TRANSPARENT ALUMINA-BASED PLATE AND METHOD OF MAKING THEREOF

    公开(公告)号:US20210362369A1

    公开(公告)日:2021-11-25

    申请号:US17121840

    申请日:2020-12-15

    IPC分类号: B28B3/02 C01F7/02

    摘要: The present disclosure provides a transparent alumina-based plate, and a hot-pressing method to make the transparent alumina-based plate from platelet alumina. Alumina powder with a platelet morphology was hot-pressed to transparency with pre-load pressures of about 0-8 MPa, maximum temperatures of about 1750-1825° C., maximum pressures of about 2.5-80 MPa, and isothermal hold times of 1-7 hours. A novel alumina-based plate has been prepared, wherein the plate has a thickness of 2-5 mm, an in-line transmission of at least 60-75% for a light with a wavelength range of 645-2500 nm, an in-line transmission variance of