1.1 这些实践包括确定液相线温度的程序( T L )在600°C至1600°C的温度范围内，对核废物、混合核废物、模拟核废物或危险废物玻璃进行处理。该方法与实践不同 C829 因为它采用了其他方法来确定 T L . T L 在废玻璃工厂操作、玻璃配方和熔化器设计中有用，以确定必须在废玻璃熔体中保持的最低温度，以确保不会发生结晶或低于特定约束，例如1体积%结晶度或 T 1% . 到目前为止，许多研究废物和模拟废物玻璃化的机构对这一限制并不一致 ( 1. ) . 1.2 包括三种方法，不同于( 1. )分析员可用的设备类型（即熔炉和表征设备的类型）( 2. )分析员可用的玻璃数量( 3. )测量所需的精度和准确度，以及( 4. )候选玻璃属性。玻璃特性，例如玻璃挥发性和估计 T L ，将规定进行最精确测量所需的方法。三种不同的测量方法 T L 此处描述包括以下内容:( A. ) 梯度温度炉法（GT） , ( B ) 均温炉法（UT） ，和( C ) 晶体分数外推法（CF） . 本程序旨在提供具体的工作流程，但可由项目经理或主要研究人员认为适当的测试说明进行补充。 此处定义的方法不适用于形成多个不混溶液相的玻璃。在样品制备过程中，可能会在玻璃的初始检查中检测到不混溶性（参见 9.3 ). 然而，在测试进行之前，不混溶性可能不会变得明显。 1.3 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 1.4 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全和健康实践，并确定监管限制的适用性。 ====意义和用途====== 5.1 本程序可用于（但仅限于）以下应用: (1) 支持玻璃配方开发，确保满足加工标准， (2) 支持生产（例如，处理或故障排除），以及 (3) 支持模型验证。

1.1 These practices cover procedures for determining the liquidus temperature ( T L ) of nuclear waste, mixed nuclear waste, simulated nuclear waste, or hazardous waste glass in the temperature range from 600°C to 1600°C. This method differs from Practice C829 in that it employs additional methods to determine T L . T L is useful in waste glass plant operation, glass formulation, and melter design to determine the minimum temperature that must be maintained in a waste glass melt to make sure that crystallization does not occur or is below a particular constraint, for example, 1 volume % crystallinity or T 1% . As of now, many institutions studying waste and simulated waste vitrification are not in agreement regarding this constraint ( 1 ) . 1.2 Three methods are included, differing in ( 1 ) the type of equipment available to the analyst (that is, type of furnace and characterization equipment), ( 2 ) the quantity of glass available to the analyst, ( 3 ) the precision and accuracy desired for the measurement, and ( 4 ) candidate glass properties. The glass properties, for example, glass volatility and estimated T L , will dictate the required method for making the most precise measurement. The three different approaches to measuring T L described here include the following: ( A ) Gradient Temperature Furnace Method (GT) , ( B ) Uniform Temperature Furnace Method (UT) , and ( C ) Crystal Fraction Extrapolation Method (CF) . This procedure is intended to provide specific work processes, but may be supplemented by test instructions as deemed appropriate by the project manager or principle investigator. The methods defined here are not applicable to glasses that form multiple immiscible liquid phases. Immiscibility may be detected in the initial examination of glass during sample preparation (see 9.3 ). However, immiscibility may not become apparent until after testing is underway. 1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.4 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 and health practices and determine the applicability of regulatory limitations prior to use. ====== Significance And Use ====== 5.1 This procedure can be used for (but is limited to) the following applications: (1) support glass formulation development to make sure that processing criteria are met, (2) support production (for example, processing or troubleshooting), and (3) support model validation.