Stability of boron powder


Soluble in cold concentrated alkali solution and decomposes hydrogen gas. It can be oxidized to boric acid by concentrated nitric acid, sulfuric acid, and aqua regia. The chemical properties are relatively active. Stable in air and at average temperature, heating to 300 is oxidized, 700 is on fire. The flame is red when it burns, and the love is green when it is slightly vaporized. It can interact with oxygen, nitrogen, sulfur, halogen, and carbon at high temperatures. It can be directly combined with many metals to form metal borides. Reactions with organic compounds can produce -b-C - or -b-o-C - compounds. Avoid contact with moist air, strong oxidants, strong acids, water, and philosophy. At a specific temperature, it is not affected by water, bromine, and chlorine. Freshly prepared, unburned, soluble in hot nitric acid, sulfuric acid, and molten metals, such as iron, magnesium, and aluminum, insoluble in water. Low conductivity at room temperature, high conductivity at high temperature, and doping trace carbon can increase the conductivity. Explosive in contact with hydrogen iodide. The hardness of the crystals is diamond-like. A low ratio (hardness/mass), harder than copper, lighter weight, 25% lighter than aluminum. Good high-temperature resistance. Ten times as rigid as fiberglass. Boron fibers have high elastic modulus, tensile strength, and heat resistance. The tensile strength is about 3500MPa, with Elastic modulus 400GPa, Only a quarter of the density of steel. Good compression resistance and high-temperature performance. Its power in 500 air is almost the same as at room temperature but can withstand higher temperatures in inert gases. It is a good reinforcement material and can be combined with metal, plastic, or ceramic to make high-temperature structural composites. Boron can be fused using boron nitride or zirconia containers, but boron powder is usually sintered into a rod and fused using floating zone melting. Usually, you get amorphous Boron. Above 1550, halide reduction to produce cubic crystal boron, 1100 ~ 1500 to produce β-rhombohedral crystal boron, 800 ~ 1000 to produce α-Rhombohedral crystal boron. Amorphous Boron is prepared below 800. If you are looking for high quality, high purity and cost-effective boron powder, or if you require the latest price of boron powder, please feel free to email contact mis-asia.


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