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Ancient ceramic resistivity measuring method

A ceramic resistance and measurement method technology, applied in the direction of measuring resistance/reactance/impedance, measuring devices, measuring electrical variables, etc., can solve problems such as unsuitable for ancient ceramics measurement, inability to achieve complete fit, cultural relics pollution damage, etc., to achieve electrode Easy to make, low price, high precision effect

Inactive Publication Date: 2021-11-05
SHAANXI UNIV OF SCI & TECH
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  • Application Information

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Problems solved by technology

Needle electrodes or flat metal electrodes used by other methods cannot achieve complete bonding of the predetermined area
Although the use of conductive glue can also obtain relatively dense contact with the surface of the ancient ceramics to be tested, this kind of electrode will cause pollution and damage to cultural relics and is not suitable for measuring ancient ceramics

Method used

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  • Ancient ceramic resistivity measuring method
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Embodiment Construction

[0027] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0028] The positive and negative poles of the graphite electrode are attached to the upper and lower (or inner and outer) surfaces of the ceramic respectively, and then the electrode is connected to the LCR high-speed bridge measuring instrument to measure the resistivity of the ancient ceramics and obtain ceramics at different frequencies. The volume resistivity of the sheet (see figure 1 ) or surface resistivity (see figure 1 ).

[0029] In addition, graphite electrodes can also be connected to a multimeter to measure the volume resistance of ceramics (see image 3 ) or surface resistance (see Figure 4 ), and then calculate volume resistivity and surface resistivity according to formulas (1) and (2).

[0030] Volume resistivity calculation formula (high resistivity material):

[0031]

[0032] In the formula, Rv is the volume resistance value; r is...

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Abstract

The invention discloses a method for measuring resistivity of ancient ceramic. The method is characterized in that a positive electrode and a negative electrode of a graphite electrode are respectively attached to the upper surface and the lower surface of the ceramic, then the electrodes are connected with an LCR high-speed bridge measuring instrument, the resistivity of the ancient ceramic is measured, and volume resistivity or surface resistivity of a ceramic chip under different frequencies is obtained; or the graphite electrode is connected with a universal meter to measure volume resistance or surface resistance of the ceramic, and then volume resistivity and surface resistivity are calculated according to formulas (1) and (2); a flexible electrode is made of graphite and is tightly attached to a surface of the ceramic so that good electric contact is guaranteed. More importantly, the measuring method does not cause damage to the ancient ceramic and has no requirements on the size and the shape of the ceramic.

Description

technical field [0001] The invention belongs to the technical field of measuring the resistivity of ancient ceramics, and in particular relates to a method for measuring the resistivity of ancient ceramics. Background technique [0002] With the rapid development of science and technology, a variety of scientific and technological identification methods have emerged in the identification of ancient cultural relics, especially the identification of ancient ceramics is relatively mature. The research work on ancient ceramics mainly focuses on the determination of its composition and element content, and there are few studies on the electrical properties of ancient ceramics or related non-destructive measurement methods. [0003] Volume resistivity is the quotient of the DC electric field strength and the steady-state current density in the insulating material, that is, the volume resistance per unit volume. The surface resistivity is the quotient of the DC electric field stre...

Claims

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Application Information

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IPC IPC(8): G01R27/02
CPCG01R27/02
Inventor 王秀峰金晓雪梁亚星
Owner SHAANXI UNIV OF SCI & TECH
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