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New high Q microwave dielectric ceramics with rock salt structures: (1 − x)Li2TiO3 + xMgO system (0 ≤ x ≤ 0.5)

✍ Scribed by J.J. Bian; Y.F. Dong

Publisher
Elsevier Science
Year
2010
Tongue
English
Weight
943 KB
Volume
30
Category
Article
ISSN
0955-2219

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✦ Synopsis

The structural evolution and microwave dielectric properties of (1x)Li 2 TiO 3 + xMgO system (0 ≤ x ≤ 0.5) have been investigated in this paper. The ordering degree decreased with the increase of MgO content. The microcracks and cleavage on (0 0 1) due to the weak Li-O bonds disappeared with the increase of MgO content. The dielectric constant and temperature coefficient of resonant frequency decreased with the increase of MgO content. The Q × f value increased with x up to x = 0.2 and then decreases with the further increase of x. An excellent combined microwave dielectric properties could be obtained when x = 0.24, ε r = 19.2, Q × f = 106,226 GHz and τ f = 3.56 ppm/ • C.

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