A novel ntc thermistor material based on nickel oxide
A thermistor and raw material technology, which is applied to resistors with negative temperature coefficients, resistors, non-adjustable metal resistors, etc., can solve the problems of structural relaxation, low volatilization temperature, volatilization of raw material components, etc. Simple, low sintering temperature and rich raw material effect
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Embodiment 1
[0020] This embodiment according to the molecular formula Ni 1-x-y Y x Mg y O is dosed, where x=0.01, y=0.01. The initial raw material is selected from basic nickel carbonate NiCO 3 2Ni(OH) 2 4H 2 O, Yttrium trioxide Y 2 o 3 , Magnesium oxide MgO. Materials were prepared according to the following experimental process steps:
[0021] (1) The initial raw material is Ni 0.98 Y 0.01 Mg 0.01 O formula ingredients, weigh NiCO 3 2Ni(OH) 2 4H 2 O30.7205g, Y 2 o 3 0.2823g, MgO 0.1007g;
[0022] (2) The raw materials taken in the previous step are dissolved in dilute nitric acid respectively;
[0023] (3) Mix the two solutions prepared in the previous step together, and use a magnetic stirring heater to stir and mix evenly, heat and dry;
[0024] (4) Calcining the powder obtained in the previous step at a temperature of 900° C. and keeping it warm for 2 hours;
[0025] (5) The powder synthesized in the previous step is granulated and pressed into a green body; the g...
Embodiment 2
[0031] This embodiment according to the molecular formula Ni 1-x-y Y x Mg y O was dosed, where x=0.02, y=0.01. The initial raw material is selected from basic nickel carbonate NiCO 3 2Ni(OH) 2 4H 2 O, Yttrium trioxide Y 2 o 3 , Magnesium oxide MgO. Materials were prepared according to the following experimental process steps:
[0032] (1) The initial raw material is Ni 0.97 Y 0.02 Mg 0.01 O formula ingredients, weigh NiCO 3 2Ni(OH) 2 4H 2 O30.4070g, Y 2 o 3 0.5646g, MgO 0.1007g;
[0033] (2) The preparation process is the same as steps (2)-(8) in Example 1.
[0034] The properties of the prepared materials are shown in Table 1. figure 1 and figure 2 shown.
Embodiment 3
[0036] This embodiment according to the molecular formula Ni 1-x-y Y x Mg y O was dosed where x=0.03, y=0.003. The initial raw material is selected from basic nickel carbonate NiCO 3 2Ni(OH) 2 4H 2 O, Yttrium trioxide Y 2 o 3 , Magnesium oxide MgO. Materials were prepared according to the following experimental process steps:
[0037] (1) The initial raw material is Ni 0.967 Y 0.03 Mg 0.003 O formula ingredients, weigh NiCO 3 2Ni(OH) 2 4H 2 O30.3130g, Y 2 o 3 0.8468g, MgO 0.0302g;
[0038] (2) The preparation process is the same as steps (2)-(8) in Example 1.
[0039] The properties of the prepared materials are shown in Table 1. figure 1 and figure 2 shown.
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