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Detect the supply voltage of the quartz tube

When detecting the power supply voltage of the quartz tube, first adjust the range of the multimeter to the "AC 250V" voltage block, and the red and black test pens are respectively placed on the power supply end of the quartz tube. At this time, observe the reading of the multimeter. If it is around 220V AC, it means that the power supply voltage of the quartz tube is normal.

Check the resistance of the quartz tube

The resistance value of the quartz tube can be detected by a multimeter, adjust the multimeter gear to "buzzer", and place the red and black test pens on both ends of the quartz tube. zero. If there is no sound from the buzzer of the multimeter and the pointer points to infinity during detection, it means that the inside of the quartz tube is damaged.

physical properties

Quartz glass has a very small thermal expansion coefficient and can withstand severe temperature changes. Quartz glass is heated to about 1100 ℃, and it will not burst when placed in normal temperature water.

chemical properties

The softening point temperature of quartz glass is about 1730°C, it can be used for a long time at 1100°C, and the maximum use temperature in a short time can reach 1450°C.

Selection of Quartz Tubes

Quartz tube is used for closed tube diffusion, because the quartz tube can withstand high temperatures of about 1250 ° C, and it becomes very soft and sticky when it is above 1800 ° C, and can be made into the required shape. On the other hand, since the raw material used in the quartz tube is super-grade crystal stone, which has high purity and few harmful impurities, and can guarantee the quality of diffusion and alloy preparation, so the closed tube diffusion often uses quartz tube.

Types of Quartz Tubes

Quartz tubes can be roughly divided into the following categories: transparent quartz tubes (outer diameter 1.5mm~300mm), UV filter quartz tubes, colored quartz tubes, etc.

Quartz glass

Quartz glass is made by melting various pure natural quartz (such as crystal, quartz sand, etc.). The linear expansion coefficient is extremely small, which is 1/10~1/20 of ordinary glass, and has good thermal shock resistance. Its heat resistance is very high, the temperature for regular use is 1100℃~1200℃, and the temperature for short-term use can reach 1400℃. Quartz glass is mainly used in laboratory equipment and refining equipment for special high-purity products. It is also an ideal glass for use in spacecraft, wind tunnel windows and spectrophotometer optical systems due to its high spectral transmission and is not damaged by radiation (other glasses will darken when exposed to radiation). 

Quartz flakes

Quartz flakes are usually smelted and cut and ground from quartz, and their silica content can reach more than 99.99%. The hardness is Mohs 7, and it has the characteristics of high temperature resistance, low thermal expansion coefficient, thermal shock resistance and good electrical insulation performance. Usually colorless and transparent, the visible light transmittance is more than 85%. The optical properties of the quartz sheet have its own uniqueness. It can not only transmit far ultraviolet rays, which is the best of all ultraviolet transmissive materials, but also transmit visible light and near-infrared spectrum. Because quartz glass has high temperature resistance, extremely small thermal expansion coefficient, good chemical stability, bubbles, stripes, uniformity, and birefringence comparable to general optical glass, it has high stability optical coefficient in various harsh occasions. Essential optical material.

Quartz tube

Quartz tube is a special industrial technical glass made of silica, which is a very good basic material. Quartz glass has a series of excellent physical and chemical properties. It is used in electric fire barrels, electric ovens and electric heaters to generate heat. Quartz tubes can be roughly divided into the following categories: transparent quartz tubes (outer diameter 1.5mm~300mm), UV filter quartz tubes, colored quartz tubes, etc.

How to use the crystal bowl

The usage is very simple, divide the bowl mouth into three equal parts and tap lightly on three points. The method of knocking with large satellites is commonly used, that is, six times using the method of drawing large satellites. Then, use a stick to gently rub the upper edge of the bowl. The method of friction is divided into forward rotation and reverse rotation. Forward rotation brings new energy, and reverse rotation removes energy. The caveat is: keep the sound steady, don't make it louder and louder. The sound is also maintained within the acceptable range, and if it is too loud, it will turn into noise. It is also very important that this thing is very fragile, please use it gently, and let the sound stop naturally when it is used up. Don't touch it with your hand, because it will destroy the internal structure invisibly, and it will not make a sound after a long time. If you really can't make it stop quickly, just use a stick to press the mouth of the bowl, but it is still used sparingly.