FERRO是全球的特种材料制造商之一，公司成立于1919年，目前已经发展成为年销售额达二十多亿美金的上市公司。PTCR测温环的全生产过程已获得ISO9002质量认证，从各方面（原料精选，生产过程控制，产品检验换算表的制定）保证产品
准确、可靠、方便
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| 测温环产品介绍 |
产品型号及应用领域 |
测温环产品规格 |
测温环工作原理及使用方法 |
| 测定窑炉温度分布图 |
测温环测量的优点 |
测温环改善窑炉烧成产品质量案例 |
测温环应用窑炉图示 |
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| FERRO Process Temperature Control Rings 560~1750℃ |
测温环特性：
很多高温耐火产品在生产过程中需要精准有效地测量窑炉温度，但多数测量手段和工具在时间和空间上均受到限制。
例如：热电偶并不能测量产品本身的温度，而是产品烧制时的环境温度。热电偶记录在顶端获得的温度，只是空间和时间的一点， 一个热电偶无法决定加热过程；一只热电偶是无法提供窑炉在不同方位加热是否均匀的信息，它只能测辐射热，而不涉及来自窑炉 具的传导热。
FERRO 测温环是一种高精密度的陶瓷温度指示器，它忠实记录了烧制过程中制品所经历的热过程。
FERRO 测温环不仅可以测出辐射热与放射热，还考虑了温度随时间推移所产生的影响。
FERRO 测温环能方便地把受热过程以一个简单的数字来表示--环温度(RT)，便于应用在实际工作中。 |
Process Temperature Control Rings
Higher quality products and lower costs through improved, reliable firing control
Take control of your firing process
In the manufacture of ceramic products, few things are as critical as accurate control of the firing process. After all, the results have a direct effect on the quality - and the costs - of the final product.
Optimal firing control requires both accurate measurement of the heat treatment - the temperature and its effect over time - together
with the ability to control the temperature and the uniformity of its distribution throughout the kiln. Effective temperature measurement
is the key to guaranteed product quality.
Most conventional temperature measurement techniques are limited both in time and in location. For example, the thermocouples
generally used in the ceramic industry do not measure the temperature of the product itself,but that of its vicinity. They are also limited to measuring radiated heat, and take no account of heat transferred from kiln furniture.
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广东测温环 |
| FERRO Process Temperature Control Rings 陶瓷测温环的型号及应用行业 |
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| FERRO Process Temperature Control Rings 测温环规格 |
PTCR测温环尺寸： 外径：20mm， 内径：10mm， 厚度：7.0mm。
PTCR为可靠的高精度产品，*大误差小于3℃。甚至可达1.5℃。
产品包装：15个/小纸盒、600个/大盒。
The multifunctional PTCR concept comprises
• improved ceramic PTCR rings
• improved, convenient packaging
• the PTCR micrometer with numerical or digital
read-out
• a batch-specific temperature table
PTCR: What it is
The Process Temperature Control Ring, PTCR,is a highly accurate ceramic temperature indicator which records the true heat treatment received by the fired product. PTCR rings take account of both radiated and transferred heat, as well as the effects of temperature over time. It conveniently allows this recorded heat exposure to be expressed as a single number - ring temperature (RT) - which is practical and easy to work with.
PTCR rings can be used in both batch and continuous tunnel kilns; they are used in a range of atmospheres*. Five different PTCRtypes are available - in heights of 3.5 and 7.0mm - covering a range from 850 to 1750°C(1562 to 3182°F). Ring types are identified by
color coding and batch and type numberspressed into the ring.
Originally PTCR has been developed for inhouse application in critical firing processes for advanced electronic ceramic components.
Now, the PTCR brings the benefits of easy,accurate kiln temperature measurement to awide range of industries.
PTCR: How it works
When exposed to heat in the kiln, the PTCR ring contracts - and continues contracting as the top temperature is maintained over time.
The degree of contraction is almost linear over the complete operating range of the PTCR,providing a practical measure of the
accumulated heat to which the ring - and the fired products - have been subjected.
The amount of contraction - the amount by which the ring diameter has shrunk - is measured with a numerical or digitalmicrometer. This measurement can be converted to 'ring temperature' for ease of comparison and correlation to the firing process.
PTCR: Quality you can rely on
PTCR is recognized for its accuracy and reliability, and its recently improved technology now offers an unsurpassed
accuracy guarantee: a minimum variation of 3°RT. **
This reliability is based on a stringent manufacturing process. PTCR rings are made from a mix of high-grade materials. Their
composition is fine-tuned through advanced Design Of Experiments- (DOE) techniques, and the production process itself is controlled by Statistical Process Control. In fact, the entire PTCR manufacturing facilities have been awarded the internationally recognized ISO
9001:2000 and ISO 14001 quality certification.
