1.1 这些试验方法包括测定化学成分在以下范围内的氮化硅粉末中碳、氮和氧的质量分数%: 元素 质量分数%范围 碳 0.05至5.0 氮气 30至45岁 氧气 0.1至1.5 1.2 本标准中有两种测试方法: 1.2.1 直接燃烧红外测量法测定总碳。 1.2.2 氮气采用惰性气体熔融热导率测量方法，氧气采用惰性气体熔化红外测量方法。 1.3 本标准并不旨在解决与其使用相关的所有安全问题（如果有的话）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践，并确定监管限制的适用性。 第节给出了具体的危害说明 6. . 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 =====意义和用途====== 3.1 这些测试方法用于氮化硅粉末中碳、氮和氧的质量分数的化学分析。它们用于研究、开发、生产、验收和质量控制用于生产氮化硅含量陶瓷元件的氮化硅粉末。 3.2 假设所有使用这些测试方法的人都是经过培训的分析师，能够熟练、安全地执行常见的实验室程序。预计工作将在设备齐全的实验室进行。

1.1 These test methods cover the determination of mass fraction % of carbon, nitrogen, and oxygen in silicon nitride powder having chemical compositions within the following limits: Element Mass Fraction % Range Carbon 0.05 to 5.0 Nitrogen 30 to 45 Oxygen 0.1 to 1.5 1.2 Two test methods appear in this standard: 1.2.1 Total Carbon by the Direct Combustion-Infrared Measurement Method. 1.2.2 Nitrogen by the Inert Gas Fusion-Thermal Conductivity Measurement Method and Oxygen by the Inert Gas Fusion-Infrared Measurement Method. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Specific hazard statements are given in Section 6 . 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 3.1 These test methods are for the chemical analysis of mass fraction of carbon, nitrogen, and oxygen in silicon nitride powder. They are used in research, development, production, acceptance, and quality control of silicon nitride powders used to produce ceramic components with silicon nitride content. 3.2 It is assumed that all who use these test methods will be trained analysts capable of performing common laboratory procedures skillfully and safely. It is expected that work will be performed in a properly equipped laboratory.