[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fvTb-3YmDuP-FvLghkTsGVcoUp4Dadz-VopxFzGAEix8":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":8,"question":15,"related":16,"source":22,"type":23},[],"2025-12-23 13:06:28",282410735,[],{"count":9,"courseId":10,"courseImg":11,"courseName":12,"workId":13,"workName":14},30,"9c45935a11999b6d5f45e0bd43bce672","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fdc8b00e976ef74e751d0c8ca7e3352c3.png","无机材料科学基础","work_49051907","U3 词汇练习","粉料粒度为5μm时,经2h烧结后,x\u002Fr =0.1.若不考虑晶粒生长,烧结至x\u002Fr =0.2.并分别通过蒸发-凝聚;体积扩散;粘性流动;溶解-沉淀传质,各需要多少时间?若烧结时间为8h,各个传质过程的颈部增长x\u002Fr又是多少",[17,24,29,34,37,42,47,52,57,62],{"answer":18,"createTime":5,"id":19,"options":20,"question":21,"source":22,"type":23},[],282410732,[],"名词解释熔融温度、烧结温度与泰曼温度;体积密度、理论密度与相对密度;液相烧结与固相烧结;晶粒生长与二次再结晶;晶粒平均尺寸与晶粒极限尺寸;、烧结、烧成","v1",4,{"answer":25,"createTime":5,"id":26,"options":27,"question":28,"source":22,"type":23},[],282410733,[],"烧结的模型有哪几种?各适应于哪些典型的传质过程",{"answer":30,"createTime":5,"id":31,"options":32,"question":33,"source":22,"type":23},[],282410734,[],"设固-气界面能为0.1J\u002Fm2,若用直径为1um的粒子组成压块体积1cm3,试计算由烧结推动力而产生的能量是多少",{"answer":35,"createTime":5,"id":6,"options":36,"question":15,"source":22,"type":23},[],[],{"answer":38,"createTime":5,"id":39,"options":40,"question":41,"source":22,"type":23},[],282410736,[],"如9-4题的粉料粒度为16μm,烧结至x\u002Fr =0.2,各个传质需要多长时间?若烧结时间为8h,各个传质过程的颈部增长x\u002Fr又是多少?从两题的计算结果,讨论粒度与烧结时间对4种传质过程的影响程度",{"answer":43,"createTime":5,"id":44,"options":45,"question":46,"source":22,"type":23},[],282410737,[],"在烧结过程中,哪些能使烧结产物强度增加,而不产生致密化过程?试说明理由. (1)蒸发-凝聚;(2)体积扩散;(3)粘性流动;(4)晶界扩散;(5)表面扩散;(6)溶解-沉淀",{"answer":48,"createTime":5,"id":49,"options":50,"question":51,"source":22,"type":23},[],282410738,[],"在1500℃下MgO正常生长晶粒长大期间,观察到晶体在1h内从1um长大到10um.已知晶界扩散激活能为251kJ\u002Fmol,预测1600 ℃保温4h后晶粒的大小.并估计杂质对MgO晶粒生长速率有何影响,为什么",{"answer":53,"createTime":5,"id":54,"options":55,"question":56,"source":22,"type":23},[],282410739,[],"晶界遇到夹杂物时会出现几种情况?从实现烧结体致密化考虑,晶界应如何移动?怎样控制",{"answer":58,"createTime":5,"id":59,"options":60,"question":61,"source":22,"type":23},[],282410740,[],"在烧结时,晶粒生长能促进坯体致密化吗?晶粒生长会影响烧结速率吗?说明之",{"answer":63,"createTime":5,"id":64,"options":65,"question":66,"source":22,"type":23},[],282410741,[],"说明影响烧结的因素有哪些?最易控制的因素是哪几个"]