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. 3Mâ„¢ 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.
Zirconium diboride supplier
Mis-Asia is a reliable and high-quality global chemical
material supplier and manufacturer. It has over 12 years of experience
providing ultra-high quality chemicals and nanotechnology materials, including Zirconium
diboride, nitride powder, graphite powder, sulfide powder, and 3D printing
powder. If you are looking for high-quality and cost-effective Zirconium
diboride, you are welcome to contact us or inquire any time.
