Improved electrical properties of SiO 2 -added BaTiO 3 ceramics by microwave sintering

Elaboration and piezoelectric properties of high-density ceramics of the system Li0.85Ca0.15Ta0.85Zr0.15O3–SiO2

“…This is the reason why we carried out a new study with some LiTaO 3 -based ceramics sintered in the presence of various glass formers like B 2 O 3 , SiO 2 , etc. [29][30][31] Our goal was to create sintering conditions that would allow us to significantly increase the relative density of our new ceramics by filling the grain boundaries with glassy phases that improve ceramic densification. In the present article we report on the ceramic preparation and dielectric and piezoelectric behavior of the system Li 0.85 Ca 0.15 Ta 0.85 Zr 0.15 O 3 (CZ15)-SiO 2 where SiO 2 could be considered as a sintering aid for the more refractory powders of LiTaO 3 and the related CZ15, etc.…”

Comparative Study of Conventional and Microwave Sintering of Large Strain Bi-Based Perovskite Ceramics

“…The use of microwave energy in the processing of various materials-such as ceramics, metals, and composites-offers several advantages over conventional heating methods; smaller grained microstructures, improved product yields, energy savings, and reductions in manufacturing costs can be obtained, and new materials can be synthesized [1][2][3][4][5][6][7]. It has also been reported that microwave sintering can be successfully applied to the co-firing of multilayer ceramic devices-in which ceramic and metal thick films are alternatively stacked-including BaTiO 3 multilayer ceramic capacitors [8,9], ferrite chip inductors [10,11], and integrated passive devices [12].…”

“…However, no lead-free alternatives capable of perfectly replacing lead zirconate titanate have hitherto been reported, even though extensive and intensive studies to develop new lead-free alternatives have been carried out. Being a new approach in process technologies, microwave sintering (MWS) has also been investigated, by examining the effect of the fast firing method on the ferroelectric and piezoelectric properties of lead-free piezoelectric ceramics such as BaTiO 3 -based [6,17], (K,Na)NbO 3 -based [18][19][20], (Bi,Na)TiO 3 -based [21], and (Sr,Ba)Nb 2 O 6 [22] ceramics.…”

High-Performance Protonic Ceramic Electrochemical Cells

“…25,26 In this regard, the microwave-assisted sintering has been investigated for the manufacture of various ceramic materials, including glass ceramics, 27 bioceramics, 28,29 and electroceramics. 30,31 Recently, our preliminarly research demonstrated that yttria-stabilized zirconia (YSZ)-based solid oxide fuel cells (SOFCs) could be successfully fabricated using a microwave-assisted sintering process in 10 min at 1400 °C, which is much faster than the conventional sintering process (3 h at 1400 °C). 32 Inspired by previous research, we aimed to manufacture the multilayered PCECs sintered within a few minutes using a microwave-assissted sintering process.…”

“…There are several fast sintering techniques with direct heating mechanisms, such as spark plasma sintering, − flash sintering, , and microwave-assisted sintering, − which apply a pulsed current, an electric field to the material as energy sources, respectively. Among these, microwave-assisted sintering induces dielectric heating, which includes bipolar rotation and resistive heating in the cermaic material with homogeneous and fast heat transfer rates (∼50 °C/min). , Furthermore, a high heating rate can refine the microstructure of sintered materials by bypassing the surface diffusion region, which mainly causes the particle coarsening during ramping up to the sintering temperature. , In this regard, the microwave-assisted sintering has been investigated for the manufacture of various ceramic materials, including glass ceramics, bioceramics, , and electroceramics. , Recently, our preliminarly research demonstrated that yttria-stabilized zirconia (YSZ)-based solid oxide fuel cells (SOFCs) could be successfully fabricated using a microwave-assisted sintering process in 10 min at 1400 °C, which is much faster than the conventional sintering process (3 h at 1400 °C) . Inspired by previous research, we aimed to manufacture the multilayered PCECs sintered within a few minutes using a microwave-assissted sintering process.…”