A positive linear capacity temperature change rate medium material and its preparation method

A technology of capacity temperature change rate and dielectric material, which is applied in the field of functional ceramic materials, can solve the problems of large dielectric loss of ceramics, decrease in capacitor capacity, and increase in capacitor temperature, so as to improve insulation resistivity, reduce dielectric loss, and increase density. Effect

Active Publication Date: 2018-05-15
FUJIAN TORCH ELECTRON TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the second type of ceramic capacitors are commonly used in circuit design. Due to the large dielectric loss of the selected ceramics, and the capacitance-temperature curve within the operating temperature range is nonlinear, especially when the capacitance-temperature curve of the selected ceramic capacitor has a negative temperature change. , with the continuous exchange of charges in the circuit, the capacitor itself will generate heat, causing the temperature of the capacitor itself to rise, thereby causing the capacity of the capacitor to decrease
When selecting capacitors normally, the capacitance value at room temperature is generally used as the design basis. If the capacitance value of the capacitor decreases in the high temperature stage, it will inevitably affect the performance of the circuit.

Method used

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  • A positive linear capacity temperature change rate medium material and its preparation method
  • A positive linear capacity temperature change rate medium material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Weigh 52.26g Bi 2 o 3 , 11.89g Na 2 CO 3 and 35.85g TiO 2 , mixed ball milling, sieving, and calcining at 800°C for 4 hours to synthesize sodium bismuth titanate; the sodium bismuth titanate is mainly Bi 0.5 Na 0.5 TiO 3 , containing a small amount of Bi 0.6 Na 0.4 TiO 3 and Bi 0.4 Na 0.6 TiO 3 . The same goes for other embodiments.

[0030] (2) 92.68g barium titanate and 7.32g bismuth sodium titanate were weighed, mixed by ball milling, dried, crushed through a 40-mesh sieve, and calcined at 1200°C for 3 hours to synthesize a eutectic compound;

[0031] (3) Weigh 79.03g Bi 2 o 3 , 20.97g H 3 BO 3 , mixed by ball milling with alcohol as the medium, dried, crushed through a 40-mesh sieve, and calcined at 400°C for 4 hours to synthesize BiBO 3 ;

[0032] (4) Accurately weigh the compound prepared by 97.65g step (2), 1.682g Nb 2 o 5 , 0.426g Nd 2 o 3 , 0.242gMnCO 3 、2g BiBO 3 Proceed to the ingredients. Grind for 6 hours with 2 mm zirconium ba...

Embodiment 2

[0034] (1) Weigh 52.26g Bi 2 o 3 , 11.89g Na 2 CO 3 and 35.85g TiO 2 , mixed ball milling, sieving, and calcining at 900°C for 2 hours to synthesize sodium bismuth titanate;

[0035] (2) Weigh 93.6g of barium titanate and 6.4g of bismuth sodium titanate, mix them by ball milling, dry them, crush them through a 40-mesh sieve, and calcinate at 1140°C for 6 hours to synthesize a eutectic compound;

[0036] (3) Weigh 79.03g Bi 2 o 3 , 20.97g H 3 BO 3 , mixed by ball milling with alcohol as the medium, dried, crushed through a 40-mesh sieve, and calcined at 400°C for 4 hours to synthesize BiBO 3 ;

[0037] (4) Accurately weigh the compound prepared in 97.6g step (2), 1.679g Nb 2 o 5 , 0.483g Er 2 o 3 , 0.242gMnCO 3 , 2.5g BiBO 3 , for batching. Grind for 6 hours with 2mm yttrium stabilized zirconium balls, dry and pass through an 80-mesh standard sieve, add 6-7% paraffin to fry and granulate, and then pass through an 80-mesh standard sieve again. Press the granulated...

Embodiment 3

[0039] (1) Weigh 52.26g Bi 2 o 3 , 11.89g Na 2 CO 3 and 35.85g TiO 2 , mixed ball milling, sieving, and calcining at 850°C for 3 hours to synthesize sodium bismuth titanate;

[0040] (2) Weigh 91.76g of barium titanate and 8.24g of bismuth sodium titanate, mix them by ball milling, dry, crush and pass through a 40-mesh sieve, and calcinate at 1140°C for 2 hours to synthesize a eutectic compound;

[0041] (3) Weigh 79.03g Bi 2 o 3 , 20.97g H 3 BO 3 , mixed by ball milling with alcohol as the medium, dried, crushed through a 40-mesh sieve, and calcined at 400°C for 4 hours to synthesize BiBO 3 ;

[0042] (4) Accurately weigh the compound prepared in 97.48g step (2), 2.016g Nb 2 o 5 , 0.161g Er 2 o 3 , 0.339gMnCO 3 , 2.5g BiBO 3 , for batching. Grind for 6 hours with 2mm yttrium stabilized zirconium balls, dry and pass through an 80-mesh standard sieve, add 6-7% paraffin to fry and granulate, and then pass through an 80-mesh standard sieve again. Press the granul...

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PUM

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Abstract

The invention discloses a medium material with a positive linear capacity temperature change rate and a preparation method thereof. The medium material uses [(1-x)BaTiO3-xBiyNazTiO3] as a base material and adds Nb2O5, RE2O3, MnCO3, and BiBO3; wherein: x= 0.05‑0.15, y=0.4‑0.6, z=0.4‑0.6, the molar ratio of BaTiO3 and BiyNazTiO3 in [(1‑x)BaTiO3‑xBiyNazTiO3] is (1‑x):x; RE is Sm, Er or Ce One or more of them; the dielectric material suitable for positive linear capacity temperature change rate multilayer ceramic capacitor provided by the present invention has low dielectric loss, working temperature range (-55°C-150°C), and good temperature stability ( ‑15%≤ΔC / C≤15%), the temperature change within the working temperature range is a positive linear change, etc. The present invention can be used to design a capacity temperature compensation capacitor within the temperature range (-55°C-150°C), compensate for the negative effect caused by the temperature rise of the capacitor in the functional circuit, and balance the charge capacity of the entire temperature range, thereby improving the stability and reliability of the circuit sex. It has extremely high industrialization prospect and industrial application value.

Description

technical field [0001] The invention relates to the technical field of functional ceramic materials, in particular to a positive linear capacity temperature change rate dielectric material and a preparation method thereof. Background technique [0002] At present, the second type of ceramic capacitors are commonly used in circuit design. Due to the large dielectric loss of the selected ceramics, and the capacity-temperature curve within the operating temperature range is nonlinear, especially when the capacity-temperature curve of the selected ceramic capacitor has a negative temperature change , with the continuous exchange of charges in the circuit, the capacitor itself will generate heat, causing the temperature of the capacitor itself to rise, thereby causing the capacity of the capacitor to decrease. When selecting a capacitor normally, the capacitance value at room temperature is generally used as the design basis. If the capacitance value of the capacitor decreases in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/468C04B35/622
Inventor 陈永虹林志盛宋运雄黄祥贤谢显斌吴金剑许金飘
Owner FUJIAN TORCH ELECTRON TECH CO LTD
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