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Improved densification and properties of pressureless-sintered lithium disilicate glass-ceramics

机译：改进的无压烧结二硅酸锂玻璃陶瓷的致密化和性能

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摘要

Lithium disilicate glass-ceramics were pressureless sintered with glass powders derived from the SiO_2-Li_2O-P_2O_5-ZrO_2-Al_2O_3-K_2O-CeO_2 system. The effects of sintering temperature near the melting point of Li_2Si_2O_5 crystalline phases and particle size on the sintering behavior, microstructure, flexural strength and translucency of the Li_2Si_2O_5 glass-ceramics were studied. The specimens obtained from the coarse-glass powder with particle size of 50 μm (S50) presented much higher relative density, improved flexural strength and translucency. Melting of Li_2Si_2O_5 crystals and crystallization of the melted liquids took place in the sintering temperature range. The melting increased the relative density while it decreased the crystallinity. The crystallization of the melted liquids played an opposite role. Due to the proper crystals size, crystallinity (70.47 + 3.02%) and higher relative density (97.68 + 0.22%), good flexural strength (282 + 14 MPa) and comparable translucency as the commercially used Emax~® materials were achieved for the S50 specimens sintered at 910 ℃.
机译：将二硅酸锂玻璃陶瓷用源自SiO_2-Li_2O-P_2O_5-ZrO_2-Al_2O_3-K_2O-CeO_2系统的玻璃粉末进行无压烧结。研究了Li_2Si_2O_5晶相的熔点附近的烧结温度和粒度对Li_2Si_2O_5微晶玻璃的烧结行为，微观结构，弯曲强度和半透明性的影响。从粒径为50μm（S50）的粗玻璃粉末获得的样品呈现出更高的相对密度，改善的弯曲强度和半透明性。 Li_2Si_2O_5晶体的熔融和熔融液体的结晶在烧结温度范围内发生。熔融增加了相对密度，同时降低了结晶度。熔融液体的结晶起相反的作用。由于合适的晶体尺寸，结晶度（70.47 + 3.02％）和较高的相对密度（97.68 + 0.22％），良好的抗弯强度（282 + 14 MPa）和与S50商用Emax®材料相当的半透明性标本在910℃下烧结。

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  • 来源
    《Materials Science and Engineering》 |2015年第3期|399-406|共8页
  • 作者

    Ting Zhao; Yi Oin; Bo Wang; Jian-Feng Yang;

  • 作者单位

    State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, PR China;

    State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, PR China;

    State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, PR China;

    State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, PR China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Lithium disilicate; Sintering temperature; Particle size; Flexural strength; Translucency;

    机译：二硅酸锂;烧结温度粒度;抗弯强度;半透明;

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