文章基本信息

标题：Influence of the firing temperature on the dielectric properties of ceramics based on barium titanate
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作者：Georgiy Lisachuk ; Ruslan Kryvobok ; Artem Zakharov 等
期刊名称：Technology Audit and Production Reserves
电子版ISSN：2706-5448
出版年度：2021
卷号：5
期号：3
页码：10-13
DOI：10.15587/2706-5448.2021.242865
语种：English
出版社：PC Technology Center
摘要：The object of the research is the firing temperature of ceramic materials based on barium titanate. In laboratory conditions, barium titanate was synthesized from raw materials of barium carbonate and titanium dioxide using ceramic technology, taking into account the stoichiometric composition of the compound. In order to study the effect of the firing temperature on the properties of the ceramic material, three temperatures were selected: 1270, 1300, and 1350°C. The physical properties of the samples (imaginary density, water absorption, open porosity) were determined by the method of hydrostatic weighing in water. The samples were saturated with water after their preliminary evacuation. The dielectric characteristics of the obtained materials were measured on an E7-8CLR automated device (Ukraine) at a frequency of 1kHz. The structural and morphological features of ceramics based on synthesized barium titanate were investigated by direct scanning electron microscopy and X-ray phase analysis. On the basis of the complex of studies carried out, the technological parameters of the production of ceramics were selected. Thus, the duration of grinding at the first and second stages is 10 and 30 minutes; moisture content of the press powder – 8%; pressing pressure – 20MPa; temperature of the first firing – 1000°С; temperature of the second firing – 1350°C. The regularity of the change in the dielectric constant on the firing temperature of ceramics based on barium titanate was established. The investigated samples, obtained according to the given technological regime, are characterized by the following indicators: dielectric constant – 259.9; open porosity – 0.02%; water absorption – 0.01%; imaginary density – 5.45g/cm3. The resulting material can be used to create composite ceramic materials that protect biological and technical objects from the effects of electromagnetic radiation, and can also be used to create new functional materials for space, aerospace, electronic engineering and medicine.
关键词：ceramic technology;semi-dry pressing;thermal sintering;dielectric constant;imaginary density;open porosity