CN1529183A - Experiment apparatus for measuring ferro electric-hysteresis loop of ferroelectrics - Google Patents
Experiment apparatus for measuring ferro electric-hysteresis loop of ferroelectrics Download PDFInfo
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- CN1529183A CN1529183A CNA031583385A CN03158338A CN1529183A CN 1529183 A CN1529183 A CN 1529183A CN A031583385 A CNA031583385 A CN A031583385A CN 03158338 A CN03158338 A CN 03158338A CN 1529183 A CN1529183 A CN 1529183A
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- resistance
- hysteresis loop
- sample
- ferroelectric hysteresis
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- 238000002474 experimental method Methods 0.000 title abstract description 13
- 238000006243 chemical reaction Methods 0.000 claims abstract description 4
- 238000005259 measurement Methods 0.000 claims description 11
- 239000000919 ceramic Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 3
- 239000003990 capacitor Substances 0.000 description 6
- 230000005684 electric field Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229920002545 silicone oil Polymers 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
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Abstract
The experimental apparatus measures electric hysteresis loop by using inexpensive material with low polarizing voltage as sample. The apparatus cascades the sample on sample holder, capacitance and power source. Cascaded resistance 1 and resistance 2 is connected to the power source in parallel. Signal of polarizing voltage at two ends of resistance 2 as well as signal of voltage at two ends of the capacitance through A/D conversion circuit are entered into computer system for processing so as to obtain relational parameters of the sample. The invention solves issue that there is no suitable experiment-measuring instrument to meet teaching requirement in universities. The invention possesses features of stable experimental data, good repeatability, convenient to plot out electric hysteresis loop. The invention is widely suitable to physics experiment.
Description
One, technical field
The present invention relates to a kind of physics facility, specifically a kind of experimental provision of measuring ferroelectric hysteresis loop.
Two, background technology
Although the ferroelectric hysteresis loop phenomenon is found for a long time, but domestic each colleges and universities are in physics teaching experiment at present, the experiment of ferroelectric hysteresis loop is still blank, reason is: 1, be fit to do the ferroelectrics sample that education experiment uses and be difficult to preparation, piezoceramic material as using, then the measuring samples required voltage is generally up to several kilovolts, and required voltage is too high, as student's education experiment certain danger is arranged, must take the necessary security measure for guaranteeing personal security; 2, the programme-controlled measurement mechanism that does not have complete suitable teaching to require, the experiment device for teaching that some ferroelectric hysteresis loops that use are at present measured mostly is the easy device that temporarily slaps together, and is difficult in maintenance; 3, use ordinary oscilloscope qualitative observation curve, data recording out of true usually.
Three, summary of the invention
The purpose of this invention is to provide a kind of programme-controlled experimental provision of measuring ferroelectric hysteresis loop with the material inexpensive, that polarizing voltage is low as sample.
The objective of the invention is to be achieved through the following technical solutions:
A kind of experimental provision of measuring ferroelectric hysteresis loop is characterized in that: specimen holder, capacitor C and the power supply AC that will place sample M are connected in series; Resistance R 1 and resistance R 2 are cascaded and are connected in parallel with power supply AC; The capacitance voltage signal Y at the polarizing voltage signal X at resistance R 2 two ends and capacitor C two ends enters computer system processor by analog to digital conversion circuit.Utilize computerized Experiment Data Records instrument, record polarizing voltage signal X and capacitance voltage signal Y, and draw empirical curve, thus obtain the related parameter that has of sample M.In the experimental provision of measurement ferroelectric hysteresis loop of the present invention, sample M selects the common piezoelectric ceramics that can buy on the market for use.
Accurate for guaranteeing experiment effect the best, data, supply voltage described in the present invention is that AC 150V～1500V is adjustable, frequency is 50Hz; Resistance R 1 is that 1M, resistance R 2 are 1K; Capacitor C is 0.1 μ f.
Adopt the experimental provision of measurement ferroelectric hysteresis loop of the present invention, when measuring Curie point, specimen holder and sample M can be placed in the silicone oil jointly, progressively heating, the Curie-point temperature of record sample M.
The experimental provision of measurement ferroelectric hysteresis loop of the present invention has thoroughly solved present domestic each colleges and universities in physics teaching experiment, is fit to the situation of the experiment measuring instrument of teaching requirement, complete, programme-controlled ferroelectric hysteresis loop.After adopting the present invention, its advantage is: 1, can provide different polarized electric fields with different sample M according to different measuring conditions, polarizing voltage is controlled in the 250V, safe and reliable, experimental data is stable, and good reproducibility can make things convenient for, intactly draw out ferroelectric hysteresis loop; 2, the present device compactness is easy and simple to handle, has microcomputer interface, and measurement data and empirical curve can dynamically show on computer screen intuitively.
Four, description of drawings
Fig. 1 is a synoptic diagram of the present invention;
Fig. 2 is the ferroelectric hysteresis loop curve that adopts the present invention to measure.
