Structural analysis and microwave dielectric properties of a novel Li2Mg2Mo3O12 ceramic with ultra-low sintering temperature

Influences of substituting of (Ni1/3Nb2/3)4+for Ti4+on the phase compositions, microstructures, and dielectric properties of Li2Zn[Ti1−x(Ni1/3Nb2/3)x]3O8(0 ≤x≤ 0.3) microwave ceramics

“…(2.93 Å). Higher molecular polarizability would have lower scattered energy, and hence leads to a low wavenumber [49,50]. In addition, the FWHM has a significant contribution towards the Q×f value since it reflects the short -range ordering degree of the structure.…”

Zn2+-Enhanced Lithium Magnesium Molybdate Ultralow Temperature Cofired Ceramics for Terahertz Wavefront Modulation Applications

“…For example, Professors Joseph and Varghese have developed a series of ULTCC ceramics, including CuMoO 4 (ε r = 7.9, Q × f = 53,000 GHz, τ f = −36 ppm/°C), Ag 2 O-CuMoO 4 (ε r = 9, Q × f = 37,000 GHz, τ f = −33 ppm/°C), 10Li 2 O-10Na 2 O-20K 2 O-60MoO 3 (ε r = 4.85, Q × f = 11,078 GHz, τ f = +291 ppm/°C), α-MoO 3 (ε r = 6.6, Q × f = 41,000 GHz, τ f = −25 ppm/°C), anatase TiO 2 A-30GO17 (ε r = 9.9, Q × f = 1650 GHz, τ f = +7.4 ppm/°C), and rutile TiO 2 R-30GO17 (ε r = 15, Q × f = 3300 GHz, τ f = +8.3 ppm/°C). − In addition, a series of multilayer ceramic substrates have been developed using the above materials and the tape-casting process. − However, although ULTCC ceramics with excellent microwave dielectric properties have been successfully developed, ULTCC ceramics that also possess excellent terahertz transmission properties have rarely been reported. In past studies, Li 2 Mg 2 Mo 3 O 12 (LMMO) ceramic not only possesses excellent microwave dielectric properties but also good terahertz transmission properties. , In particular, it can achieve microwave dielectric properties up to ε r = 7.9, Q × f = 43,844 GHz, τ f = −48.3 ppm/°C and terahertz transmission performance up to ε r 1 = 7.4, tanδ 1 = 0.0158, T amplitude = 0.598 when enhanced by Na + . Obviously, there is still room for further improvement in both the microwave dielectric properties and the terahertz transmission properties.…”

Ultra-low temperature cofired ceramics based on Li2WO4as perspective substrate materials for terahertz frequencies

“…The list of the crystalline materials characterized by very low sintering temperatures accompanied by good intrinsic dielectric properties (including low dielectric loss) is really short. Besides the quite intensively studied molybdates [3][4][5][6][7][8][9][10][11][12][13][14], some borates [15][16][17][18], and tungstates [19][20][21] are also promising candidates.…”