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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Performance investigation of Li _2O-Al _2O _3-4SiO _2 based glass-ceramics with B _2O _3, Na _3AlF _6 and Na _2O fluxes
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Performance investigation of Li _2O-Al _2O _3-4SiO _2 based glass-ceramics with B _2O _3, Na _3AlF _6 and Na _2O fluxes

机译：具有B _2O _3，Na _3AlF _6和Na _2O助熔剂的Li _2O-Al _2O _3-4SiO _2基玻璃陶瓷的性能研究

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摘要

Influence of single fluxes (10 wt.% B _2O _3), bi-component fluxes (4 wt.% B _2O _3 + 6 wt.% Na _3AlF _6), and complex fluxes (4 wt.% B _2O _3 + 4 wt.% Na _3AlF _6 + 2 wt.% Na _2O) on the thermal kinetic parameters, microstructure, flexural strength and coefficient of thermal expansion (CTE) of Li _2O-Al _2O _3-4SiO _2 (LAS) glass-ceramics was investigated through differential thermal analysis (DTA), X-ray diffraction (XRD), and scanning electron microscope (SEM). The results showed that complex fluxes could efficiently decrease transition temperature (T _g) and crystallization temperature (T _p), and accelerate the formation of needle-like β-spodumene crystals which benefit high flexural strength. The homogeneous LAS glass-ceramic (sample C _3) which has a high strength of 132.4 MPa and low CTE (100-650 °C) of 2.74 × 10 ~(- 6)/°C is obtained by doping of the initial LAS glass by complex fluxes of 4 wt.% B _2O _3, 4 wt.% Na _3AlF _6, and 2 wt.% Na _2O, nucleating at 630 °C/120 min and then crystallized at 780 °C/120 min. It is worthy of further investigation as a bonder of diamond composite material due to its outstanding prosperities.
机译：单焊剂（10 wt。％B _2O _3），双组分焊剂（4 wt。％B _2O _3 + 6 wt。％Na _3AlF _6）和复焊剂（4 wt。％B _2O _3 + 4 wt。研究了。％Na _3AlF _6 + 2 wt。％Na _2O对Li _2O-Al _2O _3-4SiO _2（LAS）微晶玻璃的热力学参数，微观结构，抗弯强度和热膨胀系数（CTE）的影响差热分析（​​DTA），X射线衍射（XRD）和扫描电子显微镜（SEM）。结果表明，复熔剂可以有效降低转变温度（T _g）和结晶温度（T _p），并加速形成有利于高弯曲强度的针状β-锂辉石晶体。通过对初始LAS玻璃进行掺杂，可以获得具有132.4 MPa的高强度和2.74×10〜（-6）/°C的低CTE（100-650°C）的均质LAS玻璃陶瓷（样品C _3）通过在630℃/ 120min下成核然后在780℃/ 120min下结晶得到4wt。％B _2O _3、4wt。％Na _3AlF_6和2wt。％Na _2O的复合通量。由于其出色的性能，作为金刚石复合材料的粘接剂，值得进一步研究。

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