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style="font-size:16px;"></span><img src="//www.zalypq.com.cn/uploads/news/20171019020010.jpg" /><span style="font-size:16px;"></span> </p> <p> <span style="font-size:16px;">ä¸ÞZº†æ»¡èƒö各种复杂甚至ç›?/span><span style="font-size:16px;">互矛盄¡š„甉|°”接触材料要求åQŒé‡‘属陶ç“ähæ–™å·²¾lå¼€å‘出来ã€?/span> </p> <span style="font-size:16px;">它是两相金属的机械æ؜合物åQŒæ¯ä¸€¿Uéƒ½ä¿ç•™å…¶ç‰©ç†æ€§è´¨ã€‚两盔R‡‘属熔体阶ŒDµï¼Œåœ¨å…¶é«˜ç¡¬åº¦ã€é«˜ç†”点的一个阶ŒDµï¼Œåœ¨é«˜æ¸©å’Œå†²å‡»ä½œç”¨ä¸‹ä¸å˜åŞåQŒåœ¨ç”µå¼§ä¸ç†”化的作用下,金属骨架在材料中的作用。这¿Ué‡‘属有钨、钼、金属氧化物½{‰ã€‚另一盔R‡‘属是载流相,主要表现为导电和导热。这¿Ué‡‘属银、铜½{‰é‡‘属蝲‹¹ç†”点较ä½?在电弧高温作用下融化成液ä½?òq¶ä¿æŒåœ¨è€ç«ææ–™åœ¨é‡‘属框架的¾l„成相空é—?防止熔融金属的溢å‡?使接触电¼‚¨æŸå¤§å¤§é™ä½Žã€‚以下是一些常见的金属陶瓷材料:</span><br /> <span style="font-size:16px;">(1)银氧化镉å…ähœ‰è€ç”µæ€§ã€è€ç„ŠæŽ¥æ€§ã€æŠ—接触性低的特炏V€‚它òq¿æ³›åº”用于中ç”는µå­ã€‚è¿™¿Uææ–™å…·æœ‰è¿™äº›ä¼˜è‰¯æ€§èƒ½çš„原因是:</span><br /> <span style="font-size:16px;">1)弧氧化镉的作用下分解,从固体升华äؓ气体分解温度(900â„?,产生强烈的蒸å?爆炸效果,和清‹zæŽ¥è§¦è¡¨é?</span><br /> <span style="font-size:16px;">2)当氧化镉分解æ—Óž¼Œå¸æ”¶äº†å¤§é‡çš„热量åQŒæœ‰åˆ©äºŽå†·å´å’Œç­å¼§ã€?/span><br /> <span style="font-size:16px;">3)氧化镉颗¾_’的分散会增加熔融材料的¾_˜åº¦åQŒå‡ž®‘金属的溅射损失ã€?/span><br /> <span style="font-size:16px;">4)镉蒸汽部分与氧气¾l“合åQŒåŞ成固体氧化物镉,沉积在接触表面的表面åQŒç»„¾l‡æŽ¥è§¦å¤´ç„ŠæŽ¥ã€?/span><br /> <span style="font-size:16px;">氧化镉的含量可以优化12% ~ 15%。如果在银氧化物镉中加入微量元素åQŒå¦‚¼‹…、铝、钙½{‰ï¼Œå¯ä»¥˜q›ä¸€æ­¥ç»†åŒ–晶¾_’,提高耐磨性ã€?/span><br /> <span style="font-size:16px;">(2)铉™’¨ææ–™åˆ†åˆ«å…ähœ‰é“¶ã€é’¨çš„优炏V€‚随着钨含量的增加åQŒç”µå¼§ç£¨æŸæ€§èƒ½å’Œç„ŠæŽ¥ç”µé˜ÀLé«˜ï¼Œä½†ç”µå¯¼çŽ‡é™ä½Žã€‚低电压开关通常使用é’?0% ~ 40%的材料,高压开关钨60% ~ 80%的材料ã€?/span><br /> <span style="font-size:16px;">é“?钨的劣势æ˜?接触电阻增加的数量增加和开攑֒Œå¯†åˆ‡æŽ¥è§¦,严重病例可达到十倍以上的初始å€?因äؓ在断裂过½E‹ä¸­,接触表面ž®†äñ”生三氧化钨电è‡?或银钨酸(Ag2WO4)电媄,˜q™éƒ¨ç”µåª„是不导电,接触电阻ã€?/span><br /> <span style="font-size:16px;">(3)铜、钨的材料性能与银钨相ä¼û|¼Œä½†æ¯”铉™’¨æ›´å®¹æ˜“氧化,形成CuWO4薄膜åQŒä‹É接触电阻飙升。它不适合于空气开兌™§¦ç‚¹ï¼Œä½†å¯ç”¨ä½œæ²¹å¼€å…Œ™§¦ç‚V€?/span><br /> <span style="font-size:16px;">(4)银石墨具有良好的导电性,接触电阻ž®ï¼Œç„ŠæŽ¥æ€§èƒ½å¥½ï¼Œ¾~ºç‚¹æ˜¯ç”µåŠ¨ç£¨æŸå¤§ã€‚石墨的òq›_‡å«é‡ä¸è¶…˜q?%ã€?/span><br /> <span style="font-size:16px;">(5)铉™“å…ähœ‰è‰¯å¥½çš„导甉|€§ã€å¯¼çƒ­æ€§å’Œè€ç”µæ€§ã€‚中、小甉|µæŽ¥è§¦çš„电寿命成倍增加。它的主要缺ç‚ÒŽ˜¯å®ƒå®¹æ˜“在大气中生锈ã€?/span><br /> <div class="fqb"> <br /> </div></p> </div> <div class="pagess"> <ul class="fqb"><div class="fqb">上一æ?<a href="109.html">影响¼‹¬è´¨åˆé‡‘刀片质量的因素有哪äº?/a></div> <div class="fqb">下一æ?<a href="107.html">¼„›_Œ–¼‹…制品的应用</a></div> </ul> </div> <div class="info_key">相关标签åQ?a href='/key.aspx?k=%bd%f0%ca%f4%cc%d5%b4%c9'>金属陶瓷</a>,<a href='/key.aspx?k=%bd%f0%ca%f4%cc%d5%b4%c9%b2%c4%c1%cf'>金属陶瓷材料</a>,<a href='/key.aspx?k=%bd%f0%ca%f4%cc%d5%b4%c9%b5%bc%c2%d6'>金属陶瓷å¯ÆD½®</a>,</div> </div> <div class="clear"></div> <div class="cateslist"> <dl> <dt>相关产品</dt> <dd> <div class="img"> <a href="/supply/22.html" title="金属陶瓷å¯ÆD½®" rel="nofollow"><img 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