ABSTRACT

The electric flash generated by an electric field aided the sintering of hydroxyapatite (HA) in relatively less time and at lower furnace temperatures than the conventional sintering method. The current work has reported a comparative study to explain thermodynamically the effects of the increasing DC electric field strength at 1000°C and 1100°C sintering furnace temperatures during flash sintering in terms of the grain growth and densification of the HA in air. The abrupt change in current density and conductivity of HA during the flash peak correlates the high grain growth and rapid densification with increasing electric field strength. The increased electric field strength reduced the power dissipation from the HA. The abrupt high-rise grain growth phenomenon during flash sintering might consist of the thermal effect and enhancement in ionic conductivity due to the application of an electric field.

摘要

与传统的烧结方法相比，电场产生的电闪光有助于在相对较短的时间和较低的炉温下烧结羟基磷灰石 (HA)。目前的工作报告了一项比较研究，以热力学解释在闪蒸烧结期间在 1000°C 和 1100°C 烧结炉温度下增加直流电场强度对空气中 HA 的晶粒生长和致密化的影响。闪光峰期间 HA 的电流密度和电导率的突然变化将高晶粒生长和快速致密化与增加的电场强度相关联。增加的电场强度降低了 HA 的功耗。