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High-capacitance-temperature-coefficient barium titanate dielectric material for extremely-high-voltage-resistant MLCC, preparation method and application
The invention provides a high-capacitance-temperature-coefficient barium titanate dielectric material for an extremely-high-voltage-resistant MLCC, and belongs to the technical field of dielectric materials for MLCCs. The high-capacitance-temperature-coefficient barium titanate dielectric material comprises a main body material BaTiO3 and a doping material, the doping material comprises SiO2 and oxides, salts or compounds in other forms of Mg, Al, Zn, Mn, Zr, Dy and Y; the addition amount of the main body material BaTiO3 is 91-99 mol%, and the addition amount of the doping material is 1-9 mol%. The invention further provides a preparation method and application of the high-capacitance-temperature-coefficient barium titanate dielectric material for the extremely high-voltage-resistant MLCC. By regulating and controlling the adding amount of the main body material BaTiO3 and the doping materials, the main body material BaTiO3 and the doping materials are applied to be prepared into the MLCC device, the dielectric constant of the MLCC can range from 1700 to 2600, and the room-temperature resistivity can reach 150 G omega.m; the high voltage resistance is extremely high, the average breakdown field strength is as high as 80kV/mm, and the highest average breakdown voltage is as high as 500V; the capacitance-temperature coefficient is high, the capacitance change rate ranges from-22% to + 22% when the temperature ranges from-55 DEG C to 125 DEG C, and the X7S temperature characteristic requirement can be met.
本发明提供一种极耐高压MLCC用高容温系数钛酸钡介电材料，属于MLCC用介电材料技术领域，包括主体材料BaTiO3和掺杂材料；所述掺杂材料包括SiO2，及Mg、Al、Zn、Mn、Zr、Dy、Y的氧化物、盐或其他形式的化合物；所述主体材料BaTiO3的添加量为91～99mol％，所述掺杂材料的添加量为1～9mol％。本发明还提供了上述极耐高压MLCC用高容温系数钛酸钡介电材料的制备方法和应用。本发明通过调控主体材料BaTiO3和各掺杂材料的添加量，将其应用于制备成MLCC器件，可使MLCC的介电常数介于1700‑2600之间，室温电阻率可达到150GΩ·m；极耐高压，平均耐击穿场强高达80kV/mm，最高平均耐击穿电压高达500V；容温系数高，温度为‑55℃～125℃时，电容变化率在‑22％到+22％之间，能够满足X7S温度特性要求。
High-capacitance-temperature-coefficient barium titanate dielectric material for extremely-high-voltage-resistant MLCC, preparation method and application
The invention provides a high-capacitance-temperature-coefficient barium titanate dielectric material for an extremely-high-voltage-resistant MLCC, and belongs to the technical field of dielectric materials for MLCCs. The high-capacitance-temperature-coefficient barium titanate dielectric material comprises a main body material BaTiO3 and a doping material, the doping material comprises SiO2 and oxides, salts or compounds in other forms of Mg, Al, Zn, Mn, Zr, Dy and Y; the addition amount of the main body material BaTiO3 is 91-99 mol%, and the addition amount of the doping material is 1-9 mol%. The invention further provides a preparation method and application of the high-capacitance-temperature-coefficient barium titanate dielectric material for the extremely high-voltage-resistant MLCC. By regulating and controlling the adding amount of the main body material BaTiO3 and the doping materials, the main body material BaTiO3 and the doping materials are applied to be prepared into the MLCC device, the dielectric constant of the MLCC can range from 1700 to 2600, and the room-temperature resistivity can reach 150 G omega.m; the high voltage resistance is extremely high, the average breakdown field strength is as high as 80kV/mm, and the highest average breakdown voltage is as high as 500V; the capacitance-temperature coefficient is high, the capacitance change rate ranges from-22% to + 22% when the temperature ranges from-55 DEG C to 125 DEG C, and the X7S temperature characteristic requirement can be met.
本发明提供一种极耐高压MLCC用高容温系数钛酸钡介电材料，属于MLCC用介电材料技术领域，包括主体材料BaTiO3和掺杂材料；所述掺杂材料包括SiO2，及Mg、Al、Zn、Mn、Zr、Dy、Y的氧化物、盐或其他形式的化合物；所述主体材料BaTiO3的添加量为91～99mol％，所述掺杂材料的添加量为1～9mol％。本发明还提供了上述极耐高压MLCC用高容温系数钛酸钡介电材料的制备方法和应用。本发明通过调控主体材料BaTiO3和各掺杂材料的添加量，将其应用于制备成MLCC器件，可使MLCC的介电常数介于1700‑2600之间，室温电阻率可达到150GΩ·m；极耐高压，平均耐击穿场强高达80kV/mm，最高平均耐击穿电压高达500V；容温系数高，温度为‑55℃～125℃时，电容变化率在‑22％到+22％之间，能够满足X7S温度特性要求。
High-capacitance-temperature-coefficient barium titanate dielectric material for extremely-high-voltage-resistant MLCC, preparation method and application
极耐高压MLCC用高容温系数钛酸钡介电材料、制备方法和应用
WANG PENGFEI (Autor:in) / ZHANG LEI (Autor:in) / ZHENG LIU (Autor:in) / YU SHUHUI (Autor:in) / SUN RONG (Autor:in)
21.11.2023
Patent
Elektronische Ressource
Chinesisch
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