A novel comprehensive utilization of vanadium slag: As gamma ray shielding material

Cao²,

Dong³

et al. 2021

Preprint

Self Cite

Self-propagating high-temperature synthesis (SHS) process is used to prepare AlB12. The phase analysis results of preparing AlB12 with Al and B2O3 as raw materials show that: under air and argon conditions, the self-propagating and acid-washed self-propagating powders all have α-Al2O3 impurities; Mg, Al and B2O3 are used as raw materials. The phase analysis results of the preparation of AlB12 show that under argon conditions, the self-propagating and acid-washed self-propagating powder has unremovable MgAl2O4 impurities; the root cause of the low purity of AlB12 prepared by the self-propagating method is that there are unremovable impurities exist.

Section: Introductionmentioning

confidence: 99%

Preparation of AlB12 Powder by Self-Propagating High-Temperature Synthesis (SHS)

Cao²,

Dong³

et al. 2021

Preprint

Self Cite

“…One approach is the addition of metal that can improve its toughness and greatly increase its application range (12)(13)(14). Among other things, the composite material of boride, combined with plastic or aluminum, produces an effective neutron shielding material (15)(16)(17)(18)(19). Among them, titanium diboride (TiB2) not only has the properties of high melting point (20,21), high hardness (22)(23)(24), and good high-temperature mechanical properties (25,26), but it also has good oxidation resistance (27,28), strong resistance to chemical corrosion and molten metal corrosion (29,30), and can resist the corrosion of non-alkali molten salts (31)(32)(33)(34).…”

Section: Introductionmentioning

confidence: 99%

Research on Thermal Neutron Shielding Performance of TiB2-Al Composite Materials

Li²,

Dong³

et al. 2021

Preprint

Self Cite

Although the various excellent properties and preparation methods of TiB2-based composites have been extensively studied, their neutron shielding properties have not received as much attention. In this article, the neutron shielding performance of the previously prepared TiB2-Al composite will be studied. The photo neutron source device was used to carry out neutron irradiation tests on test samples with a thickness of 10 mm. The average thermal neutron shielding rate of TiB2-based boron-containing composites is 17.55%, and the shielding rate increases with the increase of BN content. The macroscopic cross-section of thermal neutrons of the composites generally shows a stable trend, and when the BN content is 10%, the thermal neutrons macroscopic cross section reaches the maximum value of 7.58cm-1. With the increase of the BN content, the thermal neutron fluence rate shows a gradually decreasing trend.

“…Metal borides are interstitial phase compounds, and their chemical bond composition is relatively complex (18,19). At the same time, they include one or more of MM metal bond, BB covalent bond and BM ionic bond.…”

Section: Introductionmentioning

confidence: 99%

Analysis on Electrolytic Behavior of Aluminium Dodecaboride/Alumina (AlB12/Al2O3) Composite Ceramic Powder

B²,

Dong³

et al. 2021

Preprint

Self Cite

Although the excellent properties of borides have attracted the attention of the industry, their limited preparation process and difficult-to-remove impurities have prevented them from exerting their full effectiveness. However, it is very difficult to separate AlB12 and Al2O3 prepared by self-propagating high temperature synthesis. This study is the first time to separate the two by electrolysis process and observe their electrolytic behavior. The results show that Al2O3 is converted into micron-sized aluminum during the electrolysis process, while AlB12 still exists intact. This result provides a novel idea for the future purification of borides containing Al2O3 impurities