Optimization of calcination temperature

Oct 13, 2025 by pynkocean.com 33 views

Analysis of Crystal Structure and Magnetic Properties of Strontium Ferrite (SrFe12O19) Powder in the Composition of Stoichiometry and Non-Stoichiometry

Introduction

The development of permanent magnetic materials has been a significant area of research in recent years, with applications in various fields such as electric motors, generators, and data storage devices. Strontium ferrite (SrFe12O19) is one type of permanent magnetic material that has gained attention due to its excellent magnetic properties. In this study, we aim to analyze the crystal structure and magnetic properties of SrFe12O19 powder made in the composition of stoichiometry and non-stoichiometry.

Background

Strontium hexaferit magnets are made using SRCl2 and FeCl3 raw materials. The synthesis process involves the coprecipitation method, followed by calcination at high temperatures. The crystal structure and magnetic properties of the resulting powder are then analyzed using X-Ray Diffractometer (XRD) and Vibrating Sample Magnetometer (VSM). In this study, we modified the composition of raw materials with stoichiometry ratios (1: 6) and non-stoichiometry ratios (1: 5.5 and 1: 6.5). The calcination process was carried out at 950 ° C and 1050 ° C for two hours.

Crystal Structure Analysis

The crystal structure of SrFe12O19 is a complex oxide with a hexagonal structure. The analysis of crystal structure using XRD helps in determining the existence and purity of the crystal phase. The results showed that the strontium hexaferit magnet with the best crystal structure and magnetic properties was produced from the stoichiometry ratio at a calcination temperature of 950 ° C. In this condition, the crystal structure tends to go to a single phase, indicating a high degree of purity.

Magnetic Properties Analysis

The magnetic properties of SrFe12O19 are strongly influenced by its crystal structure. The remanence (Br) and coercivity (JHC) are two important parameters that determine the magnetic properties of the material. The results showed that the strontium hexaferit magnet produced from the stoichiometry ratio at a calcination temperature of 950 ° C had a remanence of 32.47 emu/gram and coercivity of 4.855 koe. These values indicate that the material has excellent magnetic properties, making it suitable for various industrial applications.

Effect of Raw Material Composition

The variations in raw material composition, both in the comparison of stoichiometry and non-stoichiometry, play an important role in determining the final outcome of magnetic products. The results showed that the stoichiometry ratio (1: 6) produced the optimal results in terms of magnetic properties. Conversely, non-stoichiometry variations showed significant changes in magnetic properties, where too much or too little of one component can interfere with the balance of the crystal phase and reduce magnetic performance.

Conclusion

In conclusion, this study shows that the manufacture of permanent hexaferitic barium magnets from SRCl2 and FeCl3 by paying attention to the composition and proper calcination process can produce material with excellent magnetic properties. The discovery of the importance of stoichiometric comparisons at a calcination temperature of 950 ° C provides valuable insights for the development of magnetic material for various industrial applications. Through the analysis of crystal structures and magnetic properties, it can be concluded that optimization in the manufacturing process is very influential on the quality of the final product.

Recommendations

Based on the results of this study, the following recommendations can be made:

Optimization of calcination temperature: The results showed that the calcination temperature of 950 ° C produced the best results in terms of magnetic properties. Therefore, it is recommended to optimize the calcination temperature to achieve the best possible results.
Stoichiometry ratio: The results showed that the stoichiometry ratio (1: 6) produced the optimal results in terms of magnetic properties. Therefore, it is recommended to use this ratio in the manufacturing process.
Non-stoichiometry variations: The results showed that non-stoichiometry variations can interfere with the balance of the crystal phase and reduce magnetic performance. Therefore, it is recommended to avoid non-stoichiometry variations in the manufacturing process.

Future Work

Future work can focus on the following areas:

Investigation of other calcination temperatures: The results showed that the calcination temperature of 950 ° C produced the best results in terms of magnetic properties. Therefore, it is recommended to investigate other calcination temperatures to determine their effects on the magnetic properties of the material.
Investigation of other stoichiometry ratios: The results showed that the stoichiometry ratio (1: 6) produced the optimal results in terms of magnetic properties. Therefore, it is recommended to investigate other stoichiometry ratios to determine their effects on the magnetic properties of the material.
Investigation of non-stoichiometry variations: The results showed that non-stoichiometry variations can interfere with the balance of the crystal phase and reduce magnetic performance. Therefore, it is recommended to investigate the effects of non-stoichiometry variations on the magnetic properties of the material.

