Research & Reviews: Journal of Material Sciences
MenuISSN:2321-6212
ISSN:2321-6212
Dmitry I. Vartanyan and Nikolay A. Makarov
Mendeleev University of Chemical Technology of Russia, Russian Federation
Posters & Accepted Abstracts: Res. Rev. J Mat. Sci
Statement of the Problem: Currently, due to intensive development of Wi-Fi and mobile communications, the number of widely used microwave devices, such as filters, resonators and a number of other electronic components, has significantly increased. Since modern electronic devices tend to be portable, it is necessary that electronic components are also miniaturized and highly sophisticated. Technology of low-temperature co-firing of ceramics (LTCC) allows to miniaturize multilayer components, using silver as a high-conductivity metal electrode. In addition to the need to provide microwave dielectric properties, ceramics obtained by the LTCC technology must have a sintering temperature that does not exceed the silver melting temperature of 961�?°C. Methodology & Theoretical Orientation: Despite the fact that there are a number of materials with high microwave dielectric properties, they cannot be obtained with LTCC technology, since they have a sintering temperature much higher than 961�?°C. The Li2O-ZnO-TiO2 system has developed a material with a sintering temperature of 950�?°C for LTCC, which can be used for the production of electronic applications, such as resonators, filters and other. Findings: As a sintering additive, a eutectic composition in the Li2O-ZnO-B2O3 (LZB) system was used. The addition of 5.0 wt. % of LZB allows reach a relative density of 98% at 950�?°C. The effects of the additive on sintering behavior, phase composition, microstructure and microwave dielectric properties were studied. Conclusion & Significance The material is characterized by dielectric permittivity �?µ17.7 and quality factor Qxf of 407 MHz.Recent Publications: 1. Vershinin D.I., Makarov N.A. (2017) Ceramic dielectrics in the Li2O-ZnO-TiO2 system for LTCC technology. Proc. XII Internat Conf. â�?�?Modern methods and technologies for creating and processing materialsâ�?. 34-39. 2. Sumesh G., Mailadil T.S. (2010) Microware dielectric properties of novel temperature stable high Q Li2Mg1-xZnxTi3O8 and Li2A1-xCaxTi3O8 (A = Mg, Zn) ceramics. J. Europ. Ceram. Soc. 30:2585-2592. 3. Sayyadi-Shahraki A., Taheri-Nassaj E., Hassanzadeh-Tabrizi S.A., Barzegar-Bafrooei H. (2015) Microware dielectric properties and chemical compatibility with silver electrode of Li2TiO3 ceramics with Li2Oâ�?�?ZnOâ�?�?B2O3 glass additive. Physica B. 457:57-61. 4. Sebastian M.T. Dielectric Materials for Wireless Communication. Elsevier Science, 2008. 5. George S., Sebastian M.T. (2011) Low-Temperature Sintering and Microwave Dielectric Properties of Li2ÐTi3O8 (A=Mg, Zn) Ceramics. Internat. J. Appl. Ceram. Techn. 8(6):1400-1407.
Dmitry Vershinin is a young specialist in the field of chemistry and technology of inorganic materials, physicochemical regularities in the technology of ceramic materials based on refractory oxide compounds. The main scientific activity is devoted to the creation of new types of ceramic materials and the study of their properties.
Email:D.I.Vershinin@yandex.ru