Ion diffusion and microwave electromagnetic characteristics of LiZn/NiCuZn ferrites

Here Li
_0.35
Zn
_0.30
Fe
_2.21
O
₄₅
and Ni
_0.52
Zn
_0.40
Cu
_0.10
Fe
_1.98
O
₄
ferrite have been fabricated by conventional ceramic process, respectively, and LiZn and NiCuZn powders were mixed together with 0.1wt% Bi
₂
O
₃
and NiCuZn mass percent from Owt% to 100wt% to prepare LiZn/NiCuZn ferrites with sintering temperature T
_s
from 800 to 1200°C. The ion diffusion and microwave electromagnetic characteristics of LiZn/NiCuZn ferrites have been investigated in detail. Fig. 1 shows Ni element atomic percent contents for the LiZn/NiCuZn ferrites with different NiCuZn ferrites contents from 20 to 80wt% for the sintering temperature from 800 to 1200°C. Considering a certain composition of LiZn/NiCuZn ferrite, dozens of grains in random region have been chosen to measure the Ni element atomic percent contents by means of EDS. The Ni element randomly distributes in different grains at the low sintering temperature, especially, when the sintering temperature is 800°C. The detected minimum and maximum of Ni element atomic percent contents keep on a rise with the increase of NiCuZn contents in LiZn/NiCuZn ferrites at T
_s
=800°C. However, the Ni element atomic percent contents show a convergence trend with the increase of sintering temperature and tends to be a stable state beyond T
_s
=1020°C, meanwhile, the stable state Ni element atomic percent contents at T
_s
=1200°C increases from 4.3 to 14.3 corresponding to the increase of NiCuZn ferrites contents from 20 to 80wt% in LiZn/NiCuZn ferrites.