Product Name: Calcium Hexaborate (CaB6) 
Specification: 0.8-10um (D50) 
Appearance: Irregular 
Color: Black Grey 
Features: high melting point, high strength, excellent conductivity and electromagnetic radiation resistance, low electronic work function, constant specific resistance 
Application: Refractory additive, deoxidizer and deaerator, nuclear industry application, spintronics components, raw material manufacturing, boron alloy cast iron treatment and other fields

Calcium boride 
Molecular formula: CaB6 
CAS number: 12007-99-7 
Appearance: Black gray powder 
Density: 2.33g/cm3 
Melting point: 2230 ℃ 
Calcium hexaboride (also known as calcium boride) is a compound of calcium and boron, with the chemical formula CaB6. It has excellent conductivity, high hardness, chemical stability, and high melting point. It is a gray black solid, glossy, inactive powder with low density. It has a typical cubic structure of metal borides, consisting of octahedral units of 6 boron atoms combined with calcium atoms. Both CaB6 and La doped CaB6 exhibit weak ferromagnetism, No. 12007-99-7, with a microhardness of 27GPa. The relative density is 2.33, the melting point is 2200 ℃, the Knoop hardness is 2600kg/mm2, the Young's modulus is 379GPa, and the pure crystal resistivity is greater than 2.1010 Ω· m. CaB6 is a semiconductor with an energy gap of approximately 1.0 electron volt. It is stable at high temperatures in the air, insoluble in hydrochloric acid and dilute sulfuric acid, does not react with water, and can be corroded by strong oxidants such as chlorine, fluorine, nitric acid, and hydrogen peroxide. It reacts slowly with alkali. 
Usage: Used as a boron containing additive for anti-oxidation, erosion resistance, and improving thermal strength of dolomite and magnesium dolomite refractory materials. Used as a deoxidizer to improve the conductivity and strength of high conductivity copper. A new type of material used for neutron protection in the nuclear industry. A novel semiconductor material used in spin electron components with a temperature of 900K. Used as a raw material for manufacturing boron trichloride (BC13) and amorphous boron. Used as a raw material for manufacturing high-purity metal borides (TiB2, ZrB2, HfB2, etc.) and high-purity boron alloys (Ni-B, Co-B, Cu-B, etc.). Used for desulfurization, deoxygenation, and boron addition in alloy cast iron 
Agent. Used as a desulfurization, deoxygenation, and boron enhancing agent for boron steel, as well as a deoxidizer for metal melting. 
Structural information: The crystal structure of calcium hexaboride is a cubic lattice, with calcium at the center of the cell and a three-dimensional boron network formed by tightly regular octahedra of boron atoms connected by boron boron bonds at the vertices. Each calcium has 24 nearest neighbor boron atoms. Calcium atoms are arranged in a simple cubic stack, so there are holes between the eight calcium atoms located at the vertices of the cube. Another way to describe calcium hexaboride by introducing octahedral B6 groups to expand a simple cubic structure, which is filled with calcium and hexaboride groups, is through the CsCl type structure with a metal B6 2-octahedral polymeric anion, where calcium atoms occupy the Cs site and B6 octahedra occupy the Cl site. The Ca-B bond length is 3.05 Å, and the BB bond length is 1.7 Å. 
The nuclear magnetic resonance NMR data of 43Ca contains a -56.0 ppm δ peak and a -41.3 ppm δ peak, with the maximum peak width of the δ peak being 0.85, and the negative shift being due to the high coordination number.   
Raman data: Due to the activity modes of A1g, Eg, and T2g, calcium boride exhibits three Raman peaks at 754.3, 1121.8, and 1246.9 cm-1.   
Attribute: CaB6 has been studied for its various special physical properties, such as superconductivity, valence state fluctuations, and Kondo effect. However, the most notable characteristic of CaB6 is its ferromagnetism. It unexpectedly appeared at high temperatures (600 K) and low magnetic moments. The source of this high-temperature ferromagnetism is the connection between the ferromagnetic phase of the diluted electron gas and the assumed exciton state in calcium boride or external impurities on the sample surface. Impurities may include iron and nickel, which may come from boron used to prepare the sample. 
