Preparation And Use Of Copper Calcium Titanate（CCTO）

Preparation and application of copper calcium titanate: Innovative exploration in the field of chemistry

February 25, 2025, China -- Calcium copper titanate (CaCu3Ti4O12, CCTO), as a compound with unique physicochemical properties, has attracted wide attention in the field of chemistry and materials science in recent years. Its perovskite cubic crystal structure, anomalous giant dielectric constant and extremely low loss make copper calcium titanate have broad application prospects in high density energy storage, thin film devices, high dielectric capacitors and other high-tech fields. In this paper, the preparation and application of calcium cupric titanate are introduced in detail.

◆ Preparation method of copper calcium titanate
The preparation methods of copper calcium titanate can be divided into dry method and wet method, including solid phase method, sol-gel method, coprecipitation method and hydrothermal synthesis method. Among them, solid phase method is widely used because of its simple process and low cost.

The solid phase method generally uses calcium oxide, copper oxide and titanium dioxide as raw materials, which are mixed by ball milling and calcined to obtain copper calcium titanate ceramics. However, due to the inhomogeneity of the raw material and the low activity of the powder, the synthesis temperature is increased, and the sintered ceramics are uneven in microstructure and grain size. In addition, the ball milling mixing and milling refinement during the preparation process may also introduce impurity phases, thereby reducing the dielectric constant.

In order to overcome these shortcomings of the solid phase method, the researchers also tried other preparation methods. For example, sol-gel method, co-precipitation method and hydrothermal synthesis method can prepare copper calcium titanate powder with more uniform microstructure and higher activity by controlling reaction conditions. However, these methods are usually cumbersome, costly, and have high requirements for equipment.

It is worth noting that in recent years, there are still researchers using mobile solvent floating zone method and sol-gel method to prepare CCTO single crystals, but the preparation of single crystals is generally difficult. Laser deposition and magnetron sputtering are used for CCTO films. The former component is easy to control, and the latter is conducive to large area film making.

◆ Methods for the use of copper calcium titanate
Because of its unique physical and chemical properties, calcium cupric titanate has potential application value in many fields. However, in order to give full play to its performance, the following points need to be noted when using:

Understanding physical and chemical properties: Basic physical and chemical properties such as crystal structure, appearance, density and solubility of calcium cupric titanate are essential for its application. A deeper understanding of these properties helps to better understand their characteristics and scope of application.
Clear application areas: Calcium copper titanate has received attention in the research and development of electronic materials, ceramic materials, etc. Identifying its application areas helps to carry out targeted research and development work.
Attention to stability: The stability of copper calcium titanate under different environmental conditions is of great significance for its storage, use and performance maintenance. Therefore, it is necessary to evaluate its stability under specific conditions before use.
Attention to safety: Although calcium copper titanate itself may not be obviously dangerous, it is still necessary to follow the relevant safe operating procedures during handling and use, and avoid contact with skin, eyes, etc.
Consider compatibility: In some applications, calcium copper titanate may need to be used in combination with other ingredients. Understanding their interactions can avoid unnecessary problems.
Performance characteristics: The electrical properties, magnetic properties, optical properties, etc. of calcium copper titanate determine its performance and effect in specific applications. Therefore, it is necessary to fully understand its performance characteristics before use.

◆ Conclusion
As a compound with unique physical and chemical properties, calcium cupric titanate has broad application prospects in many fields. Through continuous exploration and improvement of preparation methods, as well as in-depth understanding of its use points, we can better play the performance advantages of copper calcium titanate, promote its application and development in the field of high-tech. With the deepening of research and technological progress, it is believed that copper calcium titanate will play a more important role in the future.