A kind of low loss and low dielectric constant microwave dielectric ceramic material and preparation method thereof
A technology of microwave dielectric ceramics and low dielectric constant, which is applied in the field of ceramic materials and its preparation, can solve the problems of complex preparation methods and the inability of low dielectric microwave dielectric ceramic materials to meet application requirements, and achieve simple operation and low dielectric loss , the effect of low dielectric constant
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Embodiment 1
[0037] In this example, CaCO 3 (industrial pure), SiO 2 (industrial pure), calcium metaborate CaB 2 o 4 (industrial pure), MnO 2 (chemically pure), CuO (chemically pure) as raw materials, the prepared ceramic material components are: CaO-SiO 2 +8wt.%CaB 2 o 4 +0.5wt.%SiO 2 +2wt.%CuO+0.15wt.%MnO 2 .
[0038] The preparation method comprises the following steps:
[0039] (1) CaCO 3 , SiO 2 Put the powder weighed according to the molar ratio of 1:1 into the mixing tank, and add an appropriate amount of deionized water and zirconia balls; seal the tank and put it on the mixer for ball mixing for 12 hours. The rotation speed is 120r / min; after ball milling, the slurry is dried in a drying oven at 120°C and passed through a 100-mesh sieve to obtain a uniformly mixed powder.
[0040] The mixed powder is placed in a high-temperature furnace for pre-calcination at 1000°C for 3 hours, and then cooled with the furnace to obtain a pre-fired block.
[0041] Put the pre-fired b...
Embodiment 2
[0050] This embodiment according to CaO-0.9SiO 2 +10wt.%CaB 2 o 4 +2wt.%SiO 2 +1wt.%CuO+0.15wt.%MnO 2 stoichiometric ingredients.
[0051] The specific preparation process is basically the same as that of Example 1 except that the mass ratio of the ingredients is different. The difference is that in step (3), the cylindrical green body is heated up to 460°C at 4°C / min, and after being kept for 3 hours, the Heating at 5°C / min to 900°C for sintering for 3 hours, and cooling with the furnace to obtain microwave dielectric ceramic products.
[0052] The main properties of the microwave dielectric ceramics prepared in this example are: the main properties of the prepared microwave dielectric ceramics are: a dielectric constant of 5.5 (@10GHz), a dielectric loss of less than 0.00084 (@10GHz), and a flexural strength of 270MPa.
[0053] The microscopic morphology of the microwave dielectric ceramics prepared in this example is shown in figure 2 shown. The internal structure o...
Embodiment 3
[0055] This embodiment according to 0.8CaO-SiO 2 +10wt.%CaB 2 o 4 +2wt.%SiO 2 +1.0wt.%CuO+0.15wt.%MnO 2 stoichiometric ingredients.
[0056] The specific preparation process is basically the same as that of Example 1 except that the mass ratio of the ingredients is different. The difference is that in step (3), the cylindrical green body is heated to 440°C at 2°C / min, and after 4 hours of heat preservation, Raise the temperature at 6°C / min to 875°C and sinter for 5 hours, and then cool down with the furnace to obtain the finished microwave dielectric ceramic.
[0057] The main properties of the microwave dielectric ceramics prepared in this example are: the main properties of the prepared microwave dielectric ceramics are: a dielectric constant of 6.0 (@10GHz), a dielectric loss of less than 0.00083 (@10GHz), and a flexural strength of 300MPa.
[0058] The microscopic morphology of the microwave dielectric ceramics prepared in this example is shown in image 3 shown. Th...
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Abstract
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