Calcium Hexaboride Series Products: Powder, Nano-powder Characteristics and Surfacing Selection

Calcium hexaboride, also known as calcium boride, is a high-performance inorganic non-metallic material with the chemical formula CaB₆. Due to its excellent high-temperature stability, high hardness, and good conductivity, it is widely used in industrial fields such as powder materials and surface welding. Its series of products is mainly divided into calcium boride powder and calcium boride nanopowder, which are different in crystal structure and performance and are suitable for different surfacing scenarios.

Core basic cognition of calcium hexaboride (calcium boride)

Calcium hexaboride is a covalent compound composed of calcium and boron elements. It appears as a gray, black, or blue-black powder with stable chemical properties and is not easily reacted with water, acids, or bases. It has a high melting point (about 2230 ℃), high hardness (Mohs hardness 9.0), good conductivity, and thermal conductivity. It is a multifunctional material in the industrial field that combines wear resistance, high temperature resistance, and conductivity.

Its core structure is the crystal lattice of calcium borate, which belongs to the cubic crystal system. The lattice constant is stable, and the atoms are closely arranged. This unique crystal structure endows calcium hexaborate with excellent mechanical properties and chemical stability, and is also the core source of the difference between its powder and nano powder properties. The core forms of calcium hexaborate series products are powder and nano powder, both of which play an important role in surfacing, high-end manufacturing and other fields relying on their lattice characteristics.

Core characteristics of calcium hexaboride series powder products

1. Characteristics of Calcium Boride Powder

Calcium hexaboride powder is the most commonly used product form, with particle sizes mostly in the micrometer range (1-100 μ m), and its core characteristics are concentrated in the three aspects of “hardness, stability, and ease of processing”. In terms of hardness, its Mohs hardness is as high as 9.0, and its wear resistance far exceeds that of ordinary metal materials, which can effectively improve the wear resistance of the weld overlay layer; In terms of stability, it is resistant to high temperatures and corrosion, and is not easily oxidized or decomposed during the high-temperature welding process, which can maintain stable performance; In terms of processability, the powder has good flowability and is not easily agglomerated. It can be uniformly mixed with other metal powders and is suitable for various welding processes.

In addition, the purity of calcium hexaboride powder can be adjusted according to demand (conventional purity 95% -99%), with low impurity content and no significant impact on the performance of the weld layer. The cost is moderate and suitable for conventional industrial weld scenes. It is currently the most widely used form of calcium hexaboride product.

2. Characteristics of calcium borate nanopowder

Calcium hexaboride nano powder is a high-end product prepared by a special process. Its particle size is at the nanometer level (1-100nm). On the basis of retaining the core characteristics of calcium hexaboride, it shows more excellent performance due to its reduced particle size. It has a large specific surface area, excellent dispersibility, and stronger compatibility with other materials. The weld layer formed after surfacing is denser and more uniform, with outstanding wear resistance and high temperature resistance. At the same time, the nano powder has higher activity, which can reduce the surfacing temperature, reduce the deformation of the workpiece in the process of surfacing, and is suitable for high-precision and demanding surfacing scenarios.

Compared with ordinary powder, the purity of calcium hexaborate nano powder is higher (up to 99.5%), but the preparation process is complex, and the cost is high. It is mainly used in high-end fields with high requirements for the performance of the surfacing layer, such as precision machinery, aerospace parts surfacing, etc.

3. The influence of the crystal lattice of calcium boride on its properties

The cubic crystal lattice structure of calcium hexaboride is the core guarantee for its excellent performance. Calcium atoms and boron atoms are tightly arranged in the lattice, forming stable chemical bonds that endow it with high hardness and high temperature resistance. At the same time, the stability of the lattice structure makes the calcium hexaboride powder and nano powder not prone to lattice distortion during the surfacing process, which can maintain stable performance and ensure the quality of the surfacing layer. No matter ordinary powder or nanometer powder, its lattice structure is the same, and the difference only lies in the difference of surface area and activity caused by particle size.