Preparation method: Mix calcium oxide and boron powder evenly and dry them, then place them in a high-temperature reaction furnace; Vacuum treatment shall be carried out before heating treatment in the high-temperature reactor; Under vacuum and inert gas protection conditions, react calcium oxide and boron powder at high temperatures; Separate and purify calcium hexaboride ceramic powder; The separated and purified calcium hexaboride ceramic powder is ball milled to obtain uniformly dispersed calcium hexaboride ceramic powder. The method of the present invention is simple, easy to implement, and has low manufacturing costs. The prepared calcium hexaboride ceramic powder particles are small and evenly dispersed. 
Typical application products: 
◆ Used as a boron containing additive for anti-oxidation, erosion resistance, and improving thermal strength of dolomite and magnesium dolomite refractory materials. CaB6 can improve the strength and bulk density of castables after treatment at various temperature ranges 
CaB6 can promote the high temperature densification of castables, enabling them to obtain better oxidation resistance, high temperature flexural strength, and corrosion resistance. CaB6 can significantly improve various properties of iron hook castables. When 0.5% calcium boride is added, the castable has good comprehensive performance. 
◆ Used as a deoxidizer to improve the conductivity and strength of high conductivity copper. 
A new type of material used for neutron protection in the nuclear industry. 
A new semiconductor material used in spin electron components with a temperature of 900K. CaB6 has excellent conductivity and low work function, making it suitable as a hot cathode material. 
Used as a raw material for manufacturing boron trichloride (BCl3) and amorphous boron. 
◆ Used as a raw material for manufacturing high-purity metal borides (TiB2, ZrB2, HfB2, etc.) and high-purity boron alloys (Ni-B, Co-B, Cu-B, etc.). Prepare other borides such as hexagonal boron nitride and superconducting MgB2 using CaB6 as raw material. 
◆ Used for manufacturing a mixture of catalyst containing calcium boron nitride (Ca3B2N4) and hexagonal boron nitride to produce high-performance crystalline cubic boron nitride. 
◆ Used as a desulfurization, deoxygenation, and boron enhancing agent for boron alloy cast iron. 
◆ Used as a desulfurization, deoxygenation, and boron enhancing agent for boron steel. 
◆ Used as a deoxidizer for metal melting and an excellent deoxidizer for oxygen free copper, the comparative test results show that the deoxidizing ability of calcium hexaboride deoxidizer is higher than that of copper boron alloy and phosphorus copper, and it has a purifying effect on copper liquid, a strengthening effect on copper matrix, and no pollution to copper liquid. When the amount of calcium hexaboride added is greater than 0.60%, the oxygen content of copper liquid can be reduced to<20 × 10-6, reaching the domestic first-class oxygen free copper standard. Calcium hexaboride has little effect on the conductivity of copper. Within the range of calcium hexaboride addition (0.69%~1.12%), the relative conductivity of copper is in the range of 88%~91.6%. As the amount of calcium hexaboride added increases, the tensile strength of copper continues to improve, with elongation first increasing and then decreasing, reaching its maximum value at a calcium hexaboride addition of 0.88%. 
Micro powder and additives for engineering ceramics 
The application of CaB6 as a special ceramic and special ceramic additive: CaB6 can be used as an additive in the sintering process of certain borides and carbides ceramics, which can improve the physical and chemical properties of ceramics. For example, using ultrafine TiB2 as the matrix and adding CaB6 as the second phase, after hot pressing, the dissolution of Ca prevents the growth of grains, making this type of material have extremely high microhardness and bending strength. Calcium hexaboride has excellent properties such as high melting point, hardness, strength, chemical stability, good electromagnetic performance, and strong neutron absorption ability, making it widely used in refractory and wear-resistant materials, composite materials, ceramic materials, semiconductor materials, and nuclear control materials. Coating additives and aluminum magnesium alloys with CaB6 added. 
Calcium boride is used in the production of boron alloy steel and as a deoxidizer for the production of oxygen free copper. The latter has higher conductivity than conventional phosphorus deoxidized copper due to the low solubility of boron in copper. CaB6 can also be used as a high-temperature material, surface protection, abrasive, tool, and wear-resistant material. 
CaB6 is also a promising candidate for n-type thermoelectric materials, as its power factor is not lower than that of ordinary thermoelectric materials Bi2Te3 and PbTe. 
Caution: Calcium boride is irritating to the eyes, skin, and respiratory system. Appropriate protective goggles and clothing should be used when handling this product. Do not pour calcium boride into the drainage pipe or add water to it.