New dielectric material system of Mg0.95Co0.05TiO3−Zn0.975Ca0.025TiO3 at microwave frequencies

Sinterability and microwave dielectric properties of nano structured 0.95MgTiO3–0.05CaTiO3 synthesised by top down and bottom up approaches

“…He has also studied the effect of ZnO and V 2 O 5 addition on the microwave dielectric properties of 0.85MgTiO 3 -0.15Ca 0.6 La 0.8/3 TiO 3 [12] and 0.8(Mg 0.95 Zn 0.05 )TiO 3 -0.2Ca 0.61 Nd 0.26 TiO 3 ceramics [13] respectively and observed the possibilities of tuning microwave dielectric properties by controlling the additive amount. Extensive studies have been carried out by Chen on modified MCT ceramics with modifications done by substituting different elements in the Mg, Ca and Ti sites of MCT systematically [13][14][15][16][17][18][19][20]. In the place of Mg in MgTiO 3, elements like Zn [14,15], Co [16], La [17,18] and Nd [19] were substituted.…”

Characterization and dielectric behavior of V2O5-doped 0.9Mg0.95Co0.05TiO3–0.1Ca0.6La0.8/3TiO3 ceramic system at microwave frequency

“…The advantage of using dielectric resonator is that it makes the size reduction of microwave components possible. Requirements for these dielectric devices must be combined with a high dielectric constant (ε r > 15) for possible size miniaturization (size of a dielectric resonator is .1/ √ ε r ), a low dielectric loss (Q > 5000, where Q = 1/tan ı) for high frequency selectivity and low signal attenuation, and a near-zero temperature coefficient of resonant frequency ( f ) for temperature stable circuits [1][2][3][4][5]. These three parameters are correlated to the size, frequency selectivity and temperature stability of the system, respectively.…”

“…These three parameters are correlated to the size, frequency selectivity and temperature stability of the system, respectively. Several compounds such as (Zr, Sn)TiO 4 , Ba(Mg 1/3 Ta 1/3 )O 3 , and (Mg, Ca)TiO 3 have been developed [6][7][8][9][10][11][12][13][14].…”

“…In our previous study, Ca 0.6 La 0.8/3 TiO 3 was added to Mg 0.95 Co 0.05 TiO 3 as a ceramic system of (1 − x)Mg 0.95 Co 0.05 TiO 3 -xCa 0.6 La 0.8/3 TiO 3 (hereafter referred to as MCT-CLT), which demonstrated an effective compensation in its temperature coefficient ( f ) [2]. As x = 0.1, the 0.9Mg 0.95 Co 0.05 TiO 3 -0.1Ca 0.6 La 0.8/3 TiO 3 (hereafter referred to as 91MCT-CLT) ceramic sintered at 1350 • C/4 h exhibited excellent microwave dielectric properties: a dielectric constant (ε r ) of 21.8, a Q × f value of 131,000 (GHz) and a temperature coefficient ( f ) of −15.5 ppm/ • C. In this study, V 2 O 5 was added to the (1 − x)Mg 0.95 Co 0.05 TiO 3 -xCa 0.6 La 0.8/3 TiO 3 ceramics system as a sintered aid to lower its sintering temperature and to improve its microwave dielectric properties.…”

Characterization and dielectric behavior of a new dielectric ceramics MgTiO3–Ca0.8Sr0.2TiO3 at microwave frequencies

“…Basically, a dielectric resonator is a ceramic compact with high dielectric constant (ε r > 25), low dielectric loss or high quality factor (Q > 2000) and good temperature stability (near-zero temperature coefficient of resonant frequency, f ) at microwave frequencies [2][3][4][5][6][7][8][9][10][11][12][13].…”