Koalas were declared endangered in eastern Australia on Friday, with more and more koalas dying from disease, habitat loss, and other threats. Earlier, the koala was considered a vulnerable species, and the Commonwealth Department of the Environment changed its protection level to endangered on the east coast of Queensland, New South Wales, and the Australian Capital Territory. Many koalas in Australia are infected with chlamydia. The disease can cause blindness, infection, and infertility. Last year, the Australian Koala Foundation said Australia had lost about 30 percent of its koala population in the past three years. Without immediate action, the species could become extinct by 2050.
Unlike koalas, which are on the brink of extinction, the market demand for AlN powder will grow substantially.
Aluminum Nitride Research History
Aluminum nitride is a kind of ceramic material with excellent comprehensive performance, and its research can be traced back more than 100 years ago. It was discovered by F. Birgeler and A. Gutter in 1862, and synthesized by J.W. Mallets for the first time in 1877, but there was no practical application in the following 100 years. It was used as fertilizer only as a nitrogen-fixing agent.
Aluminum nitride is a covalent compound with a low self-diffusion coefficient and high melting point, which makes it difficult to sinter. It was not until the 1950s that the first aluminum nitride ceramics were successfully made and used as refractory materials in the smelting of pure iron, aluminum, and aluminum alloys. Since the 1970s, with the deepening of research, the preparation technology of aluminum nitride has become increasingly mature, and its application scope has also been expanding. Especially since the 21st century, with the rapid development of microelectronics technology, electronic machine, and electronic components is toward miniaturization, light-duty, integration, as well as the development direction, such as high reliability and high power output, more and more complex heat dissipation device to the substrate and packaging material put forward higher request, to further promote the vigorous development of the industry of aluminum nitride.
Aluminum Nitride Characteristics
Aluminum nitride (AlN) is a hexagon wurtzite covalent bond compound with lattice parameters A =3.114, C =4.986. Pure aluminum nitride is blue-white, usually gray or off-white, and is a typical iii-ⅴwide bandgap semiconductor material.
Aluminum nitride (AlN) has the characteristics of high strength, high volume resistivity, high insulation and pressure resistance, thermal expansion coefficient, and a good match with silicon, not only used as a sintering agent or strengthening phase of structural ceramics, especially in the field of ceramic electronic substrate and packaging materials in recent years, its performance is far superior to alumina.
Aluminum Nitride Thermal Conductivity Mechanism
Of the series of important properties of aluminum nitride, the most remarkable is its high thermal conductivity. A great deal of research has been done on the thermal conductivity mechanism of aluminum nitride, and a relatively perfect theoretical system has been formed. The main mechanism is heat transfer through lattice or lattice vibration, that is, by lattice wave or thermal wave. The results of quantum mechanics tell us that lattice waves can be treated as the motion of a particle, the phonon. Thermal waves also have wave-particle duality. Thermal phonons transfer heat through mutual restriction and coordination of vibrations among structural elements (atoms, ions, or molecules). If the crystal is a non-elastic body with a perfect structure, the heat can be transferred freely from the hot end of the crystal to the cold end without any interference and scattering, and the thermal conductivity can reach a very high value. The thermal conductivity is mainly controlled by crystal defects and phonon scattering.
The theoretical thermal conductivity of AlN can reach 320W·m-1·K-1, but the actual thermal conductivity of AlN is less than 200W·m-1· k-1 due to impurities and defects in AlN. This is mainly because the structural elements in the crystal cannot have a completely strict uniform distribution, and there are always different sparse and dense regions, so the current-carrying phonons will always be interfered with and scattered in the propagation process.
Aluminum Nitride Price
The price is influenced by many factors including the supply and demand in the market, industry trends, economic activity, market sentiment, and unexpected events.
If you are looking for the latest AlN price, you can send us your inquiry for a quote. ([email protected])
Aluminum Nitride Supplier
Luoyang Tongrun Nano Technology Co. Ltd. (TRUNNANO) is a trusted global chemical material supplier & manufacturer with over 12-year-experience in providing super high-quality chemicals and Nanomaterials, including silicon powder, nitride powder, graphite powder, zinc sulfide, calcium nitride, 3D printing powder, etc.
If you are looking for high-quality aluminum nitride, please feel free to contact us and send an inquiry. ([email protected])
New Delhi: India is seeking to increase its purchases of crude oil from Brazil, the country's oil minister said recently after meeting his Brazilian counterpart.
India is the world's third-largest importer and consumer of crude oil. Brazil currently supplies only a fraction of India's crude oil imports.
India's state-owned companies Bharat Petroleum Corp and Oil and Natural Gas Corp have invested in oil and gas exploration in Brazil.
India, which imports about 84% of its crude oil needs, is reducing its import bill by increasing biofuel use, among other things.
India's state-owned fuel retailers are increasing ethanol storage capacity by 51 percent and the country plans to double the biofuel blend in petrol to 20 percent by 2025.
India and Brazil are currently cooperating on biofuels and ethanol.
The prices of many commodities like the AlN powder are expected to increase in the future.
Molybdenum disulfide is the main component of molybdenite, which is a black solid powder with metallic luster and is an important solid lubricant.…
Cuprous oxide is a bright red powder that is almost insoluble in water.It is decomposed into divalent copper and copper in acid solutions,and gradually oxidized into black copper oxide in humid air.…
The chemical formula of chromium diboride is CrB2, which is a crystal with high hardness and melting point, and is chemically stable. Concentrated nitric acid is insoluble and can be directly mixed with elements or made from active metal reduction ox…