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Spherical hexagonal boron nitride and preparation method thereof
The invention discloses spherical hexagonal boron nitride and a preparation method thereof, and belongs to the technical field of boron nitride materials.The preparation method comprises the steps that hexagonal boron nitride, auxiliary materials and pure water are prepared into slurry with the viscosity being 55-85 ku, then the slurry is subjected to spray granulation to obtain spherical particles, and the spherical particles are dried to obtain the hexagonal boron nitride. The spherical particles are formed by gathering hexagonal boron nitride primary particles in a continuous bridging lap joint mode, the hexagonal boron nitride primary particles are in a prismatic surface and plane contact state, and finally, through glue discharging and sintering, the bridging lap joint gathering mode of boron nitride lamellar crystals is fixed, and the spherical hexagonal boron nitride is obtained. Primary particles of the spherical hexagonal boron nitride are in a state of mutual contact between planes and prismatic surfaces, a continuous heat conduction channel is easily formed, 40% of the spherical hexagonal boron nitride is mixed with 60% of the silicone oil, the viscosity is 30-75 thousand mPa.s, the heat conductivity is 2-4 W/m.K, and the spherical hexagonal boron nitride can be widely applied to the field of heat conduction.
本申请公开了一种球形六方氮化硼及其制备方法，属于氮化硼材料技术领域，该制备方法是先将六方氮化硼、辅料和纯水制成粘度为55~85ku的浆料，再将该浆料通过喷雾造粒得到球形颗粒，该球形颗粒由六方氮化硼一次粒子通过连续架桥搭接方式聚集而成，且六方氮化硼一次粒子呈棱面与平面接触状态，最后通过排胶、烧结，将氮化硼片晶的架桥搭接聚集方式固定，得到球形六方氮化硼。该球形六方氮化硼的一次粒子呈平面与棱面相互接触的状态，容易形成连续的导热通道，且40%球形六方氮化硼与60%硅油混合，粘度在30~75万mPa.s，热导率在2~4 W/m.K，可广泛用于导热领域。
Spherical hexagonal boron nitride and preparation method thereof
The invention discloses spherical hexagonal boron nitride and a preparation method thereof, and belongs to the technical field of boron nitride materials.The preparation method comprises the steps that hexagonal boron nitride, auxiliary materials and pure water are prepared into slurry with the viscosity being 55-85 ku, then the slurry is subjected to spray granulation to obtain spherical particles, and the spherical particles are dried to obtain the hexagonal boron nitride. The spherical particles are formed by gathering hexagonal boron nitride primary particles in a continuous bridging lap joint mode, the hexagonal boron nitride primary particles are in a prismatic surface and plane contact state, and finally, through glue discharging and sintering, the bridging lap joint gathering mode of boron nitride lamellar crystals is fixed, and the spherical hexagonal boron nitride is obtained. Primary particles of the spherical hexagonal boron nitride are in a state of mutual contact between planes and prismatic surfaces, a continuous heat conduction channel is easily formed, 40% of the spherical hexagonal boron nitride is mixed with 60% of the silicone oil, the viscosity is 30-75 thousand mPa.s, the heat conductivity is 2-4 W/m.K, and the spherical hexagonal boron nitride can be widely applied to the field of heat conduction.
本申请公开了一种球形六方氮化硼及其制备方法，属于氮化硼材料技术领域，该制备方法是先将六方氮化硼、辅料和纯水制成粘度为55~85ku的浆料，再将该浆料通过喷雾造粒得到球形颗粒，该球形颗粒由六方氮化硼一次粒子通过连续架桥搭接方式聚集而成，且六方氮化硼一次粒子呈棱面与平面接触状态，最后通过排胶、烧结，将氮化硼片晶的架桥搭接聚集方式固定，得到球形六方氮化硼。该球形六方氮化硼的一次粒子呈平面与棱面相互接触的状态，容易形成连续的导热通道，且40%球形六方氮化硼与60%硅油混合，粘度在30~75万mPa.s，热导率在2~4 W/m.K，可广泛用于导热领域。
Spherical hexagonal boron nitride and preparation method thereof
球形六方氮化硼及其制备方法
MA BAODONG (author) / YUE YANG (author) / SONG XIANHONG (author)
2023-04-18
Patent
Electronic Resource
Chinese
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