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Silicon nitride whisker reinforced silicon carbide/polymer composite material and preparation method thereof
The invention discloses a silicon nitride whisker reinforced silicon carbide/polymer composite material and a preparation method thereof, and belongs to the technical field of polymer composite materials. The silicon nitride whisker reinforced silicon carbide/polymer composite material comprises a polymer, a curing agent, an accelerant and a heat-conducting filler, the heat-conducting filler is a three-dimensional silicon nitride whisker reinforced silicon carbide network skeleton. The preparation method of the three-dimensional silicon nitride whisker reinforced silicon carbide network skeleton comprises the following steps: dissolving an adhesive in a solvent, then adding mixed powder and a dispersing agent, uniformly mixing to obtain a turbid liquid, then carrying out directional freeze molding on the turbid liquid, and carrying out freeze drying to obtain a three-dimensional silicon/silicon carbide-containing raw material powder skeleton, and finally, sintering in a nitrogen-containing atmosphere to obtain a three-dimensional silicon nitride whisker reinforced silicon carbide network skeleton. The mixed powder is prepared from purified photovoltaic crystal silicon cutting waste mortar and a sintering aid. The silicon nitride whisker reinforced silicon carbide/polymer composite material has the advantages of high thermal conductivity, good bending strength and the like.
本发明公开了一种氮化硅晶须增强碳化硅/聚合物复合材料及其制备方法，属于聚合物复合材料技术领域。该氮化硅晶须增强碳化硅/聚合物复合材料包括聚合物、固化剂、促进剂和导热填料；所述导热填料为三维氮化硅晶须增强碳化硅网络骨架。所述三维氮化硅晶须增强碳化硅网络骨架的制备包括以下步骤：将粘合剂溶解于溶剂中，再加入混合粉体和分散剂混合均匀得到悬浊液，接下来对悬浊液进行定向冷冻成型，并经冷冻干燥后得到三维含硅/碳化硅原料粉体骨架，最后在含氮气氛下烧结后得到三维氮化硅晶须增强碳化硅网络骨架；所述混合粉体为提纯光伏晶硅切割废砂浆和烧结助剂。本发明的氮化硅晶须增强碳化硅/聚合物复合材料具有热导率高和抗弯强度好等优点。
Silicon nitride whisker reinforced silicon carbide/polymer composite material and preparation method thereof
The invention discloses a silicon nitride whisker reinforced silicon carbide/polymer composite material and a preparation method thereof, and belongs to the technical field of polymer composite materials. The silicon nitride whisker reinforced silicon carbide/polymer composite material comprises a polymer, a curing agent, an accelerant and a heat-conducting filler, the heat-conducting filler is a three-dimensional silicon nitride whisker reinforced silicon carbide network skeleton. The preparation method of the three-dimensional silicon nitride whisker reinforced silicon carbide network skeleton comprises the following steps: dissolving an adhesive in a solvent, then adding mixed powder and a dispersing agent, uniformly mixing to obtain a turbid liquid, then carrying out directional freeze molding on the turbid liquid, and carrying out freeze drying to obtain a three-dimensional silicon/silicon carbide-containing raw material powder skeleton, and finally, sintering in a nitrogen-containing atmosphere to obtain a three-dimensional silicon nitride whisker reinforced silicon carbide network skeleton. The mixed powder is prepared from purified photovoltaic crystal silicon cutting waste mortar and a sintering aid. The silicon nitride whisker reinforced silicon carbide/polymer composite material has the advantages of high thermal conductivity, good bending strength and the like.
本发明公开了一种氮化硅晶须增强碳化硅/聚合物复合材料及其制备方法，属于聚合物复合材料技术领域。该氮化硅晶须增强碳化硅/聚合物复合材料包括聚合物、固化剂、促进剂和导热填料；所述导热填料为三维氮化硅晶须增强碳化硅网络骨架。所述三维氮化硅晶须增强碳化硅网络骨架的制备包括以下步骤：将粘合剂溶解于溶剂中，再加入混合粉体和分散剂混合均匀得到悬浊液，接下来对悬浊液进行定向冷冻成型，并经冷冻干燥后得到三维含硅/碳化硅原料粉体骨架，最后在含氮气氛下烧结后得到三维氮化硅晶须增强碳化硅网络骨架；所述混合粉体为提纯光伏晶硅切割废砂浆和烧结助剂。本发明的氮化硅晶须增强碳化硅/聚合物复合材料具有热导率高和抗弯强度好等优点。
Silicon nitride whisker reinforced silicon carbide/polymer composite material and preparation method thereof
一种氮化硅晶须增强碳化硅/聚合物复合材料及其制备方法
XIANG DAOPING (Autor:in) / YAO JIAN (Autor:in)
30.06.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C08L
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
,
Massen auf Basis makromolekularer Verbindungen
/
C04B
Kalk
,
LIME
/
C08K
Verwendung von anorganischen oder nichtmakromolekularen organischen Stoffen als Zusatzstoffe
,
USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES AS COMPOUNDING INGREDIENTS
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