利用领域工程来实现高极化放松铁电,用于低消耗陶电容器
Zixiong Sun1,2,3,4, Liming Diwu1, Yongming Hu2
1School of Electronic Information and Artificial Intelligence, Shaanxi University of Science and Technology, Xi'an 710021, PR China.
Inorganic chemistry
|July 23, 2024
概括
这项研究通过添加酸 (NN) 来增强酸 (BCZT) 陶. 由此产生的 (1-x) BCZT-xNN陶显示出更好的储能能力,提供高效的介电电容.
科学领域:
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
- 介电材料 介电材料
背景情况:
- 酸酸酸酸 (BCZT) 是一种有前途的矿材料,用于储能应用.
- 提高BCZT陶的介电性质和能量密度对于先进的电容技术至关重要.
研究的目的:
- 研究将酸 (NN) 纳入BCZT网格对结构和介电性质的影响.
- 探索 (1-x) BCZT-xNN陶对于高性能介电储能电容的潜力.
主要方法:
- 使用固态反应方法合成 (1-x) BCZT-xNN陶组合物.
- 通过XRD,P-E循环和能量密度计算等技术来表征结构性,介电性和储能性能.
- 数学推导以验证极化行为和能量储存效率.
主要成果:
- 将NN纳入BCZT抑制了反铁电,但诱导了域运动减少和高极化壁 (HPW) 的形成.
- 基于0.90BCZT-0.10NN的组合,与其他基于BCZT的铁电相比,显示出更高的极化.
- 对于0.90BCZT-0.10NN,在360kV/cm的3.86 J/cm3的可回收能量密度 (Wrec) 得到了实现,高的Wrec/Eb比率表明有效的能源消耗.
- 在0.30.的NN度下观察到最大Wrec为5.36 J/cm3.
结论:
- 将NN添加到BCZT是开发具有增强能量存储能力的高性能介电电容器的可行策略.
- 观察到的HPW和域行为有助于改善这些新型陶中的极化和能量密度.
- 这项研究为制造低消耗,高效介电储能器件提供了一条新的途径.
相关概念视频
Dielectric Polarization in a Capacitor
4.6K
The presence of a dielectric medium in a capacitor not only changes the voltage and capacitance but also affects the electric field. In general, dielectrics can be of two types: polar and nonpolar. In a polar dielectric, the positive and negative charges in the molecules are separated by a distance and hence have a permanent dipole moment. In contrast, no such charge separation exists in a nonpolar dielectric, however the nonpolar molecules get polarized in the presence of an external electric...
4.6K
Capacitor With A Dielectric
3.9K
Parallel plate capacitors consist of two conducting plates separated by a certain distance. However, it is mechanically difficult to hold the large plates parallel to each other without actual contact. Hence, a dielectric layer is commonly placed between the plates, which provides an easy solution for holding the plates together with a small gap and increases the capacitance of the capacitor.
Dielectrics are non-conducting materials with no free or loosely bound electrons. When a dielectric is...
Dielectrics are non-conducting materials with no free or loosely bound electrons. When a dielectric is...
3.9K
MOS Capacitor
756
A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
756
Spherical and Cylindrical Capacitor
5.6K
A spherical capacitor consists of two concentric conducting spherical shells of radii R1 (inner shell) and R2 (outer shell). The shells have equal and opposite charges of +Q and −Q, respectively. For an isolated conducting spherical capacitor, the radius of the outer shell can be considered to be infinite.
Conventionally, considering the symmetry, the electric field between the concentric shells of a spherical capacitor is directed radially outward. The magnitude of the field,...
Conventionally, considering the symmetry, the electric field between the concentric shells of a spherical capacitor is directed radially outward. The magnitude of the field,...
5.6K
Capacitors
426
Capacitors play a crucial role in car radios, where they filter and store frequencies to ensure clear signal reception. Essentially serving as energy storage devices, capacitors store energy within their electric field and are composed of two parallel conducting plates separated by a dielectric.
When a voltage source is connected to a capacitor, positive and negative charges accumulate on the opposite plates. This accumulation generates a potential difference that equals the product of the...
When a voltage source is connected to a capacitor, positive and negative charges accumulate on the opposite plates. This accumulation generates a potential difference that equals the product of the...
426
Capacitors and Capacitance
7.6K
A device consisting of two electrical conductors that are separated by a distance and used to store electrical charges is called a capacitor. The space between the conductors is either a vacuum or an insulating material, called a dielectric. Capacitors have many applications, ranging from filtering static from radio reception to energy storage in heart defibrillators.
When the conductors are two identical parallel plates, it is called a parallel plate capacitor. When battery terminals are...
When the conductors are two identical parallel plates, it is called a parallel plate capacitor. When battery terminals are...
7.6K