Five, embodiment
A kind of experimental provision of measuring ferroelectric hysteresis loop, the sample M, capacitor C and the power supply AC that are placed in the specimen holder 1 are connected in series, sample M selects the common piezoelectric ceramics that can buy on the market for use, and capacitor C is 0.1 μ f, and supply voltage is that AC 150V～1500V is adjustable, frequency is 50Hz; Resistance R 1 and resistance R 2 are cascaded and are connected in parallel with power supply AC; Resistance R 1 is that 1M, resistance R 2 are 1K.The capacitance voltage signal Y at the polarizing voltage signal X at resistance R 2 two ends and capacitor C two ends enters computer system processor by analog to digital conversion circuit.The present invention has safety guarantee function, when changing sample M, and automatic cutoff high power supply, during measurement, the self-locking device restriction touches sample.
Utilize " rapid development " computerized Experiment Data Records instrument, record polarizing voltage signal X and capacitance voltage signal Y draw empirical curve.Convenient intactly write down ferroelectric hysteresis loop and with variation of temperature.And can on computer screen, dynamically show the measurement curve intuitively.
Simultaneously can quantitative measurment residual electric polarization and coercive electric field intensity; Measure loss angle, measure ferroelectric Curie point.When measuring Curie point, specimen holder and sample M can be placed in the silicone oil jointly progressively heating, the Curie-point temperature of record sample M.
By above experiment, obtain the ferroelectric hysteresis loop curve map among Fig. 2, wherein:
Polarizing voltage signal directions X scale: 50V/div;
Capacitance voltage signal Y deflection scale: 100mv/div;
Measurement gained polarizing voltage signal directions X range of signal :-140V～+ 140V;
Measurement gained capacitance voltage signal Y direction signal scope :-150mV～+ 150mV.
Claims (3)
1, a kind of experimental provision of measuring ferroelectric hysteresis loop is characterized in that: specimen holder (1), electric capacity (C) and the power supply (AC) that will place sample (M) are connected in series; Resistance (R1) and resistance (R2) are cascaded and are connected in parallel with power supply (AC); The voltage signal (Y) at the polarizing voltage signal (X) at resistance (R2) two ends and electric capacity (C) two ends enters computer system processor by analog to digital conversion circuit.
2, the experimental provision of measurement ferroelectric hysteresis loop according to claim 1 is characterized in that: what place in the described specimen holder (1) can be common piezoelectric ceramics.
3, the experimental provision of measurement ferroelectric hysteresis loop according to claim 1 is characterized in that: 150V～1500V is adjustable in order to exchange, frequency is 50Hz for described supply voltage; Resistance (R1) is that 1M, resistance (R2) are 1K; Electric capacity (C) is 0.1 μ f.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031583385A CN1529183A (en) | 2003-09-26 | 2003-09-26 | Experiment apparatus for measuring ferro electric-hysteresis loop of ferroelectrics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031583385A CN1529183A (en) | 2003-09-26 | 2003-09-26 | Experiment apparatus for measuring ferro electric-hysteresis loop of ferroelectrics |
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| Publication Number | Publication Date |
|---|---|
| CN1529183A true CN1529183A (en) | 2004-09-15 |
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| CNA031583385A Pending CN1529183A (en) | 2003-09-26 | 2003-09-26 | Experiment apparatus for measuring ferro electric-hysteresis loop of ferroelectrics |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323495A (en) * | 2011-05-27 | 2012-01-18 | 清华大学 | Device and method for measuring polarization reversal curve of ferroelectric material |
| CN104101792A (en) * | 2013-04-11 | 2014-10-15 | 中国科学院上海硅酸盐研究所 | Ferroelectric material ferroelectricity and ferroelasticity measuring system and method under force field, electric field and thermal field |
| CN106950444A (en) * | 2017-03-08 | 2017-07-14 | 天津大学 | A kind of measuring method of ferroelectric materials electric hysteresis loop wire |
| CN108254594A (en) * | 2018-01-23 | 2018-07-06 | 中国科学院上海硅酸盐研究所 | The alternating temperature hysteresis fixture and test method of material under a kind of high electric field |
| CN110231525A (en) * | 2019-06-05 | 2019-09-13 | 东南大学 | A kind of measuring system suitable for ferroelectricity photovoltaic material |
-
2003
- 2003-09-26 CN CNA031583385A patent/CN1529183A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323495A (en) * | 2011-05-27 | 2012-01-18 | 清华大学 | Device and method for measuring polarization reversal curve of ferroelectric material |
| CN102323495B (en) * | 2011-05-27 | 2013-07-03 | 清华大学 | Device and method for measuring polarization reversal curve of ferroelectric material |
| CN104101792A (en) * | 2013-04-11 | 2014-10-15 | 中国科学院上海硅酸盐研究所 | Ferroelectric material ferroelectricity and ferroelasticity measuring system and method under force field, electric field and thermal field |
| CN106950444A (en) * | 2017-03-08 | 2017-07-14 | 天津大学 | A kind of measuring method of ferroelectric materials electric hysteresis loop wire |
| CN108254594A (en) * | 2018-01-23 | 2018-07-06 | 中国科学院上海硅酸盐研究所 | The alternating temperature hysteresis fixture and test method of material under a kind of high electric field |
| CN110231525A (en) * | 2019-06-05 | 2019-09-13 | 东南大学 | A kind of measuring system suitable for ferroelectricity photovoltaic material |
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