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Preparation method of ZrC/ZrB2 multiphase porous ultra-high temperature ceramic
The invention discloses a preparation method of a ZrC/ZrB2 multiphase porous ultra-high temperature ceramic. The method is implemented according to the following steps of: 1, preparation of a water-based slurry: dissolving a dispersant in water to obtain a dispersant-containing water solution, mixing the dispersant-containing water solution with a zirconium-containing polymer and a boron source, and carrying out ball milling to obtain the water-based slurry; 2, cross-linking treatment: injecting the water-based slurry into a mold, and carrying out cross-linking treatment to obtain a green body; 3, freeze drying: freezing the green body at a low temperature, then performing drying, and removing ice crystals in the green body to obtain a porous green body; and 4, high-temperature cracking: carrying out high-temperature cracking on the porous green body to obtain the ZrC/ZrB2 multiphase porous ultra-high temperature ceramic. According to the invention, the morphology of the porous structure is regulated and controlled by adopting the cross-linking effect between high polymer materials, the simple process and rich pore structures of a freeze-drying method are combined, the advantages of a zirconium-containing polymer are also considered, the preparation process is simple, the cost is low, and the porosity of the prepared finished product is high.
本发明公开了一种ZrC/ZrB2复相多孔超高温陶瓷的制备方法，按照以下步骤实施：步骤1，配制水性浆料：将分散剂溶于水中得到含分散剂的水溶液，与含锆聚合物和硼源混合，球磨得到水性浆料；步骤2，交联处理：将水性浆料注入模具，交联处理得到素坯；步骤3，冷冻干燥：将素坯在低温进行冷冻，再进行干燥，去除坯体中的冰晶得到多孔坯体；步骤4，高温裂解：将多孔坯体进行高温裂解得到ZrC/ZrB2复相多孔超高温陶瓷。本发明采用了高分子材料之间的交联作用调控多孔结构的形貌，既结合了冷冻干燥法的工艺简单和孔结构丰富，又兼顾了含锆聚合物的优点，其制备工艺简单、成本低廉和制得成品孔隙率高。
Preparation method of ZrC/ZrB2 multiphase porous ultra-high temperature ceramic
The invention discloses a preparation method of a ZrC/ZrB2 multiphase porous ultra-high temperature ceramic. The method is implemented according to the following steps of: 1, preparation of a water-based slurry: dissolving a dispersant in water to obtain a dispersant-containing water solution, mixing the dispersant-containing water solution with a zirconium-containing polymer and a boron source, and carrying out ball milling to obtain the water-based slurry; 2, cross-linking treatment: injecting the water-based slurry into a mold, and carrying out cross-linking treatment to obtain a green body; 3, freeze drying: freezing the green body at a low temperature, then performing drying, and removing ice crystals in the green body to obtain a porous green body; and 4, high-temperature cracking: carrying out high-temperature cracking on the porous green body to obtain the ZrC/ZrB2 multiphase porous ultra-high temperature ceramic. According to the invention, the morphology of the porous structure is regulated and controlled by adopting the cross-linking effect between high polymer materials, the simple process and rich pore structures of a freeze-drying method are combined, the advantages of a zirconium-containing polymer are also considered, the preparation process is simple, the cost is low, and the porosity of the prepared finished product is high.
本发明公开了一种ZrC/ZrB2复相多孔超高温陶瓷的制备方法，按照以下步骤实施：步骤1，配制水性浆料：将分散剂溶于水中得到含分散剂的水溶液，与含锆聚合物和硼源混合，球磨得到水性浆料；步骤2，交联处理：将水性浆料注入模具，交联处理得到素坯；步骤3，冷冻干燥：将素坯在低温进行冷冻，再进行干燥，去除坯体中的冰晶得到多孔坯体；步骤4，高温裂解：将多孔坯体进行高温裂解得到ZrC/ZrB2复相多孔超高温陶瓷。本发明采用了高分子材料之间的交联作用调控多孔结构的形貌，既结合了冷冻干燥法的工艺简单和孔结构丰富，又兼顾了含锆聚合物的优点，其制备工艺简单、成本低廉和制得成品孔隙率高。
Preparation method of ZrC/ZrB2 multiphase porous ultra-high temperature ceramic
一种ZrC/ZrB2复相多孔超高温陶瓷的制备方法
ZHAO KANG (Autor:in) / WANG KAI (Autor:in) / MENG QINGNAN (Autor:in) / TANG YUFEI (Autor:in) / HU HUATING (Autor:in) / XU ZHUOLI (Autor:in)
15.12.2020
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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