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The invention provides a preparation method of an NTC (Negative Temperature Coefficient) thermal sensitive ceramic material, which comprises the following steps: (a) carrying out first grinding treatment on raw materials MnO2, Fe2O3 and Ni2O3 to obtain first grinding powder, and carrying out first calcination on the first grinding powder to obtain a compound FeNiMnO4; (b) carrying out second grinding treatment on the raw materials MnO2, Cr2O3 and Ni2O3 to obtain second grinding powder, and carrying out second calcination on the second grinding powder to obtain a compound CrNiyMn2.0-yO4, wherein y is more than or equal to 0.1 and less than or equal to 0.9; (c) the FeNiMnO4 and the CrNiyMn2.0-yO4 are mixed according to the molar ratio of x: (2-x) and subjected to third grinding treatment to obtain third grinding powder, the third grinding powder is subjected to granulation treatment to obtain ceramic powder, and x is larger than or equal to 0.5 and smaller than or equal to 0.9; (d) pressing the ceramic powder to obtain a ceramic green body; and (e) sintering the ceramic body to obtain the NTC thermal sensitive ceramic material. The method is suitable for large-scale production, the thermosensitive constant B value range of the obtained thermosensitive ceramic material is 5200-7700 K, and the resistivity at 25 DEG C is 1.2-8.3 * 10 < 7 > omega.cm.
本申请提供一种NTC热敏陶瓷材料的制备方法，包括以下步骤：(a)将原料MnO2、Fe2O3和Ni2O3进行第一研磨处理得到第一研磨粉体，将第一研磨粉体进行第一煅烧后得到化合物FeNiMnO4；(b)将原料MnO2、Cr2O3和Ni2O3进行第二研磨处理得到第二研磨粉体，将第二研磨粉体进行第二煅烧后得到化合物CrNiyMn2.0‑yO4，其中0.1≤y≤0.9；(c)将上述FeNiMnO4和CrNiyMn2.0‑yO4按x:(2‑x)的摩尔比混合并进行第三研磨处理得到第三研磨粉体，将第三研磨粉体进行造粒处理后得到陶瓷粉体，其中0.5≤x≤0.9；(d)将所述陶瓷粉体进行压制，得到陶瓷坯体；以及(e)将所述陶瓷坯体进行烧结，得到所述NTC热敏陶瓷材料。该方法适宜大规模生产，所获得的热敏陶瓷材料的热敏常数B值范围为5200～7700K，25℃的电阻率为1.2～8.3×107Ω·cm。
The invention provides a preparation method of an NTC (Negative Temperature Coefficient) thermal sensitive ceramic material, which comprises the following steps: (a) carrying out first grinding treatment on raw materials MnO2, Fe2O3 and Ni2O3 to obtain first grinding powder, and carrying out first calcination on the first grinding powder to obtain a compound FeNiMnO4; (b) carrying out second grinding treatment on the raw materials MnO2, Cr2O3 and Ni2O3 to obtain second grinding powder, and carrying out second calcination on the second grinding powder to obtain a compound CrNiyMn2.0-yO4, wherein y is more than or equal to 0.1 and less than or equal to 0.9; (c) the FeNiMnO4 and the CrNiyMn2.0-yO4 are mixed according to the molar ratio of x: (2-x) and subjected to third grinding treatment to obtain third grinding powder, the third grinding powder is subjected to granulation treatment to obtain ceramic powder, and x is larger than or equal to 0.5 and smaller than or equal to 0.9; (d) pressing the ceramic powder to obtain a ceramic green body; and (e) sintering the ceramic body to obtain the NTC thermal sensitive ceramic material. The method is suitable for large-scale production, the thermosensitive constant B value range of the obtained thermosensitive ceramic material is 5200-7700 K, and the resistivity at 25 DEG C is 1.2-8.3 * 10 < 7 > omega.cm.
本申请提供一种NTC热敏陶瓷材料的制备方法，包括以下步骤：(a)将原料MnO2、Fe2O3和Ni2O3进行第一研磨处理得到第一研磨粉体，将第一研磨粉体进行第一煅烧后得到化合物FeNiMnO4；(b)将原料MnO2、Cr2O3和Ni2O3进行第二研磨处理得到第二研磨粉体，将第二研磨粉体进行第二煅烧后得到化合物CrNiyMn2.0‑yO4，其中0.1≤y≤0.9；(c)将上述FeNiMnO4和CrNiyMn2.0‑yO4按x:(2‑x)的摩尔比混合并进行第三研磨处理得到第三研磨粉体，将第三研磨粉体进行造粒处理后得到陶瓷粉体，其中0.5≤x≤0.9；(d)将所述陶瓷粉体进行压制，得到陶瓷坯体；以及(e)将所述陶瓷坯体进行烧结，得到所述NTC热敏陶瓷材料。该方法适宜大规模生产，所获得的热敏陶瓷材料的热敏常数B值范围为5200～7700K，25℃的电阻率为1.2～8.3×107Ω·cm。
NTC thermal sensitive ceramic material and preparation method thereof
NTC热敏陶瓷材料及其制备方法
2024-06-07
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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