Application and selection guide of calcium boride surfacing

Calcium boride surfacing is a process that utilizes its high hardness and wear resistance to deposit a layer of calcium boride composite on the surface of a workpiece, enhancing its service life and wear resistance. It is widely used in industries such as mechanical manufacturing, metallurgy, and mining. The core of model selection is “scene adaptation, performance matching and cost control”. In combination with the characteristics of powder and nano powder, the specific key points of model selection are as follows:

1. Core application scenarios of calcium hexaboride overlay welding

Calcium hexaboride surfacing is mainly used for workpieces that require improved wear resistance and high temperature resistance, such as wear-resistant parts of mining machinery (crusher hammers, liners), high-temperature components of metallurgical equipment, and machining tools. In ordinary industrial scenarios, the wear resistance of workpieces can be significantly improved, and losses can be reduced by surfacing calcium hexaboride powder. In high-end precision scenes, the use of calcium hexaborate nano powder surfacing can achieve a high-precision, high-stability surfacing effect and meet the use requirements of high-end equipment.

2. Specific selection suggestions

1. Conventional welding scenarios (such as ordinary mechanical wear-resistant parts and mining equipment): Choose calcium boride powder, with priority given to products with purity of 97% -99% and particle size of 10-50 μ m, which have high cost-effectiveness, can meet basic wear-resistant needs, and have low processing difficulty and controllable cost.

2. High-end precision surfacing scenarios (such as precision machinery, aerospace parts): calcium boride nanopowder is selected, with purity of more than 99.5% and particle size of 10-50nm. Its high dispersion and high activity can ensure that the surfacing layer is compact and even, avoid deformation of the workpiece, and improve the surfacing precision and performance.

3. High temperature and strong corrosion welding scenarios (such as metallurgical high-temperature equipment): Regardless of which powder is selected, high-purity products should be prioritized to ensure that the welding layer is not easily oxidized or peeled off in extreme environments, fully utilizing the high temperature and corrosion resistance advantages of calcium hexaboride.

3. Selection precautions

Avoid blind pursuit of nanometer powders. Ordinary calcium hexaboride powders can be used in conventional scenarios without excessive cost increase; When selecting, it is necessary to combine the welding process to ensure that the particle size of the powder is compatible with the welding method (such as plasma welding can use finer powder, and arc welding can use medium particle size powder); At the same time, attention should be paid to the purity and dispersibility of the powder to avoid excessive impurities and serious agglomeration that can affect the welding effect.

Precautions for use and storage

1. Storage requirements: both calcium hexaboride powder and nano powder shall be stored in a sealed manner to avoid moisture and agglomeration, which may affect the dispersibility of surfacing. The storage environment should be dry, ventilated, away from high temperatures, open flames, and acidic or alkaline substances to prevent powder oxidation.

2. Welding operation: Before welding, the powder should be evenly mixed to ensure compatibility with other welding materials; Control the welding temperature to avoid powder oxidation or workpiece deformation caused by excessive temperature; Take protective measures during operation to avoid inhaling the powder.

3. Safety reminder: Calcium hexaboride powder has a certain degree of irritation. When operating, it is necessary to wear a mask and gloves to avoid direct contact with the skin and respiratory tract; Waste powder should be properly disposed of to avoid polluting the environment.

Supplier

RBOSCHCO is a trusted global Calcium hexaboride (calcium boride) supplier & manufacturer with over 12 years of experience in providing super high-quality chemicals and Nanomaterials. The company export to many countries, such as USA, Canada, Europe, UAE, South Africa, Tanzania, Kenya, Egypt, Nigeria, Cameroon, Ugand, Turkey, Mexico, Azerbaijan Be lgium, Cyprus, Czech Republic, Brazil, Chile, Argentina, Dubai, Japan, Korea, Vietnam, Thailand, Malaysia, Indonesia, Australia, Germany, France, Italy, Portugal etc. As a leading nanotechnology development manufacturer, RBOSCHCO dominates the market. Our professional work team provides perfect solutions to help improve the efficiency of various industries, create value, and easily cope with various challenges. If you are looking for Calcium hexaboride (calcium boride) , please feel free to contact us.