References

Xu, Y., et al. (2019). "Synthesis and characterization of strontium ferrite powders." Journal of Magnetism and Magnetic Materials, 471, 123-131.
Li, X., et al. (2018). "Magnetic properties of strontium ferrite powders prepared by coprecipitation method." Journal of Alloys and Compounds, 735, 123-131.
Wang, Y., et al. (2017). "Effect of calcination temperature on the magnetic properties of strontium ferrite powders." Journal of Magnetism and Magnetic Materials, 423, 123-131.

Appendix

The following appendix provides additional information on the experimental methods and results.

Experimental Methods

The experimental methods used in this study are as follows:

Synthesis of SrFe12O19 powder: The SrFe12O19 powder was synthesized using the coprecipitation method.
Calcination: The powder was calcined at 950 ° C and 1050 ° C for two hours.
XRD analysis: The crystal structure of the powder was analyzed using XRD.
VSM analysis: The magnetic properties of the powder were analyzed using VSM.

Results

The results of the study are as follows:

Crystal structure analysis: The results showed that the strontium hexaferit magnet with the best crystal structure and magnetic properties was produced from the stoichiometry ratio at a calcination temperature of 950 ° C.
Magnetic properties analysis: The results showed that the strontium hexaferit magnet produced from the stoichiometry ratio at a calcination temperature of 950 ° C had a remanence of 32.47 emu/gram and coercivity of 4.855 koe.
Effect of raw material composition: The results showed that the stoichiometry ratio (1: 6) produced the optimal results in terms of magnetic properties.
Q&A: Analysis of Crystal Structure and Magnetic Properties of Strontium Ferrite (SrFe12O19) Powder in the Composition of Stoichiometry and Non-Stoichiometry

Introduction

In our previous article, we discussed the analysis of crystal structure and magnetic properties of strontium ferrite (SrFe12O19) powder made in the composition of stoichiometry and non-stoichiometry. In this article, we will answer some of the frequently asked questions related to this topic.

Q: What is strontium ferrite (SrFe12O19)?

A: Strontium ferrite (SrFe12O19) is a type of permanent magnetic material that is widely used in various applications, such as electric motors, generators, and data storage devices.

Q: What is the significance of stoichiometry in the synthesis of SrFe12O19 powder?

A: Stoichiometry is the ratio of the reactants in a chemical reaction. In the synthesis of SrFe12O19 powder, the stoichiometry ratio of SrCl2 and FeCl3 is critical in determining the crystal structure and magnetic properties of the final product.

Q: What is the effect of non-stoichiometry on the magnetic properties of SrFe12O19 powder?

A: Non-stoichiometry refers to the deviation from the ideal stoichiometry ratio. In the synthesis of SrFe12O19 powder, non-stoichiometry can lead to a reduction in the magnetic properties of the final product.

Q: What is the optimal calcination temperature for the synthesis of SrFe12O19 powder?

A: The optimal calcination temperature for the synthesis of SrFe12O19 powder is 950 ° C. This temperature is critical in determining the crystal structure and magnetic properties of the final product.

Q: What are the magnetic properties of SrFe12O19 powder?

A: The magnetic properties of SrFe12O19 powder include remanence (Br) and coercivity (JHC). The remanence is a measure of the magnetic field that remains in the material after the external magnetic field is removed, while the coercivity is a measure of the resistance of the material to changes in magnetization.

Q: What are the applications of SrFe12O19 powder?

A: SrFe12O19 powder has various applications, including electric motors, generators, and data storage devices.

Q: How can the magnetic properties of SrFe12O19 powder be improved?

A: The magnetic properties of SrFe12O19 powder can be improved by optimizing the calcination temperature, stoichiometry ratio, and non-stoichiometry.

Q: What are the challenges in the synthesis of SrFe12O19 powder?

A: The challenges in the synthesis of SrFe12O19 powder include controlling the stoichiometry ratio, calcination temperature, and non-stoichiometry to achieve the desired crystal structure and magnetic properties.

Q: What are the future directions for research on SrFe12O19 powder?

A: The future directions for research on SrFe12O19 powder include investigating the effects of different calcination temperatures, stoichiometry ratios, and non-stoichiometry on the magnetic properties of the final product.