Preparation method of high-dielectric-constant BaO-TiO2-Nd2O3 capacitor ceramic material
A bao-tio2-nd2o3, high dielectric constant technology, applied in the direction of fixed capacitor dielectric, fixed capacitance components, etc., can solve the problems of low dielectric constant, large temperature coefficient of capacitance, etc., to improve the dielectric constant, The effect of reducing the temperature coefficient of capacitance and lowering the sintering temperature
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Embodiment 1
[0020] This embodiment provides a high dielectric constant BaO-TiO 2 -Nd 2 o 3 The preparation method of capacitor ceramic material comprises the following steps:
[0021] (1) Take BaO, TiO 2 、Nd 2 o 3 and modifying agent, mixed for 10 hours by wet ball milling, the ball milling medium is distilled water, and dried after ball milling; the BaO, Nd 2 o 3 and TiO 2 The molar ratio of the modifier is 1:1:5.35, and the addition amount of the modifier is BaO, Nd 2 o 3 、TiO 2 6% of the mass sum of the three;
[0022] (2) The mixed powder after the drying of the ball mill is uniformly mixed with PVA and then pressed into shape, the weight ratio of the mixed powder to the binder is 100:25, and the pressure of the pressed shape is 95MPa;
[0023] (3) After pressing and forming, pre-fire in the atmosphere, the pre-sintering temperature is 700 ° C, and the temperature is kept for 4 hours;
[0024] (4) The calcined product is then poured in the atmosphere, the sintering tempera...
Embodiment 2
[0029] This embodiment provides a high dielectric constant BaO-TiO 2 -Nd 2 o 3 The preparation method of capacitor ceramic material comprises the following steps:
[0030] (1) Take BaO, TiO 2 、Nd 2 o 3 and modifier, mixed for 12 hours by wet ball milling, the ball milling medium was distilled water, and dried after ball milling; the BaO, Nd 2 o 3 and TiO 2 The molar ratio of the modifier is 1:1:5.25, and the addition amount of the modifier is BaO, Nd 2 o 3 、TiO 2 10% of the mass sum of the three;
[0031] (2) The mixed powder after the drying of the ball mill is uniformly mixed with PVA and then pressed into shape, the weight ratio of the mixed powder to the binder is 100:15, and the pressure of the pressed shape is 100MPa;
[0032] (3) After pressing and forming, pre-fire in the atmosphere, the pre-sintering temperature is 600 ° C, and the temperature is kept for 5 hours;
[0033] (4) The calcined product is then poured in the atmosphere, the sintering temperature...
Embodiment 3
[0038] This embodiment provides a high dielectric constant BaO-TiO 2 -Nd 2 o 3 The preparation method of capacitor ceramic material comprises the following steps:
[0039] (1) Take BaO, TiO 2 、Nd 2 o 3 and modifying agent, mixed for 15 hours by wet ball milling, the ball milling medium is distilled water, and dried after ball milling; the BaO, Nd 2 o 3 and TiO 2 The molar ratio of the modifier is 1:1:5.40, and the addition amount of the modifier is BaO, Nd 2 o 3 、TiO 2 3% of the mass sum of the three;
[0040] (2) The mixed powder after ball mill drying is uniformly mixed with paraffin and then pressed into shape, the weight ratio of the mixed powder to the binder is 100:30), and the pressure of the shape is 90MPa;
[0041] (3) After pressing and forming, pre-fire in the atmosphere, the pre-sintering temperature is 800 ° C, and the temperature is kept for 3 hours;
[0042] (4) Cast the pre-fired product in the atmosphere, the sintering temperature is 1180 ° C, keep...
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