Research in the area of obtaining of activated alumina. Part  7. Production of reactive alumina with controlled particle size distribution

M. A. Trubitsyn; N. A. Volovicheva; V. V. Lisnyak

doi:10.17073/1683-4518-2024-7-34-42

Research in the area of obtaining of activated alumina. Part 7. Production of reactive alumina with controlled particle size distribution

M. A. Trubitsyn, N. A. Volovicheva, V. V. Lisnyak

https://doi.org/10.17073/1683-4518-2024-7-34-42

Full Text:

Abstract

The key technological factors determining the formation of granulometric composition of highly dispersed alpha-alumina powders in the process of thermal treatment of feedstock have been researched. The decisive inﬂuence of temperature modes of synthesis and concentration of Cr2O3 additive on phase transformations and structural and morphological characteristics of reactive alumina is shown. The fact of formation of thermodynamically stable primary crystals of alpha aluminum oxide with a characteristic mode of 0.5 μm has been established for the ﬁrst time. Technological principles of thermal synthesis of reactive alpha-alumina with predictable particle size distribution have been developed.

Keywords

reactive alumina (RA), thermal synthesis, particle size distribution, mineralizing additives,

About the Authors

M. A. Trubitsyn

ФГАОУ ВО «Белгородский государственный национальный исследовательский университет»
Russian Federation

N. A. Volovicheva

ФГАОУ ВО «Белгородский государственный национальный исследовательский университет»
Russian Federation

V. V. Lisnyak

ФГАОУ ВО «Белгородский государственный национальный исследовательский университет»
Russian Federation

References

1. Wen, H. Growth characteristics of boehmite-derived ultraﬁne theta- and alpha-alumina particles during phase transformation / H. Wen, F. Yen // J. Cryst. Growth. ― 2000. ― Vol. 208, № 1‒4. ― P. 696‒708.

2. Chang, P. Examinations on the critical and primary crystallite sizes during θ- to α-phase transformation of ultraﬁne alumina powders / P. Chang, F. Yen, K. Cheng, H. Wen // J. Am. Chem. Soc. ― 2001. ― Vol. 1, № 5. ― P. 253‒261.

3. Trubitsyn, M. A. Research in the area of preparing activated alumina. Part 4. New technological approaches for synthesis of ultraﬁne α-Al2O3 / M. A. Trubitsyn, N. A. Volovicheva, L. V. Furda [et al.] // Refract. Ind. Ceram. ― 2023. ― Vol. 64, № 1. ― Р. 21‒26. https://doi.org/10.1007/s11148-023-00798-x.

4. Kim, H. S. Eﬀect of AlF3 seed concentrations and calcination temperatures on the crystal growth of hexagonally shaped α-alumina powders / H. S. Kim, N. Park, T. J. Lee, M. Kang // Ceram. Int. ― 2015. ― Vol. 40. ― P. 3813‒3818.

5. Zalapa-Garibay, M. A. Low temperature synthesis of alpha-alumina platelets and acicular mullite in MgO‒ Al2O3‒SiO2 system / M. A. Zalapa-Garibay, A. Arizmendi-Moraquecho, S. Y. Reyes-Lopez // J. Ceram. Sci. Technol. ― 2019. ― Vol. 10. ― № 1.― P. 9‒18.

6. Ya-Qiang, S. H. E. N. Inﬂuence mechanism of halide additives on phase conversion, morphology, and purity of alumina powders prepared by solid-phase calcination method / S. H. E. N. Ya-Qiang, L. I.. Dong-Yun [et al.] // Ceram. Int. ― 2022. ― № 48. ― P. 8403‒8408.

7. Kim, H. S. Rapid crystal phase transformation into hexagonally shapeda-alumina using AlF3 seeds / H. S. Kim, M. Kang // J. Sol-Gel Sci. Technol. ― 2013. ― № 68. ― P. 110‒120.

8. Okada, K. Eﬀect of divalent cation additives on the γ-Al2O3 to α-Al2O3 phase transition / K. Okada, A. Hattori, T. Taniguchi [et al.] // J. Am. Ceram. Soc. ― 2000. ― № 4. ― P. 928—932.

9. Nordahl, C. Scott. Thermal analysis of phase transformation kinetics in α-Al2O3 seeded boehmite and γ-Al2O3 / C. Scott Nordahl, Gary L. Messing // Thermochim. Acta. ― 1998. ― Vol. 318. ― P. 187‒199.

10. Nath, M. Recent research on Cr-containing refractory castables / M. Nath, N. Liao, T. Xu [et al.] // Refractories Worldforum. ― 2021. ― Vol. 13, № 2. ― P. 48‒57.

11. Zhao, P. Crystal structure and properties of Al2O3‒ Cr2O3 solid solutions with diﬀerent Cr2O3 contents / P. Zhao, H. Zhaoa, J. Yua, H. Zhang, H. Gao, Q. Chen // Ceram. Int. ― 2018. ― № 44. ― P. 1356‒1361.

12. Nath, M. Anomalous densiﬁcation behavior of Al2O3– Cr2O3 system / M. Nath, P. Kumar, A. V. Maldhure [et al.] // Mater. Charact. ― 2016. ― № 111. ― P. 8‒13.

13. Lyamkina, N. E. Inﬂuence of сhromium-containing Al2O3 nanopowders on structural modiﬁcations in aluminum oxide micropowders / N. E. Lyamkina, G. А. Chiganovа, А. S. Sokolovа // J. Sib. Fed. Univ. Ing. Tech. ― 2018. ― № 11(4). ― P. 453‒460.

14. Riu, D. Eﬀect of Cr2O3 addition on microstructural evolution and mechanical properties of Al2O3 / D. Riu, Y. Kong, H. Kim // J. Eur. Ceram. ― 2000. ― Vol. 10. ― P. 1475‒1481.

15. Трубицын, М. А. Исследование влияния технологических параметров на гранулометрические характеристики субмикронного оксида алюминия в α-форме / М. А. Трубицын, Н. А. Воловичева, Л. В. Фурда, Н. С. Скрыпников // Вестник БГТУ им. В. Г. Шухова. ― 2021. ― № 12. ― С. 84‒97.

Supplementary files

For citation: Trubitsyn M.A., Volovicheva N.A., Lisnyak V.V. Research in the area of obtaining of activated alumina. Part 7. Production of reactive alumina with controlled particle size distribution. NOVYE OGNEUPORY (NEW REFRACTORIES). 2024;(7):34-42. https://doi.org/10.17073/1683-4518-2024-7-34-42

Refbacks

There are currently no refbacks.

ISSN 1683-4518 (Print)

Username
Password