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Preparation method of fly ash porous hollow microspheres with controllable aperture
The invention relates to a preparation method of pore-size-controllable fly ash porous hollow microspheres, which can be used for preparing pore-size-controllable fly ash porous hollow microspheres, and the specific process is as follows: a fly ash hollow microsphere FAC raw material is sequentially sieved by a 150-mesh sieve, and the obtained undersize part is in a first particle size range; continuously sieving with the 60-mesh sieve to obtain an undersize part in a second particle size range; continuing to pass through the 35-mesh sieve to obtain an undersize part in a third particle size range, and abandoning an oversize part of the 35-mesh sieve; measuring the density of the fly ash hollow microspheres FAC in different particle size ranges; according to the method, a focused ion beam method is adopted to carry out nanoscale aperture processing on fly ash hollow microspheres FAC, an ion source is a liquid gallium ion source, and the working distance is selected to be 5mm: firstly, according to the density of the fly ash hollow microspheres FAC in different particle size ranges, the acceleration voltage of a focused ion beam is determined; and then determining the scanning speed of the focused ion beam according to the particle size range. The pore size of the microbead obtained by the method is controllable and nanoscale, and the requirements of low heat conductivity coefficient and high strength can be met.
本发明为一种孔径可控的粉煤灰多孔空心微珠制备方法，能制备孔径可控的粉煤灰多孔空心微珠，具体过程是：对粉煤灰空心微珠FAC原料依次过150目筛，得到筛下部分为第一粒径范围；之后继续过60目筛，得到筛下部分为第二粒径范围；再继续过35目筛，得到筛下部分为第三粒径范围，35目筛筛上部分舍弃；测量不同粒径范围下粉煤灰空心微珠FAC的密度；采用聚焦离子束法对粉煤灰空心微珠FAC进行纳米级孔径加工，离子源选用液态镓离子源，工作距离选择5mm：首先根据不同粒径范围下粉煤灰空心微珠FAC的密度确定聚焦离子束的加速电压；之后根据粒径范围确定聚焦离子束的扫描速度。该方法获得的微珠孔径大小可控且为纳米级，能够兼顾低导热系数和高强度要求。
Preparation method of fly ash porous hollow microspheres with controllable aperture
The invention relates to a preparation method of pore-size-controllable fly ash porous hollow microspheres, which can be used for preparing pore-size-controllable fly ash porous hollow microspheres, and the specific process is as follows: a fly ash hollow microsphere FAC raw material is sequentially sieved by a 150-mesh sieve, and the obtained undersize part is in a first particle size range; continuously sieving with the 60-mesh sieve to obtain an undersize part in a second particle size range; continuing to pass through the 35-mesh sieve to obtain an undersize part in a third particle size range, and abandoning an oversize part of the 35-mesh sieve; measuring the density of the fly ash hollow microspheres FAC in different particle size ranges; according to the method, a focused ion beam method is adopted to carry out nanoscale aperture processing on fly ash hollow microspheres FAC, an ion source is a liquid gallium ion source, and the working distance is selected to be 5mm: firstly, according to the density of the fly ash hollow microspheres FAC in different particle size ranges, the acceleration voltage of a focused ion beam is determined; and then determining the scanning speed of the focused ion beam according to the particle size range. The pore size of the microbead obtained by the method is controllable and nanoscale, and the requirements of low heat conductivity coefficient and high strength can be met.
本发明为一种孔径可控的粉煤灰多孔空心微珠制备方法，能制备孔径可控的粉煤灰多孔空心微珠，具体过程是：对粉煤灰空心微珠FAC原料依次过150目筛，得到筛下部分为第一粒径范围；之后继续过60目筛，得到筛下部分为第二粒径范围；再继续过35目筛，得到筛下部分为第三粒径范围，35目筛筛上部分舍弃；测量不同粒径范围下粉煤灰空心微珠FAC的密度；采用聚焦离子束法对粉煤灰空心微珠FAC进行纳米级孔径加工，离子源选用液态镓离子源，工作距离选择5mm：首先根据不同粒径范围下粉煤灰空心微珠FAC的密度确定聚焦离子束的加速电压；之后根据粒径范围确定聚焦离子束的扫描速度。该方法获得的微珠孔径大小可控且为纳米级，能够兼顾低导热系数和高强度要求。
Preparation method of fly ash porous hollow microspheres with controllable aperture
一种孔径可控的粉煤灰多孔空心微珠制备方法
XIE PANPAN (author) / LI JIAWEI (author) / WANG YUNPENG (author)
2024-09-20
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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