal thermal conductivity is about 5 times that of alumina. It can be used in an environment of 2200°C and has good thermal shock resistance.

At the same time, aluminum nitride is resistant to corrosion by metals in the molten state and is almost unstable by acids. Because the aluminum nitride surface reacts to form an extremely thin oxide film when exposed to moist air, takeing advantage of this property and use it as a crucible and firing mold material for the smelting of aluminum, copper, silver, lead and other metals.

The chemical formula of aluminum nitride is AlN, and its chemical composition is about 65.81% AI and 34.19% N. Its powder is generally white or off-white, and it is colorless and transparent in the single crystal state. Its sublimation decomposition temperature under normal pressure reaches 2450°C.

The thermal conductivity of aluminum nitride ceramics is between 170~210 W / (m.k), and the thermal conductivity of single crystal can be as high as 275 W / (m.k) or more. High thermal conductivity (>170W/m·K), close to SiC; thermal expansion coefficient (4.5×10-6℃) is similar to Si (3.5~4×10-6℃) and GaAs (6×10-6℃) Matching; excellent various electrical properties (dielectric constant, dielectric loss, volume resistivity, dielectric strength); good mechanical properties, higher flexural strength than Al2O3 ceramics, can be sintered at normal pressure; can be produced by tape casting process.

Aluminum nitride ceramics is a hard and brittle material. It is very difficult to process after sintered. Its various properties are superior to other ceramic materials, which also means that its processing difficulty is higher than other ceramics. There is another fatal difficulty in processing aluminum ceramics which is it is very brittle and very easy to have white edges.

Under this circumstance, it has become extremely difficult to make ceramic heating plates from aluminum nitride. An 8-inch aluminum nitride ceramic heating plate is approximately a disc with a diameter of 315mm and a thickness of 19mm. The aluminum nitride material used to make the heating plate needs to be larger than this size. In the processing industry, this size is very large. In the processing center It is very easy to damage the entire material when the slot is empty.

The processing cost of such a large aluminum nitride ceramic material is very high. If there is a slight problem in a certain detail, the entire material will be scrapped. So the risk is also very high when processing aluminum nitride heating plates. If a piece of material is damaged, the manufacturer will lose all its money, so many manufacturers are not willing to take this risk, which results in very few manufacturers processing aluminum nitride heating plates.

Boron Nitride Ceramic Evaporation Boat Sets For Thermal Evaporation

In the realm of materials science and manufacturing, thermal evaporation stands as a fundamental process for depositing thin films of various substances onto substrates. Whether in the domain of scientific research or industrial production, the efficiency and precision of thermal evaporation are very important. To meet the demands of this critical process, boron nitride ceramic evaporation boat sets emerge as indispensable tools, offering excellent performance and versatility.

Innovacera offers an extensive selection of boron nitride ceramic evaporation boat sets, readily available for purchase. The remarkable sales volume of this series has surpassed 10,000 units, attesting to its popularity and reliability. The BN ceramic evaporation boat, functioning equivalently to internally heated ceramic containers, caters to a wide spectrum of metal evaporation processes, encompassing precious metals like gold and silver, as well as various other metals and alloys including copper, zinc, nickel, and chromium.

Notably, this boron nitride evaporation boat ensures the complete evaporation of most metals without any loss, with the added advantage of re-usability for the evaporation tungsten basket. Our innovatively developed ceramic evaporation boats offer a novel solution for thermal evaporation needs, serving as invaluable assets for scientific research and metal production requirements alike. Available in sizes ranging from 0.25ml to 3ml, these boats provide versatility to suit diverse application needs.

Innovacera specializes in the development and production of boron nitride products, primarily manufacturing ceramic insulating components, crucibles, tubes, rings, sheets, shaped parts, boats, nozzles, and other boron nitride ceramic products. These products have found successful implementation in ultra-high-tech applications across various fields, including ultra-high temperature equipment production, powder metallurgy gas atomization processing, thermal plastic molding, optical glass manufacturing, horizontal continuous casting, amorphous strip production, technical ceramic components sintering, fluorescent powder sintering, metal casting, electronics industry, superhard materials development, semiconductor fabrication, and aerospace technology applications.

The distinctive features of boron nitride ceramic evaporation boats contribute significantly to their effectiveness in thermal evaporation processes:

High Purity: Boron nitride ceramic ensures the purity of the evaporated material, minimizing contamination and enhancing the quality of the deposited thin films.
Low gas content: BN boats is the minimal presence of gases within the material of the evaporation boats, which can otherwise interfere with the evaporation process or lead to contamination of the deposited thin films
High density: High-density materials are more robust and can withstand the mechanical stresses and thermal cycling inherent in thermal evaporation operations
Uniform grain: A uniform grain structure ensures homogeneous properties throughout the material, including thermal conductivity, mechanical strength, and chemical stability.
Good compactness: the tight packing of grains within the boron nitride ceramic material, resulting in a dense and homogeneous structure.
Complete Evaporation: The design of boron nitride ceramic evaporation boats facilitates the thorough evaporation of most metals without any loss, ensuring maximum efficiency in material utilization.

Magnesium Stabilized Zirconia (MgO-ZrO2) Ceramic Nozzles

1. MgO-ZrO2 Ceramic Metering Nozzles (lnserts)

They are mainly used in steel making continuous casting ladles, converter tundishes, and converter taphole slag retaining mechanisms.

Features:

Good erosion resistance, corrosion resistance
Thermal shock stability
The service time is generally 50 hours, which solves problems such as clogging, cracking and diameter expansion.

Related general products:

Continuous casting tundish upper nozzle
Tundish quick change nozzle
Fixed diameter nozzle for continuous casting.

2. MgO-ZrO2 Ceramic Atomizing Nozzles

They are mainly used in the powder metallurgy industry, the smelting of ferrous and non-ferrous metal powders, such as nickel-based alloy powders, copper powders, stainless steel powders, iron powders and other super alloy powders.

Features:

Higher density,
Excellent resistance to high temperature corrosion,
Resistance to erosion by metallic liquids
Thermal shock performance.

Different stabilizer materials and particle sizes are used according to different requirements. The nozzles of various types and sizes can be customized individually according to different using condition and requirements.

Technical Indicators

Indicators	Item	Units	MSZ-H	MSZ-L
Density		g/cm3	5.35-5.45	5.45-5.60
Main Composition	ZrO2+HfO2	%	≥95	95-96
	Al2O3	%	≤0.2	≤0.2
	SiO2	%	≤0.4	≤0.4
	MgO	%	≤2.9	≤2.9
	Fe2O3	%	≤0.1	≤0.1
	TiO2	%	≤0.1	≤0.1