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| FERRO PTCR测温环工作原理及使用方法： |
1、FERRO PTCR测温环具有公认的准确性和可靠性，测温环几乎可被放置在窑炉的任何位置，炉体内、推板或传输带上 ，在使用前,不必测量温度；
2、FERRO PTCR陶瓷测温环的工作原理是根据其在工作温度范围内的线性收缩，从而给出测温环和烧成品的实际累计热量，对照换算表得出测试温度，烧制结束后，将测温环取走并做记号；
3、FERRO PTCR陶瓷测温环在窑炉中受热时，它就收缩，并在*高温度随保温时间延长而继续收缩。 在其使用温度范围内，收缩率是线性的，这为FERRO陶瓷测温环和被烧制的产品所受到的加热量提供了一种实用的测量方法；收缩量(环直径的减少)可用数字 千分尺测量 ，使用的手持数字千分尺记录每一片测温环的直径,准确 到0.01mm；
4、参照包装上所附的 环外径与温度对照表、温度校正曲线图(随产品提供)，所测出的测温环直径可转换成 等效温度。
注意：为了使用时准确和方便FERRO测温环 每个温度表都是为该批测温环而特别制定的，所标的生产批号必须与温度 对照表上的保持一致。 |
PTCR in practice: accuracy and convenience
Firing process optimization
In the process of establishing a standard, the firing process is characterized by 'mapping' the ring temperatures of PTCR rings distributed throughout the kiln. This allows the 'hot' and 'cold spots' to be detected and defined.
Using the heat treatment mapping, the firing process can then be optimized by offsetting heat sources or thermocouples as indicated by the variations in ring temperatures. As a rule of thumb, one degree of ring temperaturecorresponds to one degree Celsius. The exact relationship between ring temperature and
degrees Celsius is of course dependent upon the specific firing cycle of the kiln.
The adjoining illustration shows two heat treatment mappings of the same 15m3 kiln.
The first was generated before using thePTCR; the second, after firing process optimization using PTCR rings,
resulting in substantial yield improvement.
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Firing process control
In the course of time - as a result of aging of the heating elements or frequently alternating firing cycles - 'hot' and 'cold spots' maygradually return to the kiln.The PTCR can help here, too. Once the firing process has been optimized, PTCR rings can be used regularly to monitor the firing process and to detect these deviations as they gradually arise, before they affect product quality.
By comparing the current ring temperatures against the defined standard, the number of degrees of ring temperature by which the firing process must be adjusted can be determined. Using several rings at critical locations in the kiln ensures that an even heat distribution is maintained.
Quality control at lower cost
Besides the benefits of yield improvement through optimization of the firing process, the PTCR can also help reduce production costs.Simple comparison of ring temperature against a quality standard indicates whether the products are sintered to specification.Expensive, time-consuming conventional quality checks - destruction testing, geometry,density and porosity tests - can be reduced or eliminated.
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| 测温环测定窑炉温度分布图: |
| 测温环被广泛应用于连续窑和非连续隧道窑、梭式窑、辊道窑、钟罩窑等等，推荐使用多位放置和多水平放置，这可使您对窑内热分部有个*直接地了解。 FERRO PTCR测温环可应用在氧气、氮气、空气、真空和还原等不同烧成气氛中。 |
| 窑炉应用FERRO测温环测量的优点： |
1、FERRO测温环使用机动灵活，可简易方便测定炉内三维空间温度分布的任何角落。
2、FERRO测温环安放位置*好贴近产品实际受热状态，准确测定烧制品 实际受热情况。
3、FERRO测温环一致性良好，可以保证产品烧成制度的良好重现性，从而提高成品的合格率。
4、使用FERRO测温环可以减少甚至不再需要通过对烧成品的几何形状，密度和多孔性测量或破坏性试验。
从而减少生产过程中的质量控制成本。
5、FERRO测温环陶瓷测温环为可靠的高精度产品，具有公认的准确性和可靠性，准确的温差达1.5—3℃。 |
Method of use
Positioning
PTCR rings can be placed at almost any location in the kiln, on kiln furniture, trolleys or transports. The use of both multi-location and
multi-level positioning is recommended, as this provides the most insight into the heat treatment distribution within the kiln.
Measuring
The contraction of the PTCR diameter reflects the actual heat treatment at the point where the ring was located in the kiln. The diameter
is easily measured using a PTCR micrometer - only a single measurement is required (as shown).
PTCR micrometers Numerical (N) and Digital(D) have an integral, ergonomically designed solid base with a ring positioning chuck, which ensures the ring is always correctly positioned in the micrometer. This design not only simplifies the measuring process, but also
improves the repeatability and reproducibility of ring temperature measurement.
Converting to ring temperature
The measured ring diameter is converted to ring temperature using the conversion table enclosed in each packing unit. Each table is
specific to the particular batch of rings, for accuracy and convenience.The ring temperature is a practical single number which is useful for comparison purposes - for instance to relate the recorded heat treatment to the firing process and defined standards - so that any required adjustments can be made. It does not necessarily reflect the actual kiln temperature; the PTCR acts as an accumulator, measuring the total heat treatment over time, rather than the maximum temperature attained.
Establishing a standard ring temperature
In order to make ring temperature comparisons between different firings, a standard ring temperature must be defined. This is done by
including PTCR rings in a series of firings, and relating their ring temperatures to the quality of the products produced.
The ring temperature which corresponds to products fired to the correct specifications can be used as the standard.
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