99.7 Ceramic Sheath

advantages

1. High purity ceramic materials ensure stable insulation

The 99.7 ceramic sheath is made of high-purity alumina, which provides excellent electrical insulation performance even under harsh operating conditions. Low impurity content helps reduce leakage and facilitates more reliable signal transmission for temperature sensors and heating elements used in industrial equipment.

2. Excellent high temperature resistance performance

Unlike many metal protective tubes, alumina ceramics can maintain structural stability at most industrial furnace temperatures. This material has minimal softening and maintains its dimensional accuracy, allowing sensitive measuring components to remain in the correct position over long production cycles.

3. Chemical corrosion resistance

The stable crystal structure and high purity make the product highly resistant to corrosion from most acids, bases, organic solvents, and high-temperature gases. It does not react with most metal melts and glass melts at high temperatures, and can resist erosion to some extent by reducing atmospheres such as hydrogen and carbon monoxide. In petrochemical and pharmaceutical production environments with corrosive media, its service life is several times longer than that of metal protective tubes, and it will not cause impurity contamination to the product, making it suitable for high-purity production scenarios.

4. High mechanical hardness

The dense ceramic body provides excellent surface hardness and compressive strength. It can withstand the wear and tear of particulate matter in the air, powder movement, and repeated contact during installation or maintenance. Even in equipment exposed to continuous vibration or dust, properly selected ceramic sheaths can continue to protect internal components.

5. Stable size under thermal cycling

Repeated heating and cooling will gradually affect many engineering materials. High quality alumina ceramics have low thermal expansion, which helps to maintain precise dimensions of the protective tube after multiple operating cycles.

6. High airtightness and pollution resistance

After high-temperature densification sintering, the product has a near zero porosity and excellent airtightness, which can effectively prevent high-temperature gases, molten liquids, and dust from infiltrating the pipe and corroding internal components. For production scenarios such as semiconductors and electronic ceramics that require extremely high purity, high-purity alumina materials themselves will not precipitate harmful impurities at high temperatures, avoiding secondary pollution of the production environment and products caused by the protective tube itself.

Precautions

1. After receiving the 99.7 ceramic sheath, ensure that the tube is dry and does not leave any water vapor.
2. The alumina insulated ceramic sheath may appear in different colors and can be improved by exposing the pipeline to sunlight for a period of time.
3. 99.7 Ceramic sheaths should be uniformly heated to avoid sudden cooling and heating. Items with significant temperature differences from ceramic tubes should not be used in contact with the tube body.
4. The maximum working temperature of the aluminum oxide thermocouple protection tube is 1800 degrees, but we recommend long-term use at temperatures below 1700 degrees and keeping it vertically placed, which will greatly improve the service life of the protection tube.

Packaging and after-sales advantages

Packaging and after-sales advantages

1. Multi layer damage proof and waterproof packaging: use bubble film for separate packaging+customized foam card slot+wooden box, with built-in moisture-proof film to eliminate transport damage and packaging moisture.
2. Comprehensive international logistics: Deeply cooperate with DHL, FEDEX, and international freight forwarders to support door-to-door delivery, domestic/neighboring country delivery takes 3-5 days, international air freight takes 7-15 days, and sea freight takes 25-35 days.
3. Comprehensive services: 24-hour professional technical team online Q&A, providing free samples, supporting product drawings and parameter tables;
4. Full process order tracking: Provide a logistics tracking number after the order is shipped to track the logistics progress in real time; Regular follow-up visits are conducted after product delivery to promptly resolve various issues that arise during customer use.

Product data 

Why choose us?

When choosing ceramic sleeves, in addition to the product itself, we value the peace of mind in cooperation. We have been producing alumina ceramic products for many years and have always put meeting customer needs and solving practical problems as our top priority.
1. Direct supply from the manufacturer, dual control of price and quality: With our own production base, research and development, and testing team, we control the entire process from raw materials to finished products ourselves, without middlemen making any profit. This ensures stable product quality and provides real purchase prices.
2. Customization is flexible and can meet niche needs: With a professional technical team to connect with customization needs, whether it is size, shape, or process adjustment, we can quickly come up with solutions. The minimum order quantity for customization is low, so you don't have to order too much just for customization, reducing your trial and error costs.
3. Stable supply, no need to worry about production delays due to stockouts: Standard models have regular inventory, and customized models have sufficient production capacity. Whether it's small batch replenishment or large-scale procurement, we can ensure timely delivery and not slow down your production pace due to supply issues.

FAQ

Q1: What is the main function of 99.7 ceramic sheath?
A1: Its main purpose is to protect thermocouples, heating elements, or temperature sensors from mechanical wear, corrosion, and direct exposure to high temperature environments, while maintaining measurement stability.
Q2: Can it work continuously at high temperatures?
A2: Yes. High purity alumina ceramics are designed for harsh thermal environments and maintain excellent dimensional stability during long-term operation within the recommended operating range.
Q3: Is customization possible?
A3: Yes. Processing details such as length, outer diameter, inner diameter, wall thickness, open or closed end can be customized according to application requirements.
Q4: How should ceramic sheaths be handled?
A4: Although alumina ceramics have high hardness and strength, they are still brittle materials. Proper handling, proper installation, and avoiding excessive impact can significantly extend the service life.