Barium phthalate base ceramic capacity medium and preparation process thereof
A technology of ceramic capacitors and barium titanate, which is applied in the direction of fixed capacitor dielectrics, ceramics, components of fixed capacitors, etc., can solve problems such as increased loss, and achieve the effects of low loss, simple preparation process and low sintering temperature
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Embodiment 1
[0012] (1) According to the composition in Table 1, after fully mixing, melting and quenching, grinding, passing through 6000 holes / cm 2 Sampling sieve to obtain glass powder a, b, c,
[0013] (2) Take the pre-burned BaTiO 3 100g, add Nb 2 o 5 0.5g, MgO 8g, Gd 2 o 3 5g, MnCO 3 0.02g, Ag 2 O 0.2g, glass powder a 6g ingredients, its composition code is A, ball milling for 4 hours after mixing the ingredients with deionized water, drying at 120°C, taking out 1 / 2 weight material for secondary ball milling and drying; The technological conditions of the second ball milling and drying are the same as those of the first ball milling and drying.
[0014] Table 1 Composition of glass powder Weight g
[0015] Composition code
[0016] (3) Mix the second ball milling and drying material into the primary ball milling and drying material, add 7g of paraffin, and then pass through 1000 holes / cm 2 Separating sieves for granulation, pressing the granulated powder under pres...
Embodiment 2
[0018] Take pre-burned BaTiO 3 100g, add Nb 2 o 5 2g, MgO 6g, Gd 2 o 3 3g, MnCO 3 0.1g, Ag 2 O 0.75g, glass powder b 4g ingredients, its composition code is B, the raw materials are ball milled for 5 hours, 6g of paraffin wax is added during granulation, and the pressed green disc is dewaxed in an electric furnace for 3 hours to 600°C for 0.5 hours , and then heated to 1125-1135°C for 4 hours for firing, and the other process steps were the same as in Example 1; the upper and lower surfaces of the fired sample were coated with silver paste, and the electrodes were prepared by firing at 840°C, and then various dielectric properties were tested. test.
Embodiment 3
[0020] Take pre-burned BaTiO 3 100g, add Nb 2 o 5 1.25g, MgO 7g, Gd 2 o 3 4g, MnCO 3 0.06g, Ag 2 O 2g, glass powder c 6g batching, its composition code name is C, the raw material ball milling 5 hours of allocating, after drying, take out the material of 1 / 3 weight and carry out secondary ball milling, drying, add 5g paraffin wax during granulation, press into The green wafer is dewaxed in an electric furnace for 4 hours to 500°C for 1 hour, and then heated to 1125-1135°C for 3 hours for firing; other process steps are the same as in Example 1; the upper and lower surfaces of the fired sample are coated with The silver paste was infiltrated at 800°C to prepare electrodes and then tested for various dielectric properties.
[0021] In the firing step of the formulations A, B, and C of the above examples, a group of three pieces of dry-pressed green bodies with different formulations can be taken respectively, and 9 pieces are used as a group, and they are fired simultane...
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Abstract
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