BST Nano-Powder for Infrared Detector Prepared by Sol-Gel Method

Abstract:

As a typical composite with perovskite structure, (Ba_1-xSr_x)TiO₃ (briefly named BST) shows many merits, This paper provides a new sol-gel method to prepare BST gel, and carry out a research and analysis on the thermal evolution of gel. The BST nanopowder is prepared by the heat treatment through the traditional sintering method and microwave sintering technique, respectively. The synthesis temperature of perovskite phase by sol-gel method decreases from 1380°C to 900°C, comparing with that by traditional solid-state reaction method. The XRD and SEM results show that microwave sintering technique can control effectively the grain growth size of BST ceramic, and the powder has the uniform chemical components and grain size of around 60nm. Furthermore, the grain size is reduced, the dielectric constant increased dramatically and the dispersivity reduced.

• Periodical: Applied Mechanics and Materials (Volume 364)
• Pages: 760-764
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.364.760
• Online since: August 2013
• Authors: Mao Yan Fan, Li Fang Zhang
• Keywords: BST, Grain Size, Microwave Sintering, Nanopowder, Sol-Gel

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