導電膠粘劑的性能原理詳細分析3

　　銅(tong)(tong)(tong)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)率(lv)與銀(yin)附近，價格(ge)低廉，是(shi)一種相對(dui)抱負(fu)的(de)(de)(de)導(dao)(dao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)填(tian)料(liao)(liao)。但銅(tong)(tong)(tong)在(zai)(zai)(zai)空氣中(zhong)易被(bei)氧(yang)化，在(zai)(zai)(zai)銅(tong)(tong)(tong)粉(fen)(fen)(fen)(fen)外(wai)(wai)表(biao)易構(gou)成一層氧(yang)化膜，然后(hou)(hou)影響(xiang)銅(tong)(tong)(tong)導(dao)(dao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)膠(jiao)粘(zhan)(zhan)(zhan)劑(ji)(ji)(ji)(ji)的(de)(de)(de)導(dao)(dao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)性。因而，運用(yong)(yong)銅(tong)(tong)(tong)粉(fen)(fen)(fen)(fen)制(zhi)造導(dao)(dao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)膠(jiao)粘(zhan)(zhan)(zhan)劑(ji)(ji)(ji)(ji)時(shi)(shi)，應對(dui)銅(tong)(tong)(tong)粉(fen)(fen)(fen)(fen)進(jin)(jin)行預處(chu)置或(huo)在(zai)(zai)(zai)制(zhi)造過程中(zhong)參(can)加(jia)相應的(de)(de)(de)助劑(ji)(ji)(ji)(ji)，以(yi)(yi)除(chu)掉(diao)外(wai)(wai)表(biao)氧(yang)化層，進(jin)(jin)步其導(dao)(dao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)性。劉運學(xue)等(deng)以(yi)(yi)環(huan)氧(yang)樹脂(zhi)E-51為(wei)(wei)(wei)(wei)(wei)(wei)基體，二乙(yi)烯三胺為(wei)(wei)(wei)(wei)(wei)(wei)固化劑(ji)(ji)(ji)(ji)，選(xuan)用(yong)(yong)硅烷偶聯劑(ji)(ji)(ji)(ji)KH550對(dui)銅(tong)(tong)(tong)粉(fen)(fen)(fen)(fen)進(jin)(jin)行改(gai)性處(chu)置，并(bing)以(yi)(yi)改(gai)性后(hou)(hou)的(de)(de)(de)銅(tong)(tong)(tong)粉(fen)(fen)(fen)(fen)作為(wei)(wei)(wei)(wei)(wei)(wei)導(dao)(dao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)填(tian)料(liao)(liao)，在(zai)(zai)(zai)填(tian)充質(zhi)(zhi)量分數(shu)為(wei)(wei)(wei)(wei)(wei)(wei)65%時(shi)(shi)制(zhi)備出(chu)(chu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)率(lv)為(wei)(wei)(wei)(wei)(wei)(wei)1.5×10–3Ω·cm，剪(jian)切(qie)強度(du)(du)大(da)于(yu)20MPa的(de)(de)(de)銅(tong)(tong)(tong)導(dao)(dao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)膠(jiao)粘(zhan)(zhan)(zhan)劑(ji)(ji)(ji)(ji)，經(jing)室溫(wen)(wen)1000h老化實驗后(hou)(hou)該導(dao)(dao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)膠(jiao)粘(zhan)(zhan)(zhan)劑(ji)(ji)(ji)(ji)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)率(lv)和(he)剪(jian)切(qie)強度(du)(du)改(gai)變(bian)均(jun)小于(yu)20%，其粘(zhan)(zhan)(zhan)接(jie)功(gong)用(yong)(yong)、導(dao)(dao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)功(gong)用(yong)(yong)和(he)耐(nai)老化功(gong)用(yong)(yong)均(jun)滿意運用(yong)(yong)要求;張(zhang)博等(deng)用(yong)(yong)硅烷偶聯劑(ji)(ji)(ji)(ji)對(dui)納米和(he)微米球(qiu)形銅(tong)(tong)(tong)粉(fen)(fen)(fen)(fen)進(jin)(jin)行外(wai)(wai)表(biao)改(gai)性，在(zai)(zai)(zai)銅(tong)(tong)(tong)粉(fen)(fen)(fen)(fen)填(tian)充質(zhi)(zhi)量分數(shu