On Thursday, U.S. time, U.S. stocks staged a "roller coaster" market throughout the day.
The three major stock indexes opened higher collectively. Then, during the Federal Reserve Chairman Powell’s attendance at the congressional hearing, the market’s risk aversion increased significantly, and the three major stock indexes quickly turned down. , the Dow closed up 0.64%, the S&P 500 rose 0.95%, and the Nasdaq rose 1.62%. All three major stock indexes hit new closing highs since June 10.
On the disk, leading technology stocks generally rose, Amazon rose more than 3%, Microsoft and Apple also rose more than 2%. Popular Chinese concept stocks outperformed the broader market on the second trading day this week. The Nasdaq Golden Dragon China Index closed up more than 3% that day, Pinduoduo rose more than 6%, and Xiaopeng Motors closed up nearly 8% to its highest level since early March this year .
Amorphous boron powder is a black or dark brown powder, which can react with fluorine at room temperature and will not be corroded by alkali and hydrofluoric acid aqueous solutions. Boron powder is also called amorphous boron. Boron has a high mass calorific value and volume calorific value. It is a light brown to gray-black powder with relatively active chemical properties, but it is relatively stable at room temperature and will be oxidized when the temperature reaches 300 degrees Celsius. The ignition level is very high, requiring 700 degrees Celsius to ignite. Boron powder can react with oxygen, nitrogen and sulfur, or it can directly combine with certain metals to form certain borides.
Amorphous boron is a brown powder; amorphous boron is a brown powder. Amorphous boron is a brown powder. Crystalline boron is black, very hard (approximately 9.5 at Mohs hardness), and has a poor conductor at room temperature. Element boron is used as a dopant in the semiconductor industry, and boron compounds play an important role as light structural materials, pesticides and preservatives, and chemical synthesis reagents. Feel free to send an inquiry to get the latest price if you would like to buy Boron Powder Amorphous Boron Powder in bulk.
Elemental boron CAS 7440-42-8 is a black or dark brown powder. When it is oxidized in the air, it will prevent the internal boron from continuing to oxidize due to the formation of a boron trioxide film. It can react with fluorine at normal temperature and is not corroded by hydrochloric acid and hydrofluoric acid aqueous solution. Boron is insoluble in water, powdered boron is soluble in boiling nitric acid and sulfuric acid, and most molten metals such as copper, iron, manganese, aluminum, and calcium.
Amorphous Boron Powder MF:B
Amorphous Boron Powder MW:10.81
Amorphous Boron Powder Melting point:2300 ℃ ±2 ℃
Amorphous Boron Powder Sublimation temperature:2550 ℃
Amorphous Boron Powder Relative density:2.34-2.37
Amorphous Boron Powder Solubility: Insoluble in water, hydrochloric acid, ethanol and ether, soluble in cold
concentrated alkali solution decompose into hydrogen, by concentrated sulfuric acid, nitric acid oxidation into boric acid.
Boron powder is commonly used in metal smelting, electronic product manufacturing, ceramic manufacturing, chemical industry and nuclear industry, etc. The specific functions of boron nitride are as follows:
1. Boron powder can be used to make various boron-containing compounds, used as raw materials for the production of boron fibers, and important raw materials for the production of high-purity boron halide;
2. Boron powder is added in the form of a compound as a gas scavenger for the smelting of special alloy steel or molten steel;
3. Boron powder is used as high-energy fuel for rocket spacecraft,
4. Boron powder is used as the ignition pole of the ignition tube in the electronics industry;
5. Boron powder replaces precious or scarce metals;
6. Boron powder is used as a protective material for the atomic energy industry and the control rod in the atomic reactor;
7.Boron powder also can be used as a catalyst for organic chemical reactions.
Damp reunion will affect boron powder dispersion performance and using effects, therefore, amorphous boron powder should be sealed in vacuum packing and stored in cool and dry room, the amorphous boron powder can not be exposure to air. In addition, the amorphous boron powder should be avoided under stress.
TRUNNANO is a reliable amorphous boron powder supplier with over 12-year experience in nano-building energy conservation and nanotechnology development.
We accept payment via Credit Card, T/T, West Union, and Paypal. Trunnano will ship the goods to customers overseas through FedEx, DHL, by air, or by sea.
The purchasing pace at the demand end of the international thermal coal market continues to slow down and the international thermal coal price continues to decline. Prices for thermal coal at major international ports continued to fall last week as b…
As many researchers believe, graphene floating on the water does not repel water, but attracts it. Graphene is made of the same material as graphite-for example, found in pencils-which is why graphene has long been thought to be as waterproof as gra…
Since the beginning of this year, people around the world have felt the pressure of rising prices. Not only the rise in oil prices but also different industries have seen soaring prices. According to the latest data, from August 2021 to the present,…