<trans-title xml:lang="en">Low-temperature Sintering of LiBxAl1-xSi2O6 Microwave Dielectric Ceramics with Ultra-low Permittivity </trans-title>

x	Lattice parameter				$R_{p}$ /%	$R_{wp}$ /%	χ²
x	a/nm	b/nm	c/nm	V/nm³	$R_{p}$ /%	$R_{wp}$ /%	χ²
0	0.75380(5)	0.75380(5)	0.91556(4)	0.52024(4)	7.69	10.8	1.84
0.05	0.75346(3)	0.75346(3)	0.91533(1)	0.51963(9)	7.32	10.1	1.83
0.08	0.75320(5)	0.75320(5)	0.91494(0)	0.51906(2)	7.24	10.2	1.89
0.12	0.75286(8)	0.75286(8)	0.91434(9)	0.51826(2)	7.24	10.2	1.87
0.16	0.75246(2)	0.75246(2)	0.91332(8)	0.51712(5)	7.29	10.1	1.86
0.20	0.75206(4)	0.75206(4)	0.91257(9)	0.51615(5)	7.22	9.98	1.87

Table 2. V_m, α, ε_theo, ε_r, and α/V_m of LiB_xAl_1-_xSi₂O₆ ceramics

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Table 2. V_m, α, ε_theo, ε_r, and α/V_m of LiB_xAl_1-_xSi₂O₆ ceramics

x	V_m / nm³	α / nm³	ε_theo	ε_r	α·V_m^-1
0	0.1300610	0.0157900	4.1042	3.95	0.121405
0.05	0.1299098	0.0157530	4.0968	3.90	0.121261
0.08	0.1297655	0.0157308	4.0949	3.85	0.121225
0.12	0.1295655	0.0157012	4.0928	3.81	0.121184
0.16	0.1292813	0.0156716	4.0947	3.76	0.121221
0.20	0.1290388	0.0156420	4.0946	3.69	0.121219

Table 3. Bond valence, covalence and average covalence of LiB_xAl_1-_xSi₂O₆ ceramics

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Table 3. Bond valence, covalence and average covalence of LiB_xAl_1-_xSi₂O₆ ceramics

x	V_Li	V_Si/Al	V_O	C_Li-O/%	C_Si/Al-O/%	Average/%
0	0.820	3.906	1.912	18.87	53.18	36.03
0.05	0.821	3.935	1.924	18.89	53.44	36.16
0.08	0.823	3.947	1.930	18.92	53.54	36.23
0.12	0.824	3.978	1.943	18.94	53.81	36.37
0.16	0.825	4.036	1.968	18.95	54.31	36.63
0.20	0.829	4.075	1.986	19.02	54.65	36.83

Table 4. Sintering temperatures (ST) and microwave dielectric properties of several silicates compared with LiB_xAl_1-_xSi₂O₆^{[17,19,26,28,38,41 -45]}

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Table 4. Sintering temperatures (ST) and microwave dielectric properties of several silicates compared with LiB_xAl_1-_xSi₂O₆^{[17,19,26,28,38,41 -45]}

Component	ST/℃	ε_r	Q×f/GHz	τ_f/(×10^-6, ℃^-1)	Ref.
LiAlSiO₄	1350	4.9	36000	-57.3	[17]
Li(Al_0.99Li_0.01)SiO_3.99	1250	3.49	51358	-51.48	[17]
Ca₂SiO₄	1450	8.6	26100	-89	[19]
Sr₂SiO₄	1575	9.5	19100	-205	[19]
Ba₂SiO₄	1525	13.1	17900	-17	[19]
Zn₂SiO₄	1340	5.7	53000	-16	[41]
Ba₂ZnSi₂O₇	1200	8.09	26600	-51.4	[42]
Sr₂MgSi₂O₇	1280	6.85	22530	-32	[43]
Sr₃MgSi₂O₈	1450	11.6	25375	-57.41	[44]
Li₂SiO₃	1025	6.19	30550	-40.95	[38]
Li₂ZnSiO₄	1250	5.8	14700	-96.6	[45]
Li₂MgSiO₄	1100	5.73	13570	-16.7	[26]
LiB_xAl_1-_xSiO₄(0.02≤x≤0.1)	875-1100	3.34-3.73	25770-27540	-22.85--16.5	[28]
LiB_xAl_1-_xSi₂O₆(0≤x≤0.20)	1000-1400	3.69-3.95	24300-30500	-45.9--20.9	This work

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Siyu XIONG, Chen MO, Xiaowei ZHU, Guobin ZHU, Deqin CHEN, Laijun LIU, Xiaodong SHI, Chunchun LI. Low-temperature Sintering of LiB_xAl_1-_xSi₂O₆ Microwave Dielectric Ceramics with Ultra-low Permittivity [J]. Journal of Inorganic Materials, 2025, 40(5): 536

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Paper Information

Category:

Received: Nov. 27, 2024

Accepted: --

Published Online: Sep. 2, 2025

The Author Email: Chunchun LI (lichunchun2003@126.com)

DOI:10.15541/jim20240494

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Rietveld refined structural parameters of LiBxAl1-xSi2O6 ceramics

Table 1. Rietveld refined structural parameters of LiBxAl1-xSi2O6 ceramics

Table 2. Vm, α, εtheo, εr, and α/Vm of LiBxAl1-xSi2O6 ceramics

Table 2. Vm, α, εtheo, εr, and α/Vm of LiBxAl1-xSi2O6 ceramics

Table 3. Bond valence, covalence and average covalence of LiBxAl1-xSi2O6 ceramics

Table 3. Bond valence, covalence and average covalence of LiBxAl1-xSi2O6 ceramics

Table 4. Sintering temperatures (ST) and microwave dielectric properties of several silicates compared with LiBxAl1-xSi2O6[17,19,26,28,38,41 -45]

Table 4. Sintering temperatures (ST) and microwave dielectric properties of several silicates compared with LiBxAl1-xSi2O6[17,19,26,28,38,41 -45]

Table 1. Rietveld refined structural parameters of LiB_xAl_1-_xSi₂O₆ ceramics

Table 1. Rietveld refined structural parameters of LiB_xAl_1-_xSi₂O₆ ceramics

Table 2. V_m, α, ε_theo, ε_r, and α/V_m of LiB_xAl_1-_xSi₂O₆ ceramics

Table 2. V_m, α, ε_theo, ε_r, and α/V_m of LiB_xAl_1-_xSi₂O₆ ceramics

Table 3. Bond valence, covalence and average covalence of LiB_xAl_1-_xSi₂O₆ ceramics

Table 3. Bond valence, covalence and average covalence of LiB_xAl_1-_xSi₂O₆ ceramics

Table 4. Sintering temperatures (ST) and microwave dielectric properties of several silicates compared with LiB_xAl_1-_xSi₂O₆^{[17,19,26,28,38,41 -45]}

Table 4. Sintering temperatures (ST) and microwave dielectric properties of several silicates compared with LiB_xAl_1-_xSi₂O₆^{[17,19,26,28,38,41 -45]}