Preparation method of TiO2-excessive high-dielectric-tunability ceramic (Ba,Sr)TiO3

The invention relates to a preparation method of (Ba,Sr)TiO3 (BST) ceramic having high tunability and high temperature stability, belonging to the technical field of preparation of special ceramics for a wireless communication technology. The BST ceramic is prepared by taking BaCO3, TiO2 and SrCO3 a...

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Bibliographische Detailangaben
Hauptverfasser:	JIN DENGREN, DONG HANTING, XIE CHAOJUN, ZHOU LIXIN
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	ARTIFICIAL STONE CEMENTS CERAMICS CHEMISTRY COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE LIME, MAGNESIA METALLURGY REFRACTORIES SLAG TREATMENT OF NATURAL STONE
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Beschreibung
Zusammenfassung:	The invention relates to a preparation method of (Ba,Sr)TiO3 (BST) ceramic having high tunability and high temperature stability, belonging to the technical field of preparation of special ceramics for a wireless communication technology. The BST ceramic is prepared by taking BaCO3, TiO2 and SrCO3 as raw materials, combining a solid-phase reaction method, an ice bath ultrasonic method and a sol-permeable auxiliary sintering technology, adding TiO2 into a BaTiO3/SrTiO3 mixed-phase biscuit and sintering at a low sintering temperature (1280 DEG C); and the tunability of the BST ceramic is 36.9% (room temperature/10KHz), the dielectric loss is less than 0.03 (room temperature/100Hz-10MHz), and the BST ceramic has high temperature stability. The invention provides a feasible method for preparing BST dielectric ceramic having high tunability and high temperature stability, which is simple in process, low in production cost and easy to realize mass production.