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A platform for research: civil engineering, architecture and urbanism
Zinc oxide resistor disc, preparation method thereof and method for regulating and controlling potential gradient and through-current capability of zinc oxide resistor disc
The invention relates to the technical field of electric power materials, and particularly discloses a zirconium-containing bismuth-rich high-potential-gradient large-through-flow zinc oxide resistor disc. The raw material formula of the zinc oxide resistor disc is improved, the proportion of ZrO2, Bi2O3 and the melting agent is changed, and regulation and control of the potential gradient and the through-flow density of the zinc oxide varistor are achieved. Sanding and centrifugal granulation processes are further adopted to promote the morphology uniformity of the zinc oxide resistor raw material powder, a double-sided crimping process is adopted to realize green compact densification, and a low-temperature sintering process is provided to promote the uniform growth of crystal grains and reduce the porosity at the same time. According to the invention, the potential gradient of the zinc oxide resistor disc can be adjusted within +/-200V/mm on the basis of an original formula, the 2ms square wave through-current density can be adjusted within +/-20A/cm <2>, and the problems that the potential gradient/through-current capability is insufficient and the electrical properties such as the potential gradient/through-current capability and the like cannot be regulated and controlled in the prior art are solved.
本发明涉及电力材料技术领域，具体公开了一种含锆多铋的高电位梯度大通流氧化锌电阻片。本发明通过对氧化锌电阻片的原料配方进行改良，改变了ZrO2、Bi2O3以及熔融剂的占比，实现了对氧化锌压敏电阻电位梯度与通流密度的调控。进一步采用砂磨与离心造粒工艺促进氧化锌电阻原料粉体形貌均匀，采用双面压接工艺实现生坯致密化，提出低温烧结工艺，促进晶粒均匀生长的同时降低孔隙率。本发明可使氧化锌电阻片的电位梯度在原配方基础上实现±200V/mm可调，2ms方波通流密度在±20A/cm2之间可调，解决了现有技术中电位梯度/通流能力不足，电位梯度/通流能力等电气性能无法调控的难题。
Zinc oxide resistor disc, preparation method thereof and method for regulating and controlling potential gradient and through-current capability of zinc oxide resistor disc
The invention relates to the technical field of electric power materials, and particularly discloses a zirconium-containing bismuth-rich high-potential-gradient large-through-flow zinc oxide resistor disc. The raw material formula of the zinc oxide resistor disc is improved, the proportion of ZrO2, Bi2O3 and the melting agent is changed, and regulation and control of the potential gradient and the through-flow density of the zinc oxide varistor are achieved. Sanding and centrifugal granulation processes are further adopted to promote the morphology uniformity of the zinc oxide resistor raw material powder, a double-sided crimping process is adopted to realize green compact densification, and a low-temperature sintering process is provided to promote the uniform growth of crystal grains and reduce the porosity at the same time. According to the invention, the potential gradient of the zinc oxide resistor disc can be adjusted within +/-200V/mm on the basis of an original formula, the 2ms square wave through-current density can be adjusted within +/-20A/cm <2>, and the problems that the potential gradient/through-current capability is insufficient and the electrical properties such as the potential gradient/through-current capability and the like cannot be regulated and controlled in the prior art are solved.
本发明涉及电力材料技术领域，具体公开了一种含锆多铋的高电位梯度大通流氧化锌电阻片。本发明通过对氧化锌电阻片的原料配方进行改良，改变了ZrO2、Bi2O3以及熔融剂的占比，实现了对氧化锌压敏电阻电位梯度与通流密度的调控。进一步采用砂磨与离心造粒工艺促进氧化锌电阻原料粉体形貌均匀，采用双面压接工艺实现生坯致密化，提出低温烧结工艺，促进晶粒均匀生长的同时降低孔隙率。本发明可使氧化锌电阻片的电位梯度在原配方基础上实现±200V/mm可调，2ms方波通流密度在±20A/cm2之间可调，解决了现有技术中电位梯度/通流能力不足，电位梯度/通流能力等电气性能无法调控的难题。
Zinc oxide resistor disc, preparation method thereof and method for regulating and controlling potential gradient and through-current capability of zinc oxide resistor disc
一种氧化锌电阻片及其制备方法与调控其电位梯度及通流能力的方法
LU JIAZHENG (author) / XIE PENGKANG (author) / LI BO (author) / XU WANG (author) / HU JIANPING (author) / WANG BOWEN (author) / WU WEI (author)
2021-05-14
Patent
Electronic Resource
Chinese
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