表面电阻率测试标准

表面电阻率测试标准

1 Purpose:

目 的：

1.1To define the requirements and procedures of surface resistivity test.

本文旨在定义表面电阻测量的要求和步骤。

2 Scope:

范 围：

2.1The test method described in the document cover direct­current procedures for

the determination of DC surface resistance and surface resistivity of electrical

materials.

本方法用来测量电气材料的直流表面电阻，表面电阻率。

2.2This document shall be applicable to solid materials and products used and/or

produced by PEAK, except of metal materials..

本规范适用于必佳公司内生产及使用的,除金属材料外，其它固体材料及产 品的表面电阻和/或表面电阻率的测试。

3 Instrument ：

测试仪器

3.1MCP­HT260 Resistivity meter

MCP­HT260型电阻率测试仪

3.2Model PSI­870 Surface Resistance/Resistivity Indicator

PSI­870 型 表面电阻/表面电阻率测试仪

3.3PRF­912 miniature concentric ring fixture

PRF­912型微型同心环型电极

3.4SRM­110 Surface Resistivity Meter

SRM­110 型表面电阻率测试仪。

4 External Reference documents:

外部参考文件：

4.1ASTM D257­93 ：Standard test methods for DC resistance or conductance of

insulating materials

绝缘材料的直流电阻或电导实验方法

4.2ASTM D4496: Test method for DC resistance or conductance of moderately

conductive materials

中等导电材料的直流电阻或电导实验方法。

5 Definitions

定 义

5.1 Moderately conductive­Describe a solid material having a volume resistivity

between 1 and 10,000,000 ohm­cm.

中等导电性：指固体材料的体积电阻率在10­10,000,000ohm­cm

5.2Surface resistance (Rs)­The ratio of the DC voltage applied to the two electrodes

( on the surface of a specimen) to the current between them. expressed in

ohm.(symbol is Ω)

表面电阻(Rs)­施加在试样表面上两电极间的直流电压与通过两电极间的电

流的比值 ；单位是欧姆（ohm,）符号 Ω

5.3 Surface resistivity(ρs)­The surface resistance multiplied by that ratio of the

specimen dimensions (width of electrodes defining the current path divided by

the distance between electrodes) which transforms the measured resistance to

that obtained if the electrodes had formed the opposite sides of a square.

Remarks:Surface resistivity is expressed in ohms. It is popularly expressed also

as ohms/square.(the size of the square is immaterial).

表面电阻率(ρs)­­­平行于材料表面上电流方向的电位梯度与单位宽度上的 电流之比。

注： 表面电阻率的单位是欧姆（ohm, Ω），通常也写为欧姆/平方面积 （ohms/square）， 此处平方面积的大小是非实质的量。

6 General Requirements:

总体要求：

6.1The lab assistant involved in the measurement shall be trained and certified.

实验人员应培训合格方可作业。

6.2 Unless otherwise specified，the minimum sample quantities shall be 3 pieces and

3 points on each sample.

除非特别要求，最少3个测试样品, 每个样品测3个点。

6.3 Both sides/surfaces of samples shall be tested

样品的两面 都应进行测试。

6.4 Unless otherwise specified, Before test starting , sweep off dirt , dust , sweat

stains and other contamination on sample surface with a piece of clean soft cloth.

除非另有要求，测试前，用干净软布擦去样品表面的脏物，灰尘和汗等。

7 Test specimen

实验样品。

7.1The specimen may be of any practical form consistent with the particular

objective, such as flat plates, tapes or tubes.

试样可为任何实际的形状，如平板，带状或管状。

7.2A minimum of three specimen is required.

每种材料最少需要测三个样品。

8 Conditioning.

状态调节

8.1Unless otherwise specified or required, the specimen shall be conditioned under

the condition of 23±2ºC and 50±5%RH.

除非另有要求或说明，测试前试样应在温度23±2ºC，相对湿度50±5%的 条件下进行状态调节。