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设计、制备了三个系列(不同Bi_2O_3与Sb_2O_3掺杂浓度)的ZnO基复合材料.力学性能测试的结果表明.Bi含量(2%,原子分数)保持不变,随Sb含量(在合适的剂量范围内)的增大,由于基质ZnO晶粒减小,陶瓷致密度增大,所得材料的模量、抗弯强度以及断裂韧性均增大;Sb含量(3%,原子分数)保持不变,随Bi含量的增大,由于基质ZnO晶粒增大、陶瓷致密度减小,所得材料的模量、抗弯强度以及断裂韧性均减小.在设汁组成范围内材料的最佳力学性能约为:弹性模量114 GPa,弯曲模量115 GPa,抗弯强度120 MPa,断裂韧性1.87 MPa·m~(1/2).
Three series of ZnO-based composites (different doping concentrations of Bi 2 O 3 and Sb 2 O 3) were designed and prepared.The results of the mechanical properties tests showed that the content of Bi (2%, atomic fraction) remained the same with the content of Sb (3%, atomic fraction) remained the same due to the decrease of matrix ZnO grains and the increase of ceramic densities, and the modulus, flexural strength and fracture toughness of the obtained materials increased. With the increase of Bi content, the decrease of ceramic densification due to the increase of matrix ZnO grain size, the decrease of the modulus, flexural strength and fracture toughness of the obtained material.The optimum mechanical properties of the material As follows: elastic modulus 114 GPa, flexural modulus 115 GPa, flexural strength 120 MPa, fracture toughness 1.87 MPa · m ~ (1/2).