<trans-title xml:lang="en">Usage of the P-V-L Bond Theory in Regulating Properties of Microwave Dielectric Ceramics</trans-title>

2. Polar coordinates (E_g, φ) correspond to the covalent and ionic energies expressed in Cartesian coordinates (E_h, C), and the polar angle φ indicating the ionic phase angle (drawn with reference to Ref. [15])

3. Schematic diagrams of common silicate system^[5]

4. Schematic diagram of CZ₁₋_x(AN)_xM (x = 0.02-0.10) crystal structure^[53]

5. Schematic diagram of ZnWO₄crystal structure^[62]

6. DOS of Zn, W and O atoms^[63]

7. Schematic diagram of ErVO₄ crystal structure^[68]

8. Total DOS and PDOS of MgTa₂O₆ structure^[81]

9. Schematic diagrams of common titanate architectures^[91-94]

Table 1. Crystal structures and microwave dielectric properties of silicate ceramics

Table 1. Crystal structures and microwave dielectric properties of silicate ceramics

Formula	ε_r	Q×f/GHz	τ_f/(×10⁻⁶, ℃⁻¹)	ST^*/℃	Ref.
CaMgSi2O6	7.46	59638	-46	1290	[27]
CaCoSi2O6	6.04	12457	-18.91	1175	[26]
CaMgSi1.95Ti0.05O6	7.94	80774	-58.56	1275	[36]
Sr2MgSi2O7	8.3	55000	-47.5	1550	[4]
Sr2MnSi2O7	8.8	32000	-58.5	1375
Ca2ZnSi2O7	11.0	13500	-64.3	1300
Mg2SiO4	6.8	270000	-70	1500	[30]
(Mg0.2Ni0.2Zn0.2Co0.2Mn0.2)2SiO4	8.02	28431	-38.2	1250	[31]
SrCu0.95B0.05(B2+: Cu, Co, Mn, Ni, Mg, Zn)Si4O10	5.8	65589	-50	1050	[35]

Table 2. Crystal structures and microwave dielectric properties of phosphate ceramics

Table 2. Crystal structures and microwave dielectric properties of phosphate ceramics

Formula	ε_r	Q×f/GHz	τ_f/(×10⁻⁶, ℃⁻¹)	ST/℃	Ref.
LiNiPO4	11.49	10792	-2.8	900	[40]
LiLnPO4(Ln=La, Sm, Eu)	5.04-5.26	41607-75968	-19.64--47.49	910-925	[41]
KSrPO4	7.85	34527	-14.82	950	[44]
Ni3(PO4)2	6.23	83430	-24.63	1200	[43]
BaZnP2O7	8.21	84760	-21.9	900	[45]

Table 3. Crystal structures and microwave dielectric properties of niobate ceramics

Table 3. Crystal structures and microwave dielectric properties of niobate ceramics

Formula	ε_r	Q×f/GHz	τ_f/(×10⁻⁶, ℃⁻¹)	ST/℃	Ref.
Li3Mg2NbO6	15.3	109600	-17.3	1100	[70]
MgNb2O6	20.82	121580	-48.89	1460	[72]
ZnCu2Nb2O8	18.56	47776	-16.3	920	[71]
ZnZrNb2O8−Cu	27.9	73200	-40	1175	[73]
Zn0.5Ti0.5NbO4−Co	38.11	39720	-70	1150	[74]
Zn0.5Ti0.5NbO4−Ta	37.86	43642	-72.69	1150	[6]
ZnTiNb2O8	41.52	50827	-2.59	1150	[6]
SmNbO4	16.89-18.01	75200-97800	5.6-2.3	1150	[75]

Table 4. Crystal structures and microwave dielectric properties of tantalate ceramics

Table 4. Crystal structures and microwave dielectric properties of tantalate ceramics

Formula	ε_r	Q×f/GHz	τ_f/(×10⁻⁶, ℃⁻¹)	ST/℃	Ref.
NdTaO4	18	13136	-21	1500	[83]
YbTaO4	18.52	21928	1.25	1675	[79]
MgTa2O6	27.27	109203	53.38	1300	[81]
NiTa2O6	24.58	27610	33.94	1250	[81]
MgTa2O6−Mn	28	105000	19.5	1325	[84]
Mg(1−x)NixTa2O6	27	173000	35	1325	[85]
Ni0.5Ti0.5TaO4	33.06	14600	95	1200−1300	[86]
Co0.5Ti0.5TaO4	40.69	17291	114.54	1075	[87]
ZnZrTa2O8	23.14	140915	-26.42	1375	[88]

Table 5. Crystal structures and microwave dielectric properties of titanate ceramics