Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Rapid sintering preparation method of Li4Ti5O12 ceramic target material
The invention provides a rapid sintering preparation method of a Li4Ti5O12 ceramic target material, and belongs to the technical field of preparation of ceramic target materials. The preparation method comprises the following steps of: 1) compression molding: putting Li4Ti5O12 powder into a hard alloy mold, carrying out compression molding, and performing demolding to obtain a flash burning precursor mold-pressed biscuit; (2) cold isostatic pressing molding: carrying out cold isostatic pressing treatment on the flash burning precursor mold-pressed biscuit to obtain a final biscuit; and (3) rapid sintering: heating the final biscuit in a protective atmosphere, keeping the temperature constant under the condition that the temperature reaches a flash burning temperature, applying direct current to the two ends of the biscuit, starting flash burning under the condition that the voltage required by flash burning is obtained, then controlling flash burning for a period of time with a constant current value, and obtaining a compact Li4Ti5O12 sintered body after completing the flash burning. According to the method, the flash burning is used for integrally heating the blank body through anelectro-thermal conversion effect, and almost all heat generated by current is used for sintering the blank body. The method has the advantages of ultra-fast densification, inhibition of grain growth, low energy consumption, inhibition of Li volatilization and the like.
本发明提供一种Li4Ti5O12陶瓷靶材的快速烧结制备方法，属于陶瓷靶材的制备技术领域。包括：1)模压成型：将Li4Ti5O12粉末装入硬质合金模具中，进行模压成型，脱膜后得到闪烧前驱体模压素坯；2)冷等静压成型：将闪烧前驱体模压素坯经过冷等静压处理后，得到最终素坯；3)快速烧结：将最终素坯在保护性气氛下加热升温，当达到闪烧温度时恒温保持，并在素坯两端施加直流电，当达到闪烧所需电压时开始发生闪烧，随后以恒定的电流值控制闪烧持续一段时间，闪烧完成后，即得到致密的Li4Ti5O12烧结体。本发明使用的闪烧是通过电‑热转换效应对胚体整体加热，电流产生的热量几乎全部用于胚体烧结，具备超快速致密化、抑制晶粒生长，能耗低，抑制Li的挥发等特点。
Rapid sintering preparation method of Li4Ti5O12 ceramic target material
The invention provides a rapid sintering preparation method of a Li4Ti5O12 ceramic target material, and belongs to the technical field of preparation of ceramic target materials. The preparation method comprises the following steps of: 1) compression molding: putting Li4Ti5O12 powder into a hard alloy mold, carrying out compression molding, and performing demolding to obtain a flash burning precursor mold-pressed biscuit; (2) cold isostatic pressing molding: carrying out cold isostatic pressing treatment on the flash burning precursor mold-pressed biscuit to obtain a final biscuit; and (3) rapid sintering: heating the final biscuit in a protective atmosphere, keeping the temperature constant under the condition that the temperature reaches a flash burning temperature, applying direct current to the two ends of the biscuit, starting flash burning under the condition that the voltage required by flash burning is obtained, then controlling flash burning for a period of time with a constant current value, and obtaining a compact Li4Ti5O12 sintered body after completing the flash burning. According to the method, the flash burning is used for integrally heating the blank body through anelectro-thermal conversion effect, and almost all heat generated by current is used for sintering the blank body. The method has the advantages of ultra-fast densification, inhibition of grain growth, low energy consumption, inhibition of Li volatilization and the like.
本发明提供一种Li4Ti5O12陶瓷靶材的快速烧结制备方法，属于陶瓷靶材的制备技术领域。包括：1)模压成型：将Li4Ti5O12粉末装入硬质合金模具中，进行模压成型，脱膜后得到闪烧前驱体模压素坯；2)冷等静压成型：将闪烧前驱体模压素坯经过冷等静压处理后，得到最终素坯；3)快速烧结：将最终素坯在保护性气氛下加热升温，当达到闪烧温度时恒温保持，并在素坯两端施加直流电，当达到闪烧所需电压时开始发生闪烧，随后以恒定的电流值控制闪烧持续一段时间，闪烧完成后，即得到致密的Li4Ti5O12烧结体。本发明使用的闪烧是通过电‑热转换效应对胚体整体加热，电流产生的热量几乎全部用于胚体烧结，具备超快速致密化、抑制晶粒生长，能耗低，抑制Li的挥发等特点。
Rapid sintering preparation method of Li4Ti5O12 ceramic target material
一种Li4Ti5O12陶瓷靶材的快速烧结制备方法
XU CHEN (Autor:in) / LIU FANGMING (Autor:in) / BAI BIN (Autor:in)
09.02.2021
Patent
Elektronische Ressource
Chinesisch
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