Low-temperature sintered microwave dielectric ceramic material with middle permittivity
A low-temperature sintering technology for microwave dielectric ceramics, which is applied in the field of ceramic compositions, can solve problems such as high sintering temperature and narrow sintering range, and achieve the effects of simplifying the preparation process and saving time and energy costs
Inactive Publication Date: 2015-10-21
TIANJIN UNIV
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ZnZrNb 2 o 8 As a new type of microwave dielectric material, ceramics have excellent microwave dielectric properties in the millimeter wave band: moderate dielectric constant (30), high quality factor (61,000GHz), but the sintering temperature is as high as 1280 ° C, and the sintering range narrow
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[0019] The present invention uses ZnO (analytical pure), NiO (analytical pure), ZrO 2 (analytical pure), Nb 2 o 5 (analytical pure), BaCO 3 (analytical pure), CuO (analytical pure), H 3 BO 3 (analytical pure) as the initial raw material, microwave dielectric ceramics (Zn 0.9 Ni 0.1 )ZrNb 2 o 8 +2wt%BaCu(B 2 o 5 ); the specific implementation steps are as follows:
[0020] 1. Combine ZnO, NiO, ZrO 2 , Nb 2 o 5 According to the stoichiometric formula (Zn 0.9 Ni 0.1 )ZrNb 2 o 8 For batching, referred to as powder A, the proportion of powder A is: 3.1183g ZnO, 0.3180g NiO, 5.2462g ZrO 2 , 11.3172g Nb 2 o 5 ;
[0021] BaCO 3 , CuO, H 3 BO 3 According to the stoichiometric formula BaCu(B 2 o 5 ) for batching, referred to as powder B, the proportion of powder B is: 9.8534g BaCO 3 , 3.9718g CuO, 6.1746g H 3 BO 3 ;
[0022] Put powder A and powder B into two polyester tanks respectively, add 200ml of deionized water to each, add 150g of zirconium balls, and...
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Abstract
The invention discloses a low-temperature sintered microwave dielectric ceramic material with a middle dielectric constant. The material has a chemical formula of (Zn0.9Ni0.1)ZrNb2O8+2wt%BaCu(B2O5). The material is prepared by comprising the following steps: compounding ZnO, NiO, ZrO2 and Nb2O5 according to the chemical formula of (ZnO0.9Ni0.1)ZrNb2O8 so as to obtain a powder A for short, and compounding BaCO3, CuO and H3BO3 according to the chemical formula of BaCu(B2O5) so as to obtain a powder B for short; respectively carrying out ball milling, drying and sieving, and presintering the powder A at 1000 to 1150 DEG C and the powder B at 700 to 850 DEG C; then mixing the powder A and the powder B according to the chemical formula of (Zn0.9Ni0.1)ZrNb2O8+2wt%BaCu(B2O5), carrying out ball milling, drying and sieving, then carrying out compression molding into a green body, and sintering the green body at 800 to 950 DEG C so as to prepare the microwave dielectric ceramic with the middle dielectric constant. According to the invention, dielectric constant epsilon r is 26.53 to 29.45; quality factor Q to f is 25430 to 43448 GHz; temperature coefficient tau f of resonant frequency is <45.45> to <32.87> to 10<6> / DEG C; meanwhile, preparation process is simplified, and time and energy cost are saved.
Description
technical field [0001] The present invention belongs to a kind of ceramic composition characterized by composition, especially relates to a kind of (Zn 0.9 Ni 0.1 )ZrNb 2 o 8 +2wt%BaCu(B 2 o 5 ) is a microwave dielectric ceramic material with a chemical formula of low sintering temperature and medium dielectric constant and a preparation method thereof. Background technique [0002] With the rapid development of wireless communication technology in the 21st century, electronic technology is gradually moving towards miniaturization, integration, surface assembly, multi-dimensionality and high frequency. Low Temperature Co-fired Ceramics (LTCC) technology is a key way to promote this development trend. LTCC technology mainly includes the following three aspects: materials, design, and process and equipment. Among them, the material is the basis for producing LTCC devices. For microwave dielectric materials, the main requirements of LTCC technology are as follows: lower...
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IPC IPC(8): C04B35/495C04B35/622
Inventor 李玲霞孙浩吕笑松李赛
Owner TIANJIN UNIV