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A pure black alumina ceramic material
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A ceramic material, alumina technology, applied in the field of electronic ceramics, can solve the problems of high cost, inconsistent inside and outside, high cobalt price, etc., and achieve the effect of good size consistency, good wear resistance and good toughness
Active Publication Date: 2015-08-19
XINHUA COUNTY XINTIAN ELECTRONICS CERAMICS
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In addition, a large amount of cobalt dioxide is also added on this basis, so that the price of cobalt is quite expensive, and the cost is greatly increased. Although the color is better than the original, it is blue-black, and the inside and outside are still inconsistent.
There are also some companies that directly purchase the black color base and add α-alumina to make products after grinding and mixing. The blackness of the product has improved, but it is not pure black, and the inside and outside are still inconsistent.
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Embodiment 1
[0028] This embodiment provides a pure black alumina ceramic material, which has the following components in weight percentage:
[0029] α-alumina 77.5~95.0wt%,
[0030] Ferric oxide 2.5~7.5wt%,
[0031] Manganese dioxide 2.0~10.0wt%,
[0032] Nickel oxide 0.5~5.0wt%.
[0033] Among them, the chemical molecular formula of α-alumina is α-Al 2 o 3 , mainly using 95-Al 2 o 3 ; The chemical molecular formula of ferric oxide is Fe 2 o 3 ; The chemical formula of manganese dioxide is MnO 2 ; The chemical formula of nickel oxide is NiO 2 .
[0034] The ceramic material is processed by the following method, and the specific steps are as follows:
[0035] S1, first weigh a predetermined amount of ferric oxide, manganese dioxide and nickel oxide powder, mix the three powders evenly to form the first mixed powder, and put the first mixed powder at 1150°C to 1350°C Calcination at ℃ for 3 to 5 hours;
[0036] S2, naturally cooling the first mixed powder calcined in step S1 to ...
Embodiment 2
[0039] This embodiment provides a pure black alumina ceramic material, which has the following components in weight percentage:
[0040] α-alumina 86.5~92.5wt%,
[0041] Ferric oxide 3.5~5.5wt%,
[0042] Manganese dioxide 3.0~5.0wt%,
[0043] Nickel oxide 1.0~3.0wt%.
Embodiment 3
[0045] This embodiment provides a pure black alumina ceramic material, which has the following components in weight percentage:
[0046] α-alumina 92.5wt%,
[0047] Ferric oxide 3.5wt%,
[0048] Manganese dioxide 3.0wt%,
[0049] Nickel oxide 1.0wt%.
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Abstract
The invention discloses an aluminum oxide pure black ceramic material. The aluminum oxide pure black ceramic material comprises the following components in percentage by weight: 77.5 to 95.0 percent of alpha-aluminum oxide, 2.5 to 7.5 percent of ferric oxide, 2.0 to 10.0 percent of manganese dioxide and 0.5 to 5.0 percent of nickel oxide. The invention also discloses a formula and a processing method of the aluminum oxide pure black ceramic material. The ferric oxide, the manganese dioxide, the nickel oxide and the alpha-aluminum oxide are mixed according to the design ratio, so that the internal and external consistency of the ceramic material is greatly improved and the ceramic material is pure black. The sintered product has low shrinkage ratio and good consistency.
Description
technical field [0001] The invention relates to the technical field of electronic ceramics, in particular to a pure black alumina ceramic material. Background technique [0002] Ceramics that can use electricity and magnetic properties in the electronics industry are called electronic ceramics. Electronic ceramics are ceramics with new functions obtained through the control of surface, grain boundary and size structure. It can be widely used in energy, household appliances, automobiles, etc. [0003] At present, black electronic ceramic materials are usually mixed and finely ground by iron, manganese, chromium + α-alumina ball mills, then made into wax cakes, and then made into products. The appearance of its products is: coffee black, while the inside is iron red and black. In addition, a large amount of cobalt dioxide is also added on this basis, so that the price of cobalt is quite expensive, and the cost is greatly increased. Although the color is better than the orig...
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