GB/T 10701-2008Test methods for thermal stability of silica glass (English PDF)

3.1 Test Equipment

3.1.1 high-temperature furnace. maximum temperature T1 should be able to meet the requirements of the test temperature, the size specifications should be suitable for the test sample size, test security Temperature stage furnace temperature does not fluctuate more than ± 5 °C.

3.1.2 Cooling tank. diameter or length was longer than 300mm, 350mm ~ 400mm high rust sink. Into the water tank, the water level Height of 250mm ~ 300mm, and put two layers of gauze to hold the specimen is immersed in water.

3.1.3 Thermometer. Measuring range 0 °C ~ 50 °C thermometer.

3.1.4 quartz glass specimen rack or tray.

3.1.5 chrome crucible tongs.

3.1.6 purity of chemically pure ethanol.

3.1.7 Common Clock

3.2 Sample Preparation

A variety of quartz glass sample size should be consistent with the provisions in Table 1. Samples were cut at the required grinding and polishing process to remove cleavage Cracks, defects such as gaps and caving.

Table 1 Sample size in millimeters

Sample name Sample size all kinds of quartz glass tube diameter <=80, the length of the rod pipe 60 Diameter > 80 various quartz glass tube length (50) × chord (50) × wall thickness of the original sheet Transparent and opaque quartz glass plate-like length (50) × width (50) × original thickness of the block Transparent crucible, evaporating dish, test tubes, funnel, boats, and other vessels cover the whole article

3.3 Test preparation

Placed in the furnace bottom quartz glass spacers, the furnace is heated to a predetermined upper limit temperature T1. After the sample was rinsed with tap water anhydrous Alcohol wipe, and then rinsed with deionized water sample, and finally dry with gauze and set aside.

4.1 Water cooling method (A method)

4.1.1 The prepared sample was placed on a quartz glass specimen rack or tray, then placed in a heating temperature T1 to a high temperature furnace workspace center. Allows multiple simultaneous test sample, but not placed one, and should ensure that the specimen without any external force out of the furnace operation.