What is Homogenizing Treatment of Tempered Glass
Heat treatment is applied to tempered glass to smooth out defects and enhance quality. This rigorous process improves glass strength and durability. Learn more about the homogenizing treatment process that takes place before tempered glass becomes your go-to choice for all applications!
Tempered glass is becoming the go-to choice for most applications. However, the quality and strength of tempered glass can vary depending on the heat treatment it undergoes. The homogenizing treatment process is the secret behind the improved quality and strength of tempered glass.
What is tempered glass homogenization treatment?
Homogenization treatment of tempered glass, also known as hot dip treatment, is a method of treating tempered glass through specific process conditions, aiming to reduce the self-explosion rate of tempered glass. The main purpose of homogenization treatment is to promote the completion of crystal phase transformation of nickel sulfide crystals in tempered glass, thereby reducing the self-explosion phenomenon caused by the transformation of nickel sulfide crystals
What are the Processes of Tempered Glass Homogenization Treatment?
The process of tempered glass homogenization treatment includes three stages: heating, Temperature-Holding and cooling:
--1. Heating stage:
Heating starts from the ambient temperature and stops when all glass reaches 280℃. The glass surface temperature is not allowed to exceed 320℃. Try to shorten the time when the glass surface exceeds 300℃.
--2. Temperature-Holding Stage:
All glass should be kept for at least two hours after reaching 290℃±10℃.
--3. Cooling stage:
After the temperature-holding stage is completed, the cooling stage is entered to allow the glass to drop to room temperature. When the temperature in the furnace drops to 70°C, the furnace door can be opened to terminate the cooling output.
Our Continuous Tempering Furnace for Tempered Glass:
The Purposes and Effects of Tempered Glass Homogenization Treatment
The main purpose of tempered glass homogenization treatment is to uniformly distribute the stress inside the tempered glass through high-temperature heating, Temperature-Holding, cooling and other processes, thereby improving the strength and temperature resistance of the tempered glass and ensuring its safety and reliability
Specifically, Temperature glass homogenization treatment can achieve the following effects:
--1. Improve safety:
Through homogenization treatment, the internal stress of tempered glass is evenly distributed, which can significantly reduce the self-explosion rate and reduce safety hazards such as cracks and fractures caused by uneven internal stress
--2. Improve reliability:
The homogenized tempered glass has higher strength, better heat resistance, can withstand higher pressure and temperature, and is suitable for a wider range of fields.
--3. Optimize optical properties:
Homogenization treatment can improve the optical properties of tempered glass, such as reducing optical distortion and improving transparency, making the line of sight clearer and improving the visual effect and aesthetics of the tempered glass.
--4. Improve physical and chemical stability:
Homogenization treatment can improve the chemical corrosion resistance and weather resistance of the tempered glass, extend the service life of the tempered glass, and enable it to maintain good performance in various harsh environments.
Why tempered glass needs to be homogenized
The main reasons for homogenizing tempered glass include improving the performance and quality of the tempered glass, reducing the risk of self-explosion, improving the uniformity of the tempered glass, and achieving standardization and quality control.
--1. Improve tempered glass performance and quality
----1.1. Strength and heat resistance:
Homogenization treatment can stabilize the internal pressure and composition of the tempered glass, thereby improving the strength and heat resistance of the tempered glass, reducing problems such as thermal cracking and breakage, and making tempered glass processing and manufacturing more stable and reliable.
----1.2. Optical transparency and chemical stability:
Homogenization for tempered glass can also improve the optical transparency and chemical stability of tempered glass, making it more suitable for applications in various fields, such as optical devices, instrumentation, building materials, etc.
--2. Reduce the risk of self-explosion of tempered glass
Tempered glass is a type of prestressed glass in which compressive stress is usually formed on the surface in order to increase its strength. However, there may be impurities such as nickel sulfide inside tempered glass. These impurities will undergo crystal phase transformation under certain conditions, causing the tempered glass to self-explode. Through homogenization treatment, that is, heating the tempered glass to a certain temperature and keeping it warm for a period of time, impurities such as nickel sulfide can quickly complete the crystal phase transformation, allowing defective tempered glass that may self-explode to be broken in advance in the factory, thereby reducing the need for post-installation Risk of self-explosion during use
--3. Improve tempered glass uniformity
The uniformity of tempered glass is a key indicator of tempered glass quality. Tempered Glass with poor uniformity is prone to problems such as optical distortion and unstable mechanical properties. Through homogenization treatment, the uniformity of the tempered glass can be improved and tempered glass defects caused by uneven batch materials, difficulty in melting and homogenization, etc can be reduced.
--4. Achieve standardization and quality control
Homogenization for tempered glass is a crucial step in tempered glass processing and manufacturing. By following this specification and adopting scientific and reasonable processing and manufacturing techniques, we can ensure that the quality and performance of tempered glass products meet standard requirements. This helps achieve standardization and quality control of tempered glass production, improve tempered glass production efficiency and tempered glass product competitiveness
Do All Tempered Glass Products Have to Be Homogenized?
