Correction to: Bull Natl Res Cent

https://doi.org/10.1186/s42269-019-0204-9

After publication of the original article (Hamzawy et al. 2019), we were notified that

  1. 1.

    In Table 3, the caption ‘n.d. not deleted’ should be replaced with ‘n.d. not detected’;

  2. 2.

    In Table 5, repeated photos should not be there.

Below the correct version of Table 5:

Table 5 Some properties of W0, WSG1, WSG2 and WSG3 samples sintered at 900 °C/2 h

The original article has been corrected.