Boron Isotopes ¹⁰B ¹¹B

Boron, a chemical element with the symbol B and atomic number 5, is a black/brown hard solid amorphous powder. It is highly reactive and soluble in concentrated nitric and sulfuric acids but insoluble in water, alcohol and ether. It has a high neutro absorption capacity.UrbanMines specializes in producing high purity Boron Powder with the smallest possible average grain sizes. Our standard powder particle sizes average in the range of – 300 mesh, 1 microns and 50~80nm. We can also provide many materials in the nanoscale range. Other shapes are available by request.

Boron Carbide (B4C), also known as black diamond, with a Vickers hardness of >30 GPa, is the third hardest material after diamond and cubic boron nitride. Boron carbide has high cross section for absorption of neutrons (i.e. good shielding properties against neutrons), stability to ionizing radiation and most chemicals. It is a suitable material for many high performance applications due to its attractive combination of properties. Its outstanding hardness makes it a suitable abrasive powder for lapping, polishing and water jet cutting of metals and ceramics. Boron Carbide is an essential material with lightweight and great mechanical strength. UrbanMines’ products have high purity and competitive prices. We also has much experience in supplying a range of B4C products. Hope we can offer helpful advice and give you a better understanding of boron carbide and its various uses.

Niobium Powder (CAS No. 7440-03-1) is light grey with a high melting point and anti-corrosion. It takes on a bluish tint when exposed to air at room temperatures for extended periods. Niobium is a rare, soft, malleable, ductile, gray-white metal. It has a body-centered cubic crystalline structure and in its physical and chemical properties it resembles tantalum. The metal’s oxidation in air commences at 200°C. Niobium, when used in alloying, improves strength. Its superconductive properties are enhanced when combined with zirconium. Niobium micron powder finds itself in various applications such as electronics, alloy-making, and medical due to its desirable chemical, electrical, and mechanical properties.

UrbanMines produce and process pyrite products by flotation of primary ore, which is high quality ore crystal with high purity and very little impurity content. In addition, we mill the high quality pyrite ore into powder or other required size, so as to guarantee the purity of sulphur, few harmful impurity, demanded particle size and dryness.Pyrite Products are widely used as resulfurization for free cutting steel smelting and casting furnace charge, grinding wheel abrasive filler, soil conditioner, heavy metal waste water treatment absorbent, cored wires filling material, lithium battery cathode material and other industries. Ratification and favourable comment having got users globally.

Boron has two stable natural isotopes: ¹⁰B and ¹¹B. They are chemically identical, with essentially the same valence, chemical reactivity, coordination ability, bonding characteristics, and chemical behavior in all types of compounds, making them indistinguishable under ordinary chemical conditions. They differ significantly only in atomic mass, nuclear physical properties, and minor thermodynamic physical parameters due to the different number of neutrons in their nuclei. ¹⁰B has a smaller atomic mass, an extremely high thermal neutron absorption cross‑section, and strong neutron capture capability. Its activation products after nuclear reaction are minimal, with no long‑lived radioactive residues. Observable isotopic effects exist compared with ¹¹B in minor thermodynamic properties such as vapor pressure and diffusion rate. ¹¹B has a larger atomic mass and an extremely low thermal neutron absorption cross‑section, making it nearly neutron‑transparent. It exhibits very low activation in radiation environments and excellent irradiation resistance. It is also more nuclear‑inert, with less performance degradation of its physicochemical structure under intense neutron irradiation. Except for isotopic mass and nuclear physical characteristics, its other macroscopic physical and chemical properties are highly consistent with those of ¹⁰B.