Temperature-stabilized pyrochlore complex-phase dielectric ceramics and preparation method thereof

[0034] Example 1

[0035] The general formula of the stoichiometric ratio of the temperature-stabilized pyrochlore multiphase dielectric ceramic of this embodiment is: 0.8 (Bi 1.5 Zn 0.5 )(Zr 1.5 Nb 0.5 )O 7 +0.2(Bi 1.5 Zn 0.5 )(Zn 0.5 Nb 1.5 )O 7 .

[0036] The preparation method of the temperature-stabilized pyrochlore multiphase dielectric ceramic of the present embodiment is:

[0037] Step 1. Adopt Bi with a mass purity of 99% 2 O 3 Powder, ZnO powder with mass purity of 99.8%, Nb with mass purity of 99.5% 2 O 5 Powder and ZrO with a mass purity of 99% 2 Powder is the raw material, according to the chemical formula (Bi 1.5 Zn 0.5 )(Zr 1.5 Nb 0.5 )O 7 and (Bi 1.5 Zn 0.5 )(Zn 0.5 Nb 1.5 )O 7 ingredients separately;

[0038] Step 2, mix the raw materials after batching in step 1 and place them in a planetary ball mill for ball milling for 5h to obtain slurry;

[0039] Step 3. After drying the slurry described in step 2, heat it to 820 ° C for pre-synthe

[0045] Example 2

[0046] The general formula of the stoichiometric ratio of the temperature-stabilized pyrochlore multiphase dielectric ceramic of this embodiment is: 0.7 (Bi 1.5 Zn 0.5 )(Zr 1.5 Nb 0.5 )O 7 +0.3(Bi 1.5 Zn 0.5 )(Zn 0.5 Nb 1.5 )O 7 .

[0047] The preparation method of the temperature-stabilized pyrochlore multiphase dielectric ceramic of the present embodiment is:

[0048] Step 1. Adopt Bi with a mass purity of 99% 2 O 3 Powder, ZnO powder with mass purity of 99.8%, Nb with mass purity of 99.5% 2 O 5 Powder and ZrO with a mass purity of 99% 2 Powder is the raw material, according to the chemical formula (Bi 1.5 Zn 0.5 )(Zr 1.5 Nb 0.5 )O 7 and (Bi 1.5 Zn 0.5 )(Zn 0.5 Nb 1.5 )O 7 ingredients separately;

[0049] Step 2, mixing the raw materials batched in step 1 and then placing them in a planetary ball mill for ball milling for 4 hours to obtain slurry;

[0050] Step 3, drying the slurry described in step 2 and heating to 810 ° C for pre-s

[0056] Example 3

[0057] The general formula of the stoichiometric ratio of the temperature-stabilized pyrochlore multiphase dielectric ceramic of this embodiment is: 0.65 (Bi 1.5 Zn 0.5 )(Zr 1.5 Nb 0.5 )O 7 +0.35(Bi 1.5 Zn 0.5 )(Zn 0.5 Nb 1.5 )O 7 .

[0058] The preparation method of the temperature-stabilized pyrochlore multiphase dielectric ceramic of the present embodiment is:

[0059] Step 1. Adopt Bi with a mass purity of 99% 2 O 3 Powder, ZnO powder with mass purity of 99.8%, Nb with mass purity of 99.5% 2 O 5 Powder and ZrO with a mass purity of 99% 2 Powder is the raw material, according to the chemical formula (Bi 1.5 Zn 0.5 )(Zr 1.5 Nb 0.5 )O 7 and (Bi 1.5 Zn 0.5 )(Zn 0.5 Nb 1.5 )O 7 ingredients separately;

[0060] Step 2, mix the raw materials after batching in step 1 and place them in a planetary ball mill for ball milling for 6h to obtain slurry;

[0061] Step 3, drying the slurry described in step 2 and heating it to 800 ° C for pre-synt