Abstract：
Si3N4 bioceramics were fabricated using GPS and SPS method with MgO-RE2O3 (RE = La, Nd, Gd, Ho and Lu) sintering additives. The effect of sintering methods and sintering additives on the grain growth, mechanical, antimicrobial properties and color of Si3N4 bioceramics were studied. Samples sintered with GPS are composed of β-Si3N4 and samples sintered with SPS are composed of α-Si3N4 and β-Si3N4. The growth of β-Si3N4 grains in samples sintered with GPS are more adequate. Samples sintered with GPS exhibit a S. aureus inactivation rate up to 98% and a bright color appearance with a hardness of about 13 GPa and a fracture toughness up to 7.5 MPa m1/2, suitable for dental implants. And samples sintered with SPS exhibit a hardness of about 17 GPa and a fracture toughness about 6 MPa m1/2.
摘要：
Si3N4生物陶瓷是使用GPS和SPS方法与MgO-RE2O3（RE=La，Nd,Gd,Ho和Lu)烧结添加剂。烧结方法和烧结添加剂对晶粒长大的影响，机械,研究了Si3N4生物陶瓷的抗菌性能和颜色。用GPS烧结的样品由β-Si3N4组成,用SPS烧结的样品由α-Si3N4和β-Si3N4组成。用GPS烧结的样品中β-Si3N4晶粒的生长更充分。用GPS烧结的样品表现出高达98％的金黄色葡萄球菌失活率和明亮的颜色外观，硬度约为13GPa，断裂韧性高达7.5MPam1/2，适用于牙科植入物。用SPS烧结的样品表现出约17GPa的硬度和约6MPa的m1/2的断裂韧性。