)為(wei)(wei)(wei)(wei)(wei)(wei)65%時(shi)(shi)，研宣布了電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)率(lv)為(wei)(wei)(wei)(wei)(wei)(wei)3.6×10–4Ω·cm，剪(jian)切(qie)強度(du)(du)為(wei)(wei)(wei)(wei)(wei)(wei)17.6MPa的(de)(de)(de)銅(tong)(tong)(tong)導(dao)(dao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)膠(jiao)粘(zhan)(zhan)(zhan)劑(ji)(ji)(ji)(ji)，該導(dao)(dao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)膠(jiao)粘(zhan)(zhan)(zhan)劑(ji)(ji)(ji)(ji)具(ju)有(you)(you)優秀的(de)(de)(de)耐(nai)熱性和(he)穩定(ding)性，在(zai)(zai)(zai)溫(wen)(wen)度(du)(du)為(wei)(wei)(wei)(wei)(wei)(wei)85℃，相對(dui)濕度(du)(du)為(wei)(wei)(wei)(wei)(wei)(wei)85%RH的(de)(de)(de)環(huan)境下通過1000h老化測驗后(hou)(hou)，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)率(lv)和(he)剪(jian)切(qie)強度(du)(du)的(de)(de)(de)改(gai)變(bian)均(jun)不超越(yue)10%。為(wei)(wei)(wei)(wei)(wei)(wei)了處(chu)置銅(tong)(tong)(tong)粉(fen)(fen)(fen)(fen)在(zai)(zai)(zai)空氣中(zhong)易被(bei)氧(yang)化這個(ge)難題，能(neng)夠(gou)在(zai)(zai)(zai)銅(tong)(tong)(tong)粉(fen)(fen)(fen)(fen)外(wai)(wai)表(biao)進(jin)(jin)行鍍銀(yin)。這樣不只(zhi)能(neng)克服銅(tong)(tong)(tong)粉(fen)(fen)(fen)(fen)易被(bei)氧(yang)化的(de)(de)(de)缺點(dian)，一起(qi)還(huan)能(neng)夠(gou)進(jin)(jin)步銅(tong)(tong)(tong)粉(fen)(fen)(fen)(fen)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)導(dao)(dao)率(lv)。杜亮亮等(deng)選(xuan)用(yong)(yong)雙酚A型環(huan)氧(yang)樹脂(zhi)為(wei)(wei)(wei)(wei)(wei)(wei)基體，銀(yin)包銅(tong)(tong)(tong)粉(fen)(fen)(fen)(fen)為(wei)(wei)(wei)(wei)(wei)(wei)導(dao)(dao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)填(tian)料(liao)(liao)，在(zai)(zai)(zai)填(tian)充質(zhi)(zhi)量分數(shu)僅為(wei)(wei)(wei)(wei)(wei)(wei)55%時(shi)(shi)，制(zhi)備出(chu)(chu)了電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)率(lv)為(wei)(wei)(wei)(wei)(wei)(wei)8.9×10–4Ω·cm的(de)(de)(de)導(dao)(dao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)膠(jiao)粘(zhan)(zhan)(zhan)劑(ji)(ji)(ji)(ji)。Zhang等(deng)運用(yong)(yong)片狀鍍銀(yin)銅(tong)(tong)(tong)粉(fen)(fen)(fen)(fen)研發(fa)得到電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)率(lv)為(wei)(wei)(wei)(wei)(wei)(wei)2.4×10–4Ω·cm的(de)(de)(de)各向同(tong)性導(dao)(dao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)膠(jiao)粘(zhan)(zhan)(zhan)劑(ji)(ji)(ji)(ji)，在(zai)(zai)(zai)相對(dui)濕度(du)(du)為(wei)(wei)(wei)(wei)(wei)(wei)85%RH，溫(wen)(wen)度(du)(du)為(wei)(wei)(wei)(wei)(wei)(wei)85~225℃時(shi)(shi)，回流1000h后(hou)(hou)，該導(dao)(dao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)膠(jiao)粘(zhan)(zhan)(zhan)劑(ji)(ji)(ji)(ji)仍具(ju)有(you)(you)極好的(de)(de)(de)穩定(ding)性，這表(biao)明該鍍銀(yin)銅(tong)(tong)(tong)粉(fen)(fen)(fen)(fen)具(ju)有(you)(you)杰出(chu)(chu)的(de)(de)(de)抗氧(yang)化性