We need your consent to use the individual data so that you can see information about your interests, among other things. Click "OK" to give your consent.
Standard Practices for Measurement of Liquidus Temperature of Glass by the Gradient Furnace Method
Translate name
STANDARD published on 1.2.2022
Designation standards: ASTM C829-81(2022)
Publication date standards: 1.2.2022
SKU: NS-1050988
The number of pages: 9
Approximate weight : 27 g (0.06 lbs)
Country: American technical standard
Category: Technical standards ASTM
Keywords:
crystallization, glass, gradient furnace, liquidus,, ICS Number Code 81.040.10 (Raw materials and raw glass)
Significance and Use | ||||
3.1?These practices are useful for determining the maximum temperature at which crystallization will form in a glass, and a minimum temperature at which a glass can be held, for extended periods of time, without crystal formation and growth. |
||||
1. Scope | ||||
1.1?These practices cover procedures for determining the liquidus temperature (Note 1) of a glass (Note 1) by establishing the boundary temperature for the first crystalline compound, when the glass specimen is held at a specified temperature gradient over its entire length for a period of time necessary to obtain thermal equilibrium between the crystalline and glassy phases. Note 1:?These terms are defined in Terminology C162.
1.2?Two methods are included, differing in the type of sample, apparatus, procedure for positioning the sample, and measurement of temperature gradient in the furnace. Both methods have comparable precision. Method B is preferred for very fluid glasses because it minimizes thermal and mechanical mixing effects. 1.2.1?Method A?employs a trough-type platinum container (tray) in which finely screened glass particles are fused into a thin lath configuration defined by the trough. 1.2.2?Method B?employs a perforated platinum tray on which larger screened particles are positioned one per hole on the plate and are therefore melted separately from each other.2 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. 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. |
||||
2. Referenced Documents | ||||
|
Do you want to be sure about the validity of used regulations?
We offer you a solution so that you could use valid and updated legislative regulations.
Would you like to get more information? Look at this page.
Latest update: 2024-12-23 (Number of items: 2 217 157)
© Copyright 2024 NORMSERVIS s.r.o.