As can be seen, kL composite sample is significantly lower than the BTS, with the increase of (b) BT content, kL is reduced, but when the content is greater than 0.5, but has increased kL.
It can be seen that the KL of the composite sample is significantly lower than that of BTS. With the increase of BT content (b), the KL decreases, but when the content is greater than 0.5, the KL increases.<br>