Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation method of high-strength semitransparent aluminum oxide ceramic
The invention discloses a preparation method of high-strength semitransparent aluminum oxide ceramic, which comprises the following steps: adding a sintering agent into aluminum oxide powder in a chemical indirect mode or a physical mixing direct mode, carrying out granulating, preparing a blank, sintering aluminum oxide ceramic at high temperature, and polishing the aluminum oxide ceramic to obtain the high-strength semitransparent aluminum oxide ceramic. The semitransparent aluminum oxide ceramic prepared by selecting aluminum oxide powder with the particle size D50 smaller than or equal to150nm and the specific surface area BET larger than or equal to 14m<2>/g and using pressureless sintering equipment at the temperature ranging from 1350 DEG C to 1500 DEG C has good mechanical properties, and the growth of crystal grains of the aluminum oxide ceramic in the later sintering period can be inhibited, and the mechanical property of the aluminum oxide ceramic is improved. Moreover, noauxiliary pressure condition is needed when the semitransparent aluminum oxide ceramic is prepared, and the cost of the sintering equipment is far lower than that of pressure-assisted sintering equipment such as HP, HIP and SPS, so that the cost of the semitransparent aluminum oxide ceramic is reduced. In addition, the sintering equipment is not limited by the size and shape of a green body duringsintering.
本发明公开了一种高强度半透明的氧化铝陶瓷制备方法，首先通过化学间接的方式或者物理混合直接的方式将烧结剂添加到氧化铝粉末中，然后经过造粒、坯体制备、氧化铝陶瓷高温烧结以及打磨得到高强度的半透明的氧化铝陶瓷。本发明选用粒径D≤150nm、比表面积BET≥14m/g氧化铝粉末并采用无压力烧结设备在1350°C~1500°C制备的半透明的氧化铝陶瓷具有好的力学性能，并且本发明能抑制氧化铝陶瓷在烧结后期晶粒的长大，提高氧化铝陶瓷的力学性能。此外，本发明制备半透明的氧化铝陶瓷时不需要任何辅助压力条件，其烧结设备的成本远低于HP、HIP、SPS等压力辅助烧结的设备，从而降低半透明的氧化铝陶瓷成本，此外，本发明中的烧结设备在烧结时不受坯体的尺寸和形状限制。
Preparation method of high-strength semitransparent aluminum oxide ceramic
The invention discloses a preparation method of high-strength semitransparent aluminum oxide ceramic, which comprises the following steps: adding a sintering agent into aluminum oxide powder in a chemical indirect mode or a physical mixing direct mode, carrying out granulating, preparing a blank, sintering aluminum oxide ceramic at high temperature, and polishing the aluminum oxide ceramic to obtain the high-strength semitransparent aluminum oxide ceramic. The semitransparent aluminum oxide ceramic prepared by selecting aluminum oxide powder with the particle size D50 smaller than or equal to150nm and the specific surface area BET larger than or equal to 14m<2>/g and using pressureless sintering equipment at the temperature ranging from 1350 DEG C to 1500 DEG C has good mechanical properties, and the growth of crystal grains of the aluminum oxide ceramic in the later sintering period can be inhibited, and the mechanical property of the aluminum oxide ceramic is improved. Moreover, noauxiliary pressure condition is needed when the semitransparent aluminum oxide ceramic is prepared, and the cost of the sintering equipment is far lower than that of pressure-assisted sintering equipment such as HP, HIP and SPS, so that the cost of the semitransparent aluminum oxide ceramic is reduced. In addition, the sintering equipment is not limited by the size and shape of a green body duringsintering.
本发明公开了一种高强度半透明的氧化铝陶瓷制备方法，首先通过化学间接的方式或者物理混合直接的方式将烧结剂添加到氧化铝粉末中，然后经过造粒、坯体制备、氧化铝陶瓷高温烧结以及打磨得到高强度的半透明的氧化铝陶瓷。本发明选用粒径D≤150nm、比表面积BET≥14m/g氧化铝粉末并采用无压力烧结设备在1350°C~1500°C制备的半透明的氧化铝陶瓷具有好的力学性能，并且本发明能抑制氧化铝陶瓷在烧结后期晶粒的长大，提高氧化铝陶瓷的力学性能。此外，本发明制备半透明的氧化铝陶瓷时不需要任何辅助压力条件，其烧结设备的成本远低于HP、HIP、SPS等压力辅助烧结的设备，从而降低半透明的氧化铝陶瓷成本，此外，本发明中的烧结设备在烧结时不受坯体的尺寸和形状限制。
Preparation method of high-strength semitransparent aluminum oxide ceramic
一种高强度半透明的氧化铝陶瓷制备方法
WANG CAIFEN (Autor:in) / ZHANG XIANGDONG (Autor:in) / REN JUNYE (Autor:in) / YUE YINGLEI (Autor:in) / DONG JIALIN (Autor:in) / CHEN JIEMIN (Autor:in) / YANG YONGZHONG (Autor:in) / WANG YUWEI (Autor:in) / LI XIANRONG (Autor:in) / XU HAIYAN (Autor:in)
15.05.2020
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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