實(shi)驗名稱：鐵電材料極化測試

　　實(shi)驗原理：鐵(tie)(tie)(tie)電(dian)(dian)(dian)(dian)材(cai)(cai)料(liao)是(shi)(shi)指具有自發(fa)極(ji)化(hua)的(de)晶體材(cai)(cai)料(liao)，具有一(yi)系列特殊的(de)電(dian)(dian)(dian)(dian)學和物理性(xing)質。鐵(tie)(tie)(tie)電(dian)(dian)(dian)(dian)測試是(shi)(shi)研究鐵(tie)(tie)(tie)電(dian)(dian)(dian)(dian)材(cai)(cai)料(liao)性(xing)質的(de)關鍵(jian)實(shi)驗手段之(zhi)一(yi)。隨著新型(xing)鐵(tie)(tie)(tie)電(dian)(dian)(dian)(dian)材(cai)(cai)料(liao)的(de)不(bu)斷涌(yong)現(xian)，正確的(de)獲得材(cai)(cai)料(liao)的(de)電(dian)(dian)(dian)(dian)滯回(hui)線和鐵(tie)(tie)(tie)電(dian)(dian)(dian)(dian)參數是(shi)(shi)人們(men)愈來愈關心的(de)問題之(zhi)一(yi)。鐵(tie)(tie)(tie)電(dian)(dian)(dian)(dian)材(cai)(cai)料(liao)的(de)最顯著特征之(zhi)一(yi)是(shi)(shi)能(neng)夠(gou)通過施(shi)加電(dian)(dian)(dian)(dian)場來改(gai)變(bian)其自發(fa)極(ji)化(hua)狀態。為(wei)了進行鐵(tie)(tie)(tie)電(dian)(dian)(dian)(dian)材(cai)(cai)料(liao)的(de)極(ji)化(hua)實(shi)驗，需要使用高壓(ya)放大器提供足夠(gou)強度的(de)電(dian)(dian)(dian)(dian)場。高壓(ya)放大器可(ke)以將低電(dian)(dian)(dian)(dian)壓(ya)信號(hao)放大為(wei)所(suo)需的(de)高電(dian)(dian)(dian)(dian)壓(ya)，以確保(bao)在試樣中施(shi)加足夠(gou)的(de)電(dian)(dian)(dian)(dian)壓(ya)。

　　實驗框圖：

　　實驗系(xi)統實拍圖：

　　實驗過程：

　　上位機通(tong)過系(xi)統(tong)控制器(qi)控制鐵(tie)(tie)(tie)(tie)電(dian)(dian)(dian)(dian)分析(xi)儀產生(sheng)模擬激勵信號(hao)再通(tong)過ATA-67100高壓放(fang)(fang)大(da)器(qi)進行放(fang)(fang)大(da)，輸出(chu)(chu)至測(ce)試樣品兩端產生(sheng)足夠強(qiang)度的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)場，利(li)用(yong)高壓放(fang)(fang)大(da)器(qi)輸出(chu)(chu)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)壓信號(hao)，可以(yi)控制測(ce)試系(xi)統(tong)中(zhong)施加的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)場強(qiang)度和方向，從(cong)(cong)而獲得鐵(tie)(tie)(tie)(tie)電(dian)(dian)(dian)(dian)材料(liao)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)滯回(hui)線。通(tong)過對電(dian)(dian)(dian)(dian)滯回(hui)線的(de)(de)(de)(de)分析(xi)，可以(yi)得到材料(liao)的(de)(de)(de)(de)矯頑場強(qiang)、剩余(yu)極(ji)化強(qiang)度等參數(shu)，從(cong)(cong)而幫(bang)助我們研究(jiu)材料(liao)的(de)(de)(de)(de)鐵(tie)(tie)(tie)(tie)電(dian)(dian)(dian)(dian)性(xing)能和相變(bian)行為。當(dang)高壓放(fang)(fang)大(da)器(qi)輸出(chu)(chu)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)壓信號(hao)加到鐵(tie)(tie)(tie)(tie)電(dian)(dian)(dian)(dian)材料(liao)上時(shi)，材料(liao)內部的(de)(de)(de)(de)極(ji)化強(qiang)度會(hui)發生(sheng)變(bian)化，從(cong)(cong)而改變(bian)材料(liao)的(de)(de)(de)(de)介電(dian)(dian)(dian)(dian)常數(shu)、電(dian)(dian)(dian)(dian)導率等參數(shu)。這(zhe)種(zhong)測(ce)試方法(fa)可以(yi)幫(bang)助我們研究(jiu)鐵(tie)(tie)(tie)(tie)電(dian)(dian)(dian)(dian)材料(liao)的(de)(de)(de)(de)極(ji)化機制和性(xing)能。同(tong)時(shi)利(li)用(yong)顯(xian)微鏡也可以(yi)探(tan)究(jiu)鐵(tie)(tie)(tie)(tie)電(dian)(dian)(dian)(dian)材料(liao)的(de)(de)(de)(de)光學特性(xing)。

　　功率(lv)放大器(qi)推薦：ATA-7000系列高壓放大器(qi)

　　圖：ATA-7000系列高壓放大器指標參數

　　ATA-7000系列是(shi)一款理想的(de)(de)可(ke)放(fang)大交、直(zhi)流(liu)信號的(de)(de)高(gao)壓放(fang)大器。單端輸出20kVp-p（±10kVp）高(gao)壓，可(ke)以驅動高(gao)壓型(xing)負載。電壓增益數控可(ke)調，一鍵保存常(chang)用設置，為您提供了方(fang)便簡(jian)潔的(de)(de)操作(zuo)選擇。

　　功放發揮的(de)效能：實驗中(zhong)需(xu)要8kV的(de)電壓，高壓放大器可以(yi)保證信(xin)號不(bu)失真的(de)前提下，將鐵電分(fen)析儀輸出的(de)信(xin)號放大到千(qian)伏以(yi)上(shang)。同(tong)時控制測試系統中(zhong)施加的(de)電場強度和方向(xiang)，從而獲得鐵電材料的(de)電滯回線。

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