Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
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Preparation method of fine-grain oxide ceramic
The invention discloses a method for preparing fine-grain oxide ceramic through electric field assisted rapid sintering. The method comprises the following steps: step 1, preparing coating powder through a hydrolysis precipitation method, and carrying out mold pressing to obtain a green body; 2, heating the green body in the step 1 to a preset temperature T, wherein T is more than or equal to 300 DEG C and less than or equal to 1300 DEG C; 3, putting the blank heated in the step 2 into a direct-current electric field, and carrying out flash burning under preset electric field intensity E and alternating current density J; wherein 60 V/cm < = E < = 1500 V/cm, and 5 mA/mm < 2 > < = J < = 200 mA/mm < 2 >; 4, after flash burning, the current density J is kept for a period of time t; removing the applied direct-current electric field, and cooling the green body to room temperature to obtain a fine-grain oxide ceramic block body; the method has the advantage of effectively inhibiting grain growth in the ceramic sintering process, and a new way is provided for preparation of fine-grain oxide ceramics.
本发明公开了一种电场辅助下快速烧结制备细晶氧化物陶瓷的方法，包括以下步骤：步骤1：通过水解沉淀法制备包覆粉体并经模压得到坯体；步骤2：将步骤1中的坯体加热到预设温度T，其中300℃≤T≤1300℃；步骤3：将步骤2加热后的坯体放入直流电场内，在预设电场强度E和交电流密度J下发生闪烧；其中60V/cm≤E≤1500V/cm，5mA/mm2≤J≤200mA/mm2；步骤4：发生闪烧后保持电流密度J一段时间t；去掉施加直流电场，将坯体冷却到室温，即可得到细晶氧化物陶瓷块体；本发明具有有效抑制陶瓷烧结过程中晶粒长大的优点，为细晶氧化物陶瓷的制备提供了新的途径。
Preparation method of fine-grain oxide ceramic
The invention discloses a method for preparing fine-grain oxide ceramic through electric field assisted rapid sintering. The method comprises the following steps: step 1, preparing coating powder through a hydrolysis precipitation method, and carrying out mold pressing to obtain a green body; 2, heating the green body in the step 1 to a preset temperature T, wherein T is more than or equal to 300 DEG C and less than or equal to 1300 DEG C; 3, putting the blank heated in the step 2 into a direct-current electric field, and carrying out flash burning under preset electric field intensity E and alternating current density J; wherein 60 V/cm < = E < = 1500 V/cm, and 5 mA/mm < 2 > < = J < = 200 mA/mm < 2 >; 4, after flash burning, the current density J is kept for a period of time t; removing the applied direct-current electric field, and cooling the green body to room temperature to obtain a fine-grain oxide ceramic block body; the method has the advantage of effectively inhibiting grain growth in the ceramic sintering process, and a new way is provided for preparation of fine-grain oxide ceramics.
本发明公开了一种电场辅助下快速烧结制备细晶氧化物陶瓷的方法，包括以下步骤：步骤1：通过水解沉淀法制备包覆粉体并经模压得到坯体；步骤2：将步骤1中的坯体加热到预设温度T，其中300℃≤T≤1300℃；步骤3：将步骤2加热后的坯体放入直流电场内，在预设电场强度E和交电流密度J下发生闪烧；其中60V/cm≤E≤1500V/cm，5mA/mm2≤J≤200mA/mm2；步骤4：发生闪烧后保持电流密度J一段时间t；去掉施加直流电场，将坯体冷却到室温，即可得到细晶氧化物陶瓷块体；本发明具有有效抑制陶瓷烧结过程中晶粒长大的优点，为细晶氧化物陶瓷的制备提供了新的途径。
Preparation method of fine-grain oxide ceramic
一种细晶氧化物陶瓷的制备方法
REN KE (Autor:in) / PI HUILONG (Autor:in) / DAI JUNHONG (Autor:in) / WANG YIGUANG (Autor:in)
13.05.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
Fine-grain pink ZTA ceramic and preparation method thereof
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