BAIJIAN - Material testing agency
At room temperature、 helium is an extremely light、 colorless、 odorless、 and odorless single atom gas. It is the most difficult to liquefy substance among all gases and cannot solidify at standard atmospheric pressure. When the temperature drops to 2.174K after liquefaction、 it has special properties such as low surface tension、 strong thermal conductivity、 and extremely low viscosity. Low temperatures near absolute zero can be obtained using liquid helium. Stable chemical performance、 showing a deep yellow color during low voltage discharge. Generally、 compounds are not generated and can form He2+、 HeH plasma、 and molecules when excited in low-voltage discharge tubes. In general、 it is difficult to react with other substances、 and under specific conditions、 compounds can be formed with certain metals. When the temperature drops to 2.18K、 liquid helium undergoes a sudden change in its properties、 with minimal viscosity、 becoming a superfluid that can flow upwards along the container wall. Its thermal conductivity is 800 times that of copper、 making it a thermal conductor with excellent thermal conductivity. Its specific heat capacity、 surface tension、 and compressibility are all abnormal. This abnormal liquid is called liquid helium II、 while normal liquid helium is called liquid helium I
Function of testing report:
1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report
2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms 3. Used as a sales report: issuing legally effective testing reports to make consumers more confident 4. Papers and research: Provide professional personalized testing needs 5. Judicial services: providing scientific、 fair、 and accurate testing data 6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problemsinspection and testing process:
1. Telephone communication and confirmation of requirements
2. Recommend solutions and confirm quotations 3. Mail samples and arrange testing 4. Progress tracking and result feedback 5. Provide reports and after-sales service 6. If urgent or priority processing is requiredTesting and testing characteristics:
1. The testing industry is fully covered、 meeting different testing needs
2. Fully cover the laboratory and allocate localized testing nearby3. Engineers provide one-on-one services to make testing more accurate
4. Free initial testing、 with no testing fees charged
5. Self service order delivery for free on-site sampling
6. Short cycle、 low cost、 and attentive service 7. Possess authoritative qualifications such as CMA、 CNAS、 CAL、 etc 8. The testing report is authoritative and effective、 and is generally used in China