Zinc Oxide Voltage Nonlinear Resistor Shear Orientation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for fabricating voltage nonlinear resistors, such as those using zinc oxide, face challenges in achieving low voltage in high-current regions and require specialized facilities for orientation, particularly for the (110) plane, which can result in inefficient production and higher voltages.
Innovation Solution
A method involving the use of shear force to orient (100) plane of zinc oxide particles, combined with specific minor components like Bi or Pr, to achieve a high degree of (100) plane orientation, thereby lowering resistance and maintaining low voltage in high-current regions, and firing the oriented form at specific temperatures to enhance properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the (110) plane of zinc oxide is oriented to achieve low voltage in high-current region, then voltage VH decreases, but a high magnetic field needs to be applied in a specific direction requiring special facilities
Solution Approach 1:
The patent replaces the magnetic field orientation method with a mechanical shear force method during the molding process. By applying shear force in the extrusion direction, the (100) plane of zinc oxide particles is oriented without requiring high magnetic fields or special facilities, thereby resolving the contradiction between achieving low voltage and avoiding complex equipment
Solution Approach 2:
The patent changes the orientation parameter from (110) plane to (100) plane, and changes the orientation method from magnetic field to shear force. This parameter change allows achieving low voltage in high-current region through a simpler mechanical process rather than complex magnetic field application
2Shape
If acicular zinc oxide particles are oriented by extrusion molding, then the particles are oriented in the c-axis direction, but it is unclear how much the (100) or (110) plane is oriented
Solution Approach 1:
The patent introduces a feedback mechanism by measuring the degree of orientation of the (100) plane using X-ray diffraction and calculating it according to a specific formula. This allows quantitative control and verification of the orientation degree, resolving the uncertainty about the actual orientation achieved by extrusion molding
Solution Approach 2:
The patent applies shear force during the molding process to pre-orient the (100) plane of zinc oxide particles before sintering. This preliminary orientation action ensures that the desired crystal plane orientation is achieved in advance, allowing for precise control and measurement of the orientation degree
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method effectively produces voltage nonlinear resistors with low voltage in high-current regions, simplifying the fabrication process and eliminating the need for high magnetic fields, resulting in improved conductivity and resistance characteristics.
Implementation Method 1
a mixture of (100)-oriented plate-shaped zinc oxide particles and additive materials is formed into a (100)-oriented form by using shear force
Implementation Method 2
the form is fired
Data Source
Figure 1~2
Figure 3
AI summary
The present invention provides a voltage nonlinear resistor containing zinc oxide as a major component, wherein the degree of orientation f(100) of the (100) plane of zinc oxide is 0.40 or more and is represented by the following equation: f(100) = I(100) / (1(100) + I(002) + I(101)), where I(hkl) represents the peak intensity (integral) of a (hkl) plane.