What is Zirconium diboride? ZrB2 is well-known in the Ultra-High Temperature Ceramics class. The distinctive features of this class of materials make them good selections for use in various applications such as hypersonic flights, atmospheric re-entry vehicles, and rocket propulsion systems. Zirconium diboride has attracted much attention because of its superior oxidation resistance, which is a consequence of the stability of ZrO2 formed on these materials at high temperatures in oxidizing atmospheres.
Monolithic ZrB2 ceramics Moreover, since an oxide layer on the powder surface inhibits its high-temperature densification progress, sintering aids such as B4C and carbon are usually required. On the other hand, previous researchers used polyethyleneimine (PEI) to disperse monolithic ZrB2 effectively. PEI was reported in several studies to be an appropriate dispersant for SiC and B4C powders. However, until now, the aqueous co-dispersion behavior of a ZrB2–SiC–B4C–C (ZSBC) powder system has rarely been reported, which is crucial to the subsequent consolidation process. In the present work, the properties of ZSBC suspension are investigated in terms of surface charge, adsorption, and rheological behavior to obtain a well-co-dispersed suspension.
ZrB2 slurries The zeta potential of ZrB2 slurries. The isoelectric point (IEP) of ZrB2 was ~4.5, which was close to the previously reported values of ~4.7. The surface charge of ZrB2 was negative when pH was higher than the IEP. However, the IEP of ZrB2 shifted towards a basic region in the presence of PEI. This is due to the fact that PEI ionizes in the acid condition, carries a positive charge, and adsorbs onto the particle surface via electrostatic force (hydrogen bonding is proposed to be the dominant mechanism). The dispersion of ZrB2 in the water could be attributed to the surface oxide layer, which earlier researchers illustrated. In the current work, not only ZrB2 but also other powders were concerned since the co-dispersion behavior of ZrB2, SiC, B4C, and C is critical to obtain green bodies with chemical homogeneity. The zeta potentials of ZrB2, SiC, B4C, and C powders in the presence of PEI. The maximum absolute zeta potential values appeared in the acidic condition (all >30 mV at pH ≈ 3), which manifested the best co-dispersion status. It is worth noting that previous researchers have already reported the surface chemistry and dispersion behavior of PEI onto SiC powder and that they believed that an acid solution was the best dispersing medium. Thus the ZSBC powders can be well co-dispersed in an acidic solution in the presence of PEI.
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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