Aqueous tape casting of Li1.075Nb0.625Ti0.45O3 using PVA/PVAc co-binder

LI Shaochun; ZHANG Qilong; YANG Hui; ZOU Dong

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Aqueous tape casting of Li_1.075Nb_0.625Ti_0.45O₃ using PVA/PVAc co-binder

更新时间：2025-12-10

- Aqueous tape casting of Li_1.075Nb_0.625Ti_0.45O₃ using PVA/PVAc co-binder
- CIESC Journal Issue 5, Pages: 1320-1324(2008)
- 作者机构：
  
  浙江大学材料科学与工程学系
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：05 May 2008，
  
  Published：05 May 2008
- 稿件说明：
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LI Shaochun, ZHANG Qilong, YANG Hui, et al. Aqueous tape casting of Li_1.075Nb_0.625Ti_0.45O₃ using PVA/PVAc co-binder[J]. CIESC Journal, 2008, (5): 1320-1324.
DOI：

LI Shaochun, ZHANG Qilong, YANG Hui, et al. Aqueous tape casting of Li_1.075Nb_0.625Ti_0.45O₃ using PVA/PVAc co-binder[J]. CIESC Journal, 2008, (5): 1320-1324. DOI：

摘要

采用PVA/PVAc复合黏结剂制备Li1.075Nb0.625Ti0.45O3微波介质陶瓷基片。研究了PVAc用量和固相含量对浆料流变性能以及流延膜片力学性能的影响。结果表明，随着PVAc添加量的增加，浆料的黏度和屈服应力不断下降，膜片的断裂方式由韧性断裂转变为脆性断裂。随着浆料固相含量的增大，浆料的流变模型从Bingham型转变为Casson型。SEM观察表明，膜片的微观结构非常均匀。

Abstract

Li1+x-yNb1-x-3yTix+4yO3 microwave ceramic tapes were prepared by aqueous tape casting using polyvinyl alcohol (PVA) and polyvinyl acetate (PVAc) as co-binder.The effects of PVAc contents and solid loadings on rheological behavior and mechanical properties were studied.The apparent viscosity and yield stress of the slurries were markedly decreased with increasing PVAc content.As the solid loading was increased

the rheological characteristics of the slurries varied from Bingham model to Casson model.The tensile test indicated that the failure characteristics of the green tapes showed a transition from ductile fracture to brittle fracture with the increase of PVAc content.In addition

the microstructure of the green tapes was homogeneous.

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