Experimental Procedure of Zirconium diboride

What is Zirconium diboride?

Zirconium diboride (ZrB2) is an ultra-high-temperature ceramic powder. With good high-temperature strength, it is used in the aerospace industry for hypersonic flight or rocket propulsion. ZrB2 parts are hot pressed and machined into the required shape. This antioxidant is commonly used to protect carbon-containing components and extend refractory components' service lifetimes. 3M™ Zirconium Diboride (ZrB2) is a ceramic-based antioxidant engineered to provide superior protection against aggressive alloys. Zirconium diboride ZrB2 possesses a complex of unique physical and mechanical properties: high melting point, thermal conductivity, hardness, abrasion resistance, and resistance to aggressive environments. Zirconium diboride (ZrB2) is a transition metal boride (TMB) that belongs to the class of ultra-high-temperature ceramics. ZrB2 has a P6/mmm hexagonal crystal structure like several transition metal diborides. Covalent bonds, TM-TM metallic bonds, and TM-B ionic and covalent bonds.

Special features of preparation of nanosized zirconium diboride powders of various dispersity

Products of the zirconium powder reaction with amorphous boron in a Na2B4O7 ionic melt at 650–850°C and those of the ZrCl4 reaction with NaBH4 at 300–725°C have been studied using X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy, thermogravimetry, and elemental analysis. At temperature ≥750°C, single-phase ZrB2 with a particle size of 60–80 nm is formed in a Na2B4O7 ionic melt, whereas the ZrB2 powder obtained via the reaction of ZrCl4 with NaBH4 at temperature ≥575°C consists of particles differing in shape, some of which are close to spherical with a diameter of 10–35 nm.

Experimental Procedure of Zirconium diboride

Commercially available ZrB2 powder (Dandong Chemical Co. Ltd., Dandong, China, the average particle size was 2.5 μm, multilateral shape, and the specific area was 5.24 m2·g−1), α-SiC powder (FCP 15C, SIKA TECH., Lillesand, Norway, multilateral shape, with a purity of >99% and an average particle size of <0.5 μm), B4C powder (Mudanjiang Jingangzuan Boron Carbide Co. Ltd., Mudanjiang, China, multilateral shape, and the average particle size was <1 μm). Water-soluble carbon black (Shanghai Yingchang Chemical Co. Ltd., Shanghai, China, spherical shape, and the average particle size was <1 μm) was used as raw materials. PEI (30 wt % aqueous solution, TCI, P0381) was selected as a dispersant. ZrB2 powder was attrition milled (Model 01-HD, Union Process Precision Machinery Co. Ltd., Qingdao, China) at 300 rpm for two h in ethanol medium in a Teflon-coated tank using cobalt-bonded WC media and a cobalt-bonded WC spindle. The particle size was refined to 0.32 μm after milling. To remove surface oxide impurity, ZrB2 was washed with a hydrochloric acid solution (1:1 in weight ratio) and freeze dried (FD-1A-50, Beijing Boyikang Experimental Instrument Co. Ltd., Beijing, China). The aqueous slurries were prepared as follows: ZrB2, SiC, B4C, and C powders, together with PEI (all contents were based on the weight percentages of dry powders), were dispersed into water, and then stirred at 400 rpm for one h.

Price of Zirconium diboride

Zirconium diboride particle size and purity will affect the product's Price, and the purchase volume can also affect the cost of Zirconium diboride. A large amount of large amount will be lower. The Price of Zirconium diboride is on our company's official website.

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