高纯度,结晶性和电机敏度的无 (Ba0.85Ca0.15) (Zr0.10Ti0.90) (O3) 合成使用EDTA/糖改性桃花法
Laura Caggiu1, Costantino Cau1,2, Marzia Mureddu1
1Department of Chemical, Physical, Mathematical and Natural Sciences, University of Sassari, Via Vienna 2, 07100 Sassari, Italy.
Materials (Basel, Switzerland)
|March 13, 2025
概括
一种经过修改的Pechini方法可以在较低的温度下合成单相酸酸酸材料. 由于粒度分布均,该工艺产生了出色的机电性能.
科学领域:
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
- 陶工程 陶工程
背景情况:
- 无压电陶对于可持续的电子应用至关重要.
- 开发高效的合成路径对于矿材料,如酸酸酸酸 (BCZT) 是必不可少的.
研究的目的:
- 通过修改的Pechini方法合成单相BCZT材料.
- 研究乙烯基二胺三酸和甘油对BCZT的合成和特性的影响.
- 在BCZT陶中实现增强的机电性能.
主要方法:
- 经过修改的Pechini合成,使用乙烯基二胺三酸 (化剂) 和糖醇 (化剂).
- 在900°C下进行化,以实现完整的相变.
- 在1400°C下烧结,以达到高相对密度 (91%).
主要成果:
- 成功合成了一种单相四角形BCZT材料.
- 在900°C达到完整的化学转化,比传统方法低300°C.
- 均的颗粒大小分布 (10微米) 和高相对密度 (91%).
- 优良的电机性能:d33 = 451 pC/N,d31 = 160 pC/N,kp = 0.40, ε'33T = 4790,Qm = 358. 电机性能非常优越:d33 = 451 pC/N,d31 = 160 pC/N, kp = 0.40, ε'33T = 4790,Qm = 358. 电机性能非常优越:d33 = 451 pC/N,d31 = 160 pC/N, kp = 0.40, ε'33T = 4790,Qm = 358. 电机性能非常优越,电机性能非常优越.
结论:
- 经过修改的Pechini方法为BCZT在降低温度下合成提供了一条有效的途径.
- 乙烯基二胺四酸和甘油在促进相位均性和细粒结构方面是有效的.
- 合成的BCZT表现出有前途的压电和介电性质,可用于先进的应用.
相关概念视频
03:46Qualitative Analysis
For solutions containing mixtures of different cations, the identity of each cation can be determined by qualitative analysis. This technique involves a series of selective precipitations with different chemical reagents, each reaction producing a characteristic precipitate for a specific group of cations. Metal ions within a group are further separated by varying the pH, heating the mixture to redissolve a precipitate, or adding other reagents to form complex ions.
For instance, group IV...
For instance, group IV...
01:22EDTA: Chemistry and Properties
Polydentate ligands are most widely used in complexometric titrations because they form more stable complexes with the metal ions than mono- or bidentate ligands due to the chelate effect. Examples of polydentate ligands are ethylenediaminetetraacetic acid (EDTA), crown ethers, and cryptands. The most important feature of optimal polydentate ligands is the ability to form 1:1 complexes in a single-step process. Amino carboxylic acid derivatives are frequently used as complexing agents. EDTA is...
01:26EDTA: Auxiliary Complexing Reagents
EDTA titrations are usually carried out in highly basic conditions, where the fully deprotonated form of EDTA, Y4−, actively complexes with the free metal ions in the solution. Several metal ions precipitate as hydrous oxide (hydroxides, oxides, or oxyhydroxides) under these conditions, lowering the concentration of free metal ions in the solution. For this reason, auxiliary complexing agents or ligands such as ammonia, tartrate, citrate, or triethanolamine are used in EDTA titrations to...
01:19Masking and Demasking Agents
EDTA titrations may necessitate masking and demasking agents to temporarily protect a particular metal ion in a mixture from the EDTA reaction. These agents facilitate the sequential analysis of the metal ions by forming stable complexes with some—but not all—metal ions during certain steps.
There are many masking agents, such as cyanide, fluoride, triethanolamine, thiourea, and 2,3-bis(sulfanyl)propan-1-ol (formerly 2,3-dimercapto-1-propanol), with the masking agent chosen based on the metal...
There are many masking agents, such as cyanide, fluoride, triethanolamine, thiourea, and 2,3-bis(sulfanyl)propan-1-ol (formerly 2,3-dimercapto-1-propanol), with the masking agent chosen based on the metal...