Method for preparing microwave dielectric ceramic material
A technology of microwave dielectric ceramics and grinding media, which is applied in the field of ceramic materials, can solve the problems of large particle size of ceramic powder, many impurity phases, and it is not easy for dielectric ceramics to be sintered and completely densified. Guaranteed high densification effect
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[0013] Example one
[0014] A high-performance microwave dielectric ceramic material preparation method, the flow chart is as follows figure 1 Shown, including:
[0015] In step S1, the powders of calcium carbonate, alumina, neodymium oxide and titanium dioxide are mechanically mixed with grinding media and organic solvents.
[0016] In the embodiment of the present invention, the raw neodymium oxide powder is first calcined at 800 degrees Celsius for 3 hours, and then calcium carbonate, aluminum oxide, neodymium oxide, and titanium dioxide are weighed according to the required molar percentage formula, and then zirconium dioxide grinding balls are used as Grinding medium, anhydrous ethanol or deionized water as the organic solvent, the mass ratio of the grinding ball, mixed powder, and solvent is 3:1:3, the overall volume of the spherical tank is 40%-60%, and the raw material mixing time is 8~ 12 hours. Wherein, the molar percentage of alumina and neodymium oxide is 0.14% to 0.24%...
Example Embodiment
[0032] Example two
[0033] A preparation method of microwave dielectric ceramic material includes:
[0034] Step one, pre-burn the raw neodymium oxide powder at 800 degrees Celsius for 3 hours before mixing to remove moisture; according to the chemical formula 0.72CaTiO 3 -0.28NdAlO 3 Mechanically mix calcium carbonate, alumina, pre-fired neodymium oxide, and titanium dioxide powder; use zirconium dioxide grinding balls as the grinding medium, absolute ethanol or deionized water as the organic solvent, and the mass ratio of the grinding balls, mixed powder, and solvent is 3:1:3, its overall volume occupies 40%-60% of the spherical tank, and the raw material mixing time is 12 hours.
[0035] In the embodiment of the present invention, the stoichiometric ratios of calcium carbonate and titanium dioxide are both 0.72 mol%, and the stoichiometric ratios of alumina and neodymium oxide are both 0.28 mol%. Among them, the purity of calcium carbonate and alumina powder in the raw materials...
Example Embodiment
[0043] Example three
[0044] A preparation method of microwave dielectric ceramic material includes:
[0045] Step 1. Pre-burn the neodymium oxide powder at 800 degrees Celsius for 3 hours before mixing to remove moisture; according to the chemical formula 0.62CaTiO 3 -0.38NdAlO 3 Mechanically mix calcium carbonate, alumina, pre-fired neodymium oxide, and titanium dioxide powder; use zirconium dioxide grinding balls as the grinding medium, absolute ethanol or deionized water as the organic solvent, and the mass ratio of the grinding balls, mixed powder, and solvent is 3:1:3, its overall volume occupies 40%-60% of the spherical tank, and the raw material mixing time is 10 hours.
[0046] In the embodiment of the present invention, the stoichiometric ratio of calcium carbonate and titanium dioxide is both 0.62 mol%, and the stoichiometric ratio of alumina and neodymium oxide is both 0.38 mol%. Among them, the purity of calcium carbonate and alumina powder in the raw materials is grea...
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