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A kind of ba-co-v base low medium and low heat microwave ceramic material and preparation method thereof
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A technology of microwave ceramics and microwave dielectric ceramics, applied in ceramics, inorganic insulators, etc., can solve the problems of silver infiltration, inability to LTCC devices, and unusable casting process.
Active Publication Date: 2022-03-15
YANCHUANG PHOTOELECTRIC TECH GANZHOU
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Ryosuke Umemura et al by adding burning aid B 2 o 3 , will Ba 3 (VO 4 ) 2 The sintering temperature is reduced to 925°C, τf is 27.4-66.1ppm / °C, but the Q*f value is reduced to 41,065GHz, and due to the introduction of sintering aid B 2 o 3 As a result, the post-casting process is unavailable, and silver seepage occurs when making device circuit patterns (the main reason is a large amount of B 2 o 3 The interaction between the sintering aid and the glass in the Ag paste) makes it impossible to really apply to the manufacture of LTCC devices
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Embodiment 1
[0027] (1) Use the following raw material components and their content to configure the material Ba 2.95 co 0.05 (VO 4 ) 2 :
[0028] Table 1: Formula table of embodiment 1 (unit: mol)
[0029] BaCO 3
[0030] (2) Calculate and weigh the raw materials according to the formula ratio in Table 1, and mix the raw materials by ball milling, drying, crushing and sieving, pre-sintering, granulation, molding, and sintering to obtain materials with excellent microwave dielectric properties and positive τf. The pre-firing temperature is 800°C, the molding pressure is 10MPa, the holding time is 30s, the sintering temperature is 950°C, the heating rate and cooling rate are 2°C / min, the heat preservation time is 64h, and the temperature is lowered to 700°C and then cooled naturally.
Embodiment 2
[0032] (1) Use the following raw material components and their content to configure the material Ba 2.9 co 0.1 (VO 4 ) 2 :
[0033] Table 2: Formula table of embodiment 2 (unit: mol)
[0034] BaCO 3
[0035] (2) Calculate and weigh the raw materials according to the formula ratio in Table 2. The raw materials are mixed by ball milling, drying, crushing and sieving, pre-sintering, granulation, molding, and sintering. The materials have excellent microwave dielectric properties and positive τf. The pre-firing temperature is 800°C, the molding pressure is 10MPa, the holding time is 30s, the sintering temperature is 950°C, the heating rate and cooling rate are 2°C / min, the heat preservation time is 64h, and the temperature is lowered to 700°C and then cooled naturally.
Embodiment 3
[0037] (1) Use the following raw material components and their content to configure the material Ba 2.85 co 0.15 (VO 4 ) 2 :
[0038] Table 3: Formula table of embodiment 3 (unit: mol)
[0039] BaCO 3
[0040] (2) Calculate and weigh the raw materials according to the formula ratio in Table 3, and mix the raw materials by ball milling, drying, crushing and sieving, pre-sintering, granulation, molding, and sintering to obtain materials with excellent microwave dielectric properties and positive τf. The pre-firing temperature is 800°C, the molding pressure is 10MPa, the holding time is 30s, the sintering temperature is 950°C, the heating rate and cooling rate are 2°C / min, the heat preservation time is 64h, and the temperature is lowered to 700°C and then cooled naturally.
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Abstract
The invention belongs to the technical field of electronic materials, and specifically relates to a Ba-Co-V-based low-intermediate and low-fire microwave ceramic material and a preparation method thereof, which has a low sintering temperature, high Q*f value and positive τf value, and can be applied to LTCC technology field. The present invention works on Ba with high microwave dielectric properties 3 (VO 4 ) 2 On the basis of ceramics, without adding a fever reducer, by adjusting the ratio of raw materials, Co 2+ Replace Ba 3 (VO 4 ) 2 Ba in 2+ , through different amounts of substitution, low-density sintering at 900°C to 950°C, obtained Ba‑Co‑V based low-k dielectrics with τf of +14.5ppm / °C to +23.8ppm / °C and Q*f of 25318GHz to 54,063GHz Microwave dielectric ceramic material; since no sintering aid B is added 2 o 3 , thus avoiding the influence of the application in the late LTCC field on the casting process, and can be effectively used in the field of LTCC technology as a microwave dielectric ceramic τf adjustment material.
Description
technical field [0001] The invention belongs to the technical field of electronic materials, and in particular relates to a Ba-Co-V-based low-medium-low-fire microwave ceramic material and a preparation method thereof, which has a low sintering temperature, high Q*f value and positive τf value, and can be applied to LTCC technology field. Background technique [0002] The rapid development of electronic communication, especially involving the increasing importance of microwave frequency band communication (300MHz ~ 300GHz), is widely used in mobile handsets, bluetooth, radar, radio and television and other fields. Therefore, with the development of microwave devices, the demand for microwave components such as resonators, filters, and dielectric antennas is also increasing. Microwave dielectric ceramics have a controllable size, and the integrated circuits composed of resonators and microstrip lines made of them can make the device size reach the order of millimeters, makin...
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