BaTiO3-based fine-grain ceramic with giant dielectric constant, low loss and high resistivity and preparation method of BaTiO3-based fine-grain ceramic
A technology of giant dielectric constant and high resistivity, applied in the field of BaTiO3-based fine-grained ceramics and its preparation, to achieve the effects of wide source, low price and low raw material price
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[0049] The present invention also provides a BaTiO with giant dielectric constant, low loss and high resistivity 3 The preparation method of base fine-grained ceramics comprises the following steps:
[0050] a) The BaTiO 3 with MAS, Ln 2 O 3 , MnO 2 , MgO is mixed with water and ball-milled and then dried to obtain mixed powder;
[0051] b) Mixing the mixed powder obtained in step a) with a binder, and sequentially undergoing granulation, sieving, molding, debinding and sintering to obtain BaTiO with giant dielectric constant, low loss and high resistivity 3 Base fine-grained ceramic material.
[0052] The present invention firstly combines BaTiO 3 with MAS, Ln 2 O 3 , MnO 2 , MgO and water, mixed with ball-milling, and then dried to obtain mixed powder. In the present invention, the BaTiO 3 with MAS, Ln 2 O 3 , MnO 2 , MgO adopts analytically pure powder raw materials well known to those skilled in the art, which can be obtained from commercially available sourc...
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[0070] Example 1
[0071] A temperature-stable BaTiO with giant dielectric constant, low loss, and high resistivity 3 Base fine-grained ceramic material and preparation method thereof, the specific steps of the preparation method are:
[0072] (1) The BaTiO 3 Powder with 2wt% MAS, 0.4mol% Y 2 O 3 , 0.6mol% MnO 2 , 0.5 mol% MgO powder, mixed with deionized water, ball-milled for 12 hours, and dried to obtain the corresponding mixed ceramic powder.
[0073] (2) adding a PVA binder with a mass ratio of 5% to the ceramic powder obtained in step (1), granulating, sieving, and molding to obtain a ceramic body with a diameter of ~10mm and a thickness of ~1mm; H 2 : N 2 = 0.5%: 99.5% (volume ratio) sintering in an atmosphere, during the sintering process, it must be kept at 600 ° C (heating rate of 3 ° C / min) for 2 hours to debond, and then heated to 1150 ° C for sintering, and kept for 3 hours to obtain BaTiO with Giant Dielectric Constant, Low Loss, High Resistivity and Temp...
Example Embodiment
[0077] Example 2
[0078] A temperature-stable BaTiO with giant permittivity, low loss, and high resistivity 3 Base fine-grained ceramic material, the specific steps of its preparation method are:
[0079] (1) The BaTiO 3 Powder with 2wt% MAS, 0.4mol% Y 2 O 3 , 0.6mol% MnO 2 , 0.5mol% MgO powder, mixed with deionized water, ball-milled for 12 hours, and dried to obtain ceramic powder.
[0080] (2) adding a PVA binder with a mass ratio of 5% to the ceramic powder obtained in step (1), granulating, sieving and molding to obtain a ceramic body with a diameter of ~10mm and a thickness of ~1mm; the ceramic body is in H 2 : N 2 = 0.5%: 99.5% (volume ratio) sintering in the atmosphere, during the sintering process, it must be kept at 600 ° C (heating rate of 3 ° C / min) for 2 hours to remove the glue, and then heated to 1170 ° C for sintering, and kept for 3 hours to obtain a giant. Dielectric Constant, Low Loss and High Resistivity and Temperature Stable BaTiO 3 Base fine-gra...
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