精细陶瓷(高级陶瓷, 高级工业陶瓷). 氮化硼粉末的化学分析方法

[中文适用范围]： 本标准规定了精细陶瓷原料氮化硼细粉的化学分析方法。 本标准规定了总硼、游离硼、总氮、铝、镉、钙、铬、钴、铜、铁、铅、镁、锰、镍、钾、硅、钠、钛、钒、锌的分析方法。 精细陶瓷用氮化硼粉末中的碳、氧和碳。 总硼通过使用熔融滴定法或熔融电感耦合等离子体发射光谱法 (ICP-OES) 测定。 游离硼通过酸消解 – ICP-OES 或甲醇萃取 – ICP-OES 测定。 如果需要，可以使用分光光度法校正样品处理过程中氮化硼水解产生的硼量。 总氮的测定采用酸压分解-蒸馏分离-滴定法或惰性气体熔融-热导法。 通过使用熔融 ICP-OES 来测定硅。 铝、镉、钙、铬、钴、铜、铁、铅、镁、锰、镍、钛、钒、锌采用酸压分解 – ICP-OES 或熔融 – ICP-OES 测定。 钠和钾通过酸压分解后使用原子吸收光谱法 (AAS)、火焰发射光谱法 (FES) 或 ICP-OES 测定。 碳是通过使用燃烧红外吸收光谱法或燃烧热导率法测定的。 氧气通过惰性气体熔融红外吸收光谱法测定。 [外文原描述]： ISO 17942:2014 specifies the methods for the chemical analysis of fine boron nitride powders used as the raw material for fine ceramics. It stipulates the analysis methods of total boron, free boron, total nitrogen, aluminium, cadmium, calcium, chromium, cobalt, copper, iron, lead, magnesium, manganese, nickel, potassium, silicon, sodium, titanium, vanadium, zinc, carbon, and oxygen in boron nitride powders for fine ceramics. Total boron is determined by using either a fusion?titration method or a fusion?inductively coupled plasma-optical emission spectrometry (ICP-OES). Free boron is determined by using either an acid digestion?ICP-OES or a methanol extraction?ICP-OES. If necessary, the boron amount which arises from the hydrolysis of boron nitride during sample treatment is corrected using spectrophotometry. Total nitrogen is determined by using either an acid pressure decomposition?distillation separation?titration method or an inert gas fusion?thermal conductivity method. Silicon is determined by using a fusion?ICP-OES. Aluminium, cadmium, calcium, chromium, cobalt, copper, iron, lead, magnesium, manganese, nickel, titanium, vanadium, zinc are determined by using an acid pressure decomposition?ICP-OES or a fusion?ICP-OES. Sodium and potassium are determined by using atomic absorption spectrometry (AAS), flame emission spectrometry (FES), or ICP-OES following acid pressure decomposition. Carbon is determined by using a combustion?IR absorption spectrometry or a combustion?thermal conductivity method. Oxygen is determined by using an inert gas fusion?IR absorption spectrometry.