{"id":93,"date":"2026-02-06T07:46:46","date_gmt":"2026-02-06T07:46:46","guid":{"rendered":"https:\/\/www.jundro.com\/?p=93"},"modified":"2026-04-13T01:28:35","modified_gmt":"2026-04-13T01:28:35","slug":"zerodur-or-ule-glass","status":"publish","type":"post","link":"https:\/\/www.jundro.com\/de\/zerodur-or-ule-glass\/","title":{"rendered":"Zerodur or ULE Glass: How to Choose\uff1f"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">When discussing low thermal expansion glass, Schott&#8217;s Zerodur and Corning&#8217;s ULE glass immediately come to mind, both renowned for their near-zero coefficient of thermal expansion. So, which should you choose for your application: Zerodur or ULE? Through our multi-dimensional comparison, we hope to help you make a clearer choice of the appropriate material.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"what-is-lorem-ipsum\">Materials Overview<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Zerodur<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Developed by Schott AG of Germany, low-thermal-expansion glass-ceramics are available in six different thermal expansion grades. (<a href=\"https:\/\/jundro.sytech.site\/material\/zerodur\/\">You can click on the link to view the detailed introduction of Zerodur<\/a>) They offer low CTE while possessing mechanical strength not found in ordinary glass, allowing for high-precision machining.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img decoding=\"async\" width=\"800\" height=\"800\" src=\"https:\/\/www.jundro.com\/wp-content\/uploads\/2026\/02\/Low-expansion-zerodur-glass-1.jpg\" alt=\"\" class=\"wp-image-529\" style=\"width:235px;height:auto\" srcset=\"https:\/\/www.jundro.com\/wp-content\/uploads\/2026\/02\/Low-expansion-zerodur-glass-1.jpg 800w, https:\/\/www.jundro.com\/wp-content\/uploads\/2026\/02\/Low-expansion-zerodur-glass-1-500x500.jpg 500w, https:\/\/www.jundro.com\/wp-content\/uploads\/2026\/02\/Low-expansion-zerodur-glass-1-150x150.jpg 150w, https:\/\/www.jundro.com\/wp-content\/uploads\/2026\/02\/Low-expansion-zerodur-glass-1-768x768.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">ULE<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">ULE glass, developed by Corning, has a stable coefficient of thermal expansion. It can operate at temperatures up to 800\u00b0C, exhibiting excellent temperature adaptability and preventing deformation caused by thermal expansion and contraction. (<a href=\"https:\/\/jundro.sytech.site\/material\/ule-glass\/\">Click to view ULE details<\/a>)<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"composition-and-how-it-s-made\">Thermal Performance Comparison<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Zerodur exhibits a near-zero coefficient of thermal expansion (CTE) at a specific temperature range, making it ideal for applications requiring extremely high dimensional stability.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In contrast, ULE provides a more uniform and stable CTE over a broader temperature range, which is advantageous in environments with temperature fluctuations.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In semiconductor lithography systems\u2014particularly EUV applications\u2014Zerodur is more commonly used due to its ultra-low thermal expansion and superior long-term stability, which are critical for maintaining optical precision.\uff08<a href=\"https:\/\/jundro.sytech.site\/comparison\/\">Click here to learn more about the performance comparison of materials.<\/a>\uff09<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>characteristic<\/th><th>Zerodur<\/th><th>ULE Glass<\/th><\/tr><\/thead><tbody><tr><td>Coefficient of Thermal Expansion (CTE)<\/td><td>0 \u00b1 0.02\u00d710\u207b\u2076\/K (Class 0)<\/td><td>0.00 \u00b1 0.03\u00d710\u207b\u2076\/\u00b0C<\/td><\/tr><tr><td>Maximum operating temperature<\/td><td>600\u00b0C<\/td><td>800\u00b0C<\/td><\/tr><tr><td>Thermal conductivity<\/td><td>1.46 W\/(m\u00b7K)<\/td><td>1.31 W\/(m\u00b7K)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"what-is-lorem-ipsum\">Mechanical and optical properties<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">n terms of material density, ULE is approximately 13% lighter than Zerodur, making it more suitable for weight-sensitive applications such as space payloads.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Regarding mechanical properties, Zerodur exhibits higher bending strength, offering better tolerance during precision machining processes.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">As for optical homogeneity, both materials offer excellent performance; however, ULE generally provides superior refractive index uniformity, making it more suitable for applications highly sensitive to wavefront distortion, such as laser interferometers.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Parameter<\/th><th>Zerodur<\/th><th>ULE Glass<\/th><\/tr><\/thead><tbody><tr><td>Density<\/td><td>2.53g\/cm\u00b3<\/td><td>2.21g\/cm\u00b3<\/td><\/tr><tr><td>Optical uniformity<\/td><td>600\u00b0C<\/td><td>\u00b11 \u00d7 10\u207b\u2076<\/td><\/tr><tr><td>Bending strength<\/td><td>~40 MPa<\/td><td>~30 MPa<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"composition-and-how-it-s-made\">Application<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Zerodur<\/th><th>ULE<\/th><\/tr><\/thead><tbody><tr><td>Laser gyroscope mirrors<\/td><td>Astronomical optical mirror<\/td><\/tr><tr><td>Spectrometer optical components<\/td><td>Lithography machine radiation mirror<\/td><\/tr><tr><td>Wafer stepper components<\/td><td>Laser interferometer cavity<\/td><\/tr><tr><td>Mechanical laser resonator parts<\/td><td>Laser rangefinder components<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Custom ULE &amp; Zerodur Machining Manufacturer<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">We have extensive knowledge and experience in the machining of optical glass materials, and provide customized machining of various high-precision optical glass materials, including special-shaped, round and curved surfaces, and have five-axis precision machining capabilities.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>If you are selecting optical glass materials for your project, please contact our experts and we will provide strong support for your project.<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Et interdum acciderat, ut siquid in penetrali secreto nullo citerioris vitae ministro praesente paterfamilias<\/p>\n","protected":false},"author":1,"featured_media":529,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[],"class_list":["post-93","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-quality-process"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Zerodur or ULE Glass: How to Choose\uff1f<\/title>\n<meta name=\"description\" content=\"Explore the advantages and limitations of Zerodur and ULE to determine the best choice for your application. 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