What is Alumina Nanoparticle used for?
Saudi Aramco, the world's largest oil company, released a briefing showing a profit of 181.64 billion Saudi riyals in the second quarter of 2022, once again setting a record for quarterly earnings after the company went public in 2019. Continue to maintain the status of "the most profitable company in the world".
Saudi Aramco said that the increase in profit in the second quarter was mainly due to higher crude oil prices and sales and improved profit margins in the refining processing and sales division, while the company's second-quarter shareholder dividend will reach 70.3 billion Saudi riyals.
In the first half of this year, the conflict between Russia and Ukraine disrupted the global energy market, with crude oil prices rising above $120 at one point, causing refining profits to soar, not only for Saudi Aramco, but also for companies such as ExxonMobil and Shell. ExxonMobil's second-quarter net profit tripled, while Shell's second-quarter profit hit a record high.
According to data released by the Saudi National Bureau of Statistics on July 31st, the country's GDP grew by 11.8% in the second quarter of 2022 compared with the same period last year.
The latest report released by the International Monetary Fund (IMF) on July 26th shows that Saudi Arabia's economic growth forecast for 2022 remains unchanged at 7.6%, which ranks first among the world's major economies.
Because of the turbulent international situation, the supply and prices of many international bulk aluminum oxide are still very uncertain.
Lithium battery diaphragm coating material:
High purity nano alumina is applied to the positive and negative diaphragm of lithium battery as a ceramic coating, which plays the role of heat resistance, high temperature resistance and insulation, so as to prevent the power battery from short circuit due to high temperature and diaphragm melting.
Additives for cathode materials of lithium batteries:
High purity nano-alumina doped with lithium cobalt and lithium manganate can improve thermal stability, cycle performance and overcharge resistance, inhibit the formation of oxygen and the decomposition of LiPF6, avoid direct contact between LiCo02 and electrolyte, reduce the loss of electrochemical specific capacity, and improve the electrochemical specific capacity of LiCoO2.
High purity γ-type nano-alumina is a porous substance with an internal surface area of hundreds of square meters per gram, high activity and strong adsorption capacity. It is a commonly used adsorbent, catalyst and catalyst carrier in petroleum refining and petrochemical industry; it is a deacidizing agent for transformer oil and turbine oil in industry, and it is also used for chromatographic analysis; it is a neutral and strong desiccant in the laboratory, its drying ability is no less than that of phosphorus pentoxide, and it can be regenerated and reused after heating below 175 ℃ for 6-8 hours.
Powder coating anti-caking:
In summer, nano-alumina can effectively prevent powder coating caking. Nanometer aluminum trioxide used in powder coatings can improve the fluffiness of powder coatings and have good anti-caking effect. It has good storability for powder coatings used in high temperature and high humidity environment.
Coating, rubber, plastic wear-resistant and hardening agent:
Adding 5-20% nano-alumina, the coating can greatly improve the wear resistance and scratch resistance of the coating, which is 2-5 times higher than that of the traditional coating. After nano-alumina is added to the paint, a very fine, uniform and hard network structure can be formed on the paint surface, which protects the polymer paint layer from damage. the scratch resistance of nano-paint is 3 times higher than that of the original paint. it is widely used in automobile paint and so on. The addition of nano-aluminum trioxide can significantly improve the hardness of the coating, and about 20% can reach 6-7H. The transparency of the coating is not affected.
Plastic, rubber, adhesive, paint thermal conductivity:
Alumina single crystal thermal conductivity of 30, nanometer alumina, high thermal conductivity, large spherical filling. In order to improve the compatibility of resin matrix and fillers, improve the thermal conductivity of matrix materials and not reduce its mechanical properties, surface treatment agents such as coupling agents are commonly used to improve the thermal conductivity.
Nano alumina has high purity, uniform particle size and good dispersion. When about 10% alumina is added to the sintered ceramics, the forming pressure increases, which can reduce the number of pores, thus increase the density of the ceramic blank, improve the density and mechanical properties of the sintered alumina ceramics, and reduce the sintering temperature more effectively.
Nano alumina for metallurgy has small particle size, large specific surface area and high activity, adding 1-3% nano-alumina to prevent matrix densification and grain size, enhance hardness, enhance electrical conductivity and mechanical properties, and improve melting point and high temperature resistance.
Alumina particles are uniform, have high sphericity, and are precision polishing powder, is a good material for metallographic polishing, but also suitable for stainless steel mirror polishing, titanium polishing, cast iron polishing, aluminum mirror polishing, stone mirror polishing, paint polishing, resin polishing, PCB circuit board polishing, glass polishing, optical glass, glasses lens polishing, resin lens polishing, sapphire polishing, LED polishing, germanium polishing. Zinc polishing, fast polishing, good brightness, no scratches.
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