Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation method of low-sodium and ultralow-sodium tabular sintered corundum
The invention discloses a preparation method of low-sodium and ultralow-sodium tabular sintered corundum, which adopts industrial alumina powder as a raw material, and is characterized in that the preparation method comprises the following steps: (1) carrying out acid pickling on the industrial alumina powder, and controlling the sodium oxide content of the low-sodium industrial alumina powder obtained by drying through acid pickling and water washing to be lower than 0.1%; (2) sequentially grinding, balling and drying the industrial alumina powder obtained in the step (1), and then calcining at the temperature of 1700-1900 DEG C to obtain low-sodium tabular sintered corundum with the sodium oxide content of less than 0.1%; the preparation method comprises the following steps: (1) preparing low-sodium industrial alumina powder with sodium oxide content of less than 0.1%, (2) preparing low-sodium industrial alumina powder with sodium oxide content of less than 0.05%, (3) performing light burning on the low-sodium industrial alumina powder with sodium oxide content of less than 0.1% obtained in the step (1) at 1000-1300 DEG C, (4) performing acid pickling and water washing treatment on the alumina powder obtained in the step (3), and (5) sequentially grinding the alumina powder obtained in the step (4), and burning at 1700-1900 DEG C for 2.5-3.5 h to obtain the ultralow-sodium tabular sintered corundum with sodium oxide content of less than 0.05%. The prepared low-sodium and ultralow-sodium tabular sintered corundum is good in thermal shock resistance, simple in preparation process, low in cost and suitable for industrial production.
本发明公开了一种低钠及超低钠板状烧结刚玉的制备方法，它包括采用工业氧化铝粉作原料，其特征在于，制备方法包括如下步骤：(1)将工业氧化铝粉进行酸洗，通过酸洗和水洗控制烘干后得到的低钠工业氧化铝粉的氧化钠含量低于0.1％；(2)将步骤(1)中得到的工业氧化铝粉依次研磨、成球、烘干后，然后在温度1700℃～1900℃下煅烧，得到氧化钠含量低于0.1％的低钠板状烧结刚玉；(3)将步骤(1)中得到的氧化钠含量低于0.1％的低钠工业氧化铝粉在1000～1300℃进行轻烧，(4)将步骤(3)中得到的氧化铝粉再进行酸洗和水洗处理，(5)将步骤(4)中的氧化铝粉依次研磨，并在温度1700～1900℃下烧2.5～3.5h，得到氧化钠含量低于0.05％的超低钠板状烧结刚玉。本发明制备的低钠及超低钠板状烧结刚玉，热震稳定性好，且制备过程简单，成本低廉，适用于工业化生产。
Preparation method of low-sodium and ultralow-sodium tabular sintered corundum
The invention discloses a preparation method of low-sodium and ultralow-sodium tabular sintered corundum, which adopts industrial alumina powder as a raw material, and is characterized in that the preparation method comprises the following steps: (1) carrying out acid pickling on the industrial alumina powder, and controlling the sodium oxide content of the low-sodium industrial alumina powder obtained by drying through acid pickling and water washing to be lower than 0.1%; (2) sequentially grinding, balling and drying the industrial alumina powder obtained in the step (1), and then calcining at the temperature of 1700-1900 DEG C to obtain low-sodium tabular sintered corundum with the sodium oxide content of less than 0.1%; the preparation method comprises the following steps: (1) preparing low-sodium industrial alumina powder with sodium oxide content of less than 0.1%, (2) preparing low-sodium industrial alumina powder with sodium oxide content of less than 0.05%, (3) performing light burning on the low-sodium industrial alumina powder with sodium oxide content of less than 0.1% obtained in the step (1) at 1000-1300 DEG C, (4) performing acid pickling and water washing treatment on the alumina powder obtained in the step (3), and (5) sequentially grinding the alumina powder obtained in the step (4), and burning at 1700-1900 DEG C for 2.5-3.5 h to obtain the ultralow-sodium tabular sintered corundum with sodium oxide content of less than 0.05%. The prepared low-sodium and ultralow-sodium tabular sintered corundum is good in thermal shock resistance, simple in preparation process, low in cost and suitable for industrial production.
本发明公开了一种低钠及超低钠板状烧结刚玉的制备方法，它包括采用工业氧化铝粉作原料，其特征在于，制备方法包括如下步骤：(1)将工业氧化铝粉进行酸洗，通过酸洗和水洗控制烘干后得到的低钠工业氧化铝粉的氧化钠含量低于0.1％；(2)将步骤(1)中得到的工业氧化铝粉依次研磨、成球、烘干后，然后在温度1700℃～1900℃下煅烧，得到氧化钠含量低于0.1％的低钠板状烧结刚玉；(3)将步骤(1)中得到的氧化钠含量低于0.1％的低钠工业氧化铝粉在1000～1300℃进行轻烧，(4)将步骤(3)中得到的氧化铝粉再进行酸洗和水洗处理，(5)将步骤(4)中的氧化铝粉依次研磨，并在温度1700～1900℃下烧2.5～3.5h，得到氧化钠含量低于0.05％的超低钠板状烧结刚玉。本发明制备的低钠及超低钠板状烧结刚玉，热震稳定性好，且制备过程简单，成本低廉，适用于工业化生产。
Preparation method of low-sodium and ultralow-sodium tabular sintered corundum
一种低钠及超低钠板状烧结刚玉的制备方法
LI YUANYUAN (Autor:in) / ZHAO YI (Autor:in) / MA ZHENG (Autor:in) / CHEN YAOSHENG (Autor:in) / XUE JUNZHU (Autor:in) / WU XIAOYING (Autor:in)
20.09.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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