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Method for rapidly preparing aluminum nitride ceramic with high thermal conductivity and complex shape at low temperature
The invention provides a method for rapidly preparing high-thermal-conductivity complex-shape aluminum nitride ceramic at low temperature, and belongs to the technical field of ceramic material preparation. According to the method, a Y-Ca-Si ternary auxiliary agent and a microwave sintering process are utilized, and the sintering temperature can be reduced to 1600 DEG C or below. The mixed slurry adopts a multi-granularity powder compounding mode, large-particle aluminum nitride powder is used as a sintering and heat-conducting framework material, sintering is promoted by using high activity provided by nano-particles, and a calcined green body has the relative density of 90%, so that the sintering time is further shortened. The characteristic that the silicone rubber is flowable before curing is utilized, so that the silicone rubber has the characteristic of filling a mold with a complex shape, and forming arbitrariness is achieved. The aluminum nitride ceramic obtained by the method has the characteristics of low energy consumption, rapid preparation, complex shape formability and high thermal conductivity (150-175W/m.k).
本发明提供了一种低温快速制备高导热复杂形状氮化铝陶瓷的方法，属于陶瓷材料制备技术领域。所述方法利用Y‑Ca‑Si三元助剂与微波烧结工艺，能够将使烧结温度降低至1600℃以下。混合浆料采用多粒度粉末复配的方式，以大颗粒氮化铝粉末为烧结与导热的骨架材料，利用纳米颗粒提供的高活性促进烧结，煅烧后的坯体具有90％的相对密度，有利于进一步缩短烧结时间。利用硅橡胶固化前的可流动的特点，具有填充复杂形状模具的特点，做到成形的任意性。此方法获得的氮化铝陶瓷兼具了低能耗、快速制备、复杂形状成形性与高导热(150～175W/m·k)的特点。
Method for rapidly preparing aluminum nitride ceramic with high thermal conductivity and complex shape at low temperature
The invention provides a method for rapidly preparing high-thermal-conductivity complex-shape aluminum nitride ceramic at low temperature, and belongs to the technical field of ceramic material preparation. According to the method, a Y-Ca-Si ternary auxiliary agent and a microwave sintering process are utilized, and the sintering temperature can be reduced to 1600 DEG C or below. The mixed slurry adopts a multi-granularity powder compounding mode, large-particle aluminum nitride powder is used as a sintering and heat-conducting framework material, sintering is promoted by using high activity provided by nano-particles, and a calcined green body has the relative density of 90%, so that the sintering time is further shortened. The characteristic that the silicone rubber is flowable before curing is utilized, so that the silicone rubber has the characteristic of filling a mold with a complex shape, and forming arbitrariness is achieved. The aluminum nitride ceramic obtained by the method has the characteristics of low energy consumption, rapid preparation, complex shape formability and high thermal conductivity (150-175W/m.k).
本发明提供了一种低温快速制备高导热复杂形状氮化铝陶瓷的方法，属于陶瓷材料制备技术领域。所述方法利用Y‑Ca‑Si三元助剂与微波烧结工艺，能够将使烧结温度降低至1600℃以下。混合浆料采用多粒度粉末复配的方式，以大颗粒氮化铝粉末为烧结与导热的骨架材料，利用纳米颗粒提供的高活性促进烧结，煅烧后的坯体具有90％的相对密度，有利于进一步缩短烧结时间。利用硅橡胶固化前的可流动的特点，具有填充复杂形状模具的特点，做到成形的任意性。此方法获得的氮化铝陶瓷兼具了低能耗、快速制备、复杂形状成形性与高导热(150～175W/m·k)的特点。
Method for rapidly preparing aluminum nitride ceramic with high thermal conductivity and complex shape at low temperature
一种低温快速制备高导热复杂形状氮化铝陶瓷的方法
QIN MINGLI (Autor:in) / ZHANG ZHIRUI (Autor:in) / WU HAOYANG (Autor:in) / LI TAO (Autor:in) / ZHANG ZEPENG (Autor:in) / GAO JIHANG (Autor:in) / JIA BAORUI (Autor:in) / QU XUANHUI (Autor:in)
10.10.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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