Dielectric properties of screen-printed (Ba,Sr,Ca)TiO3 thick films modified with Al2O3 for microwave device applications

Tuning of dielectric, pyroelectric and ferroelectric properties of 0.715Bi0.5Na0.5TiO3-0.065BaTiO3-0.22SrTiO3 ceramic by internal clamping

“…The weakening of the Ti-O bond leads to a weaker distortion of the octahedron and brings about a decrease in the c/a ratio, thus inducing a drop in the Curie temperature, dielectric permittivity and higher dielectric loss. [65][66][67] Further, it is to be noted that 4% ceramic-glass shows highest dielectric loss, which could be the effect of grain size as similar results are also observed by many researcher. 29,[67][68][69] Incorporation of glass into ceramic matrix has been reported to inhibit grain growth.…”

“…[65][66][67] Further, it is to be noted that 4% ceramic-glass shows highest dielectric loss, which could be the effect of grain size as similar results are also observed by many researcher. 29,[67][68][69] Incorporation of glass into ceramic matrix has been reported to inhibit grain growth. Further, the grains so formed are separated from adjacent grains through thicker grain boundaries with glass in-between.…”

“…These properties can be understood in terms of the effects of the grain size and the creation of oxygen vacancies due to incorporation of glass forming elements within the perovskite structure. [65][66][67] In our case, the effect of substitution of Ba 2+ with Bi 2+ results in changing the bonding force between the A-site ion and the oxygen ion of ABO 3 perovskite structure. The ionic radius of Ba 2+ is larger than that of the Bi 2+ ion.…”

Microstructure Modifications and Sintering Mechanism of Ba0.55Sr0.4Ca0.05TiO3 Ceramics Containing Different MgO Additive for LTCC Application

“…Altering the Ca 2+ composition in BST ferroelectric ceramics can widen and depress Curie peak. As a result, the phase transition of BSCT occurs over a wide temperature range and the dielectric‐temperature stability is also improved. Meanwhile, adopting the superfine powders is a feasible approach to improve the sinterability of the composites, which has been proved in our previous work.…”

Characterization and Process Optimization of Microwave Drying of Plaster of Paris

“…If suitably applied, microwave drying is faster and probably cheaper on a long-term basis after an initial capital cost outlay for equipment. In recent years, microwave energy has found increasing application for thermal processing of various kinds of materials and products in the areas of agricultural, [9][10][11][12] chemical, [13][14][15] ceramic, [16][17][18] mineral, [19][20][21] food, [22][23][24][25] leather, [26] pharmaceutical, [27,28] etc.…”