Not every type of tempered glass must be treated homogeneously, depending on customer needs and the environment in which the tempered glass is used.Homogenization treatment is suitable for areas with high safety requirements, such as automobiles, construction, home appliances, electronics and other industries. These industries need to impose strict requirements on the impact resistance and bending resistance of tempered glass to ensure the safety of use.
What kind of tempered glass needs to be homogenized?
--1. Ordinary tempered glass:
During the production process of ordinary tempered glass, due to the presence of nickel sulfide particles inside, these particles may cause the tempered glass to self-explode when the temperature changes. Through homogenization treatment, these nickel sulfide particles can undergo phase change, thereby reducing the risk of self-explosion of tempered glass.
--2. Silver-based offline Low-E tempered glass:
This kind of tempered glass is easy to explode during use, posing safety risks. Through homogenization, it can be exploded in advance during the heating process to avoid sudden explosion during use, thus greatly reducing safety risks of that silver-based offline Low-e tempered glass during use
Advantages of tempered glass homogenization treatment:
--1. Reduce the risk of self-explosion:
Homogenization treatment can effectively reduce the risk of self-explosion of tempered glass. Through homogenization treatment, impurities such as nickel sulfide remaining in the tempered glass can be eliminated. These impurities are one of the main causes of self-explosion of tempered glass.
--2. Improved safety performance:
The homogenized tempered glass has better uniformity and transparency, and stronger impact resistance, thereby improving the overall safety performance
--3. Improved qualification rate:
During the homogenization process, tempered glass with uneven internal stress will be detonated in advance, avoiding "self-explosion" events that may occur after installation, and improving the qualification rate of tempered glass.
Disadvantages of tempered glass homogenization treatment:
--1. Increased costs:
Homogenization requires additional equipment and time, increasing production costs. The use and maintenance costs of the homogenization furnace are high, resulting in an increase in the price of the final tempered glass product.
--2. Complex process:
The homogenization process of tempered glass requires precise control of temperature and air flow. The process is complex and requires high technical requirements for operators.
--3. Cause tempered glass embrittlement:
Homogenization treatment eliminates the internal stress of the tempered glass through instantaneous heating and cooling. If not handled properly, the internal stress of the tempered glass may not be completely eliminated. Instead, the tempered glass may become brittle and prone to cracks or fragments.
--4. May affect the physical properties of the tempered glass:
During the homogenization process, high-temperature heating and rapid cooling may have a certain impact on the physical properties of the tempered glass, such as reducing its heat resistance and cold resistance
What Are the Applications of Homogeneous Tempered Glass
--1. Architecture field:
In the construction field, homogeneous tempered glass is widely used in glass curtain walls, glass doors and windows, glass handrails and glass partitions. Due to its high strength and safety, homogeneous tempered glass can withstand large impact forces and will not form sharp fragments when broken, reducing personal injury.
--2. Home appliance field:
In the field of home appliances, homogeneous tempered glass is commonly used in color TVs, microwave ovens, ovens, refrigerators and washing machines. Due to its high transparency, good formability and smooth surface, homogeneous tempered glass is regarded as the material of choice for high-end home appliances
--3. Automotive field:
In the automotive field, homogeneous tempered glass is used in car windows, rearview mirrors, car lights, etc. Its high hardness, high strength and high transparency can effectively improve the safety and comfort of cars.
--4. Furniture Design:
In furniture design, homogeneous tempered glass can be used for tabletops, cabinet doors, etc. It is not only beautiful, but also safe and suitable for long-term use
--5. Public Facilities:
In public facilities such as stadiums, airports and other crowded public places, homogeneous tempered glass can ensure public safety.
Homogenization treatment for tempered glass is suitable for areas with high safety requirements, such as automobiles, construction, home appliances, electronics and other industries. These industries have strict requirements on the impact resistance and bending resistance of tempered glass, and homogenization treatment is an effective solution. However, homogenization treatment will increase a certain cost and may have a certain impact on the transparency of the glass surface, so customers need to balance the relationship between cost and safety when choosing.
About Huide Glass:
Huide Glass has been in that processing business of tempered glass sheets products for around 13 Years since 2011. We have strong production and development capabilities, and currently has 7 automatic cutting machines, 8 edge grinding lines, there are 8 CNC precision grinding processing centers; there are 3 tempering furnaces(one for North-Glass, one for Yihai, and one for continuous tempering furnace SOUTHTECH). we can fabricate tempered glass sheet products 3,000,000 square meter per year.
Our tempered glass products includes tempered glass shelf for refrigerator, tempered glass door for refrigerators, tempered glass lid for household washing machines, tempered glass sheet for smart tea table top or bedside table top, tempered glass cover panel for water cleaner and water heater, tempered glass cover for advertising billboard, tempered glass top and front door panel for tea bar machine, tempered glass cover panel for display cabinet, display box, or tempered glass cover sheet for showcase counter,etc, and also we can do customized manufacturing according to your unique real applications. if you want to know more, don't hesitate to contact us.
