High Purity Quartz Round Bottom Tubes for Science and Technology Laboratory-Mia

Customer Overview
This is a key materials research laboratory affiliated to Hanoi University of Science and Technology, focusing on optoelectronic material performance testing and high-temperature photochemical reaction experiments. Its core experimental equipment uses high-power xenon lamps as a stable light source, and has long relied on bulk-purchased quartz round-bottom tubes for lamp body encapsulation.

Customer Pain Points
The locally procured quartz round-bottom tubes lack sufficient purity control, which leads to obvious light attenuation after the xenon lamp is energized for a long time. Fine stripes and tiny bubbles are prone to form on the inner wall of the tubes, resulting in uneven light spots during the experiment and undermining the accuracy of experimental data. Although a small number of high-quality imported products on the market can meet the experimental standards, their unit price is more than three times that of domestic products, and the delivery cycle is as long as 3 to 4 months, which seriously delays the progress of the laboratory's new projects.

Customer Requirements
The laboratory is in urgent need of a batch of xenon-lamp-grade high-purity quartz round-bottom tubes covering the conventional specifications of its experimental platform. It has strict requirements for the uniformity of the round-bottom sealing, extremely low hydroxyl content, high light transmittance in the visible-near-infrared band, and excellent thermal shock resistance. The laboratory hopes to arrange a small-batch trial first, and requires the supplier to provide complete material composition test reports, documents that meet the customs clearance requirements of Vietnam, and English material certification documents that satisfy the laboratory's filing standards.

Project Process
Quotation and Communication: At the initial stage of communication, the laboratory expected the procurement cost to be close to the price of local ordinary quartz tubes. Instead of following up the quotation directly, we combined the actual working conditions of long-term xenon lamp operation to elaborate on the core impact of quartz tube purity, sealing process and stress control on light source service life and experimental data stability. We also pointed out the hidden risk of frequent replacement of low-cost tubes, which would delay the experimental cycle. The laboratory quickly recognized the core value of high-quality special materials and adjusted to a reasonable procurement budget.

Sample Verification: We sent customized quartz round-bottom tube samples, accompanied by a full set of test reports. The laboratory installed the samples on its self-developed xenon lamp experimental platform, carried out a 72-hour continuous operation test and a rapid cooling-heating cycle test, focusing on detecting the light source output stability and the sealing performance of the round-bottom part. The test results showed that the sample tubes passed the sample verification.

First Trial Order: The laboratory placed a small-batch trial order covering 3 conventional specifications. We strictly controlled the one-time hot-melt sealing process of the round bottom, eliminated the residual stress at the sealing joint through multi-stage slow annealing, and conducted full-dimensional optical inspection and air tightness test on each quartz tube. In terms of export packaging, we used shockproof foam to fix the finished tubes and then placed them in thickened corrugated cartons, so as to avoid collision and damage during long-distance transportation.