Ba-Zn-Nb microwave ceramic medium and its preparing process
A microwave dielectric ceramic, barium zinc niobium technology, applied in ceramics, inorganic insulators, etc., can solve the problems of damage to material properties, low performance of LTCC components, and poor quality.
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[0017] Example 1
[0018] The chemical composition of this embodiment is: Ba(Zn 1 / 3 Nb 2 / 3 )O 3 -0.005CoO, using 99% purity barium nitrate, zinc nitrate, niobium oxalate, and cobalt nitrate as starting materials, and achieve through the following steps:
[0019] 1) With 99% pure barium nitrate Ba(NO 3 ) 2 , Zinc nitrate Zn (NO 3 ) 2 .6H 2 O, Niobium Oxalate H 3 NbO(C 2 O 4 ) 3 ·4H 2 O, cobalt nitrate Co(NO 3 ) 2 .6H 2 O and citric acid (C 6 H 8 ) 7 .H 2 O is the starting material. Dissolve barium nitrate, zinc nitrate, niobium oxalate and citric acid in a certain amount of deionized water in a certain proportion to form a solution. The total molar ratio of the amount of citric acid added to the metal ion is 1.5:1. Then add cobalt nitrate in a certain proportion and dissolve it;
[0020] 2) Slowly add ammonia water to the solution prepared in step 1 until the pH value reaches between 5-8, add it at 80°C and continue stirring to form a transparent sol;
[0021] 3) Dry the sol prepar...
Example Embodiment
[0025] Example 2
[0026] The chemical composition of this embodiment is: Ba(Zn 1 / 3 Nb 2 / 3 )O 3 -0.005CoO-O0.005CuO, with 99% purity barium nitrate, zinc nitrate, niobium oxalate, cobalt nitrate and copper nitrate as starting materials, and achieved through the following steps:
[0027] 1) With 99% pure barium nitrate Ba(NO 3 ) 2 , Zinc nitrate Zn (NO 3 ) 2 .6H 2 O, Niobium Oxalate H 3 NbO(C 2 O 4 ) 3 ·4H 2 O, cobalt nitrate Co(NO 3 ) 2 .6H 2 O, copper nitrate Cu (NO 3 ) 2 .6H 2 O and citric acid (C 6 H 8 ) 7 .H 2 O is the starting material. Dissolve barium nitrate, zinc nitrate, niobium oxalate and citric acid in a certain amount of deionized water in a certain proportion to form a solution. The total molar ratio of the amount of citric acid added to the metal ion is 1.5:1. Then add cobalt nitrate and copper nitrate in a certain proportion to dissolve;
[0028] 2) Slowly add ammonia water to the solution prepared in step 1 until the pH value reaches between 5-8, add it at 80°C an...
Example Embodiment
[0033] Example 3
[0034] The chemical composition of this embodiment is: Ba(Zn 1 / 3 Nb 2 / 3 )O 3 -0.005CoO-O0.005CuO-0.01B 2 O 3 , Using 99% pure barium nitrate, zinc nitrate, niobium oxalate, cobalt nitrate, copper nitrate and boric acid as starting materials, and achieve through the following steps:
[0035] 1) With 99% pure barium nitrate Ba(NO 3 ) 2 , Zinc nitrate Zn (NO 3 ) 2 .6H 2 O, Niobium Oxalate H 3 NbO(C 2 O 4 ) 3 ·4H 2 O, cobalt nitrate Co(NO 3 ) 2 .6H 2 O, copper nitrate Cu (NO 3 ) 2 .6H 2 O, boric acid B 2 O 3 .3H 2 O and citric acid (C 6 H 8 ) 7 .H 2 O is the starting material. Dissolve barium nitrate, zinc nitrate, niobium oxalate and citric acid in a certain amount of deionized water in a certain proportion to form a solution. The total molar ratio of the amount of citric acid added to the metal ion is 1.5:1. Then add cobalt nitrate, copper nitrate and boric acid in a certain proportion to dissolve;
[0036] 2) Slowly add ammonia water to the solution prepared in ste...
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