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LiZnTi ferrite material for LTCC phase shifter and preparation method of material

The technology of ferrite material and phase shifter is applied in the field of preparation of gyromagnetic ferrite material and glass ceramics, which can solve the problem of high sintering temperature of LiZnTi ferrite and achieve the effect of excellent gyromagnetic performance.

Inactive Publication Date: 2014-09-10
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, as the main application material of the phase shifter, the sintering temperature of LiZnTi ferrite prepared by the traditional method is higher than the highest temperature (961°C) of co-firing with silver electrodes in LTCC technology.

Method used

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  • LiZnTi ferrite material for LTCC phase shifter and preparation method of material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] (1) First put Li 2 CO 3 , ZnO, TiO 2 and Fe 2 o 3 According to the molecular formula Li 0.43 Zn 0.27 Ti 0.13 Fe 2.17 o 4 Formulated into the main powder;

[0017] (2) Mix the main powder prepared in step (1) evenly, add deionized water to the main powder according to the weight ratio of the main powder and deionized water as 1:1.5, and mix for 4 to 5 hours by wet grinding method , take it out and dry it at 100-120°C, and sieve it with an 80-mesh sieve. The main powder after sieving is raised from room temperature to 780-800°C at a heating rate of 2°C / min and kept for about 2 hours;

[0018] (3) Sintering aid LBSCA glass with 52.45mol% Li 2 O, 31.06 mol% B 2 o 3 , 11.99 mol% SiO 2 , 2mol% CaO and 2.5mol% Al 2 o 3 The ingredients are ball milled for 12 hours by wet milling method, taken out and dried at 100-120°C, sieved with an 80-mesh sieve, and the sieved powder is put into a crucible at a rate of 2°C / min from room temperature to Keep warm at 1150°C for...

Embodiment 2

[0022] (1) First put Li 2 CO 3 , ZnO, TiO 2 and Fe 2 o 3 According to the molecular formula Li 0.43 Zn 0.27 Ti 0.13 Fe 2.17 o 4 Formulated into the main powder;

[0023] (2) Mix the main powder prepared in step (1) evenly, add deionized water to the main powder according to the weight ratio of the main powder and deionized water as 1:1.5, and mix for 4 to 5 hours by wet grinding method , take it out and dry it at 100-120°C, and sieve it with an 80-mesh sieve. The main powder after sieving is raised from room temperature to 780-800°C at a heating rate of 2°C / min and kept for about 2 hours;

[0024] (3) Sintering aid LBSCA glass with 52.45mol% Li 2 O, 31.06 mol% B 2 o 3 , 11.99 mol% SiO 2 , 2mol% CaO and 2.5mol% Al 2 o 3The ingredients are ball milled for 12 hours by wet milling method, taken out and dried at 100-120°C, sieved with an 80-mesh sieve, and the sieved powder is put into a crucible at a rate of 2°C / min from room temperature to Keep warm at 1150°C for ...

Embodiment 3

[0028] (1) First put Li 2 CO 3 , ZnO, TiO 2 and Fe 2 o 3 According to the molecular formula Li 0.43 Zn 0.27 Ti 0.13 Fe 2.17 o 4 Formulated into the main powder;

[0029] (2) Mix the main powder prepared in step (1) evenly, add deionized water to the main powder according to the weight ratio of the main powder and deionized water as 1:1.5, and mix for 4 to 5 hours by wet grinding method , take it out and dry it at 100-120°C, and sieve it with an 80-mesh sieve. The main powder after sieving is raised from room temperature to 780-800°C at a heating rate of 2°C / min and kept for about 2 hours;

[0030] (3) Sintering aid LBSCA glass with 52.45mol% Li 2 O, 31.06 mol% B 2 o 3 , 11.99 mol% SiO 2 , 2mol% CaO and 2.5mol% Al 2 o 3 The ingredients are ball milled for 12 hours by wet milling method, taken out and dried at 100-120°C, sieved with an 80-mesh sieve, and the sieved powder is put into a crucible at a rate of 2°C / min from room temperature to Keep warm at 1150°C for...

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Abstract

The invention aims at solving the technical problem of providing a LiZnTi ferrite material which is low in coercivity, low in ferromagnetic resonance linewidth and high in saturation magnetization intensity property under the circumstance of satisfying sintering at a low temperature below 950 DEG C; the LiZnTi ferrite material is used for an LTCC (Low Temperature Co-fired Ceramic) phase shifter. The ferrite material is composed of a main material and a glass phase sintering aid, wherein the percentage by weight of the main material is 99.3-99.85%, while the percentage by weight of the glass phase sintering aid is 0.15-0.7%; the main material is prepared from raw materials Li2CO3, ZnO, TiO2 and Fe2O3 according to a molecular formula Li0.43Zn0.27Ti0.13Fe2.17O4; the glass phase sintering aid is prepared by mixing 52.45mol% of Li2O, 31.06mol% of B2O3, 11.99mol% of SiO2, 2mol% of CaO and 2.5mol% of Al2O3 together, performing ball milling on the mixture for 12 hours, heating to 1150 DEG C and preserving heat for 1 hour, reducing to 1000 DEG C and carrying out quick quenching. The preparation method of the ferrite material has the advantages that the sintering temperature of the LiZnTi ferrite is successfully reduced to about 900 DEG C and the excellent gyromagnetism of the LiZnTi ferrite material is kept, and therefore, the material can be co-fired with a silver electrode and widely applied to manufacturing the LTCC phase shifters.

Description

technical field [0001] The invention relates to the technical field of preparation of gyromagnetic ferrite materials and glass ceramics applied by LTCC technology, in particular to a gyromagnetic ferrite material with low coercive force, low ferromagnetic resonance line width and high saturation magnetic induction at the same time of low-temperature sintering and its preparation method. Background technique [0002] As a key component, phase shifters are widely used in phased array antenna systems and phase modulation communication systems. In recent years, electronic information technology continues to develop towards high frequency and digitalization. It is more and more urgent to realize the miniaturization, integration and modularization of components including phase shifters. The use of LTCC (low temperature co-fired ceramics) technology to realize the miniaturization of phase shifter has attracted more and more researchers' interest. Among them, the co-firing tempera...

Claims

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Application Information

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IPC IPC(8): C04B35/26C04B35/622
Inventor 张怀武周廷川廖宇龙贾利军
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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