{"id":4985,"date":"2025-09-04T17:23:05","date_gmt":"2025-09-05T02:53:05","guid":{"rendered":"https:\/\/jundro.io\/?p=4985"},"modified":"2025-09-04T18:01:44","modified_gmt":"2025-09-05T03:31:44","slug":"top-5-low-thermal-expansion-glasses-comparison-properties-material-selection-guide","status":"publish","type":"post","link":"https:\/\/jundro.io\/zh\/5-\u5927\u4f4e\u70ed\u81a8\u80c0\u73bb\u7483\u6027\u80fd\u6bd4\u8f83-\u6750\u6599\u9009\u62e9\u6307\u5357\/","title":{"rendered":"5 \u5927\u4f4e\u70ed\u81a8\u80c0\u73bb\u7483 - \u5bf9\u6bd4\u3001\u7279\u6027\u548c\u6750\u6599\u9009\u62e9\u6307\u5357"},"content":{"rendered":"\t\t
\n\t\t\t\t
\n\t\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

Engineers and buyers in fields such as precision optics, semiconductors, and laser systems often require materials with extremely low thermal expansion coefficients for their equipment components. Low-expansion glass can minimize thermal deformation and maintain dimensional stability. Today, I’ll compare the five most commonly used low-expansion materials\u2014Zerodur, ULE, ClearCeram (glass-ceramic), BF33 (Borofloat 33), and Fused Silica\u2014to help you better select the material that best suits your needs.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"Top-5-Low-Thermal-Expansion-Glasses\"\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t

Material Profiles<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t

Zerodur<\/a><\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

Microcrystalline glass-ceramic, available in a variety of customizable thermal expansion grades (click here to view detailed grades<\/a><\/span>). It offers excellent dimensional stability and is suitable for high-precision machining.
Why choose it<\/strong>: Best for large optics and applications requiring sub-micron stability over time and temperature cycles.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

\n\t\t\t\t
\n\t\t\t\t\t

ULE (Ultra-Low Expansion)<\/a><\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

Fused silica variant with engineered composition to reach near-zero CTE.
Why choose it<\/strong>: Superior for ultra-stable optical cavities and laser reference structures.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

\n\t\t\t\t
\n\t\t\t\t\t

ClearCeram \/ Glass-Ceramics<\/a><\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

Controlled crystallization reduces CTE while improving toughness.
Why choose it<\/strong>: Balance of low expansion, impact resistance, and machinability; good for medium-precision optical assemblies.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

\n\t\t\t\t
\n\t\t\t\t\t

BF33 (Borofloat 33)<\/a><\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

Borosilicate glass with moderate low CTE, excellent chemical resistance, and high transmission through visible wavelengths.<\/p>

Why choose it:<\/strong> Cost-effective for semiconductor process windows, inspection ports, and lab equipment where ultra-low drift is not mandatory.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

\n\t\t\t\t
\n\t\t\t\t\t

Fused Silica (Fused Quartz)<\/a><\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

High-purity silicon dioxide glass with extremely low thermal expansion and excellent optical transmission from deep UV to NIR.<\/p>

Why choose it<\/strong>: Ideal when low thermal drift, UV compatibility, and high laser-damage threshold are required. Often preferred for precision photonics, laser systems, and demanding semiconductor windows.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

\n\t\t\t\t
\n\t\t\t\t\t

CTE Comparison Table<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t
\n\n\n\n\n\n\n\n
Material<\/td>\nTypical CTE (\u03b1, \u00d710\u207b\u2076 \/K)<\/td>\n<\/tr>\n
Zerodur<\/td>\n~0 \u00b10.02<\/td>\n<\/tr>\n
ULE<\/td>\n~0 \u00b10.03<\/td>\n<\/tr>\n
ClearCeram<\/td>\n~0 \u00b10.1<\/td>\n<\/tr>\n
BF33<\/td>\n\u22483.3<\/td>\n<\/tr>\n
Fused Silica<\/td>\n\u22480.5<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t

Practical selection guide <\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

  1. Need absolute long-term dimensional stability (nm-scale)?<\/strong> \u2192 ULE \/ Zerodur<\/strong>.<\/span><\/p><\/li>

  2. Require low CTE + better mechanical toughness?<\/strong> \u2192 ClearCeram \/ Zerodur<\/strong><\/span><\/p><\/li>

  3. Need optical window with chemical resistance and moderate thermal performance?<\/strong> \u2192 BF33<\/strong>.<\/span><\/p><\/li>

  4. Need low CTE, UV transmission, or high laser-damage threshold?<\/strong> \u2192 Fused Silica<\/strong>.<\/span><\/p><\/li>

  5. On a strict budget for non-critical thermal environments?<\/strong> \u2192 Evaluate BF33 or lower-cost substrates depending on optical requirements.<\/span><\/p><\/li><\/ol>

    <\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
    \n\t\t\t\t
    \n\t\t\t\t\t

    Low thermal expansion glass machining<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
    \n\t\t\t\t
    \n\t\t\t\t\t\t\t\t\t

    Jundro has extensive expertise in machining ultra-hard materials, with rich experience in producing complex geometries, including curved surfaces, intricate shapes, honeycomb, and lightweight structures. Our optical components achieve a flatness accuracy of up to 1\/20\u03bb, and we can also provide optical coating services. If you have any material machining needs, please feel free to contact us.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

    \n\t\t\t\t
    \n\t\t\t\t\t\t\t\t\t
    \n\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\tQuote<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

    Engineers and buyers in fields such as precision optics, semiconductors, and laser systems often require materials with extremely low thermal expansion coefficients for their equipment components. Low-expansion glass can minimize thermal deformation and maintain dimensional stability. Today, I’ll compare the five most commonly used low-expansion materials\u2014Zerodur, ULE, ClearCeram (glass-ceramic), BF33 (Borofloat 33), and Fused Silica\u2014to […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-4985","post","type-post","status-publish","format-standard","hentry","category-material-news"],"_links":{"self":[{"href":"https:\/\/jundro.io\/zh\/wp-json\/wp\/v2\/posts\/4985","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jundro.io\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/jundro.io\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/jundro.io\/zh\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/jundro.io\/zh\/wp-json\/wp\/v2\/comments?post=4985"}],"version-history":[{"count":0,"href":"https:\/\/jundro.io\/zh\/wp-json\/wp\/v2\/posts\/4985\/revisions"}],"wp:attachment":[{"href":"https:\/\/jundro.io\/zh\/wp-json\/wp\/v2\/media?parent=4985"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jundro.io\/zh\/wp-json\/wp\/v2\/categories?post=4985"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jundro.io\/zh\/wp-json\/wp\/v2\/tags?post=4985"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}