A Novel Room-Temperature Synthesis Technique for Producing High-Density Ba1-Sr TiO3 and PbZr Ti1-O3 Composites
A Novel Room-Temperature Synthesis Technique for Producing High-Density Ba1-Sr TiO3 and PbZr Ti1-O3 Composites
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DOI：
10.1016/j.jeurceramsoc.2022.04.002
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发表时间：
2022-04
影响因子：
5.7
通讯作者：
Evan Smith;A. Block;R. Ubic
中科院分区：
文献类型：
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作者：
Evan Smith;A. Block;R. Ubic
在室温下合成电容器的能力具有很大的成本节约潜力相比，能源密集型的传统烧结技术，涉及在高温下延长时间。在这项工作中，几个组合物中的Ba 1-xSrxTiO 3（BST）和PbZryTi 1-yO 3（PZT）系列常规合成和致密化通过室温制造（RTF）过程。将BST和PZT颗粒涂覆并与用作粘合剂的Li 2 MoO 4（LMO）的水溶液混合。在这项工作中提出的新技术，包括使用真空辅助的颗粒模具和浴超声波发生器的组合，旨在增加所得颗粒的密度。使用LMO作为粘合剂，BSTx= 0.5的相对密度高达96.1%，BSTx= 0.45%的相对密度高达96.9%，PZTy= 0.5的RTF颗粒的相对密度高达95.1%。这些复合材料是迄今为止报道的致密室温制备的复合材料。此外，混合的效果与两种不同的粒径分布的颗粒进行了分析，与PZT颗粒的复合材料生产。所有这些致密RTF复合材料的介电性能在150 °C至− 60 ℃的温度范围内进行了测量，并与具有相同成分的传统烧结电瓷进行了比较。
The ability to synthesize capacitors at room temperature has great cost-saving potential compared to energy-intensive conventional sintering techniques which involve extended periods at high temperature. In this work, several compositions in the Ba1-xSrxTiO3(BST) and PbZryTi1-yO3(PZT) series were synthesized conventionally and densified via a room-temperature fabrication (RTF) process. The BST and PZT particles were coated and mixed with an aqueous solution of Li2MoO4(LMO), which acts as a binder. The novel techniques presented in this work, including the usage of a vacuum-assisted pellet die and a bath sonicator in combination, were designed to increase the density of the resultant pellets. Relative densities as high as 96.1% were achieved for BSTx= 0.5, 96.9% for BSTx= 0.45%, and 95.1% for PZTy= 0.5 RTF pellets using LMO as a binder. These composites are the densest room-temperature fabricated composites reported to date. In addition, the effect of mixing particles with two different size distributions was analyzed for composites produced with PZT particles. The dielectric properties of all these dense RTF composites were measured at temperatures ranging from 150 °C to − 60 ℃ and compared with those of conventionally sintered electroceramics with the same compositions.