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Boron nitride blocky ceramic and preparation method thereof
The invention discloses boron nitride blocky ceramic and a preparation method thereof. The boron nitride blocky ceramic is prepared by converting borazine and polymers of borazine and is free of impurity element, the purity of the ceramic is greater than 99.9%, the density of the ceramic is greater than 92%, the heat conductivity of the ceramic is 2.86-4.56W.m<-1>.K<-1>, and the dielectric constant of the ceramic is 3.6-4.4. The preparation method comprises the following steps: (1) forming precursor polymer powder; (2) sintering a framework; (3) soaking and performing cross-linking curing on the precursor; (4) performing ceramic cracking and conversion; (5) repeating the soaking and cracking operation of the step (3) and the step (4) for 0-5 times, thereby obtaining the boron nitride blocky ceramic. The preparation method has the advantages of controllable process, simplicity in operation, easiness in formation, and the like, the prepared boron nitride blocky ceramic is high in purity, high in density, and good in thermal and dielectric property, and can be used for preparing electronic devices and aerospace wave-transparent components with high precision.
Boron nitride blocky ceramic and preparation method thereof
The invention discloses boron nitride blocky ceramic and a preparation method thereof. The boron nitride blocky ceramic is prepared by converting borazine and polymers of borazine and is free of impurity element, the purity of the ceramic is greater than 99.9%, the density of the ceramic is greater than 92%, the heat conductivity of the ceramic is 2.86-4.56W.m<-1>.K<-1>, and the dielectric constant of the ceramic is 3.6-4.4. The preparation method comprises the following steps: (1) forming precursor polymer powder; (2) sintering a framework; (3) soaking and performing cross-linking curing on the precursor; (4) performing ceramic cracking and conversion; (5) repeating the soaking and cracking operation of the step (3) and the step (4) for 0-5 times, thereby obtaining the boron nitride blocky ceramic. The preparation method has the advantages of controllable process, simplicity in operation, easiness in formation, and the like, the prepared boron nitride blocky ceramic is high in purity, high in density, and good in thermal and dielectric property, and can be used for preparing electronic devices and aerospace wave-transparent components with high precision.
Boron nitride blocky ceramic and preparation method thereof
ZOU CHUNRONG (author) / LI BIN (author) / ZHANG CHANGRUI (author) / WANG SIQING (author)
2015-09-30
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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