A low-temperature reactive sintering process for the 5Li2O–1Nb2O5–5TiO2 microwave dielectric ceramics |
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Authors: | Qun Zeng Wei Li |
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Affiliation: | aSchool of Information Photoelectric Science and Engineering, South China Normal University, Guangzhou 510006, China;bKey Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China |
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Abstract: | The B2O3-doped 5Li2O–1Nb2O5–5TiO2 composite microwave dielectric ceramics prepared by conventional and low-temperature single-step reactive sintering processes were investigated in the study. Without any calcinations involved, the Nb2O5 mixture of Li2CO3 and TiO2 was pressed and sintered directly in the reactive sintering process. More uniform and finer grains could be obtained in the 5Li2O–1Nb2O5–5TiO2 ceramics by reactive sintering process, which could effectively save energy and manufacturing cost. And relatively good microwave dielectric properties of r = 41, Q × f = 9885 GHz and τf = 43.6 ppm/°C could be obtained for the 1 wt.% B2O3-doped ceramics reactively sintered at 900 °C. |
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Keywords: | Ceramics Dielectric properties Reactive sintering |
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