A kind of ceramic material and preparation method thereof
A technology of ceramic materials and single-phase ceramics, applied in the field of multifunctional materials, can solve problems such as large leakage currents, and achieve the effects of outstanding ferromagnetic properties, good ferroelectricity and ferromagnetism, and low phase formation temperature
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[0032] This application also provides the formula Bi 11 Ti 6 Fe 2.8 co 0.2 o 33 The preparation method of the shown ceramic material comprises the following steps: dissolving the titanium source, the bismuth source, the iron source and the cobalt source in the acid solution and the complexing agent according to the stoichiometric ratio of 30:55:14:1 to obtain a mixed solution ;
[0033] Evaporate the mixed solution to dryness, burn it, and then pre-fire it to obtain a ceramic powder;
[0034] The ceramic powder is pressed into shape and then sintered to obtain a ceramic material.
[0035] The preparation method of the ceramic material described in this application is carried out according to the process of mixing-pre-sintering-sintering.
[0036] According to the present invention, firstly, the raw materials for preparing ceramic materials are mixed, that is, the titanium source, the bismuth source, the iron source and the cobalt source are dissolved in the acid solution...
Embodiment 1
[0045] (1) According to the purity and weighing amount of each raw material in Table 1, take by weighing 9.4719g tetra-n-butyl titanate, 24.4985g bismuth nitrate pentahydrate, 5.2201g iron nitrate nonahydrate, 0.2686g cobalt nitrate hexahydrate and dissolve in an appropriate amount In nitric acid, by magnetic stirring, a clear solution of uniform metal ion mixing is formed; then add complexing agent 18.6906g ethylenediaminetetraacetic acid (EDTA) and 19.1091g monohydrate citric acid (the molar ratio of EDTA, citric acid and metal ion is 0.7:1:1), in the process of stirring at a uniform speed, dropwise add ammonia water to adjust the pH value of the solution to make it neutral, and after stirring for half an hour, a clear and transparent solution is obtained;
[0046] (2) Pour the solution configured above into a crucible, heat it on a heating plate at about 300°C, the solution is gradually evaporated to dryness, and then burns to release a large amount of carbon dioxide, nitrog...
Embodiment 2
[0056] (1) According to the purity and weighing amount of each raw material listed in Table 2, weigh 10.5109g tetra-n-butyl titanate, 27.1857g bismuth nitrate pentahydrate, 5.7927g ferric nitrate nonahydrate, 0.2539g cobalt acetate tetrahydrate soluble In an appropriate amount of nitric acid, stir by magnetic force to form a clear solution mixed with uniform metal ions; then add complexing agent 20.7408g ethylenediaminetetraacetic acid (EDTA) and 21.2052g citric acid monohydrate (EDTA, citric acid and metal ion moles Ratio is 0.7:1:1), in the process of constant speed stirring, dropwise add ammonia water to adjust the pH value of the solution, making it neutral, after stirring for half an hour, a clear and transparent solution is obtained;
[0057] Table 2 Bi 11 Ti 6 Fe 2.8 co 0.2 o 33 Raw material data sheets for ceramic materials
[0058] Drug Name chemical formula molecular weight Drug purity Weighing mass / g Tetra-n-butyl titanate C 16 h 36 ...
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