型號(hào)：ZK11986
一、定義：
休止角是指粉體堆積層的自由斜面在靜止的平衡狀態(tài)下，與水平面所形成的角
二、工作原理：
休止角常用的方法是固定圓錐法（亦稱(chēng)殘留圓錐法）。固定圓錐法將粉體注入到某一有限直徑的圓盤(pán)中心上，直到粉體堆積層斜邊的物料沿圓盤(pán)邊緣自動(dòng)流出為止，停止注入，測(cè)定休止角。
三、特點(diǎn)：
測(cè)試粉末和顆粒通過(guò)進(jìn)料漏斗后再流入到測(cè)試漏斗中再自動(dòng)流出堆積，解決粉末和顆粒因加料時(shí)產(chǎn)品本身重力和內(nèi)摩擦對(duì)粉末和顆粒自然流出之影響，得出數(shù)據(jù)更加真實(shí)反映產(chǎn)品本身的特性。
粉體的休止角 < 30o 30o~45o 45o~60o 60o~90o
流動(dòng)性表示: 良好 較好 較差 差
休止角評(píng)價(jià)粉體的流動(dòng)性能，只能表示流動(dòng)性的好壞，或者用于比較同種粉體因水分和粒度等引起的流動(dòng)性差別。
四、標(biāo)準(zhǔn)：
GB11986-89 ISO4324-1977 USP（美國(guó)藥典）、BP （英國(guó)藥典）和EP（歐洲藥典） DIN ISO 4324 - December 1983；
粉末和顆粒休止角測(cè)定儀不僅可以直接測(cè)定，而且可以測(cè)定粉體層的高度和圓盤(pán)半徑后計(jì)算而得。即tanθ=高度/半徑。休止角是檢驗(yàn)粉體流動(dòng)性好壞的的方法。
五、適用范圍：
粉末和顆粒休止角測(cè)定儀廣泛用于制藥、工業(yè)化學(xué)、洗滌、科研院校、質(zhì)檢機(jī)構(gòu)等等相關(guān)粉末粉體及顆粒材料之檢測(cè)；可以提供粉體儲(chǔ)藏性質(zhì)的變化，特別是在料倉(cāng)中儲(chǔ)存情況等。
六、技術(shù)參數(shù)
1.圓盤(pán)： 直徑100mm
2.漏斗： 漏斗頸內(nèi)徑10mm
Beijing Zhongke micro-nano Precision Instrument Co. , Ltd. is a Science and Technology R & D Enterprise registered in Yanqing District Science and Technology Park, Beijing. It has an independent R & D and design team, and cooperates with a number of key laboratories and enterprises in China, to provide technical support and development cooperation, the company has developed a series of testing instruments, mainly covering the fields of powder testing, carbon graphite material testing, battery testing instruments, pre-baked anode and electrode paste testing.
Beijing Zhongke micro-nano Precision Instrument Co. , Ltd. is a Science and Technology R & D Enterprise registered in Yanqing District Science and Technology Park, Beijing. It has an independent R & D and design team, and cooperates with a number of key laboratories and enterprises in China, to provide technical support and development cooperation, the company has developed a series of testing instruments, mainly covering the fields of powder testing, carbon graphite material testing, battery testing instruments, pre-baked anode and electrode paste testing.
采購(gòu)中心
