Flash sintering of lead zirconate titanate (PZT) ceramics: Influence of electrical field and current limit on densification and grain growth

Flash sintering of 3YSZ/Al2O3‐platelet composites

“…It should be noted that there is current overshoot of the 100 mA (corresponding to the current density of 3.7 A/cm 2 ), which is caused by the delay of 50 ms (very briefly) in changing of power supply from voltage control to current control. This abrupt increase in current density is a characteristic feature of flash sintering . Therefore, it can be concluded that the flash sintering of 3YSZ/Al 2 O 3 ‐platelet composites occurs under the electric fields of 300‐800 V/cm, which is further confirmed by the SEM analyses shown below.…”

“…This abrupt increase in current density is a characteristic feature of flash sintering. 15,29 Therefore, it can be concluded that the flash sintering of 3YSZ/Al 2 O 3platelet composites occurs under the electric fields of 300-800 V/cm, which is further confirmed by the SEM analyses shown below. The onset furnace temperature for flash sintering is 645°C, 578°C, 551°C, 502°C, and 492°C under the electric field of 300, 400, 500, 600, and 800 V/cm, respectively.…”

“…6 Up to now, flash sintering has been used to densify many different ceramic materials, including ionic conductors (8YSZ, β-Al 2 O 3 ), 7,8 proton conductors (BaZr 0.1 Ce 0.7 Y 0.1 Yb 0.1 O 3 , Gd-doped BaCeO 3 ), 9,10 electronic conductors (Co 2 MnO 4 ), 11 semiconductors (SiC, ZnO, TiO 2 ), [12][13][14] insulators (PZT, Al 2 O 3 , NaNbO 3 , MgTiO 3 ). [15][16][17][18] However, most studies on the flash sintering have concentrated on single phase ceramic materials. Only a few investigations have been reported on the flash sintering of the ceramic composites.…”

Selective laser flash sintering of 8‐YSZ

“…If the power supply is switched from voltage to current control, final densification can be achieved during stage III flash sintering . The flash sintering effect has been demonstrated on a wide variety of ceramics including oxides and carbides that have a range of band gaps from semiconductors to insulators …”

“…2 The flash sintering effect has been demonstrated on a wide variety of ceramics including oxides and carbides that have a range of band gaps from semiconductors to insulators. [1][2][3][4][5][6][7][8][9][10] Previous studies have focused on flash sintering where heating was performed in a furnace so that the sample temperature was relatively uniform. 1,11,12 During uniform heating, stage I flash sintering is characterized by a small increase in current.…”