Boron nitride crucible can withstand high temperatures in the high vacuum environment, plus it has excellent corrosion resistance and electrical resistance. Thus, boron nitride ceramic crucible is an ideal choice in a wide range of industries, such as:
Nonferrous & ferrous metals such as Al, Bi, Ge, Sb, Sn, Cd, Pb, Ni, Zn, Cu, Mg, Im, Fe, and Stainless Steel.
Glass melt, Soda glass, Cryolite
Silicon molten salt, fluoride, slag
Boron Nitride Crucible Advantages:
1.Low wettability to molten metal
2.Relatively high thermal conductivity with low thermal expansion
3.Relatively high thermal shock resistance
4.Extremely high working temperature with proper inert gas protection
Alumina ceramics is a kind of ceramic material with Al2O3 as the main raw material. It has many advantages, such as high mechanical strength, high hardness, and low dielectric loss at high frequencies, so it is widely used in the fields of electronics, electrical appliances, machinery, textiles, and aerospace. But do you know what is its defect?
Alumina ceramics have a series of production processes. During the process, materials will come into contact with machinery, equipment, tools, utensils, and the environment. Therefore, there are many factors that cause pollution and quality problems in ceramic parts. In general, the common quality problems related to color after sintering of alumina ceramics are:
(1) There are spots on the surface, such as black spots, brown spots, and red spots;
(2) There are plaques on the surface, such as dark plaques, black plaques, bright plaques, etc.;
(3) Ceramic parts have chromatic aberration, such as overall yellowing or graying;
Innovacera has extensive experience in the manufacture of alumina ceramics and we have a lot of solutions to avoid the above issue.
What are the defects on the surface of alumina ceramics？What are the defects on the surface of alumina ceramics？What are the defects on the surface of alumina ceramics？
Zirconium Oxide (or Zirconia) products demonstrate good mechanical properties and stability at elevated temperatures. Zirconium oxides also have excellent chemical inertness and are resistant to corrosion. All of these properties make zirconium oxide ideal for use in refractory products, ceramics materials, and electronic applications.
Zirconium Oxide is also a highly versatile material when combined with other elements. The addition of yttrium oxide unlocks the tetragonal polymorph and further enhances the mechanical properties and forms materials suitable for advanced ceramic applications. These include cutting tools, abrasives, milling media and even medical implants including dental prosthetics. Further addition of yttrium oxide yields the cubic polymorph and can lead to function ceramics which can conduct oxygen ions. Applications include materials for fuel cells, used in oxygen sensors, and cubic zirconia for jewelry. PZT, Glass, bone cement.
Zirconium Oxide doped with magnesium oxide can produce partially stabilized materials that offer thermal resistance and tough materials, ideal for use in refractories.
Zirconium Oxide for electronic applications typically combines zirconia with other metal oxides such as Lead and Titanium oxide to form Lead Zirconium Titanate (PZT). PZT’s are used in ultrasound devices, guidance systems, and sensors. Zirconium oxide can also be used in Solid Oxide Fuel Cells either as zirconia or in yttria-stabilized form.
Refractories
Zirconium Oxide’s excellent thermal resistance and mechanical properties at elevated temperatures make it the perfect material for refractory applications.
Advanced ceramics
Yttrium-doped zirconium oxide provides advanced mechanical properties for use in cutting tools, abrasives, and milling media due to its high wear resistance.
Medical products
Zirconium oxide can be used as a radiopacifier in surgical cement due to its low solubility and biocompatibility. Dental implants can also be manufactured from Zirconium Oxide by carefully controlling the level of yttria added to fine-tune mechanical strength vs. optical properties.
Glass-ceramics
Cubic zirconia is a fully stabilized Zirconium oxide and can be used for jewelry, however, due to zirconia’s excellent refractive index, it can be used in optical glass formulations to improve its properties.
Electronics
Zirconium Oxide, whether on its own or combined with dopants, finds itself in electronic applications, such as PZTs and fuel cells.
INNOVACERA offers a wide range of Zirconium Oxides and Yttria Stabilized Zirconium Oxides.
We’d love to hear about your applications and discuss how our materials can offer you a solution.
This is the premise of realizing ceramic metallization, and its formula needs to be carefully and scientifically designed.
2. Metallization sintering temperature and holding time.
The metallization temperature can be divided into the following four processes:
1) Ultra-high temperature if the temperature exceeds 1600°C,
2) High temperature at 1450~1600°C,
3) Medium temperature at 1300~1450°C,
4) Low temperature if it is lower than 1300°C.
An appropriate sintering temperature is necessary. If the temperature is too low, the glass phase will not diffuse and migrate. If the temperature is too high, the metallization strength will be poor.
3. The microstructure layer of Metallization.
The metallization process determines the microstructure of the metallization layer, and the microstructure directly affects the final performance of the welded body. To obtain good welding performance, the metallization layer should first be a dense film with high bond strength. If the microstructure of the metalized layer has distinct layers and no continuous brittle metal compounds are observed at any interface, the probability of brittleness and crack propagation will be reduced, and the interface will have fewer cracks, which is beneficial to reduce solder penetration. It shows that the metalized layer has good compactness and relatively high bonding strength. what factors are to affect the metallization of ceramic
4. Other factors.
There are still many factors that affect the degree of ceramic metallization that need to be paid factors are to affect the metallization of ceramic[/caption]attention to, such as the influence of powder particle size and reasonable gradation, the powder being too fine, the surface energy being large, and it is easy to form agglomeration, which will affect the smoothness of the coating; if the powder is too coarse, the surface energy decrease, resulting in an increase in the sintering temperature, which affects the sintering quality. In addition, the coating method and the thickness of the coating will also have a great influence on ceramic metallization.
We have 30 years of production experience in metallization ceramics, if you have more questions, pls feel free to contact us. what factors are to affect the metallization of ceramic
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